BOK Financial (BOKF) 10-K 26 Feb 14 2013 Q4 Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Jan. 31, 2014	Jun. 30, 2013
Document and Entity Information [Abstract]	'	'	'
Entity Registrant Name	'BOK FINANCIAL CORP ET AL	'	'
Entity Central Index Key	'0000875357	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Voluntary Filers	'Yes	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$1,700,000,000
Entity Common Stock, Shares Outstanding	'	68,900,457	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'Q4	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'

Consolidated_Statements_of_Ear

Consolidated Statements of Earnings (Unaudited) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest revenue	'	'	'
Loans	$498,600	$513,429	$504,989
Residential mortgage loans held for sale	8,505	8,185	6,492
Trading securities	1,962	1,419	1,836
Investment securities, Taxable securities	14,260	16,848	12,581
Investment securities, Tax-exempt securities	4,781	3,577	4,768
Total investment securities	19,041	20,425	17,349
Available for sale securities, Taxable securities	204,830	237,226	258,828
Available for sale securities, Tax-exempt securities	2,380	2,487	2,394
Total available for sale securities	207,210	239,713	261,222
Fair value option securities	3,907	8,464	18,649
Restricted equity securities	5,071	2,291	2,118
Interest-bearing cash and cash equivalents	1,075	945	491
Total interest revenue	745,371	794,871	813,146
Interest expense	'	'	'
Deposits	55,564	67,013	88,890
Borrowed funds	6,589	6,531	8,826
Subordinated debentures	8,741	13,778	22,385
Total interest expense	70,894	87,322	120,101
Net interest revenue	674,477	707,549	693,045
Provision for credit losses	-27,900	-22,000	-6,050
Net interest revenue after provision for credit losses	702,377	729,549	699,095
Other operating revenue	'	'	'
Brokerage and trading revenue	125,478	126,930	104,181
Transaction card revenue	116,823	107,985	116,757
Trust fees and commissions	96,082	80,053	73,290
Deposit service charges and fees	95,110	98,917	95,872
Mortgage banking revenue	121,934	169,302	91,643
Bank-owned life insurance	10,155	11,089	11,280
Other revenue	38,262	34,604	34,070
Total fees and commissions	603,844	628,880	527,093
Gain (loss) on assets, net	-925	-1,415	4,156
Gain (loss) on derivatives, net	-4,367	-301	2,686
Gain on fair value option securities, net	-15,212	9,230	24,413
Change in fair value of mortgage servicing rights	22,720	-9,210	-40,447
Gain on available for sale securities, net	10,720	33,845	34,144
Total other-than-temporary impairment losses	-2,574	-1,144	-10,578
Portion of loss recognized in (reclassified from) other comprehensive income	266	-6,207	-12,929
Net impairment losses recognized in earnings	-2,308	-7,351	-23,507
Total other operating revenue	614,472	653,678	528,538
Other operating expense	'	'	'
Personnel	505,225	491,033	429,986
Business promotion	22,598	23,338	20,549
Contribution to BOKF Foundation	2,062	2,062	4,000
Professional fees and services	32,552	34,015	28,798
Net occupancy and equipment	69,773	66,726	64,611
Insurance	16,122	15,356	16,799
Data processing and communications	106,075	98,904	97,976
Printing, postage and supplies	13,885	14,228	14,085
Net losses and expenses of repossessed assets	5,160	20,528	23,715
Amortization of intangible assets	3,428	2,927	3,583
Mortgage banking costs	31,088	44,334	37,621
Other expense	32,652	26,912	37,575
Total other operating expense	840,620	840,363	779,298
Income before taxes	476,229	542,864	448,335
Federal and state income tax	157,298	188,740	158,511
Net income	318,931	354,124	289,824
Net income attributable to non-controlling interests	2,322	2,933	3,949
Net income attributable to BOK Financial Corp. shareholders	$316,609	$351,191	$285,875
Earnings per share:	'	'	'
Basic (in dollars per share)	$4.61	$5.15	$4.18
Diluted (in dollars per share)	$4.59	$5.13	$4.17
Average shares used in computation:	'	'	'
Basic (in shares)	67,988,897	67,684,043	67,787,676
Diluted (in shares)	68,205,519	67,964,940	68,038,763
Dividends declared per share (in dollars per share)	$1.54	$2.47	$1.13

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'		'		'
Net income	$318,931		$354,124		$289,824
Other Comprehensive Income (Loss), before Tax [Abstract]	'		'		'
Net change in unrealized gain (loss)	-275,945		66,197		47,287
Reclassification adjustments included in earnings [Abstract]	'		'		'
Interest revenue, Investment securities, Taxable securities	-3,210		-6,601		-1,357
Interest expense, Subordinated debentures	262		453		304
Net impairment losses recognized in earnings	-2,308		-7,351		-23,507
Gain on available for sale securities, net	-10,720		-33,845		-34,144
Other comprehensive income (loss) before income taxes	-287,305		33,555		35,597
Federal and state income tax	-111,762	[1]	12,614	[1]	14,457	[1]
Other comprehensive income (loss), net of income taxes	-175,543		20,941		21,140
Comprehensive income	143,388		375,065		310,964
Comprehensive income attributable to non-controlling interests	2,322		2,933		3,949
Comprehensive income attributable to BOK Financial Corp. shareholders	$141,066		$372,132		$307,015
[1]	1 Calculated using 39% effective tax rate.

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Assets	'		'
Cash and due from banks	$512,931		$710,739
Interest-bearing cash and cash equivalents	574,282		575,500
Trading securities	91,616		214,102
Investment securities	677,878	[1]	499,534	[2]
Available for sale securities	10,147,162		11,287,221
Fair value option securities	167,125		284,296
Restricted equity securities	85,240		64,807
Residential mortgage loans held for sale	200,546		293,762
Loans	12,792,264		12,311,456
Allowance for loan losses	-185,396		-215,507
Loans, net of allowance	12,606,868		12,095,949
Premises and Equipment, net	277,849		265,920
Receivables	117,126		114,185
Goodwill	359,759		361,979
Intangible assets, net	24,564		28,192
Mortgage servicing rights, net	153,333		100,812
Real estate and other repossessed assets	92,272		103,791
Derivative contracts	265,012		338,106
Cash surrender value of bank-owned life insurance	284,801		274,531
Receivable on unsettled securities trades	17,174		211,052
Other assets	359,894		324,153
Total assets	27,015,432		28,148,631
Liabilities and Shareholders' Equity [Abstract]	'		'
Noninterest-bearing demand deposits	7,316,277		8,038,286
Interest-bearing deposits:	'		'
Transaction	9,934,051		9,888,038
Savings	323,006		284,744
Time	2,695,993		2,967,992
Total deposits	20,269,327		21,179,060
Funds purchased	868,081		1,167,416
Repurchase agreements	813,454		887,030
Other borrowings	1,040,353		651,775
Subordinated debentures	347,802		347,633
Accrued interest, taxes and expense	194,870		176,678
Derivative contracts	247,185		283,589
Due on unsettled securities trades	45,740		297,453
Other liabilities	133,647		164,316
Total liabilities	23,960,459		25,154,950
Shareholders' equity:	'		'
Common stock	4		4
Capital surplus	898,586		859,278
Retained earnings	2,349,428		2,137,541
Treasury stock	-202,346		-188,883
Accumulated other comprehensive income (loss)	-25,623		149,920
Total shareholders' equity	3,020,049		2,957,860
Non-controlling interest	34,924		35,821
Total equity	3,054,973		2,993,681
Total liabilities and equity	$27,015,432		$28,148,631
[1]	Carrying value includes $1.8 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
[2]	Carrying value includes $5.0 million of net unrealized gain which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Investment securities	'	'
Investment securities, fair value	$687,127	$528,458
Real Estate Owned, Valuation Allowance	$24,195	$36,873
Shareholders' equity:	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, authorized (in shares)	2,500,000,000	2,500,000,000
Common stock, shares issued (in shares)	73,163,275	72,415,346
Common stock, shares outstanding (in shares)	73,163,275	72,415,346
Treasury stock, shares at cost (in shares)	4,304,782	4,087,995

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (Unaudited) (USD $)	Total	Common Stock [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Shareholders' Equity [Member]	Non-Controlling Interest [Member]
In Thousands, except Share data
Balance, beginning of period at Dec. 31, 2010	$2,543,878	$4	$782,805	$1,743,880	($112,802)	$107,839	$2,521,726	$22,152
Balances (in shares) at Dec. 31, 2010	'	70,816,000	'	'	2,608,000	'	'	'
Net income	289,824	'	'	285,875	'	'	285,875	3,949
Other comprehensive income (loss)	21,140	'	'	'	'	21,140	21,140	'
Treasury stock purchases (in shares)	'	'	'	'	562,000	'	'	'
Treasury stock purchases	-26,446	'	'	'	-26,446	'	-26,446	'
Exercise of stock options (in shares)	'	717,000	'	'	210,000	'	'	'
Exercise of stock options	14,541	'	25,957	'	-11,416	'	14,541	'
Tax benefit on exercise of stock options	659	'	659	'	'	'	659	'
Stock-based compensation	9,396	'	9,396	'	'	'	9,396	'
Cash dividends on common stock	-76,423	'	'	-76,423	'	'	-76,423	'
Capital calls and distributions, net	10,083	'	'	'	'	'	'	10,083
Balance, end of period at Dec. 31, 2011	2,786,652	4	818,817	1,953,332	-150,664	128,979	2,750,468	36,184
Balances (in shares) at Dec. 31, 2011	'	71,533,000	'	'	3,380,000	'	'	'
Net income	354,124	'	'	351,191	'	'	351,191	2,933
Other comprehensive income (loss)	20,941	'	'	'	'	20,941	20,941	'
Treasury stock purchases (in shares)	'	'	'	'	384,000	'	'	'
Treasury stock purchases	-20,558	'	'	'	-20,558	'	-20,558	'
Exercise of stock options (in shares)	'	882,000	'	'	324,000	'	'	'
Exercise of stock options	14,650	'	32,311	'	-17,661	'	14,650	'
Tax benefit on exercise of stock options	120	'	120	'	'	'	120	'
Stock-based compensation	8,030	'	8,030	'	'	'	8,030	'
Cash dividends on common stock	-166,982	'	'	-166,982	'	'	-166,982	'
Acquisition of non-controlling interest	1,645	'	'	'	'	'	'	1,645
Capital calls and distributions, net	-4,941	'	'	'	'	'	'	-4,941
Balance, end of period at Dec. 31, 2012	2,993,681	4	859,278	2,137,541	-188,883	149,920	2,957,860	35,821
Balances (in shares) at Dec. 31, 2012	'	72,415,000	'	'	4,088,000	'	'	'
Net income	318,931	'	'	316,609	'	'	316,609	2,322
Other comprehensive income (loss)	-175,543	'	'	'	'	-175,543	-175,543	'
Treasury stock purchases (in shares)	'	'	'	'	0	'	'	'
Treasury stock purchases	0	'	'	'	0	'	0	'
Exercise of stock options (in shares)	'	748,000	'	'	217,000	'	'	'
Exercise of stock options	16,566	'	30,029	'	-13,463	'	16,566	'
Tax benefit on exercise of stock options	2,210	'	2,210	'	'	'	2,210	'
Stock-based compensation	7,069	'	7,069	'	'	'	7,069	'
Cash dividends on common stock	-104,722	'	'	-104,722	'	'	-104,722	'
Capital calls and distributions, net	-3,219	'	'	'	'	'	'	-3,219
Balance, end of period at Dec. 31, 2013	$3,054,973	$4	$898,586	$2,349,428	($202,346)	($25,623)	$3,020,049	$34,924
Balances (in shares) at Dec. 31, 2013	'	73,163,000	'	'	4,305,000	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash Flows From Operating Activities:	'	'	'
Net income	$318,931	$354,124	$289,824
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Provision for credit losses	-27,900	-22,000	-6,050
Change in fair value of mortgage servicing rights	-22,720	9,210	40,447
Net unrealized losses (gains) from derivatives	16,256	-984	-9,651
Tax benefit on exercise of stock options	-2,210	-120	-659
Change in bank-owned life insurance	-10,155	-11,089	-11,280
Stock-based compensation	7,069	8,030	9,396
Depreciation and amortization	53,261	54,935	49,967
Net amortization of securities discounts and premiums	62,274	87,769	112,227
Net realized losses (gains) on financial instruments and other assets	-12,586	-15,097	53,829
Net gain on mortgage loans held for sale	-84,403	-120,599	-57,418
Mortgage loans originated for resale	-4,081,390	-3,708,350	-2,293,436
Proceeds from sale of mortgage loans held for resale	4,254,151	3,731,830	2,369,895
Capitalized mortgage servicing rights	-49,431	-42,191	-26,251
Change in trading and fair value option securities	237,581	226,144	-247,386
Change in receivables	-3,122	9,244	24,236
Change in other assets	76,257	10,999	16,469
Change in accrued interest, taxes and expense	18,192	23,424	63,827
Change in other liabilities	-13,735	-3,729	-50,198
Net cash provided by operating activities	736,320	591,550	327,788
Cash Flows From Investing Activities:	'	'	'
Proceeds from maturities or redemptions of investment securities	143,445	111,511	68,020
Proceeds from maturities or redemptions of available for sale securities	2,650,045	4,456,363	3,650,900
Purchases of investment securities	-326,815	-172,327	-37,085
Purchases of available for sale securities	-4,287,146	-7,334,843	-7,504,261
Proceeds from sales of available for sale securities	2,436,093	1,744,662	2,725,760
Change in amount receivable on unsettled securities transactions	193,878	-135,901	59,908
Loans originated net of principal collected	-441,474	-1,077,075	-598,499
Net proceeds from (payments on) derivative asset contracts	59,390	-13,273	4,994
Acquisitions, net of cash acquired	-7,500	-23,615	0
Proceeds from disposition of assets	229,405	170,907	122,314
Purchases of assets	-212,292	-94,756	-56,195
Net cash provided by (used in) investing activities	437,029	-2,368,347	-1,564,144
Net Cash Provided by (Used in) Financing Activities [Abstract]	'	'	'
Net change in demand deposits, transaction deposits and savings accounts	-637,734	2,830,470	1,710,705
Net change in time deposits	-271,999	-413,990	-127,026
Net change in other borrowings	-111,905	210,607	-949,051
Repayment of subordinated debt	0	-53,705	0
Net payments or proceeds on derivaive liability contracts	-64,724	-7,560	15,674
Net change in derivative margin accounts	51,646	39,237	-102,262
Change in amount due on unsettled security transactions	-251,713	-355,918	492,946
Issuance of common and treasury stock, net	16,566	14,650	14,541
Sale of non-controlling interest	0	300	0
Tax benefit on exercise of stock options	2,210	120	659
Repurchase of common stock	0	-20,558	-26,446
Dividends paid	-104,722	-166,982	-76,423
Net cash provided by (used in) financing activities	-1,372,375	2,076,671	953,317
Net increase (decrease) in cash and cash equivalents	-199,026	299,874	-283,039
Cash and cash equivalents at beginning of period	1,286,239	986,365	1,269,404
Cash and cash equivalents at end of period	1,087,213	1,286,239	986,365
Cash paid for interest	69,830	90,137	122,166
Cash paid for taxes	132,176	158,703	156,465
Net loans transferred to real estate and other repossessed assets	86,868	133,502	87,476
Residential mortgage loans guaranteed by U.S. government agencies that became elgible fo repurchase during the year	127,572	121,432	154,134
Conveyance of other real estate owned guaranteed by U.S. government agencies	$43,901	$89,223	$14,501

Significant_Accounting_Policie

Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies [Text Block]	'
	1) Significant Accounting Policies
	Basis of Presentation
	The Consolidated Financial Statements of BOK Financial Corporation (“BOK Financial” or “the Company”) have been prepared in conformity with accounting principles generally accepted in the United States ("U.S. GAAP"), including interpretations of U.S. GAAP issued by federal banking regulators and general practices of the banking industry. The consolidated financial statements include the accounts of BOK Financial and its subsidiaries, principally BOKF, NA (“the Bank”), BOSC, Inc., The Milestone Group, Inc. and Cavanal Hill Investment Management, Inc. All significant intercompany transactions are eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year presentation.
	The consolidated financial statements include the assets, liabilities, non-controlling interests and results of operations of variable interest entities (“VIEs”) when BOK Financial is determined to be the primary beneficiary. Variable interest entities are generally defined as entities that either do not have sufficient equity to finance their activities without support from other parties or whose equity investors lack a controlling financial interest. See additional discussion of variable interest entities at Note 14 following.
	Nature of Operations
	BOK Financial, through its subsidiaries, provides a wide range of financial services to commercial and industrial customers, other financial institutions, municipalities, and consumers. These services include depository and cash management; lending and lease financing; mortgage banking; securities brokerage, trading and underwriting; and personal and corporate trust.
	The Bank operates as Bank of Oklahoma primarily in Tulsa and Oklahoma City metropolitan areas of the state of Oklahoma and Bank of Texas primarily in the Dallas, Fort Worth and Houston metropolitan areas of the state of Texas. In addition, the Bank does business as Bank of Albuquerque in Albuquerque, New Mexico; Colorado State Bank and Trust in Denver, Colorado; Bank of Arizona in Phoenix, Arizona; Bank of Kansas City in Kansas City, Missouri/Kansas and Bank of Arkansas in Northwest Arkansas. The Bank also operates the TransFund electronic funds network.
	Use of Estimates
	Preparation of BOK Financial's consolidated financial statements requires management to make estimates of future economic activities, including loan collectability, prepayments and cash flows from customer accounts. These estimates are based upon current conditions and information available to management. Actual results may differ significantly from these estimates.
	Acquisitions
	Assets and liabilities acquired, including identifiable intangible assets, are recorded at fair value on the acquisition date. The purchase price includes consideration paid at closing and the estimated fair value of contingent consideration that will be paid in the future, subject to achieving defined performance criteria. Goodwill is recognized as the excess of the purchase price over the net fair value of assets acquired and liabilities assumed. The Consolidated Statements of Earnings include the results of operations from the acquisition date.
	Goodwill and Intangible Assets
	Goodwill and intangible assets generally result from business combinations and are evaluated for each of BOK Financial's reporting units for impairment annually or more frequently if conditions indicate impairment. The evaluation of possible impairment of goodwill and intangible assets involves significant judgment based upon short-term and long-term projections of future performance.
	Reporting units are defined by the Company as the geographical market underlying each operating segment. This definition is consistent with the manner in which the chief operating decision maker assesses the performance of the Company and makes decisions concerning the allocation of resources. The Company qualitatively assesses whether it is more likely than not that the fair value of the reporting units are less than their carrying value. This assessment includes consideration of relevant events and circumstances including but not limited to macroeconomic conditions, industry and market conditions, the financial and stock performance of the Company and other relevant factors. Additional quantitative analysis may be undertaken through which the fair value of BOK Financial's reporting units is estimated by the discounted future earnings method. Income growth is projected for each reporting unit and a terminal value is computed. This projected income stream is converted to current fair value by using a discount rate that reflects a rate of return required by a willing buyer. Assumptions used to determine the fair value of the reporting units are compared to observable inputs, such as the market value of BOK Financial common stock. However, determination of the fair value of individual reporting units requires the use of significant unobservable inputs. There have been no changes in the techniques used to evaluate the carrying value of goodwill.
	Core deposit intangible assets are amortized using accelerated methods over the estimated lives of the acquired deposits. These assets generally have a weighted average life of 5 years. Other intangible assets are amortized using accelerated or straight-line methods, as appropriate, over the estimated benefit periods. These periods range from 5 years to 20 years. The net book values of identifiable intangible assets are evaluated for impairment when economic conditions indicate impairment may exist.
	Cash Equivalents
	Due from banks, funds sold (generally federal funds sold for one day), resell agreements (which generally mature within one to 30 days) and investments in money market funds are considered cash equivalents.
	Securities
	Securities are identified as trading, investment (held to maturity) or available for sale at the time of purchase based upon the intent of management, liquidity and capital requirements, regulatory limitations and other relevant factors. Trading securities, which are acquired for profit through resale, are carried at fair value with unrealized gains and losses included in current period earnings. Investment securities are carried at amortized cost. Amortization is computed by methods that approximate level yield and is adjusted for changes in prepayment estimates. Securities identified as available for sale are carried at fair value. Unrealized gains and losses are recorded, net of deferred income taxes, as accumulated other comprehensive income in shareholders' equity. Available for sale securities are separately identified as pledged to creditors if the creditor has the right to sell or re-pledge the collateral.
	The purchase or sale of securities is recognized on a trade date basis. Realized gains and losses on sales of securities are based upon specific identification of the security sold. A receivable or payable is recognized for subsequent transaction settlement. BOK Financial will periodically commit to purchase to-be-announced residential mortgage-backed securities. These commitments are carried at fair value if they are considered derivative contracts. Investment securities may be sold or transferred to trading or available for sale classification in certain limited circumstances specified in generally accepted accounting principles. Securities meeting certain criteria may also be transferred from the available for sale classification to the investment securities portfolio at fair value on the date of transfer. The unrealized gain or loss at the date of transfer is retained in accumulated other comprehensive income and in the carrying value of the investment securities portfolio. Such amounts are amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of the premium or accretion of the discount on the transferred securities.
	On a quarterly basis, the Company performs separate evaluations of impaired debt investment and available for sale securities and equity available for sale securities to determine if the decline in fair value below the amortized cost is other-than-temporary.
	For debt securities, management determines whether it intends to sell or if it is more likely than not that it will be required to sell impaired securities. This determination considers current and forecasted liquidity requirements and securities portfolio management. If the Company intends to sell or it is more likely than not that it will be required to sell the impaired debt security, a charge is recognized against earnings for the entire unrealized loss. For all impaired debt securities for which there is no intent or expected requirement to sell, the evaluation considers all available evidence to assess whether it is more likely than not that all amounts due would not be collected according to the security's contractual terms. Any expected credit loss due to the inability to collect all amounts due according to the security's contractual terms is recognized as a charge against earning. Any remaining unrealized loss related to other factors would be recognized in other comprehensive income, net of taxes.
	For equity securities, management evaluates various factors including cause, severity and duration of the decline in value of the security and prospects for recovery, as well as the Company's intent and ability not to sell the security until the fair value exceeds amortized cost. If an unrealized loss is determined to be other-than-temporary, a charge is recognized against earnings for the difference between the security's amortized cost and fair value.
	BOK Financial has elected to carry certain non-trading securities at fair value with changes in fair value recognized in current period income. These securities are held with the intent that gains or losses will offset changes in the fair value of mortgage servicing rights or certain derivative instruments.
	Restricted equity securities represents equity interests the Company is required to hold in the Federal Reserve Banks and Federal Home Loan Banks. Restricted equity securities are carried at cost as theses securities do not have a readily determined fair value because ownership of these shares are restricted and lacks a market.
	Derivative Instruments
	Derivative instruments may be used by the Company as part of its interest rate risk management programs or may be offered to customers. All derivative instruments are carried at fair value. The determination of fair value of derivative instruments considers changes in interest rates, commodity prices and foreign exchange rates. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customers or other counterparties reduces the fair value of asset contracts. Deterioration of our credit rating to below investment grade or the credit ratings of other counterparties could decrease the fair value of our derivative liabilities. Changes in fair value are generally reported in income as they occur.
	Derivative instruments used to manage interest rate risk consist primarily of interest rate swaps. These contracts modify the interest income or expense of certain assets or liabilities. Amounts receivable from or payable to counterparties are reported in interest income or expense using the accrual method. Changes in fair value of interest rate swaps are reported in other operating revenue - gain (loss) on derivatives, net.
	In certain circumstances, an interest rate swap may be designated as a fair value hedge and may qualify for hedge accounting. In these circumstances, changes in the full fair value of the hedged asset or liability, not only changes in fair value due to changes in the benchmark interest rate, is also recognized in earnings and may partially or completely offset changes in fair value of the interest rate swap. A fair value hedge is considered effective if the cumulative fair value adjustment of the interest rate swap is within a range of 80% to 120% of the cumulative change in the fair value of the hedged asset or liability. Any ineffectiveness, including ineffectiveness due to credit risk or ineffectiveness created when the fixed rate of the hedged asset or liability does not match the fixed rate of the interest rate swap, is recognized in earnings and reported in Gain (loss) on derivatives, net.
	Interest rate swaps may be designated as cash flow hedges of variable rate assets or liabilities, or of anticipated transactions. Changes in the fair value of interest rate swaps designated as cash flow hedges are recorded in accumulated other comprehensive income to the extent they are effective. The amount recorded in other comprehensive income is reclassified to earnings in the same periods as the hedged cash flows impact earnings. The ineffective portion of changes in fair value is reported in current earnings.
	If a derivative instrument that had been designated as a fair value hedge is terminated or if the hedge designation is removed or deemed to no longer be effective, the difference between the hedged items carrying value and its face amount is recognized into income over the remaining original hedge period. Similarly, if a derivative instrument that had been designated as a cash flow hedge is terminated or if the hedge designation is removed or deemed to no longer be effective, the amount remaining in accumulated other comprehensive income is reclassified to earnings in the same period as the hedged item.
	BOK Financial offers programs that permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchanges rates with derivative contracts. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize market risk from changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in other operating revenue - brokerage and trading revenue in the Consolidated Statements of Earnings.
	When bilateral netting agreements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by counterparty basis.
	Derivative contracts may also require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met.
	Loans
	Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's financial difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential loans guaranteed by U.S. government agencies, are as follows.
	Interest is accrued at the applicable interest rate on the outstanding principal amount. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when 90 days or more past due or within 60 days of being notified of the borrower bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Payments received on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance.
	Loans to borrowers experiencing financial difficulties may be modified in troubled debt restructurings ("TDRs"). All TDRs are classified as nonaccruing. Modifications generally consist of extension of payment terms or interest rate concessions and may result either voluntarily through negotiations with the borrower or involuntarily through court order. Generally, principal and accrued but unpaid interest is not voluntarily forgiven.
	Performing loans may be renewed under then current collateral, debt service ratio and other underwriting standards. Nonaccruing loans may also be renewed and will remain classified as nonaccruing.
	All loans are charged-off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a TDR. The charge-off amount is determined through an evaluation of available cash resources and collateral value. Internally risk graded loans are evaluated quarterly and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status.
	Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable.
	Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company has the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheet. Guaranteed loans are considered to be impaired because we do not expect to receive all principal and interest based on the loan's contractual terms. The principal balance continues to be guaranteed, however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in TDRs in accordance with U.S. government agency guidelines. Interest continues to accrue at the modified rate. U.S. government guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.
	Allowance for Loan Losses and Accrual for Off-Balance Sheet Credit Risk
	The appropriateness of the allowance for loan losses and accrual for off-balance sheet credit risk (collectively "Allowance for Credit Losses") is assessed by management based on an ongoing quarterly evaluation of the probable estimated losses inherent in the portfolio, including probable losses on outstanding loans and unused commitments to provide financing.
	Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its Allowance for Credits Losses. Classes are based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk.
	The allowance for loan losses consists of specific allowances attributed to impaired loans that have not yet been charged down to amounts we expect to recover, general allowances based on estimated loss rates by loan class and nonspecific allowances based on factors that affect more than one portfolio segment. In the fourth quarter of 2011, the Company enhanced its methodology for estimating general allowances by establishing specific loss rates for each loan class. There were no changes to the methodology for estimating general allowances during 2013 or 2012.
	Loans are considered to be impaired when it becomes probable that BOK Financial will be unable to collect all amounts due according to the contractual terms of the loan agreements. Internally risk graded loans are evaluated individually for impairment. Substantially all commercial and commercial real estate loans and certain residential mortgage and consumer loans are risk graded based on a quarterly evaluation of the borrowers' ability to repay.  Certain commercial loans and most residential mortgage and consumer loans are small balance, homogeneous pools of loans that are not risk graded. Non-risk graded loans are identified as impaired based on performance status. Generally, non-risk graded loans 90 days or more past due, modified in a troubled debt restructuring or in bankruptcy are considered to be impaired.
	Specific allowances for impaired loans are measured by an evaluation of estimated future cash flows discounted at the loans' initial effective interest rate or the fair value of collateral for certain collateral dependent loans. The fair value of real property held as collateral is generally based on third party appraisals that conform to Uniform Standards of Professional Appraisal Practice, less estimated selling costs. Appraised values are on an “as-is” basis and generally are not adjusted by the Company. Updated appraisals are obtained at least annually or more frequently if market conditions indicate collateral values may have declined. Collateral value of mineral rights is generally determined by our internal staff of engineers based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. The value of other collateral is generally determined by our special assets staff based on projected liquidation cash flows under current market conditions. Collateral values and available cash resources that support impaired loans are evaluated quarterly. Historical statistics may be used as a practical way to estimate impairment in limited situations, such as when a collateral dependent loan is identified as impaired at the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed. Estimates of future cash flows and collateral values require significant judgments and may be volatile.
	General allowances for unimpaired loans are based on an estimated loss rate by loan class. The appropriate historical gross loss rate for each loan class is determined by the greater of the current loss rate based on the most recent twelve months or a ten-year average gross loss rate. Recoveries are not directly considered in the estimation of historical loss rates. Recoveries generally do not follow predictable patterns and are not received until well-after the charge-off date as a result of protracted legal actions. For risk graded loans, historical gross loss rates are adjusted for changes in risk grading. For each loan class, the current weighted average risk grade is compared to the the long-term weighted average risk grade. This comparison determines whether credit risk in each loan class is increasing or decreasing. Historical loss rates are adjusted upward or downward in proportion to changes in average risk grading. General allowances for unimpaired loans also consider inherent risks identified for each loan class. Inherent risks consider loss rates that most appropriately represent the current credit cycle and other factors attributable to a specific loan class which have not yet been represented in the historical gross loss rates or risk grading. These factors include changes in commodity prices or engineering imprecision which may affect the value of reserves that secure our energy loan portfolio, construction risk that may affect commercial real estate loans, changes in regulations and public policy that may disproportionately impact health care loans and changes in loan products.
	Nonspecific allowances are maintained for risks beyond factors specific to a particular portfolio segment or loan class. These factors include trends in the economy in our primary lending areas, concentration in large-balance loans and other relevant factors.
	An accrual for off-balance sheet credit risk is included in Other liabilities. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses.
	A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received.
	Transfers of Financial Assets
	BOK Financial transfers financial assets as part of its mortgage banking activities and periodically may transfer other financial assets. Transfers are recorded as sales when the criteria for surrender of control are met. Certain residential mortgage loans originated by the Company are held for sale and are carried at fair value based on sales commitments or market quotes and are reported separately in the Consolidated Balance Sheets. Changes in fair value are recorded in other operating revenue – mortgage banking revenue in the Consolidated Statements of Earnings.
	BOK Financial retains a repurchase obligation under underwriting representations and warranties related to residential mortgage loans transferred and generally retains the right to service the loans. The Company may incur a recourse obligation in limited circumstances. Separate accruals are recognized in Other liabilities in the Consolidated Balance Sheets for repurchase and recourse obligations.
	The Company may also retain a residual interest in excess cash flows generated by the assets. All assets obtained, including cash, servicing rights and residual interests, and all liabilities incurred, including recourse obligations, are initially recognized at fair value, all assets transferred are derecognized and any gain or loss on the sale is recognized in earnings. Subsequently, servicing rights and residual interests are carried at fair value with changes in fair value recognized in earnings as they occur.
	Real Estate and Other Repossessed Assets
	Real estate and other repossessed assets are acquired in partial or total forgiveness of loans. These assets are carried at the lower of cost, which is determined by fair value at date of foreclosure less estimated disposal costs, or current fair value less estimated disposal costs. Decreases in fair value below cost are recognized as asset-specific valuation allowances which may be reversed when supported by future increases in fair value. Fair values of real estate are based on “as is” appraisals which are updated at least annually or more frequently for certain asset types or assets located in certain distressed markets. Fair values based on appraisals are generally considered to be based on significant other observable inputs. The Company also considers decreases in listing price and other relevant information in quarterly evaluations and reduces the carrying value of real estate and other repossessed assets when necessary. Fair values based on list prices and other relevant information are generally considered to be based on significant unobservable inputs. Additional costs incurred to complete real estate and other repossessed assets may increase the carrying value, up to current fair value based on “as completed” appraisals. The fair value of mineral rights included in repossessed assets are generally determined by our internal staff of engineers based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. The value of other repossessed assets is generally determined by our special assets staff based on projected liquidation cash flows under current market conditions. Income generated by these assets is recognized as received. Operating expenses are recognized as incurred. Gains or losses on sales of real estate and other repossessed assets are based on the cash proceeds received less the cost basis of the asset, net of any valuation allowances.
	Premises and Equipment
	Premises and equipment are carried at cost, including capitalized interest when appropriate, less accumulated depreciation and amortization. Depreciation and amortization are computed on a straight-line basis over the estimated useful lives of the assets or, for leasehold improvements, over the shorter of the estimated useful lives or remaining lease terms. Useful lives range from 5 years to 40 years for buildings and improvements, 3 years to 10 years for software and 3 years to 10 years for furniture and equipment. Construction in progress represents construction and systems projects underway that have not yet been placed into service. Depreciation and amortization begin once the assets are placed into service. Repair and maintenance costs are charged to expense as incurred.
	Premises no longer used by the Company are transferred to real estate and other repossessed assets. The transferred amount is the lower of cost less accumulated depreciation or fair value less estimated disposal costs as of the transfer date.
	Rent expense for leased premises is recognized as incurred over the lease term. The effects of rent holidays, significant rent escalations and other adjustments to rent payments are recognized on a straight-line basis over the lease term.
	Mortgage Servicing Rights
Mortgage servicing rights may be purchased or may be recognized when mortgage loans are originated pursuant to an existing plan for sale or, if no such plan exists, when the mortgage loans are sold. All mortgage servicing rights are carried at fair value. Changes in the fair value are recognized in earnings as they occur.
There is no active market for trading in mortgage servicing rights after origination. A cash flow model is used to determine fair value. Key assumptions and estimates, including projected prepayment speeds and assumed servicing costs, earnings on escrow deposits, ancillary income and discount rates, used by this model are based on current market sources. Assumptions used to value mortgage servicing rights are considered significant unobservable inputs. A separate third party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated daily for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial's servicing portfolio. Fair value estimates from outside sources are received at least annually to corroborate the results of the valuation model.
Federal and State Income Taxes
BOK Financial and its subsidiaries file consolidated tax returns. The subsidiaries provide for income taxes on a separate return basis and remit to BOK Financial amounts determined to be currently payable. BOK Financial is agent for its subsidiaries under the Company's tax sharing agreements and has no ownership rights to any refunds received for the benefit of its subsidiaries.
Current income tax expense or benefit is based on an evaluation that considers estimated taxable income, tax credits, and statutory federal and state income tax rates.  The amount of current income tax expense or benefit recognized in any period may differ from amounts reported to taxing authorities. Annually, tax returns are filed with each jurisdiction where they Company conducts business and recognized current income tax expense or benefit is adjusted to the filed tax returns.
Deferred tax assets and liabilities are based upon the differences between the values of assets and liabilities as recognized in the financial statements and their related tax basis using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled. A valuation allowance is provided when it is more likely than not that some portion of the entire deferred tax asset may not be realized based on taxes previously paid in net loss carry-back periods and other factors.
BOK Financial has unrecognized tax benefits, which are included in accrued current income taxes payable, for the uncertain portion of recorded tax benefits and related interest. These uncertainties result from the application of complex tax laws, rules, regulations and interpretations, primarily in state taxing jurisdictions. Unrecognized tax benefits are assessed quarterly and may be adjusted through current income tax expense in future periods based on changing facts and circumstances, completion of examinations by taxing authorities or expiration of a statute of limitations. Estimated penalties and interest on uncertain tax positions are recognized in income tax expense.
Employee Benefit Plans
BOK Financial sponsors a defined benefit cash balance pension plan (“Pension Plan”), qualified profit sharing plan (“Thrift Plan”) and employee health care plans. Pension Plan costs, which are based upon actuarial computations of current costs, are expensed annually. Unrecognized prior service cost and net gains or losses are amortized on a straight-line basis over the lesser of the average remaining service periods of the participants or 4 years. Employer contributions to the Pension Plan are in accordance with Federal income tax regulations. Pension Plan benefits were curtailed as of April 1, 2006. No participants may be added to the Pension Plan and no additional service benefits will be accrued.
BOK Financial recognizes the funded status of its employee benefit plans. For a pension plan, the funded status is the difference between the fair value of plan assets and the projected benefit obligation measured as of the fiscal year-end date. Adjustments required to recognize the Pension Plan's net funded status are made through accumulated other comprehensive income, net of deferred income taxes.
Employer contributions to the Thrift Plan, which matches employee contributions subject to percentage and years of service limits, are expensed when incurred. BOK Financial recognizes the expense of health care benefits on the accrual method.
Stock Compensation Plans
BOK Financial awards stock options and non-vested common shares as compensation to certain officers. Grant date fair value of stock options is based on the Black-Scholes option pricing model. Stock options generally have graded vesting over 7 years. Each tranche is considered a separate award for valuation and compensation cost recognition. Grant date fair value of non-vested shares is based on the current market value of BOK Financial common stock. Non-vested shares awarded prior to 2013 generally cliff vest in 5 years. Non-vested shares awarded in January 2013 generally cliff vest in 3 years and are subject to a two year holding period after vesting.
Compensation cost is recognized as expense over the service period, which is generally the vesting period. Expense is reduced for estimated forfeitures over the vesting period and adjusted for actual forfeitures as they occur. Stock-based compensation awarded to certain officers has performance conditions that affect the number of awards granted. Compensation cost is adjusted based on the probable outcome of the performance conditions. Excess tax benefits from share-based payments recognized in capital surplus are determined by the excess of tax benefits recognized over the tax effect of compensation cost recognized.
Certain executive officers may defer the recognition of income from stock-based compensation for income tax purposes and to diversify the deferred income into alternative investments. Stock-based compensation granted to these officers is considered liability awards. Changes in the fair value of liability awards are recognized as compensation expense in the period of the change.
Other Operating Revenue
Fees and commission revenue is recognized at the time the related services are provided or products are sold and may be accrued when necessary. Accrued fees and commissions are reversed against revenue if amounts are subsequently deemed to be uncollectible. Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and on a net basis whenever we act as a broker for products or services of others.
Brokerage and trading revenue includes changes in the fair value of securities held for trading purposes and derivatives held for customer risk management programs, including credit losses on trading securities and derivatives, commissions earned from the retail sale of securities, mutual funds and other financial instruments, and underwriting and financial advisory fees.
Transaction card revenue includes merchant discounts fees, electronic funds transfer network fees and check card fees. Merchant discount fees represent fees paid by customers for account management and electronic processing of transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.
Trust fees and commissions include revenue from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided.
Deposit service charges and fees are recognized at least quarterly in accordance with published deposit account agreement and disclosure statement for retail accounts or contractual agreement for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances.
Newly Adopted and Pending Accounting Pronouncements
Financial Accounting Standards Board ("FASB")
FASB Accounting Standards Update No. 2011-11, Disclosures About Offsetting Assets and Liabilities (“ASU 2011-11”)
On December 16, 2011, the FASB issued ASU 2011-11 which contains new disclosure requirements regarding the nature of an entity's right of setoff and related arrangements associated with its financial instruments and derivative instruments. The new disclosures are anticipated to facilitate comparison between financial statements prepared under generally accepted accounting principles in the United States of America and International Financial Reporting Standards by providing information about both gross and net exposures. The new disclosure requirements were effective for interim and annual reporting periods beginning on or after January 1, 2013.
FASB Accounting Standards Update No. 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities (ASU 2013-01)
On January 31, 2013, FASB issued ASU 2013-01 which clarified that the scope of ASU 2011-11 applied for derivative contracts accounted for in accordance with Topic 815, Derivative and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and securities borrowing and securities lending transaction that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. ASU 2013-01 was effective for the Company on January 1, 2013.
FASB Accounting Standards Update No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income ("ASU 2013-02")
On February 7, 2013 the FASB issued ASU 2013-02 which sets the requirements for presentation of significant reclassifications out of accumulated other comprehensive income for both items reclassified in their entirety and the respective line items in Statement of Earnings they are being reclassified into and for other amounts that are not reclassified in their entirety to net income during the reporting period, such as items being reclassified to balance sheet accounts. ASU 2013-02 was effective for the Company on January 1, 2013 and is to be applied prospectively.
FASB Accounting Standards Update No. 2013-08, Financial Services – Investment Companies (Topic 946): Amendments to the Scope, Measurement, and Disclosure Requirements (ASU 2013-08)
On June 7, 2013, the FASB issued ASU 2013-08 which amends the criteria an entity would need to meet to qualify as an investment company under ASC 946, Financial Services - Investment Companies. ASU 2013-08 also provides additional implementation guidance for the assessment and requires additional disclosures. ASU 2013-08 is effective prospectively during interim and annual periods beginning after December 15, 2013, with early adoption prohibited. The adoption of ASU 2013-08 is not expected to have a material impact on the Company's consolidated financial statements.
FASB Accounting Standards Update No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects (ASU 2014-01)
On January 15, 2014, the FASB issued ASU 2014-01 to simplify the amortization method an entity uses and modify the criteria to elect a measurement and presentation alternative, including the simplified amortization method, for certain investments in qualified affordable housing projects. This alternative permits the entity to present the investment's performance net of the related tax benefits as part of income tax expense. ASU 2014-01 is effective for the Company for interim and annual periods beginning after December 15, 2014. Early adoption is permitted. Adoption of ASU 2014-01 may affect income statement presentation, but otherwise is not expected to have a material impact on the Company's consolidated financial statements.
FASB Accounting Standards Update No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure
On January 17, 2014, the FASB issued ASU 2014-04 to clarify when an entity is considered to have obtained physical possession (from an in-substance possession or foreclosure) of a residential real estate property collateralizing a mortgage loan. Upon physical possession of such real property, an entity is required to reclassify the nonperforming mortgage loan to other real estate owned. ASU is effective for the Company for interim and annual periods beginning after December 15, 2014. Early adoption is permitted. Adoption of ASU 2014-04 is not expected to have a material impact on the Company's consolidated financial statements.

Securities

Securities	12 Months Ended
	Dec. 31, 2013
Marketable Securities [Abstract]	'
Securities [Text Block]	'
	(2) Securities
	Trading Securities
	The fair value and net unrealized gain (loss) included in trading securities is as follows (in thousands):
			December 31, 2013								December 31, 2012
			Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain (Loss)
	U.S. Government agency debentures		$	34,120			$	77			$	16,545			$	(57	)
	U.S. agency residential mortgage-backed securities		21,011				123				86,361				447
	Municipal and other tax-exempt securities		27,350				(182		)		90,326				(226		)
	Other trading securities		9,135				(7		)		20,870				(13		)
	Total		$	91,616			$	11			$	214,102			$	151
	Investment Securities
	The amortized cost and fair values of investment securities are as follows (in thousands):
			December 31, 2013
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	440,187			$	440,187			$	439,870			$	2,452			$	(2,769	)
	U.S. agency residential mortgage-backed securities – Other		48,351				50,182				51,864				1,738				(56		)
	Other debt securities		187,509				187,509				195,393				8,497				(613		)
	Total		$	676,047			$	677,878			$	687,127			$	12,687			$	(3,438	)
	1	Carrying value includes $1.8 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
	2	Gross unrealized gains and losses are not recognized in AOCI in the Consolidated Balance Sheets.
			December 31, 2012
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	232,700			$	232,700			$	235,940			$	3,723			$	(483	)
	U.S. agency residential mortgage-backed securities – Other		77,726				82,767				85,943				3,176				—
	Other debt securities		184,067				184,067				206,575				22,528				(20		)
	Total		$	494,493			$	499,534			$	528,458			$	29,427			$	(503	)
	1	Carrying value includes $5.0 million of net unrealized gain which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
	2	Gross unrealized gains and losses are not recognized in AOCI in the Consolidated Balance Sheets.
	In 2011, the Company transferred certain U.S. government agency residential mortgage-backed securities from the available for sale portfolio to the investment securities (held-to-maturity) portfolio as the Company has the positive intent and ability to hold these securities to maturity. No gains or losses were recognized in the Consolidated Statement of Earnings at the time of the transfer. Transfers of debt securities into the investment securities portfolio (held-to-maturity) are made at fair value at the date of transfer. The unrealized holding gain or loss at the date of transfer is retained in Accumulated Other Comprehensive Income and in the carrying value of the investment securities portfolio. Such amounts are amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of the premium or accretion of the discount on the transferred securities. At the time of transfer, the fair value totaled $131 million, amortized cost totaled $118 million and the pretax unrealized gain totaled $13 million.
	The amortized cost and fair values of investment securities at December 31, 2013, by contractual maturity, are as shown in the following table (dollars in thousands):
			Less than				One to				Six to				Over				Total				Weighted
			One Year				Five Years				Ten Years				Ten Years								Average
																							Maturity²
	Municipal and other tax-exempt:
	Carrying value		$	33,821			$	308,451			$	57,873			$	40,042			$	440,187			4.43
	Fair value		33,996				308,701				57,168				40,005				439,870
	Nominal yield¹		2.91		%		1.66		%		2.65		%		4.75		%		2.23		%
	Other debt securities:
	Carrying value		$	9,138			$	33,043			$	44,539			$	100,789			$	187,509			8.63
	Fair value		9,140				33,269				44,686				108,298				195,393
	Nominal yield		4.08		%		5.02		%		5.27		%		6.27		%		5.71		%
	Total fixed maturity securities:
	Carrying value		$	42,959			$	341,494			$	102,412			$	140,831			$	627,696			5.69
	Fair value		43,136				341,970				101,854				148,303				635,263
	Nominal yield		3.16		%		1.98		%		3.79		%		5.84		%		3.27		%
	Residential mortgage-backed securities:
	Carrying value																		$	50,182			³
	Fair value																		51,864
	Nominal yield4																		2.73		%
	Total investment securities:
	Carrying value																		$	677,878
	Fair value																		687,127
	Nominal yield																		3.23		%
	1.	Calculated on a taxable equivalent basis using a 39% effective tax rate.
	2.	Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.
	3.	The average expected lives of residential mortgage-backed securities were 3.1 years based upon current prepayment assumptions.
	4.	The nominal yield on residential mortgage-backed securities is based upon prepayment assumptions at the purchase date. Actual yields earned may differ significantly based upon actual prepayments. See Quarterly Financial Summary - Unaudited for current yields on the investment securities portfolio.
	Available for Sale Securities
	The amortized cost and fair value of available for sale securities are as follows (in thousands):
			December 31, 2013
			Amortized				Fair				Gross Unrealized1
		Cost				Value				Gain				Loss				OTTI²
U.S. Treasury		$	1,042			$	1,042			$	—			$	—			$	—
Municipal and other tax-exempt		73,232				73,775				1,606				(1,063		)		—
Residential mortgage-backed securities:
U. S. government agencies:
FNMA		4,224,327				4,232,332				68,154				(60,149		)		—
FHLMC		2,308,341				2,293,943				25,813				(40,211		)		—
GNMA		1,151,225				1,152,128				9,435				(8,532		)		—
Other		36,296				37,607				1,311				—				—
Total U.S. government agencies		7,720,189				7,716,010				104,713				(108,892		)		—
Private issue:
Alt-A loans		104,559				107,212				4,386				—				(1,733		)
Jumbo-A loans		109,622				113,887				4,974				—				(709		)
Total private issue		214,181				221,099				9,360				—				(2,442		)
Total residential mortgage-backed securities		7,934,370				7,937,109				114,073				(108,892		)		(2,442		)
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,100,146				2,055,804				1,042				(45,384		)		—
Other debt securities		35,061				35,241				368				(188		)		—
Perpetual preferred stock		22,171				22,863				705				(13		)		—
Equity securities and mutual funds		19,069				21,328				2,326				(67		)		—
Total		$	10,185,091			$	10,147,162			$	120,120			$	(155,607	)		$	(2,442	)
1 Gross unrealized gain/loss recognized in AOCI in the consolidated balance sheet.
2 Amounts represent unrealized loss that remains in AOCI after an other-than-temporary credit loss has been recognized in income.
		December 31, 2012
		Amortized				Fair				Gross Unrealized¹
		Cost				Value				Gain				Loss				OTTI²
U.S. Treasury		$	1,000			$	1,002			$	2			$	—			$	—
Municipal and other tax-exempt		84,892				87,142				2,414				(164		)		—
Residential mortgage-backed securities:
U. S. government agencies:
FNMA		5,308,463				5,453,549				146,247				(1,161		)		—
FHLMC		2,978,608				3,045,564				66,956				—				—
GNMA		1,215,554				1,237,041				21,487				—				—
Other		148,025				153,667				5,642				—				—
Total U.S. government agencies		9,650,650				9,889,821				240,332				(1,161		)		—
Private issue:
Alt-A loans		124,314				123,174				1,440				—				(2,580		)
Jumbo-A loans		198,588				201,989				5,138				(134		)		(1,603		)
Total private issue		322,902				325,163				6,578				(134		)		(4,183		)
Total residential mortgage-backed securities		9,973,552				10,214,984				246,910				(1,295		)		(4,183		)
Commercial mortgage-backed securities guaranteed by U.S. government agencies		890,746				895,075				5,006				(677		)		—
Other debt securities		35,680				36,389				709				—				—
Perpetual preferred stock		22,171				25,072				2,901				—				—
Equity securities and mutual funds		24,593				27,557				3,242				(278		)		—
Total		$	11,032,634			$	11,287,221			$	261,184			$	(2,414	)		$	(4,183	)
1 Gross unrealized gain/loss recognized in AOCI in the consolidated balance sheet
2 Amounts represent unrealized loss that remains in AOCI after an other-than-temporary credit loss has been recognized in income.
The amortized cost and fair values of available for sale securities at December 31, 2013, by contractual maturity, are as shown in the following table (dollars in thousands):
	Less than				One to				Six to				Over				Total				Weighted
	One Year				Five Years				Ten Years				Ten Years6								Average
																					Maturity5
U.S. Treasuries:
Amortized cost	$	1,042			$	—			$	—			$	—			$	1,042			1.16
Fair value	1,042				—				—				—				1,042
Nominal yield	0.24		%		—		%		—		%		—		%		0.24		%
Municipal and other tax-exempt:
Amortized cost	1,856				36,183				3,239				31,954				73,232				10.48
Fair value	1,882				37,470				3,451				30,972				73,775
Nominal yield¹	6.35		%		3.84		%		6.34		%		5.41		%		4.7		%
Commercial mortgage-backed securities:
Amortized cost	—				626,327				1,104,095				369,724				2,100,146				9.41
Fair value	—				619,219				1,073,471				363,114				2,055,804
Nominal yield	—		%		1.22		%		1.43		%		1.25		%		1.34		%
Other debt securities:
Amortized cost	24,992				5,169				—				4,900				35,061				5.31
Fair value	25,270				5,259				—				4,712				35,241
Nominal yield	1.74		%		2.12		%		—		%		1.54		%		1.77		%
Total fixed maturity securities:
Amortized cost	$	27,890			$	667,679			$	1,107,334			$	406,578			$	2,209,481			9.38
Fair value	28,194				661,948				1,076,922				398,798				2,165,862
Nominal yield	2.05		%		1.37		%		1.44		%		1.58		%		1.45		%
Residential mortgage-backed securities:
Amortized cost																	$	7,934,370			2
Fair value																	7,937,109
Nominal yield4																	1.9		%
Equity securities and mutual funds:
Amortized cost																	$	41,240			³
Fair value																	44,191
Nominal yield																	1.33		%
Total available-for-sale securities:
Amortized cost																	$	10,185,091
Fair value																	10,147,162
Nominal yield																	1.8		%
1	Calculated on a taxable equivalent basis using a 39% effective tax rate.
2	The average expected lives of mortgage-backed securities were 3.3 years based upon current prepayment assumptions.
3	Primarily common stock and preferred stock of corporate issuers with no stated maturity.
4	The nominal yield on mortgage-backed securities is based upon prepayment assumptions at the purchase date. Actual yields earned may differ significantly based upon actual prepayments. See Quarterly Financial Summary –– Unaudited following for current yields on available for sale securities portfolio.
5	Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.
6	Nominal yield on municipal and other tax-exempt securities and other debt securities with contractual maturity dates over ten years are based on variable rates which generally are reset within 35 days.
Sales of available for sale securities resulted in gains and losses as follows (in thousands):
	Year Ended December 31,
	2013				2012				2011
Proceeds	$	2,436,093			$	1,744,662			2,725,760
Gross realized gains	25,711				41,191				41,284
Gross realized losses	(14,991		)		(7,346		)		(7,140	)
Related federal and state income tax expense	4,170				13,166				13,282
A summary of investment and available for sale securities that have been pledged as collateral for repurchase agreements, public trust funds on deposit and for other purposes, as required by law was as follows (in thousands):
	December 31,
	2013				2012
Investment:
Carrying value	$	89,087			$	117,346
Fair value	91,804				121,647
Available for sale:
Amortized cost	5,171,782				4,070,250
Fair value	5,133,530				4,186,390
The secured parties do not have the right to sell or re-pledge these securities. At December 31, 2012, municipal trading securities with a fair value of $13 million were pledged as collateral on a line of credit for the trading activities of BOSC, Inc. Under the terms of the credit agreement, the creditor has the right to sell or repledge the collateral. No trading securities were pledged as collateral as of December 31, 2013.
Temporarily Impaired Securities as of December 31, 2013
(in thousands):
		Number of Securities			Less Than 12 Months								12 Months or Longer								Total
					Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
					Value				Loss				Value				Loss				Value				Loss
Investment:
Municipal and other tax-exempt		107			$	166,382			$	1,921			$	53,073			$	848			$	219,455			$	2,769
U.S. Agency residential mortgage-backed securities – Other		2			15,224				56				—				—				15,224				56
Other debt securities		30			10,932				549				777				64				11,709				613
Total investment		139			$	192,538			$	2,526			$	53,850			$	912			$	246,388			$	3,438
		Number of Securities			Less Than 12 Months								12 Months or Longer								Total
					Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
					Value				Loss				Value				Loss				Value				Loss
Available for sale:
Municipal and other tax-exempt		27			$	13,286			$	245			$	17,805			$	818			$	31,091			$	1,063
Residential mortgage-backed securities:
U. S. agencies:
FNMA		81			2,281,491				60,149				—				—				2,281,491				60,149
FHLMC		50			1,450,588				40,211				—				—				1,450,588				40,211
GNMA		27			647,058				8,532				—				—				647,058				8,532
Total U.S. agencies		158			4,379,137				108,892				—				—				4,379,137				108,892
Private issue1:
Alt-A loans		7			11,043				756				30,774				977				41,817				1,733
Jumbo-A loans		9			14,642				709				—				—				14,642				709
Total private issue		16			25,685				1,465				30,774				977				56,459				2,442
Total residential mortgage-backed securities		174			4,404,822				110,357				30,774				977				4,435,596				111,334
Commercial mortgage-backed securities guaranteed by U.S. government agencies		123			1,800,717				45,302				2,286				82				1,803,003				45,384
Other debt securities		3			4,712				188				—				—				4,712				188
Perpetual preferred stocks		1			4,988				13				—				—				4,988				13
Equity securities and mutual   funds		118			2,070				67				—				—				2,070				67
Total available for sale		446			$	6,230,595			$	156,172			$	50,865			$	1,877			$	6,281,460			$	158,049
1Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:
Alt-A loans		7			11,043			756			30,774			977			41,817			1,733
Jumbo-A loans		9			14,642			709			—			—			14,642			709
Temporarily Impaired Securities as of December 31, 2012
(In thousands)
		Number of Securities			Less Than 12 Months								12 Months or Longer								Total
					Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
					Value				Loss				Value				Loss				Value				Loss
Investment:
Municipal and other tax- exempt		53			$	92,768			$	483			$	—			$	—			$	92,768			$	483
U.S. Agency residential mortgage-backed securities – Other		—			—				—				—				—				—				—
Other debt securities		14			881				20				—				—				881				20
Total investment		67			$	93,649			$	503			$	—			$	—			$	93,649			$	503
		Number of Securities			Less Than 12 Months								12 Months or Longer								Total
					Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
					Value				Loss				Value				Loss				Value				Loss
Available for sale:
Municipal and other tax-exempt		38			$	6,150			$	11			$	26,108			$	153			$	32,258			$	164
Residential mortgage-backed securities:
U. S. agencies:
FNMA		12			161,828				1,161				—				—				161,828				1,161
FHLMC		—			—				—				—				—				—				—
GNMA		—			—				—				—				—				—				—
Total U.S. agencies		12			161,828				1,161				—				—				161,828				1,161
Private issue1:
Alt-A loans		12			—				—				87,907				2,580				87,907				2,580
Jumbo-A loans		11			—				—				43,252				1,737				43,252				1,737
Total private issue		23			—				—				131,159				4,317				131,159				4,317
Total residential mortgage-backed securities		35			161,828				1,161				131,159				4,317				292,987				5,478
Commercial mortgage-backed securities guaranteed by U.S. government agencies		8			275,065				677				—				—				275,065				677
Other debt securities		3			4,899				—				—				—				4,899				—
Perpetual preferred stocks		—			—				—				—				—				—				—
Equity securities and mutual funds		22			202				1				2,161				277				2,363				278
Total available for sale		106			$	448,144			$	1,850			$	159,428			$	4,747			$	607,572			$	6,597
1	Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:
Alt-A loans		12			$	—			$	—			$	87,907			$	2,580			$	87,907			$	2,580
Jumbo-A loans		10			—				—				29,128				1,602				29,128				1,602
On a quarterly basis, the Company performs separate evaluations of impaired debt and equity investments and available for sale securities to determine if the unrealized losses are temporary.
For debt securities, management determines whether it intends to sell or if it is more-likely-than-not that it will be required to sell impaired securities. This determination considers current and forecasted liquidity requirements, regulatory and capital requirements and securities portfolio management. Based on this evaluation as of December 31, 2013, we do not intend to sell any impaired available for sale securities before fair value recovers to our current amortized cost and it is more-likely-than-not that we will not be required to sell impaired securities before fair value recovers, which may be maturity.
Impairment of debt securities rated investment grade by all nationally-recognized rating agencies is considered temporary unless specific contrary information is identified. None of the debt securities rated investment grade were considered to be other-than-temporarily impaired at December 31, 2013.
At December 31, 2013, the composition of the Company’s investment and available for sale securities portfolios by the lowest current credit rating assigned by any of the three nationally-recognized rating agencies is as follows (in thousands):
										AAA - AA
		U.S. Govt/GSE 1																A - BBB								Below Investment Grade				Not Rated				Total
		Carrying				Fair				Carrying				Fair				Carrying				Fair				Carrying		Fair		Carrying		Fair		Carrying		Fair
		Value				Value				Value				Value				Value				Value				Value		Value		Value		Value		Value		Value
Investment:
Municipal and other tax-exempt		$	—			$	—			$	280,583			$	278,789			$	20,784			$	21,012			$	—	$	—	$	138,820	$	140,069	$	440,187	$	439,870
Mortgage-backed securities -- other		50,182				51,864				—				—				—				—				—		—		—		—		50,182		51,864
Other debt securities		—				—				167,463				175,921				—				—				—		—		20,046		19,472		187,509		195,393
Total investment securities		$	50,182			$	51,864			$	448,046			$	454,710			$	20,784			$	21,012			$	—	$	—	$	158,866	$	159,541	$	677,878	$	687,127
		U.S. Govt / GSE 1								AAA - AA																Below Investment Grade				Not Rated				Total
																		A - BBB
		Amortized Cost				Fair				Amortized Cost				Fair Value				Amortized Cost				Fair Value				Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair
						Value																														Value
Available for Sale:
U.S. Treasury		$	1,042			$	1,042			$	—			$	—			$	—			$	—			$	—	$	—	$	—	$	—	$	1,042	$	1,042
Municipal and other tax-exempt		—				—				44,969				45,984				15,854				15,545				—		—		12,409		12,246		73,232		73,775
Residential mortgage-backed securities:
U. S. government agencies:
FNMA		4,224,327				4,232,332				—				—				—				—				—		—		—		—		4,224,327		4,232,332
FHLMC		2,308,341				2,293,943				—				—				—				—				—		—		—		—		2,308,341		2,293,943
GNMA		1,151,225				1,152,128				—				—				—				—				—		—		—		—		1,151,225		1,152,128
Other		36,296				37,607				—				—				—				—				—		—		—		—		36,296		37,607
Total U.S. government agencies		7,720,189				7,716,010				—				—				—				—				—		—		—		—		7,720,189		7,716,010
Private issue:
Alt-A loans		—				—				—				—				—				—				104,559		107,212		—		—		104,559		107,212
Jumbo-A loans		—				—				—				—				—				—				109,622		113,887		—		—		109,622		113,887
Total private issue		—				—				—				—				—				—				214,181		221,099		—		—		214,181		221,099
Total residential mortgage-backed securities		7,720,189				7,716,010				—				—				—				—				214,181		221,099		—		—		7,934,370		7,937,109
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,100,146				2,055,804				—				—				—				—				—		—		—		—		2,100,146		2,055,804
Other debt securities		—				—				4,900				4,712				30,161				30,529				—		—		—		—		35,061		35,241
Perpetual preferred stock		—				—				—				—				11,406				11,859				10,765		11,004		—		—		22,171		22,863
Equity securities and mutual funds		—				—				4				457				—				—				—		—		19,065		20,871		19,069		21,328
Total available for sale securities		$	9,821,377			$	9,772,856			$	49,873			$	51,153			$	57,421			$	57,933			$	224,946	$	232,103	$	31,474	$	33,117	$	10,185,091	$	10,147,162
1	U.S. government and government sponsored enterprises are not rated by the nationally-recognized rating agencies as these securities are guaranteed by agencies of the U.S. government or government-sponsored enterprises.
At December 31, 2013, the entire portfolio of privately issued residential mortgage-backed securities was rated below investment grade by at least one of the nationally-recognized rating agencies. The gross unrealized loss on these securities totaled $2.4 million. Ratings by the nationally-recognized rating agencies are subjective in nature and accordingly ratings can vary significantly amongst the agencies. Limitations generally expressed by the rating agencies include statements that ratings do not predict the specific percentage default likelihood over any given period of time and that ratings do not opine on expected loss severity of an obligation should the issuer default. As such, the impairment of securities rated below investment grade by at least one of the nationally-recognized rating agencies was evaluated to determine if we expect not to recover the entire amortized cost basis of the security. This evaluation was based on projections of estimated cash flows based on individual loans underlying each security using current and anticipated increases in unemployment and default rates, changes in housing prices and estimated liquidation costs at foreclosure.
The primary assumptions used in this evaluation were:
	December 31,
	2013		2012
Unemployment rate	Increasing to 7.3% over the next 12 months and remain at 7.3% thereafter		Increasing to 8.5% over the next 12 months, dropping to 8% over the following 21 months and holding at 8% thereafter.
Housing price appreciation/depreciation	Starting with current depreciated housing prices based on information derived from the FHFA1, appreciating 4% over the next 12 months, then flat for the following 12 months and then appreciating at 2% per year thereafter.		Starting with current depreciated housing prices based on information derived from the FHFA1, depreciating 2% over the next 12 months, then flat for the following 12 months and then appreciating at 2% per year thereafter.
Estimated liquidation costs	Reflect actual historical liquidations costs observed on Jumbo and Alt-A residential mortgage loans in securities owned by the Company.		Reflect actual historical liquidations costs observed on Jumbo and Alt-A residential mortgage loans in securities owned by the Company.
Discount rates	Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.		Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.
1	Federal Housing Finance Agency
We also consider the current loan-to-value ratio and remaining credit enhancement as part of the assessment of the cash flows available to recover the amortized cost of the debt securities. Each factor is considered in the evaluation.
The Company calculates the current loan-to-value ratio for each mortgage-backed security using loan-level data. Current loan-to-value ratio is the current outstanding loan amount divided by an estimate of the current home value. The current home value is derived from FHFA data. FHFA provides historical information on home price depreciation at both the Metropolitan Statistical Area and state level. This information is matched to each loan to estimate the home price depreciation. Data is accumulated from the loan level to determine the current loan-to-value ratio for the security as a whole.
Remaining credit enhancement is the amount of credit enhancement available to absorb current projected losses within the pool of loans that support the security. The Company acquires the benefit of credit enhancement by investing in super-senior tranches for many of our residential mortgage-backed securities. Subordinated tranches held by other investors are specifically designed to absorb losses before the super-senior tranches which added an additional layer to the typical credit support for these types of bonds. Current projected losses consider depreciation of home prices based on FHFA data, estimated costs and additional losses to liquidate collateral and delinquency status of the individual loans underlying the security.
Credit loss impairment is recorded as a charge to earnings. Additional impairment based on the difference between the total unrealized loss and the estimated credit loss on these securities was charged against other comprehensive income, net of deferred taxes.
Based upon projected declines in expected cash flows from certain private-label residential mortgage-backed securities, the Company recognized $938 thousand of additional credit loss impairments in earnings during 2013. The Company recognized credit loss impairments on private-label residential mortgage-backed securities in earnings of $5.9 million in 2012 and $21.9 million in 2011.
In addition to other-than-temporary impairment charges on private-label residential mortgage-backed securities, the Company recognized $1.4 million of credit loss impairment in earnings during 2013 for certain below investment grade municipal securities based on an assessment of the issuer's on-going financial difficulties and bankruptcy filing in 2011. The Company recognized $1.0 million in impairment charges on these securities in 2012 and $1.6 million of impairment losses on these securities in 2011.
A distribution of the amortized cost (after recognition of the other-than-temporary impairment), fair value and credit loss impairments recognized on our privately issued residential mortgage-backed securities is as follows (in thousands, except for number of securities):
													Credit Losses Recognized
													Year ended
													December 31, 2013							Life-to-date
		Number of Securities			Amortized Cost				Fair Value				Number of			Amount				Number of Securities			Amount
													Securities
Alt-A		16			$	104,559			$	107,212			4			$	938			16			$	49,126
Jumbo-A		31			109,622				113,887				—			—				29			18,220
Total		47			$	214,181			$	221,099			4			$	938			45			$	67,346
Impaired equity securities, including perpetual preferred stocks, are evaluated based on management's ability and intent to hold the securities until fair value recovers over periods not to exceed three years. The assessment of the ability and intent to hold these securities focuses on the liquidity needs, asset/liability management objectives and securities portfolio objectives. Factors considered when assessing recovery include forecasts of general economic conditions and specific performance of the issuer, analyst ratings and credit spreads for preferred stocks which have debt-like characteristics. The Company has evaluated the near-term prospects of the investments in relation to the severity and duration of the impairment and based on that evaluation has the ability and intent to hold these investments until a recovery in fair value. Based on this evaluation, no other-than-temporary impairment losses was recorded in earnings on any equity securities during 2013. All remaining impairment of equity securities was considered temporary at December 31, 2013 and December 31, 2012. A $457 thousand other-than-temporary impairment loss related to equity securities was recorded in earnings in 2012 and no impairment losses were recorded in 2011.
The following is a tabular roll forward of the amount of credit-related OTTI recognized on available for sale debt securities in earnings (in thousands):
		Year Ended December 31,
		2013				2012
Balance of credit-related OTTI recognized on available for sale debt, beginning of period		$	75,228			$	76,131
Additions for credit-related OTTI not previously recognized		618				113
Additions for increases in credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost		320				6,780
Reductions for change in intent to hold before recovery		(3,589		)		—
Sales		(5,231		)		(7,796		)
Balance of credit-related OTTI recognized on available for sale debt securities, end of period		$	67,346			$	75,228
Fair Value Option Securities
Fair value option securities represent securities which the Company has elected to carry at fair value and separately identified on the Consolidated Balance Sheets with changes in the fair value recognized in earnings as they occur. Certain residential mortgage-backed securities issued by U.S. government agencies and derivative contracts are held as an economic hedge of the mortgage servicing rights. In addition, certain corporate debt securities are economically hedged by derivative contracts to manage interest rate risk. Derivative contracts that have not been designated as hedging instruments effectively modify these fixed rate securities into variable rate securities.
The fair value and net unrealized gain (loss) included in Fair value option securities is as follows (in thousands):
		December 31, 2013								December 31, 2012
		Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain (Loss)
U.S. agency residential mortgage-backed securities		$	157,431			$	(8,378	)		$	257,040			$	3,314
Corporate debt securities		—				—				26,486				1,409
Other securities		$	9,694			$	209			$	770			$	47
Total		$	167,125			$	(8,169	)		$	284,296			$	4,770
Restricted Equity Securities
Restricted equity securities include stock we are required to hold as members of the Federal Reserve system and the Federal Home Loan Banks ("FHLB"). Restricted equity securities are carried at cost as theses securities do not have a readily determined fair value because ownership of these shares are restricted and lacks a market. Federal Reserve Bank stock totaled $34 million at December 31, 2013 and $34 million at December 31, 2012. Holdings of FHLB stock totaled $51 million at December 31, 2013 and $31 million at December 31, 2012.

Derivatives

Derivatives	12 Months Ended
	Dec. 31, 2013
Derivative Instrument Detail [Abstract]	'
Derivatives [Text Block]	'
	(3) Derivatives
	The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at December 31, 2013 (in thousands):
			Assets
			Notional1		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	10,817,159	$	102,921		$	(46,623	)	$	56,298		$	—		$	56,298
	Interest rate swaps		1,283,379		44,124			—			44,124			(731		)	43,393
	Energy contracts		1,263,266		48,078			(29,957		)	18,121			(2,575		)	15,546
	Agricultural contracts		100,886		2,060			(1,166		)	894			—			894
	Foreign exchange contracts		136,543		136,543			—			136,543			(2,147		)	134,396
	Equity option contracts		210,816		17,957			—			17,957			(3,472		)	14,485
	Total customer risk management programs		13,812,049		351,683			(77,746		)	273,937			(8,925		)	265,012
	Interest rate risk management programs		—		—			—			—			—			—
	Total derivative contracts		$	13,812,049	$	351,683		$	(77,746	)	$	273,937		$	(8,925	)	$	265,012
			Liabilities
			Notional¹		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	10,982,049	$	99,830		$	(46,623	)	$	53,207		$	—		$	53,207
	Interest rate swaps		1,283,379		44,377			—			44,377			(17,853		)	26,524
	Energy contracts		1,216,426		46,095			(29,957		)	16,138			(6,055		)	10,083
	Agricultural contracts		99,191		2,009			(1,166		)	843			—			843
	Foreign exchange contracts		135,237		135,237			—			135,237			(294		)	134,943
	Equity option contracts		210,816		17,957			—			17,957			—			17,957
	Total customer risk management programs		13,927,098		345,505			(77,746		)	267,759			(24,202		)	243,557
	Interest rate risk management programs		47,000		3,628			—			3,628			—			3,628
	Total derivative contracts		$	13,974,098	$	349,133		$	(77,746	)	$	271,387		$	(24,202	)	$	247,185
	1	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
	When bilateral netting agreements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by counterparty basis.
	Derivative contracts may also require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. As of December 31, 2013, a decrease in credit rating to below investment grade would increase our obligation to post cash margin on existing contracts by approximately $26 million.
	The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at December 31, 2012 (in thousands):
			Assets
			Notional1		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	12,850,805	$	46,113		$	(15,656	)	$	30,457		$	—		$	30,457
	Interest rate swaps		1,319,827		72,201			—			72,201			—			72,201
	Energy contracts		1,346,780		82,349			(44,485		)	37,864			(3,464		)	34,400
	Agricultural contracts		212,434		3,638			(3,164		)	474			—			474
	Foreign exchange contracts		180,318		180,318			—			180,318			—			180,318
	Equity option contracts		211,941		12,593			—			12,593			—			12,593
	Total customer risk management programs		16,122,105		397,212			(63,305		)	333,907			(3,464		)	330,443
	Interest rate risk management programs		66,000		7,663			—			7,663			—			7,663
	Total derivative contracts		$	16,188,105	$	404,875		$	(63,305	)	$	341,570		$	(3,464	)	$	338,106
			Liabilities
			Notional¹		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	13,239,078	$	43,064		$	(15,656	)	$	27,408		$	(15,467	)	$	11,941
	Interest rate swaps		1,319,827		72,724			—			72,724			(31,945		)	40,779
	Energy contracts		1,334,349		83,654			(44,485		)	39,169			(1,769		)	37,400
	Agricultural contracts		212,135		3,571			(3,164		)	407			(188		)	219
	Foreign exchange contracts		179,852		179,852			—			179,852			—			179,852
	Equity option contracts		211,941		12,593			—			12,593			—			12,593
	Total customer risk management programs		16,497,182		395,458			(63,305		)	332,153			(49,369		)	282,784
	Interest rate risk management programs		50,000		805			—			805			—			805
	Total derivative contracts		$	16,547,182	$	396,263		$	(63,305	)	$	332,958		$	(49,369	)	$	283,589
	1	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
	The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the Consolidated Statement of Earnings (in thousands):
			Year Ended
			December 31, 2013					December 31, 2012						December 31, 2011
			Brokerage		Gain (Loss)			Brokerage			Gain (Loss)			Brokerage			Gain (Loss)
and Trading Revenue			on Derivatives, Net			and Trading			on Derivatives,			and Trading			on Derivatives,
						Revenue			Net			Revenue			Net
Customer Risk Management Programs:
Interest rate contracts
To-be-announced residential mortgage-backed securities		$	42	$	—		$	1,070		$	—		$	(4,047	)	$	—
Interest rate swaps		2,991		—			3,458			—			3,193			—
Energy contracts		8,303		—			8,171			—			5,262			—
Agricultural contracts		357		—			382			—			341			—
Foreign exchange contracts		687		—			612			—			565			—
Equity option contracts		—		—			—			—			—			—
Total Customer Risk Management Programs		12,380		—			13,693			—			5,314			—
Interest Rate Risk Management Programs		—		(4,367		)	—			(301		)	—			2,526
Total Derivative Contracts		$	12,380	$	(4,367	)	$	13,693		$	(301	)	$	5,314		$	2,526
At December 31, 2013, BOK Financial had interest rate swaps with a notional value of $47 million used as part of the economic hedge of the change in the fair value of the mortgage servicing rights.
As discussed in Note 7, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 7 for additional discussion of notional, fair value and impact on earnings of these contracts. Forward sales contracts are not considered swaps under the Commodity and Futures Trading Commission final rules.
None of these derivative contracts have been designated as hedging instruments.

Loans_and_Allowances_for_Credi

Loans and Allowances for Credit Losses	12 Months Ended
	Dec. 31, 2013
Loans Receivable, Net [Abstract]	'
Loans [Text Block]	'
	(4) Loans and Allowances for Credit Losses
	The portfolio segments of the loan portfolio are as follows (in thousands):
			December 31, 2013																December 31, 2012
			Fixed				Variable				Non-accrual				Total				Fixed				Variable				Non-accrual			Total
			Rate				Rate												Rate				Rate
	Commercial		$	1,637,620			$	6,288,841			$	16,760			$	7,943,221			$	2,955,779			$	4,661,666			$	24,467		$	7,641,912
	Commercial real estate		770,908				1,603,595				40,850				2,415,353				779,114				1,389,259				60,626			2,228,999
	Residential mortgage		1,783,615				226,092				42,319				2,052,026				1,747,038				251,394				46,608			2,045,040
	Consumer		135,494				244,950				1,220				381,664				175,412				217,384				2,709			395,505
	Total		$	4,327,637			$	8,363,478			$	101,149			$	12,792,264			$	5,657,343			$	6,519,703			$	134,410		$	12,311,456
	Accruing loans past due (90 days)1														$	1,415														$	3,925
	Foregone interest on nonaccrual loans														$	5,361														$	8,587
	1	Excludes residential mortgage loans guaranteed by agencies of the U.S. government
	At December 31, 2013, loans to businesses and individuals with collateral primarily located in Texas totaled $4.3 billion or 34% of the total loan portfolio. Loans to businesses and individuals with collateral primarily located in Oklahoma totaled $3.3 billion or 26% of our total loan portfolio. Loans for which the collateral location is not relevant, such as unsecured loans and reserve-based energy loans, are distributed by the borrower’s primary operating location. These geographic concentrations subject the loan portfolio to the general economic conditions within these areas. At December 31, 2012, loans to businesses and individuals with collateral primarily located in Texas totaled $4.0 billion or 32% of the loan portfolio and loans to businesses and individuals with collateral primarily located in Oklahoma totaled $3.3 billion or 27% of the loan portfolio.
	Commercial
	Commercial loans represent loans for working capital, facilities acquisition or expansion, purchases of equipment and other needs of commercial customers primarily located within our geographical footprint. Commercial loans are underwritten individually and represent on-going relationships based on a thorough knowledge of the customer, the customer’s industry and market. While commercial loans are generally secured by the customer’s assets including real property, inventory, accounts receivable, operating equipment, interest in mineral rights and other property and may also include personal guarantees of the owners and related parties, the primary source of repayment of the loans is the on-going cash flow from operations of the customer’s business. Inherent lending risk is centrally monitored on a continuous basis from underwriting throughout the life of the loan for compliance with commercial lending policies.
	At December 31, 2013, commercial loans with collateral primarily located in Texas totaled $2.8 billion or 36% of the commercial loan portfolio segment and commercial loans with collateral primarily locate in Oklahoma totaled $1.9 billion or 23% of the commercial loan portfolio segment. The commercial loan portfolio segment is further divided into loan classes. The energy loan class totaled $2.4 billion or 18% of total loans at December 31, 2013, including $2.0 billion of outstanding loans to energy producers. Approximately 59% of committed production loans are secured by properties primarily producing oil and 41% are secured by properties producing natural gas. The services loan class totaled $2.3 billion at December 31, 2013. Approximately $1.1 billion of loans in the services category consist of loans with individual balances of less than $10 million.  Businesses included in the services class include community foundations, gaming, public finance, insurance and heavy equipment dealers.
	At December 31, 2012, commercial loans with collateral primarily located in Texas totaled $2.6 billion or 34% of the commercial loan portfolio segment and commercial loans with collateral primarily locate in Oklahoma totaled $1.9 billion or 25% of the commercial loan portfolio segment. The energy loan class totaled $2.5 billion and the services loan class totaled $2.2 billion. Approximately $993 million of loans in the services category consisted of loans with individual balances of less than $10 million.
	Commercial Real Estate
	Commercial real estate loans are for the construction of buildings or other improvements to real estate and property held by borrowers for investment purposes primarily within our geographical footprint. We require collateral values in excess of the loan amounts, demonstrated cash flows in excess of expected debt service requirements, equity investment in the project and a portion of the project already sold, leased or permanent financing already secured. The expected cash flows from all significant new or renewed income producing property commitments are stress tested to reflect the risks in varying interest rates, vacancy rates and rental rates. As with commercial loans, inherent lending risks are centrally monitored on a continuous basis from underwriting throughout the life of the loan for compliance with applicable lending policies.
	At December 31, 2013, 32% of commercial real estate loans are secured by properties primarily located in the Dallas and Houston areas of Texas. An additional 19% of commercial real estate loans are secured by properties located primarily in the Tulsa and Oklahoma City metropolitan areas of Oklahoma and 11% of commercial real estate loans are secured by properties located primarily in Albuquerque, New Mexico. At December 31, 2012, 31% of commercial real estate loans were secured by properties in Texas, 19% of commercial real estate loans were secured by properties in Oklahoma and 13% of commercial real estate loans are secured by properties located primarily in Albuquerque, New Mexico.
	Residential Mortgage and Consumer
	Residential mortgage loans provide funds for our customers to purchase or refinance their primary residence or to borrow against the equity in their home. Residential mortgage loans are secured by a first or second mortgage on the customer’s primary residence. Consumer loans include direct loans secured by and for the purchase of automobiles, recreational and marine equipment as well as other unsecured loans. Consumer loans also include indirect automobile loans made through primary dealers. Residential mortgage and consumer loans are made in accordance with underwriting policies we believe to be conservative and are fully documented. Credit scoring is assessed based on significant credit characteristics including credit history, residential and employment stability. Residential mortgage loans retained in the Company’s portfolio are primarily composed of various mortgage programs to support customer relationships including jumbo mortgage loans, non-builder construction loans and special loan programs for high net worth individuals and certain professionals. Jumbo loans may be fixed or variable rate and are fully amortizing. Jumbo loans generally conform to government sponsored entity standards, except that the loan size exceeds maximums required under these standards. These loans generally require a minimum FICO score of 720 and a maximum debt-to-income ratio (“DTI”) of 38%. Loan-to-value (“LTV”) ratios are tiered from 60% to 100%, depending on the market.  Special mortgage programs include fixed and variable fully amortizing loans tailored to the needs of certain healthcare professionals.  Variable rate loans are fully indexed at origination and may have fixed rates for three to ten years, then adjust annually thereafter.
	At December 31, 2013 and 2012, residential mortgage loans included $182 million and $160 million, respectively, of loans guaranteed by U.S. government agencies previously sold into GNMA mortgage pools. These loans either have been repurchased or are eligible to be repurchased by the Company when certain defined delinquency criteria are met. Although payments on these loans generally are past due more than 90 days, interest continues to accrue based on the government guarantee.
	Home equity loans totaled $808 million at December 31, 2013 and $761 million at December 31, 2012. At December 31, 2013, 70% of the home equity loan portfolio was comprised of first lien loans and 30% of the home equity portfolio was comprised of junior lien loans. Junior lien loans were distributed 74% to amortizing term loans and 26% to revolving lines of credit. At December 31, 2012, 68% of the home equity portfolio was comprised of first lien loans and 32% of the home equity loan portfolio was comprised on junior lien loans. Junior lien loans were distributed 78% to amortizing term loans and 22% to revolving lines of credit. Home equity loans generally require a minimum FICO score of 700 and a maximum DTI of 40%. The maximum loan amount available for our home equity loan products is generally $400 thousand. Revolving loans have a 5 year revolving period followed by 15 year term of amortizing repayments. Interest-only home equity loans may not be extended for any additional revolving time. All other home equity loans may be extended at management's discretion for an additional 5 year revolving term subject to an update of certain credit information.
	At December 31, 2013, 38% of residential mortgage loans are secured by properties located in Oklahoma, 27% of residential mortgage loans are secured by properties located in Texas, 12% of residential mortgage are secured by properties located in New Mexico and 10% of residential mortgage are secured by properties located in Colorado. At December 31, 2012, 34% of residential mortgage were secured by properties in Texas, 23% of residential mortgage loans were secured by properties in Oklahoma, and 17% of residential mortgage loans are secured by properties in New Mexico and 11% of residential mortgage are secured by properties located in Colorado.
	Credit Commitments
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. At December 31, 2013, outstanding commitments totaled $7.1 billion. Because some commitments are expected to expire before being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. BOK Financial uses the same credit policies in making commitments as it does loans.
	The amount of collateral obtained, if deemed necessary, is based upon management’s credit evaluation of the borrower.
	Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Because the credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan commitments, BOK Financial uses the same credit policies in evaluating the creditworthiness of the customer. Additionally, BOK Financial uses the same evaluation process in obtaining collateral on standby letters of credit as it does for loan commitments. The term of these standby letters of credit is defined in each commitment and typically corresponds with the underlying loan commitment. At December 31, 2013, outstanding standby letters of credit totaled $444 million. Commercial letters of credit are used to facilitate customer trade transactions with the drafts being drawn when the underlying transaction is consummated. At December 31, 2013, outstanding commercial letters of credit totaled $13 million.
	Allowances for Credit Losses
	BOK Financial maintains an allowance for loan losses and an accrual for off-balance sheet credit risk. The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees. As discussed in greater detail in Note 7, the Company also has separate accruals related to off-balance sheet credit risk related to residential mortgage loans previously sold with full or partial recourse and for residential mortgage loans sold to government sponsored agencies under standard representations and warranties.
	The allowance for loan losses consists of specific allowances attributed to impaired loans that have not yet been charged down to amounts we expect to recover, general allowances for unimpaired loans based on estimated loss rates by loan class and nonspecific allowances based on general economic conditions, concentration in loans with large balances and other relevant factors.
	The activity in the allowance for loan losses and the accrual for off-balance sheet credit risk related to loan commitments and standby letters of credit for the year ended December 31, 2013 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific allowance				Total
	Allowance for loan losses:
	Beginning balance		$	65,280			$	54,884			$	41,703			$	9,453			$	44,187			$	215,507
	Provision for loan losses		12,747				(16,886		)		(8,043		)		83				(15,974		)		(28,073		)
	Loans charged off		(6,335		)		(5,845		)		(5,753		)		(7,349		)		—				(25,282		)
	Recoveries		7,488				9,420				1,558				4,778				—				23,244
	Ending balance		$	79,180			$	41,573			$	29,465			$	6,965			$	28,213			$	185,396
	Accrual for off-balance sheet credit risk:
	Beginning balance		$	475			$	1,353			$	78			$	9			$	—			$	1,915
	Provision for off-balance sheet credit risk		(356		)		523				12				(6		)		—				173
	Ending balance		$	119			$	1,876			$	90			$	3			$	—			$	2,088
	Total provision for credit losses		$	12,391			$	(16,363	)		$	(8,031	)		$	77			$	(15,974	)		$	(27,900	)
	The activity in the allowance for loan losses and the accrual for off-balance sheet credit risk related to loan commitments and standby letters of credit for the year ended December 31, 2012 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific allowance				Total
	Allowance for loan losses:
	Beginning balance		$	83,443			$	67,034			$	46,476			$	10,178			$	46,350			$	253,481
	Provision for loan losses		(14,950		)		(6,214		)		3,346				5,327				(2,163		)		(14,654		)
	Loans charged off		(9,341		)		(11,642		)		(10,047		)		(11,108		)		—				(42,138		)
	Recoveries		6,128			1	5,706				1,928				5,056				—				18,818
	Ending balance		$	65,280			$	54,884			$	41,703			$	9,453			$	44,187			$	215,507
	Accrual for off-balance sheet credit risk:
	Beginning balance		$	7,906			$	1,250			$	91			$	14			$	—			$	9,261
	Provision for off-balance sheet credit risk		(7,431		)		103				(13		)		(5		)		—				(7,346		)
	Ending balance		$	475			$	1,353			$	78			$	9			$	—			$	1,915
	Total provision for credit losses		$	(22,381	)		$	(6,111	)		$	3,333			$	5,322			$	(2,163	)		$	(22,000	)
	1	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa invalidated by the Oklahoma Supreme Court.
	The activity in the allowance for loan losses and the accrual for off-balance sheet credit risk related to loan commitments and standby letters of credit for the year ended December 31, 2011 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific allowance				Total
	Allowance for loan losses:
Beginning balance		$	104,631			$	98,709			$	50,281			$	12,614			$	26,736			$	292,971
Provision for loan losses		(13,830		)		(18,482		)		7,968				3,690				19,614				(1,040		)
Loans charged off		(14,836		)		(15,973		)		(14,107		)		(11,884		)		—				(56,800		)
Recoveries		7,478				2,780				2,334				5,758				—				18,350
Ending balance		$	83,443			$	67,034			$	46,476			$	10,178			$	46,350			$	253,481
Accrual for off-balance sheet credit risk:
Beginning balance		$	13,456			$	443			$	131			$	241			$	—			$	14,271
Provision for off-balance sheet credit risk		(5,550		)		807				(40		)		(227		)		—				(5,010		)
Ending balance		$	7,906			$	1,250			$	91			$	14			$	—			$	9,261
Total provision for credit losses		$	(19,380	)		$	(17,675	)		$	7,928			$	3,463			$	19,614			$	(6,050	)
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at December 31, 2013 is as follows (in thousands):
		Collectively Measured								Individually Measured								Total
		for Impairment								for Impairment
		Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																						Allowance
Commercial		$	7,926,461			$	78,607			$	16,760			$	573			$	7,943,221			$	79,180
Commercial real estate		2,374,503				41,440				40,850				133				2,415,353				41,573
Residential mortgage		2,010,483				29,217				41,543				248				2,052,026				29,465
Consumer		380,445				6,965				1,219				—				381,664				6,965
Total		12,691,892				156,229				100,372				954				12,792,264				157,183
Nonspecific allowance		—				—				—				—				—				28,213
Total		$	12,691,892			$	156,229			$	100,372			$	954			$	12,792,264			$	185,396
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at December 31, 2012 is as follows (in thousands):
		Collectively Measured								Individually Measured								Total
		for Impairment								for Impairment
		Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																						Allowance
Commercial		$	7,617,445			$	65,050			$	24,467			$	230			$	7,641,912			$	65,280
Commercial real estate		2,168,373				51,775				60,626				3,109				2,228,999				54,884
Residential mortgage		1,998,432				40,934				46,608				769				2,045,040				41,703
Consumer		392,796				9,328				2,709				125				395,505				9,453
Total		12,177,046				167,087				134,410				4,233				12,311,456				171,320
Nonspecific allowance		—				—				—				—				—				44,187
Total		$	12,177,046			$	167,087			$	134,410			$	4,233			$	12,311,456			$	215,507
Credit Quality Indicators
The Company utilizes loan class and risk grading as primary credit quality indicators. Substantially all commercial and commercial real estate loans and certain residential mortgage and consumer loans are risk graded based on a quarterly evaluation of the borrowers’ ability to repay the loans. Certain commercial loans and most residential mortgage and consumer loans are small, homogeneous pools that are not risk graded.
The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at December 31, 2013 is as follows (in thousands):
		Internally Risk Graded								Non-Graded								Total
		Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																						Allowance
Commercial		$	7,888,219			$	78,250			$	55,002			$	930			$	7,943,221			$	79,180
Commercial real estate		2,415,353				41,573				—				—				2,415,353				41,573
Residential mortgage		220,635				5,481				1,831,391				23,984				2,052,026				29,465
Consumer		265,533				2,657				116,131				4,308				381,664				6,965
Total		10,789,740				127,961				2,002,524				29,222				12,792,264				157,183
Nonspecific allowance		—				—				—				—				—				28,213
Total		$	10,789,740			$	127,961			$	2,002,524			$	29,222			$	12,792,264			$	185,396
The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at December 31, 2012 is as follows (in thousands):
		Internally Risk Graded								Non-Graded								Total
		Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																						Allowance
Commercial		$	7,624,442			$	64,181			$	17,470			$	1,099			$	7,641,912			$	65,280
Commercial real estate		2,228,999				54,884				—				—				2,228,999				54,884
Residential mortgage		265,503				5,270				1,779,537				36,433				2,045,040				41,703
Consumer		231,376				2,987				164,129				6,466				395,505				9,453
Total		10,350,320				127,322				1,961,136				43,998				12,311,456				171,320
Nonspecific allowance		—				—				—				—				—				44,187
Total		$	10,350,320			$	127,322			$	1,961,136			$	43,998			$	12,311,456			$	215,507
Loans are considered to be performing if they are in compliance with the original terms of the agreement which is consistent with the regulatory guideline of “pass.” Performing also includes loans considered to be “other loans especially mentioned” by regulatory guidelines. Other loans especially mentioned are in compliance with the original terms of the agreement but may have a weakness that deserves management’s close attention. Performing loans also include past due residential mortgages that are guaranteed by agencies of the U.S. government.
The risk grading process identified certain criticized loans as potential problem loans. These loans have a well-defined weakness (e.g. inadequate debt service coverage or liquidity or marginal capitalization; repayment may depend on collateral or other risk mitigation) that may jeopardize liquidation of the debt and represent a greater risk due to deterioration in the financial condition of the borrower. This is consistent with the regulatory guideline for “substandard.” Because the borrowers are still performing in accordance with the original terms of the loan agreements, these loans were not placed in nonaccruing status. Known information does, however, cause concern as to the borrowers’ continued compliance with current repayment terms. Nonaccruing loans represent loans for which full collection of principal and interest in accordance with the original terms of the loan agreements is uncertain. This is substantially the same criteria used to determine whether a loan is impaired and includes certain loans considered “substandard” and all loans considered “doubtful” by regulatory guidelines.
The following table summarizes the Company’s loan portfolio at December 31, 2013 by the risk grade categories (in thousands):
		Internally Risk Graded												Non-Graded
		Performing				Potential Problem				Nonaccruing				Performing				Nonaccruing				Total
Commercial:
Energy		$	2,347,519			$	2,381			$	1,860			$	—			$	—			$	2,351,760
Services		2,265,984				11,304				4,922				—				—				2,282,210
Wholesale/retail		1,191,791				2,604				6,969				—				—				1,201,364
Manufacturing		381,794				9,365				592				—				—				391,751
Healthcare		1,272,626				34				1,586				—				—				1,274,246
Integrated food services		145,758				4,736				—				—				—				150,494
Other commercial and industrial		235,636				—				758				54,929				73				291,396
Total commercial		7,841,108				30,424				16,687				54,929				73				7,943,221
Commercial real estate:
Residential construction and land development		173,488				15,393				17,377				—				—				206,258
Retail		579,506				1,684				4,857				—				—				586,047
Office		403,951				1,157				6,391				—				—				411,499
Multifamily		562,800				13,695				7				—				—				576,502
Industrial		243,625				—				252				—				—				243,877
Other commercial real estate		371,628				7,576				11,966				—				—				391,170
Total commercial real estate		2,334,998				39,505				40,850				—				—				2,415,353
Residential mortgage:
Permanent mortgage		210,142				3,283				7,210				815,040				27,069				1,062,744
Permanent mortgages guaranteed by U.S. government agencies		—				—				—				180,821				777				181,598
Home equity		—				—				—				800,420				7,264				807,684
Total residential mortgage		210,142				3,283				7,210				1,796,281				35,110				2,052,026
Consumer:
Indirect automobile		—				—				—				5,796				717				6,513
Other consumer		264,536				795				202				109,318				300				375,151
Total consumer		264,536				795				202				115,114				1,017				381,664
Total		$	10,650,784			$	74,007			$	64,949			$	1,966,324			$	36,200			$	12,792,264
The following table summarizes the Company’s loan portfolio at December 31, 2012 by the risk grade categories (in thousands):
		Internally Risk Graded												Non-Graded
		Performing				Potential Problem				Nonaccruing				Performing				Nonaccruing				Total
Commercial:
Energy		$	2,448,954			$	9,245			$	2,460			$	—			$	—			$	2,460,659
Services		2,119,734				32,362				12,090				—				—				2,164,186
Wholesale/retail		1,093,413				9,949				3,077				—				—				1,106,439
Manufacturing		337,132				9,345				2,007				—				—				348,484
Healthcare		1,077,773				467				3,166				—				—				1,081,406
Integrated food services		190,422				—				684				—				—				191,106
Other commercial and industrial		266,329				4,914				919				17,406				64				289,632
Total commercial		7,533,757				66,282				24,403				17,406				64				7,641,912
Commercial real estate:
Residential construction and land development		204,010				22,952				26,131				—				—				253,093
Retail		508,342				6,327				8,117				—				—				522,786
Office		405,763				15,280				6,829				—				—				427,872
Multifamily		393,566				6,624				2,706				—				—				402,896
Industrial		241,761				265				3,968				—				—				245,994
Other commercial real estate		351,663				11,820				12,875				—				—				376,358
Total commercial real estate		2,105,105				63,268				60,626				—				—				2,228,999
Residential mortgage:
Permanent mortgage		242,823				10,271				12,409				831,008				27,454				1,123,965
Permanent mortgages guaranteed by U.S. government agencies		—				—				—				159,955				489				160,444
Home equity		—				—				—				754,375				6,256				760,631
Total residential mortgage		242,823				10,271				12,409				1,745,338				34,199				2,045,040
Consumer:
Indirect automobile		—				—				—				33,157				1,578				34,735
Other consumer		229,570				1,091				715				128,978				416				360,770
Total consumer		229,570				1,091				715				162,135				1,994				395,505
Total		$	10,111,255			$	140,912			$	98,153			$	1,924,879			$	36,257			$	12,311,456
Impaired Loans
Loans are considered to be impaired when it is probable that the Company will not be able to collect all amounts due according to the contractual terms of the loan agreement. This includes all nonaccruing loans, all loans modified in a troubled debt restructuring and all loans repurchased from GNMA pool.
A summary of impaired loans follows (in thousands):
	As of December 31, 2013																				For the Year Ended
					Recorded Investment																December 31, 2013
	Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized
	Principal								Allowance												Investment
	Balance
Commercial:
Energy	$	1,860			$	1,860			$	1,860			$	—			$	—			$	2,160			$	—
Services	6,486				4,922				3,791				1,131				516				8,506				—
Wholesale/retail	11,009				6,969				6,937				32				9				5,023				—
Manufacturing	746				592				592				—				—				1,300				—
Healthcare	2,193				1,586				1,538				48				48				2,376				—
Integrated food services	—				—				—				—				—				342				—
Other commercial and industrial	8,532				831				831				—				—				907				—
Total commercial	30,826				16,760				15,549				1,211				573				20,614				—
Commercial real estate:
Residential construction and land development	20,804				17,377				17,050				327				107				21,754				—
Retail	6,133				4,857				4,857				—				—				6,487				—
Office	7,848				6,391				6,383				8				8				6,610				—
Multifamily	7				7				7				—				—				1,357				—
Industrial	252				252				252				—				—				2,110				—
Other real estate loans	14,593				11,966				11,779				187				18				12,421				—
Total commercial real estate	49,637				40,850				40,328				522				133				50,739				—
Residential mortgage:
Permanent mortgage	41,870				34,279				33,869				410				248				37,071				1,582
Permanent mortgage guaranteed by U.S. government agencies1	188,436				181,598				181,598				—				—				165,509				6,961
Home equity	7,537				7,264				7,264				—				—				6,760				—
Total residential mortgage	237,843				223,141				222,731				410				248				209,340				8,543
Consumer:
Indirect automobile	719				717				717				—				—				1,148				—
Other consumer	509				502				502				—				—				817				—
Total consumer	1,228				1,219				1,219				—				—				1,965				—
Total	$	319,534			$	281,970			$	279,827			$	2,143			$	954			$	282,658			$	8,543
1	All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2013, $777 thousand of these loans are nonaccruing and $181 million are accruing based on the guarantee by U.S. government agencies.
Generally, no interest income is recognized on impaired loans until all principal balances, including amounts charged-off, have been recovered.
	As of December 31, 2012																					For the Year Ended
						Recorded Investment																December 31, 2012
		Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized
		Principal								Allowance												Investment
		Balance
Commercial:
Energy		$	2,460			$	2,460			$	2,460			$	—			$	—			$	1,398			$	—
Services		15,715				12,090				11,940				150				149				14,529				—
Wholesale/retail		9,186				3,077				3,016				61				15				12,129				—
Manufacturing		2,447				2,007				2,007				—				—				12,529				—
Healthcare		4,256				3,166				2,050				1,116				66				4,326				—
Integrated food services		684				684				684				—				—				342				—
Other commercial and industrial		8,482				983				983				—				—				1,387				—
Total commercial		43,230				24,467				23,140				1,327				230				46,640				—
Commercial real estate:
Residential construction and land development		44,721				26,131				25,575				556				155				44,003				—
Retail		9,797				8,117				8,117				—				—				7,490				—
Office		8,949				6,829				6,604				225				21				9,143				—
Multifamily		3,189				2,706				2,706				—				—				3,110				—
Industrial		3,968				3,968				—				3,968				2,290				1,984				—
Other real estate loans		15,377				12,875				10,049				2,826				643				14,181				—
Total commercial real estate		86,001				60,626				53,051				7,575				3,109				79,911				—
Residential mortgage:
Permanent mortgage		51,153				39,863				37,564				2,299				769				32,614				1,590
Permanent mortgage guaranteed by U.S. government agencies1		170,740				160,444				160,444				—				—				173,729				6,718
Home equity		6,256				6,256				6,256				—				—				5,329				—
Total residential mortgage		228,149				206,563				204,264				2,299				769				211,672				8,308
Consumer:
Indirect automobile		1,578				1,578				1,578				—				—				1,886				—
Other consumer		1,300				1,131				1,006				125				125				1,226				—
Total consumer		2,878				2,709				2,584				125				125				3,112				—
Total		$	360,258			$	294,365			$	283,039			$	11,326			$	4,233			$	341,335			$	8,308
1	All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2012, $489 thousand of these loans are nonaccruing and $160 million are accruing based on the guarantee by U.S. government agencies.
Troubled Debt Restructurings
A summary of troubled debt restructurings ("TDRs") by accruing status as of December 31, 2013 were as follows (in thousands):
		As of December 31, 2013
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Amounts Charged-Off During the Year Ended December 31, 2013
		Investment								Performing in Accordance With Modified Terms				Allowance
Nonaccruing TDRs:
Commercial:
Energy		$	—			$	—			$	—			$	—			$	—
Services		2,235				852				1,383				237				—
Wholesale/retail		235				89				146				9				—
Manufacturing		391				—				391				—				154
Healthcare		—				—				—				—				—
Integrated food services		—				—				—				—				—
Other commercial and industrial		771				173				598				—				—
Total commercial		3,632				1,114				2,518				246				154
Commercial real estate:
Residential construction and land development		10,148				1,444				8,704				107				46
Retail		4,359				3,141				1,218				—				582
Office		5,059				3,872				1,187				—				117
Multifamily		—				—				—				—				—
Industrial		—				—				—				—				—
Other real estate loans		5,011				2,885				2,126				—				—
Total commercial real estate		24,577				11,342				13,235				107				745
Residential mortgage:
Permanent mortgage		18,697				12,214				6,483				88				469
Home equity		4,045				3,531				514				—				112
Total residential mortgage		22,742				15,745				6,997				88				581
Consumer:
Indirect automobile		629				555				74				—				1
Other consumer		379				203				176				—				—
Total consumer		1,008				758				250				—				1
Total nonaccruing TDRs		$	51,959			$	28,959			$	23,000			$	441			$	1,481
Accruing TDRs:
Residential mortgage:
Permanent mortgage		—				—				—				—				—
Permanent mortgages guaranteed by U.S. government agencies		54,322				13,384				40,938				—				—
Total residential mortgage		54,322				13,384				40,938				—				—
Total accruing TDRs		54,322				13,384				40,938				—				—
Total TDRs		$	106,281			$	42,343			$	63,938			$	441			$	1,481
A summary of troubled debt restructurings by accruing status as of December 31, 2012 were as follows (in thousands):
		As of December 31, 2012
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Amounts Charged-off During the Year Ended December 31, 2012
		Investment								Performing in Accordance With Modified Terms				Allowance
Nonaccruing TDRs:
Commercial:
Energy		$	—			$	—			$	—			$	—			$	—
Services		2,492				2,099				393				45				—
Wholesale/retail		2,290				1,362				928				15				107
Manufacturing		—				—				—				—				—
Healthcare		64				64				—				—				—
Integrated food services		—				—				—				—				—
Other commercial and industrial		675				—				675				—				—
Total commercial		5,521				3,525				1,996				60				107
Commercial real estate:
Residential construction and land development		14,898				9,989				4,909				76				1,143
Retail		6,785				5,735				1,050				—				150
Office		3,899				1,920				1,979				—				269
Multifamily		—				—				—				—				—
Industrial		—				—				—				—				—
Other real estate loans		5,017				3,399				1,618				—				2,182
Total commercial real estate		30,599				21,043				9,556				76				3,744
Residential mortgage:
Permanent mortgage		20,490				12,214				8,276				54				1,476
Home equity		—				—				—				—				—
Total residential mortgage		20,490				12,214				8,276				54				1,476
Consumer:
Indirect automobile		—				—				—				—				—
Other consumer		2,860				2,589				271				83				198
Total consumer		2,860				2,589				271				83				198
Total nonaccuring TDRs		$	59,470			$	39,371			$	20,099			$	273			$	5,525
Accruing TDRs:
Residential mortgage:
Permanent mortgage		—				—				—				—				—
Permanent mortgages guaranteed by U.S. government agencies		38,515				8,755				29,760				—				—
Total residential mortgage		38,515				8,755				29,760				—				—
Total accruing TDRs		38,515				8,755				29,760				—				—
Total TDRs		$	97,985			$	48,126			$	49,859			$	273			$	5,525
Troubled debt restructurings generally consist of interest rates concessions, payment stream concessions or a combination of concessions to distressed borrowers. The following table details the recorded balance of loans at December 31, 2013 by class that were restructured during the year ended December 31, 2013 by primary type of concession (in thousands):
	Year Ended December 31, 2013
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				—				1,080				—				1,080			1,080
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				391				—				391			391
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				139				—				57				196			196
Total commercial	—				—				—				139				1,471				57				1,667			1,667
Commercial real estate:
Residential construction and land development	—				—				—				—				—				—				—			—
Retail	—				—				—				—				486				—				486			486
Office	—				—				—				—				2,819				—				2,819			2,819
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				517				—				517			517
Total commercial real estate	—				—				—				—				3,822				—				3,822			3,822
Residential mortgage:
Permanent mortgage	—				—				—				—				1,062				1,894				2,956			2,956
Permanent mortgage guaranteed by U.S. government agencies	11,545				12,518				24,063				—				—				—				—			24,063
Home equity	—				—				—				—				—				2,800				2,800			2,800
Total residential mortgage	11,545				12,518				24,063				—				1,062				4,694				5,756			29,819
Consumer:
Indirect automobile	—				—				—				—				—				510				510			510
Other consumer	—				—				—				75				—				128				203			203
Total consumer	—				—				—				75				—				638				713			713
Total	$	11,545			$	12,518			$	24,063			$	214			$	6,355			$	5,389			$	11,958		$	36,021
The following table details the recorded balance of loans by class that were restructured during the year ended December 31, 2012 by primary type of concession (in thousands):
	Year Ended December 31, 2012
	Accruing				Nonaccrual																Total
	Combination & Other				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				875				—				—				875				875
Wholesale/retail	—				885				—				—				885				885
Manufacturing	—				—				—				—				—				—
Healthcare	—				—				—				64				64				64
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				—				—				—				—				—
Total commercial	—				1,760				—				64				1,824				1,824
Commercial real estate:
Residential construction and land development	—				1,219				8,359				—				9,578				9,578
Retail	—				2,379				—				—				2,379				2,379
Office	—				1,350				570				—				1,920				1,920
Multifamily	—				—				—				—				—				—
Industrial	—				—				—				—				—				—
Other real estate loans	—				—				1,573				—				1,573				1,573
Total commercial real estate	—				4,948				10,502				—				15,450				15,450
Residential mortgage:
Permanent mortgage	—				1,214				—				2,518				3,732				3,732
Permanent mortgage guaranteed by U.S. government agencies	17,398				—				—				—				—				17,398
Home equity	—				—				—				—				—				—
Total residential mortgage	17,398				1,214				—				2,518				3,732				21,130
Consumer:
Indirect automobile	—				—				—				—				—				—
Other consumer	—				223				—				2,508				2,731				2,731
Total consumer	—				223				—				2,508				2,731				2,731
Total	$	17,398			$	8,145			$	10,502			$	5,090			$	23,737			$	41,135
The following table summarizes, by loan class, the recorded investment at December 31, 2013 and 2012, respectively of loans modified as TDRs within the previous 12 months and for which there was a payment default during the years ended December 31, 2013 and 2012, respectively (in thousands):
	Year Ended
	31-Dec-13												31-Dec-12
	Accruing				Nonaccrual				Total				Accruing				Nonaccrual				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				1,080				1,080				—				875				875
Wholesale/retail	—				—				—				—				885				885
Manufacturing	—				391				391				—				—				—
Healthcare	—				—				—				—				—				—
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				164				164				—				—				—
Total commercial	—				1,635				1,635				—				1,760				1,760
Commercial real estate:
Residential construction and land development	—				—				—				—				2,000				2,000
Retail	—				486				486				—				2,379				2,379
Office	—				2,819				2,819				—				1,350				1,350
Multifamily	—				—				—				—				—				—
Industrial	—				—				—				—				—				—
Other real estate loans	—				517				517				—				—				—
Total commercial real estate	—				3,822				3,822				—				5,729				5,729
Residential mortgage:
Permanent mortgage	—				586				586				—				2,692				2,692
Permanent mortgage guaranteed by U.S. government agencies	23,918				—				23,918				17,251				—				17,251
Home equity	—				590				590				—				—				—
Total residential mortgage	23,918				1,176				25,094				17,251				2,692				19,943
Consumer:
Indirect automobile	—				115				115				—				—				—
Other consumer	—				40				40				—				462				462
Total consumer	—				155				155				—				462				462
Total	$	23,918			$	6,788			$	30,706			$	17,251			$	10,643			$	27,894
A payment default is defined as being 30 days or more past due. The table above includes loans that experienced a payment default during the period, but may be performing in accordance with the modified terms as of the balance sheet date.
Nonaccrual & Past Due Loans
Past due status for all loan classes is based on the actual number of days since the last payment was due according to the contractual terms of the loans.
A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of December 31, 2013 is as follows (in thousands):
						Past Due
		Current				30 to 89				90 Days				Nonaccrual				Total
						Days				or More
Commercial:
Energy		$	2,347,267			$	2,483			$	150			$	1,860			$	2,351,760
Services		2,276,036				1,210				42				4,922				2,282,210
Wholesale/retail		1,193,905				338				152				6,969				1,201,364
Manufacturing		391,159				—				—				592				391,751
Healthcare		1,272,660				—				—				1,586				1,274,246
Integrated food services		150,494				—				—				—				150,494
Other commercial and industrial		290,479				81				5				831				291,396
Total commercial		7,922,000				4,112				349				16,760				7,943,221
Commercial real estate:
Residential construction and land development		188,434				428				19				17,377				206,258
Retail		580,926				264				—				4,857				586,047
Office		404,505				603				—				6,391				411,499
Multifamily		576,495				—				—				7				576,502
Industrial		243,625				—				—				252				243,877
Other real estate loans		376,699				1,493				1,012				11,966				391,170
Total commercial real estate		2,370,684				2,788				1,031				40,850				2,415,353
Residential mortgage:
Permanent mortgage		1,018,670				9,795				—				34,279				1,062,744
Permanent mortgages guaranteed by U.S. government agencies		21,916				17,290				141,615				777				181,598
Home equity		797,299				3,087				34				7,264				807,684
Total residential mortgage		1,837,885				30,172				141,649				42,320				2,052,026
Consumer:
Indirect automobile		5,466				330				—				717				6,513
Other consumer		373,951				697				1				502				375,151
Total consumer		379,417				1,027				1				1,219				381,664
Total		$	12,509,986			$	38,099			$	143,030			$	101,149			$	12,792,264
A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of December 31, 2012 is as follows (in thousands):
						Past Due
		Current				30 to 89				90 Days				Nonaccrual				Total
						Days				or More
Commercial:
Energy		$	2,454,928			$	3,071			$	200			$	2,460			$	2,460,659
Services		2,150,386				1,710				—				12,090				2,164,186
Wholesale/retail		1,103,307				5				50				3,077				1,106,439
Manufacturing		346,442				35				—				2,007				348,484
Healthcare		1,077,022				1,040				178				3,166				1,081,406
Integrated food services		190,416				6				—				684				191,106
Other commercial and industrial		288,522				127				—				983				289,632
Total commercial		7,611,023				5,994				428				24,467				7,641,912
Commercial real estate:
Residential construction and land development		226,962				—				—				26,131				253,093
Retail		514,252				349				68				8,117				522,786
Office		417,866				3,177				—				6,829				427,872
Multifamily		400,151				39				—				2,706				402,896
Industrial		242,026				—				—				3,968				245,994
Other real estate loans		358,030				2,092				3,361				12,875				376,358
Total commercial real estate		2,159,287				5,657				3,429				60,626				2,228,999
Residential mortgage:
Permanent mortgage		1,075,687				8,366				49				39,863				1,123,965
Permanent mortgages guaranteed by U.S. government agencies		26,560				13,046				120,349				489				160,444
Home equity		752,100				2,275				—				6,256				760,631
Total residential mortgage		1,854,347				23,687				120,398				46,608				2,045,040
Consumer:
Indirect automobile		31,869				1,273				15				1,578				34,735
Other consumer		358,308				1,327				4				1,131				360,770
Total consumer		390,177				2,600				19				2,709				395,505
Total		$	12,014,834			$	37,938			$	124,274			$	134,410			$	12,311,456

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Premises and Equipment Disclosure [Text Block]	'
	(5) Premises and Equipment
	Premises and equipment at December 31 are summarized as follows (in thousands):
		December 31,
		2013		2012
	Land	$	75,859	$	73,616
	Buildings and improvements	221,326		214,116
	Software	103,473		89,183
	Furniture and equipment	163,013		158,020
	Construction in progress	31,027		30,408
	Subtotal	594,698		565,343
	Less accumulated depreciation	316,849		299,423
	Total	$	277,849	$	265,920
	Depreciation expense of premises and equipment was $30 million, $33 million and $32 million for the years ended December 31, 2013, 2012 and 2011, respectively.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	On August 15, 2012, the Company acquired a majority voting interest in a Delaware limited liability corporation and its wholly-owned subsidiary, a Tulsa-based aircraft parts supplier and repair facility. This company divested a portion of its business in 2013, included associated goodwill.
	On August 19, 2012, the Company acquired The Milestone Group, Inc. ("Milestone"), a Denver-based Registered Investment Adviser that provides wealth management services to high net worth customers in Colorado and Nebraska.
	The purchase price for these acquisitions totaled $37 million, including $24 million paid in cash and $13 million of contingent consideration. The purchase price allocation included $21 million of identifiable intangible assets and $29 million of goodwill.
	The following table presents the original cost and accumulated amortization of intangible assets (in thousands):
		December 31,
		2013			2012
	Core deposit premiums	$	33,749		$	33,749
	Less accumulated amortization	32,656			32,180
	Net core deposit premiums	1,093			1,569
	Other identifiable intangible assets	37,992			38,191
	Less accumulated amortization	14,521			11,568
	Net other identifiable intangible assets	23,471			26,623
	Total intangible assets, net	$	24,564		$	28,192
	The net amortized cost of identifiable intangible assets assigned to the Company’s geographic markets as follows (in thousands):
		December 31,
		2013			2012
	Core deposit premiums:
	Texas	$	816		$	1,192
	Colorado	277			377
	Arizona	—			—
	Total core deposit premiums	$	1,093		$	1,569
	Other identifiable intangible assets:
	Oklahoma	9,199			9,857
	Colorado	13,482			15,976
	Kansas/Missouri	790			790
	Total other identifiable intangible assets	23,471			26,623
	Total intangible assets, net	$	24,564		$	28,192
	Expected amortization expense for intangible assets that will continue to be amortized (in thousands):
		Core			Other			Total
		Deposit			Identifiable
		Premiums			Intangible Assets
	2014	$	432		$	2,290		$	2,722
	2015	393			2,290			2,683
	2016	247			2,290			2,537
	2017	21			2,059			2,080
	2018	—			1,595			1,595
	Thereafter	—			12,947			12,947
		$	1,093		$	23,471		$	24,564
	Goodwill assigned to the Company’s geographic markets as follows (in thousands):
		December 31,
		2013			2012
	Goodwill:
	Oklahoma	$	10,387		$	12,607
	Texas	240,122			240,122
	New Mexico	15,273			15,273
	Colorado	77,555			77,555
	Arizona	16,422			16,422
	Total goodwill	$	359,759		$	361,979
	The changes in the carrying value of goodwill by operating segment for year ended December 31, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth		Total
								Management
	Balance, December 31, 2011
	Goodwill	$	266,728		$	39,251		$	29,850	$	335,829
	Accumulated impairment losses	—			(228		)	—		(228		)
		266,728			39,023			29,850		335,601
	Goodwill acquired during 2012	4,434			—			21,944		26,378
	Balance, December 31, 2012
	Goodwill	271,162			39,251			51,794		362,207
	Accumulated impairment losses	—			(228		)	—		(228		)
		271,162			39,023			51,794		361,979
	Goodwill adjustments during 2013	(2,220		)	—			—		(2,220		)
	Balance, December 31, 2013
	Goodwill	268,942			39,251			51,794		359,987
Accumulated Impairment	—			(228		)	—		(228		)
	$	268,942		$	39,023		$	51,794	$	359,759
The annual goodwill evaluations for 2013 and 2012 did not indicate impairment for any reporting unit. Economic conditions did not indicate that impairment existed for any identifiable intangible assets and therefore no impairment evaluation was performed.

Mortgage_Banking_Activities_Mo

Mortgage Banking Activities Mortgage Banking Activities (Notes)	12 Months Ended
	Dec. 31, 2013
Mortgage Banking [Abstract]	'
Mortgage Banking Activities [Text Block]	'
	(7) Mortgage Banking Activities
	Residential Mortgage Loan Production
	The Company originates, markets and services conventional and government-sponsored residential mortgage loans. Generally, conforming fixed rate residential mortgage loans are held for sale in the secondary market and non-conforming and adjustable-rate residential mortgage loans are held for investment. All residential mortgage loans originated for sale by the Company are carried at fair value based on sales commitments and market quotes. Changes in the fair value of mortgage loans held for sale are included in Other operating revenue – Mortgage banking revenue. Residential mortgage loans held for sale also includes the fair value of residential mortgage loan commitments and forward sale commitments which are considered derivative contracts that have not been designated as hedging instruments. The volume of mortgage loans originated for sale and secondary market prices are the primary drivers of originating and marketing revenue.
	Residential mortgage loan commitments are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Residential mortgage loan commitments are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales of residential mortgage-backed securities and forward sales contracts. These latter contracts set the price for loans that will be delivered in the next 60 to 90 days.
	The unpaid principal balance of residential mortgage loans held for sale, notional amounts of derivative contracts related to residential mortgage loans commitments and forward contract sales and their related fair values included in Mortgage loans held for sale on the Consolidated Balance Sheets were (in thousands):
			December 31, 2013								December 31, 2012
			Unpaid Principal Balance/				Fair Value				Unpaid Principal Balance/			Fair Value
			Notional								Notional
	Residential mortgage loans held for sale		$	192,266			$	193,584			$	269,718		$	281,935
	Residential mortgage loan commitments		258,873				2,656				356,634			12,733
	Forward sales contracts		435,867				4,306				598,442			(906		)
							$	200,546						$	293,762
	No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of December 31, 2013 or December 31, 2012. No credit losses were recognized on residential mortgage loans held for sale for years ended December 31, 2013, 2012 and 2011.
	Mortgage banking revenue was as follows (in thousands):
			Year Ended
			2013				2012				2011
	Originating and marketing revenue:
	Residential mortgage loans held for sale		$	84,403			$	120,599			$	57,418
	Residential mortgage loan commitments		(10,070		)		6,136				4,345
	Forward sales contracts		5,212				2,382				(9,781		)
	Total originating and marketing revenue		79,545				129,117				51,982
	Servicing revenue		42,389				40,185				39,661
	Total mortgage banking revenue		$	121,934			$	169,302			$	91,643
	Originating and marketing revenue includes gain (loss) on residential mortgage loans held for sale and changes in the fair value of derivative contracts not designated as hedging instruments related to residential mortgage loan commitments and forward sales contracts. Servicing revenue includes servicing fee income and late charges on loans serviced for others.
	Residential Mortgage Servicing
	Mortgage servicing rights may be recognized when mortgage loans are originated pursuant to an existing plan for sale or, if no such plan exists, when the mortgage loans are sold. Mortgage servicing rights may also be purchased. Both originated or purchased mortgage servicing rights are initially recognized at fair value. The Company has elected to carry all mortgage servicing rights at fair value. Changes in the fair value are recognized in earnings as they occur. The unpaid principal balance of loans serviced for others is the primary driver of servicing revenue.
	The following represents a summary of mortgage servicing rights (Dollars in thousands):
			December 31,
			2013				2012				2011
	Number of residential mortgage loans serviced for others		106,137				98,246				95,841
	Outstanding principal balance of residential mortgage loans serviced for others		$	13,718,942			$	11,981,624			$	11,300,986
	Weighted average interest rate		4.4		%		4.71		%		5.19		%
	Remaining term (in months)		292				289				290
	Activity in capitalized mortgage servicing rights during the three years ended December 31, 2013 is as follows (in thousands):
			Purchased				Originated				Total
	Balance, December 31, 2010		$	37,900			$	77,823			$	115,723
	Additions, net		—				26,251				26,251
	Change in fair value due to loan runoff		(4,699		)		(10,045		)		(14,744		)
	Change in fair value due to market changes		(14,298		)		(26,149		)		(40,447		)
	Balance, December 31, 2011		$	18,903			$	67,880			$	86,783
	Additions, net		—				42,191				42,191
	Change in fair value due to loan runoff		(4,164		)		(14,788		)		(18,952		)
	Change in fair value due to market changes		(1,763		)		(7,447		)		(9,210		)
	Balance, December 31, 2012		$	12,976			$	87,836			$	100,812
	Additions, net		—				49,431				49,431
	Change in fair value due to loan runoff		(3,029		)		(16,601		)		(19,630		)
	Change in fair value due to market changes		5,988				16,732				22,720
	Balance, December 31, 2013		$	15,935			$	137,398			$	153,333
	Changes in the fair value of mortgage servicing rights are included in Other operating revenue in the Consolidated Statements of Earnings. Changes in fair value due to loan runoff are included in Mortgage banking costs. Changes in fair value due to market changes are reported separately. Changes in fair value due to market changes during the period relate to assets held at the reporting date.
	There is no active market for trading in mortgage servicing rights after origination. Fair value is determined by discounting the projected net cash flows. Significant assumptions used to determine fair value considered to be significant unobservable inputs were as follows:
			December 31,
			2013		2012
	Discount rate – risk-free rate plus a market premium		10.21%		10.29%
	Prepayment rate – based upon loan interest rate, original term and loan type		6.66% - 26.19%		8.38% - 43.94%
	Loan servicing costs – annually per loan based upon loan type:
	Performing loans		$60 - $105		$55 - $105
	Delinquent loans		$150 - $500		$135 - $500
	Loans in foreclosure		$1,000 - $4,250		$875 - $4,250
	Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life		1.80%		0.87%
	The Company is exposed to interest rate risk as benchmark residential mortgage interest rates directly affect the prepayment speeds used in valuing our mortgage servicing rights, which is partially managed through forward sales of residential mortgage-backed securities and forward sales contracts. A separate third party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated daily for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial’s servicing portfolio.
	Stratification of the residential mortgage loan servicing portfolio and outstanding principal of loans serviced for others by interest rate at December 31, 2013 follows (in thousands):
			< 4.00%				4.00% - 4.99%				5.00% - 5.99%			> 5.99%			Total
	Fair value		$	62,962			$	55,721			$	27,446		$	7,204		$	153,333
Outstanding principal of loans serviced for others		$	5,454,084			$	4,711,703			$	2,350,924		$	1,202,231		$	13,718,942
Weighted average prepayment rate1		6.66		%		7.85		%		9.93		%	26.19		%	9.34		%
1	Annual prepayment estimates based upon loan interest rate, original term and loan type. Weighted average prepayment rate is determined by weighting the prepayment speed for each loan by its unpaid principal balance.
The interest rate sensitivity of our mortgage servicing rights and securities and derivative contracts held as an economic hedge is modeled over a range of +/- 50 basis points. At December 31, 2013, a 50 basis point increase in mortgage interest rates is expected to increase the fair value of our mortgage servicing rights, net of economic hedge by $2.1 million. A 50 basis point decrease in mortgage interest rates is expected to decrease the fair value of our mortgage servicing rights, net of economic hedge by $2.3 million. In the model, changes in the value of servicing rights due to changes in interest rates assume stable relationships between residential mortgage rates and prepayment speeds. Changes in market conditions can cause variations from these assumptions. These factors and others may cause changes in the value of our mortgage servicing rights to differ from our expectations.
The aging status of our mortgage loans serviced for others by investor at December 31, 2013 follows (in thousands):
						Past Due
		Current				30 to 59				60 to 89			90 Days or More			Total
						Days				Days
FHLMC		$	4,557,381			$	42,359			$	10,926		$	36,890		$	4,647,556
FNMA		4,111,774				26,284				7,828			20,658			4,166,544
GNMA		4,475,016				149,707				43,702			18,113			4,686,538
Other		211,308				1,871				547			4,578			218,304
Total		$	13,355,479			$	220,221			$	63,003		$	80,239		$	13,718,942
The Company has off-balance sheet credit risk related to residential mortgage loans sold to U.S. government agencies with recourse prior to 2008 under various community development programs. These loans consist of first lien, fixed-rate residential mortgage loans underwritten to standards approved by the agencies including full documentation and originated under programs available only for owner-occupied properties. However, these loans have a higher risk of delinquency and loss given default than traditional residential mortgage loans. The Company no longer sells residential mortgage loans with recourse other than obligations under standard representations and warranties. The recourse obligation relates to loan performance for the life of the loan and the Company is obligated to repurchase the loan at the time of foreclosure for the unpaid principal balance plus unpaid interest. The principal balance of residential mortgage loans sold subject to recourse obligations totaled $191 million at December 31, 2013 and $227 million at December 31, 2012. At December 31, 2013, approximately 4% of the loans sold with recourse with an outstanding principal balance of $6.7 million were either delinquent more than 90 days, in bankruptcy or in foreclosure and 6% with an outstanding balance of $12 million were past due 30 to 89 days. A separate accrual for these off-balance sheet commitments is included in Other liabilities in the Consolidated Balance Sheets. The provision for credit losses on loans sold with recourse is included in Mortgage banking costs in the Consolidated Statements of Earnings.
The activity in the accrual for losses on loans sold with recourse included in Other liabilities in the Consolidated Balance Sheets is summarized as follows (in thousands):
	Year Ended
	2013				2012				2011
Beginning balance	$	11,359			$	18,683			$	16,667
Provision for recourse losses	565				(1,891		)		8,611
Loans charged off, net	(2,883		)		(5,433		)		(6,595		)
Ending balance	$	9,041			$	11,359			$	18,683
The Company also has off-balance sheet obligation to repurchase or provide indemnification for residential mortgage loans sold to government sponsored entities due to standard representations and warranties made under contractual agreements.The Company has established an accrual for credit losses related to potential loan repurchases under representations and warranties that is included in Other liabilities in the Consolidated Balance Sheets and in Mortgage banking costs in the Consolidated Statements of Earnings. For 2013, the Company has repurchased 19 loans from the agencies for $2.1 million and recognized $333 thousand of related losses. In addition, the Company has paid indemnification for 14 loans and recognized $453 thousand of related losses during 2013.
A summary of unresolved deficiency requests from the agencies and related accrual for credit losses follows (Dollars in thousands):
	December 31,
	2013				2012
Number of unresolved deficiency requests	578				389
Aggregate outstanding principal balance subject to unresolved deficiency requests	$	69,288			$	44,831
Unpaid principal balance subject to indemnification by the Company	3,200				1,233
Accrual for credit losses related to potential loan repurchases under representations and warranties	8,845				5,291

Deposits

Deposits	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Deposits [Text Block]	'
	(8) Deposits
	Interest expense on deposits is summarized as follows (in thousands):
		December 31,
		2013		2012		2011
	Transaction deposits	$	11,155	$	14,300	$	23,415
	Savings	442		540		719
	Time:
	Certificates of deposits under $100,000	16,234		19,150		26,476
	Certificates of deposits $100,000 and over	12,273		16,331		21,175
	Other time deposits	15,460		16,692		17,105
	Total time	43,967		52,173		64,756
	Total	$	55,564	$	67,013	$	88,890
	The aggregate amounts of time deposits in denominations of $100,000 or more at December 31, 2013 and 2012 were $1.8 billion and $1.9 billion, respectively.
	Time deposit maturities are as follows:  2014 – $1.2 billion, 2015 – $456 million, 2016 – $329 million, 2017 – $167 million, 2018 – $204 million and $309 million thereafter. At December 31, 2013 and 2012, the Company had $186 million and $187 million, respectively, in fixed rate, brokered certificates of deposits. The weighted-average interest rate paid on these certificates was 2.96% in 2013 and 3.17% in 2012.
	The aggregate amount of overdrawn transaction deposits that have been reclassified as loan balances was $37 million at December 31, 2013 and $9.2 million at December 31, 2012.

Other_Borrowings

Other Borrowings	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Other borrowings [Text Block]	'
	(9) Other Borrowings
	Information relating to other borrowings is summarized as follows (dollars in thousands):
			As of				Year Ended
			December 31, 2013				December 31, 2013
			Balance		Rate		Average Balance			Rate			Maximum
													Outstanding
													At Any
													Month End
	Parent Company and Other Non-Bank Subsidiaries:
	Other		$	—	—	%	$	326		—	%		$	—
	Total Parent Company and Other Non-Bank Subsidiaries		—				326			—
	Subsidiary Bank:
	Funds purchased		868,081		0.04		866,062			0.1			997,536
	Repurchase agreements		813,454		0.05		811,996			0.06			881,033
	Other borrowings:
	Federal Home Loan Bank advances		1,005,650		0.19		1,661,424			0.2			2,451,197
	GNMA repurchase liability		18,113		5.5		15,741			5.43			21,055
	Other		16,590		2.35		16,502			2.54			17,092
	Total other borrowings		1,040,353				1,693,667			0.27
	Subordinated debentures		347,802		5.11		347,717			2.51			347,802
	Total subsidiary bank		3,069,690				3,719,442			0.41
	Total other borrowed funds		$	3,069,690			$	3,719,768		0.4	%
			As of				Year Ended
			December 31, 2012				December 31, 2012
			Balance		Rate		Average Balance			Rate			Maximum
													Outstanding
													At Any
													Month End
	Parent Company and Other Non-Bank Subsidiaries:
	Other		$	10,500	1.5	%	$	394		1.11	%		$	10,500
	Total Parent Company and Other Non-Bank Subsidiaries		10,500				394			1.11
	Subsidiary Bank:
	Funds purchased		1,167,416		0.05		1,512,711			0.14			1,810,793
	Repurchase agreements		887,030		0.07		1,072,650			0.09			1,272,151
	Other borrowings:
	Federal Home Loan Bank advances		604,897		0.23		104,925			0.31			604,897
	GNMA repurchase liability		20,046		5.44		33,768			5.41			47,840
	Other		16,332		5.1		16,577			2.91			16,761
	Total other borrowings		641,275				155,270
	Subordinated debentures		347,633		2.4		363,699			3.79			398,897
	Total subsidiary bank		3,043,354				3,104,330			0.65
	Total other borrowings		$	3,053,854			$	3,104,724		0.65	%
			As of				Year Ended
			December 31, 2011				December 31, 2011
			Balance		Rate		Average Balance			Rate			Maximum
													Outstanding
													At Any
													Month End
	Parent Company and Other Non-Bank Subsidiaries:
	Trust preferred debt		$	—	—	%	$	7,093		6.42	%		$	8,763
	Other		—		—		—			—			—
	Total Parent Company and Other Non-Bank Subsidiaries		—				7,093			6.42
	Subsidiary Banks:
	Funds purchased		1,063,318		0.03		1,046,114			0.07			1,706,893
	Repurchase agreements		1,233,064		0.09		1,096,615			0.12			1,393,237
	Other borrowings:
	Federal Home Loan Bank advances		4,837		0.27		45,110			0.38			201,674
	GNMA repurchase liability		53,082		6.18		56,142			5.79			118,595
	Other		16,566		5.1		28,777			3.23			45,366
	Total other borrowings		74,485				130,029
	Subordinated debentures		398,881		5.47		398,790			5.74			398,881
	Total subsidiary banks		2,769,748				2,671,548			1.06
	Total other borrowings		$	2,769,748			$	2,678,641		1.17	%
Aggregate annual principal repayments at December 31, 2013 are as follows (in thousands):
		Parent		Subsidiary
		Company and Other Non-bank Subsidiaries		Bank
2014		$	—	$	2,705,823
2015		—		122,032
2016		—		525
2017		—		226,820
2018		—		575
Thereafter		—		13,915
Total		$	—	$	3,069,690
Funds purchased are unsecured and generally mature within one to ninety days from the transaction date. Securities repurchase agreements are recorded as secured borrowings that generally mature within ninety days and are secured by certain available for sale securities. There was no outstanding accrued interest payable related to repurchase agreements at December 31, 2013 or December 31, 2012.
Additional information relating to securities sold under agreements to repurchase and related liabilities at December 31, 2013 and 2012 is as follows (dollars in thousands):
		December 31, 2013
		Amortized		Market			Repurchase			Average
Security Sold/Maturity		Cost		Value			Liability1			Rate
U.S. Agency Securities:
Overnight1		$	1,085,893	$	1,075,821		$	813,624		0.05	%
Long-term		—		—			—			—	%
Total Agency Securities		$	1,085,893	$	1,075,821		$	813,624		0.05	%
		December 31, 2012
		Amortized		Market			Repurchase			Average
Security Sold/Maturity		Cost		Value			Liability1			Rate
U.S. Agency Securities:
Overnight1		$	1,213,593	$	1,242,314		$	877,382		0.07	%
Long-term		—		—			—			—	%
Total Agency Securities		$	1,213,593	$	1,242,314		$	877,382		0.07	%
1	BOK Financial maintains control over the securities underlying overnight repurchase agreements and generally transfers control over securities underlying longer-term dealer repurchase agreements to the respective counterparty.
Borrowings from the Federal Home Loan Banks are used for funding purposes. In accordance with policies of the Federal Home Loan Banks, BOK Financial has granted a blanket pledge of eligible assets (generally unencumbered U.S. Treasury and residential mortgage-backed securities, 1-4 family loans and multifamily loans) as collateral for these advances. The Federal Home Loan Banks have issued letters of credit totaling $297 million to secure BOK Financial’s obligations to depositors of public funds. The unused credit available to BOK Financial at December 31, 2013 pursuant to the Federal Home Loan Bank’s collateral policies is $2.3 billion.
The Company has a $100 million senior unsecured 364 day revolving credit facility with Wells Fargo Bank, National Association, administrative agent and other commercial banks (“the Credit Facility”). Interest on amounts outstanding under the Credit Facility is to be paid at a defined base rate minus 1.25% or LIBOR plus 1.00% based upon the Company’s option. Interest on amounts borrowed for certain acquisitions converted to a term loan at the Company's option is to be paid at a defined base rate minus 1.25% or LIBOR plus 1.25%. A commitment fee equal to 0.20% shall be paid quarterly on the unused portion of the credit commitment under the Credit Facility and there are no prepayment penalties. Any amounts outstanding at the end of the Credit Facility term shall be converted into a term loan which, except for amounts borrowed for certain acquisitions, shall be payable June 5, 2014. The Credit Facility contains customary representations and warranties, as well as affirmative and negative covenants, including limits on the Company’s ability to borrow additional funds, make investments or sell assets. These covenants also require BOKF to maintain minimum capital levels. At December 31, 2013, no amounts were outstanding under the Credit Facility and the Company met all of the covenants.
BOSC, Inc. has a borrowing agreement with Bank of New York Mellon ("BNY") to provide additional funding for its trading activities. Fundings are at the discretion of BNY with the amount of the advance and interest rate are negotiated at the time of the funding request. Fundings are fully secured by the qualifying securities and payable on demand. At December 31, 2012, no amounts was outstanding under this borrowing agreement at December 31, 2013 and $10.5 million was outstanding at December 31, 2012.
In 2007, the Bank issued $250 million of subordinated debt due May 15, 2017. Interest on this debt was based upon a fixed rate of 5.75% through May 14, 2012 and is based on a floating rate of three-month LIBOR plus 0.69% thereafter. The proceeds of this debt were used to fund the Worth National Bank and First United Bank acquisitions and to fund continued asset growth. At December 31, 2013, and December 31, 2012 $227 million of this subordinated debt remained outstanding.
In 2005, the Bank issued $150 million of fixed rate subordinated debt due June 1, 2015. The cost of this subordinated debt, including issuance discounts and hedge loss is 5.56%. The proceeds of this debt were used to repay the unsecured revolving line of credit and to provide additional capital to support asset growth. During 2006, an interest rate swap was designated as a hedge of changes in fair value of the subordinated debt due to changes in interest rates. The Company received a fixed rate of interest and paid a variable rate based on 1-month LIBOR. This fair value hedging relationship was discontinued and the interest rate swap was terminated in April 2007. At December 31, 2013 and December 31, 2012, $122 million of this subordinated debt remains outstanding.
The Company has a liability related to the repurchase of certain delinquent residential mortgage loans previously sold into GNMA mortgage pools. Interest is payable at rates contractually due to investors.

Federal_and_State_Income_Taxes

Federal and State Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Federal and State Income Taxes	'
	(10) Federal and State Income Taxes
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of deferred tax assets and liabilities are as follows (in thousands):
		December 31,
		2013				2012
	Deferred tax assets:
	Available for sale securities mark to market	$	14,700			$	—
	Stock-based compensation	8,100				9,100
	Credit loss allowances	75,600				86,100
	Valuation adjustments	35,300				45,100
	Deferred book income	3,500				7,200
	Deferred compensation	60,100				45,100
	Other	29,500				31,300
	Total deferred tax assets	226,800				223,900
	Deferred tax liabilities:
	Available for sale securities mark to market	—				99,000
	Depreciation	17,300				19,600
	Mortgage servicing rights	72,200				59,500
	Lease financing	23,200				21,100
	Other	18,500				21,700
	Total deferred tax liabilities	131,200				220,900
	Deferred tax assets in excess of deferred tax liabilities	$	95,600			$	3,000
	The significant components of the provision for income taxes attributable to continuing operations for BOK Financial are shown below (in thousands):
		Year Ended December 31,
		2013				2012				2011
	Current income tax expense:
	Federal	$	125,412			$	159,706			$	137,802
	State	14,381				19,103				16,085
	Total current income tax expense	139,793				178,809				153,887
	Deferred income tax expense:
	Federal	15,915				8,664				3,882
	State	1,590				1,267				742
	Total deferred income tax expense	17,505				9,931				4,624
	Total income tax expense	$	157,298			$	188,740			$	158,511
	The reconciliations of income (loss) attributable to continuing operations at the U.S. federal statutory tax rate to income tax expense are as follows (in thousands):
		Year Ended December 31,
		2013				2012				2011
	Amount:
	Federal statutory tax	$	166,680			$	190,003			$	156,917
	Tax exempt revenue	(7,361		)		(5,558		)		(5,357		)
	Effect of state income taxes, net of federal benefit	10,937				13,684				11,198
	Utilization of tax credits	(8,145		)		(5,126		)		(2,972		)
	Bank-owned life insurance	(3,596		)		(3,850		)		(3,879		)
	Reduction of tax accrual	(1,400		)		(950		)		(1,764		)
	Other, net	183				537				4,368
	Total	$	157,298			$	188,740			$	158,511
	Due to the favorable resolution of certain tax issues for the periods ended December 31, 2009 and 2008, BOK Financial reduced its tax accrual by $1.4 million and $1.0 million in 2013 and 2012, respectively, which was credited against current income tax expense.
		Year Ended December 31,
		2013			2012			2011
	Percent of pretax income:
	Federal statutory tax	35	%		35	%		35	%
	Tax exempt revenue	(1	)		(1	)		(1	)
	Effect of state income taxes, net of federal benefit	2			3			2
	Utilization of tax credits	(2	)		(1	)		(1	)
	Bank-owned life insurance	(1	)		(1	)		(1	)
	Reduction of tax accrual	—			—			—
	Other, net	—			—			1
	Total	33	%		35	%		35	%
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):
		2013				2012				2011
	Balance as of January 1	$	12,275			$	12,230			$	11,900
	Additions for tax for current year positions	2,730				3,976				6,390
	Settlements during the period	—				(1,000		)		(2,510		)
	Lapses of applicable statute of limitations	(2,947		)		(2,931		)		(3,550		)
Balance as of December 31	$	12,058			$	12,275			$	12,230
Any of the above unrecognized tax benefits, if recognized, would affect the effective tax rate.
BOK Financial recognizes interest and penalties accrued related to unrecognized tax benefits in income tax expense. The Company recognized $1.2 million for 2013, $1.2 million for 2012 and $1.9 million for 2011 in interest and penalties. The Company had approximately $2.9 million accrued for the payment of interest and penalties at December 31, 2013 and 2012. Federal statutes remain open for federal tax returns filed in the previous three reporting periods. Various state income tax statutes remain open for the previous three to six reporting periods.
The Internal Revenue Service completed an audit of the Company's federal income tax return for the year ended December 31, 2008 during the first quarter 2012 with no adjustments. The Internal Revenue Service also completed its audit of the Company’s 2008 refund claim during the first quarter of 2013 with no adjustments.

Employee_Benefits

Employee Benefits	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefits [Text Block]	'
	(11) Employee Benefits
	BOK Financial sponsors a defined benefit cash balance Pension Plan for all employees who satisfy certain age and service requirements. Pension Plan benefits were curtailed as of April 1, 2006. No participants may be added to the plan and no additional service benefits will be accrued. During 2012, interest accrued on employees’ account balances at 5.25%. During 2013, interest accrued on employees' account balances at a variable rate tied to the five-year trailing average of five-year Treasury Securities plus 1.5%. The rate has a floor of 2.5% and a ceiling of 5.0%. The 2013 quarterly variable rates ranged from 3.07% to 3.27%.
	The following table presents information regarding this plan (in thousands):
			December 31,
			2013				2012
	Change in projected benefit obligation:
	Projected benefit obligation at beginning of year		$	48,028			$	50,213
	Interest cost		1,532				1,925
	Actuarial (gain) loss		(1,543		)		2,786
	Benefits paid		(3,252		)		(2,194		)
	Plan amendments		$	—			(4,702		)
	Projected benefit obligation at end of year1,2		$	44,765			$	48,028
	Change in plan assets:
	Plan assets at fair value at beginning of year		$	45,920			$	43,859
	Actual return on plan assets		6,144				4,255
	Benefits paid		(3,252		)		(2,194		)
	Plan assets at fair value at end of year		$	48,812			$	45,920
	Funded status of the plan		$	4,047			$	(2,108	)
	Components of net periodic benefit costs:
	Interest cost		$	1,532			$	1,925
	Expected return on plan assets		(2,185		)		(2,062		)
	Recognized prior service cost		(1,175		)		—
	Amortization of unrecognized net loss		3,830				3,461
	Net periodic pension cost		$	2,002			$	3,324
	1	Projected benefit obligation equals accumulated benefit obligation.
	2	Projected benefit obligation is based on January 1 measurement date.
	Weighted-average assumptions as of December 31:		2013			2012
	Discount rate		4.05	%		3.36	%
	Expected return on plan assets		6	%		5.25	%
	As of December 31, 2013, expected future benefit payments related to the Pension Plan were as follows (in thousands):
	2014	$	3,886
	2015	3,713
	2016	3,386
	2017	3,351
	2018	3,488
	Thereafter	40,394
		$	58,218
	Assets of the Pension Plan consist primarily of shares in the Cavanal Hill Balanced Fund. The stated objective of this fund is to provide an attractive total return through a broadly diversified mix of equities and bonds. The typical portfolio mix is approximately 60% equities and 40% bonds. The net asset value of shares in the Cavanal Hill Funds is reported daily based on market quotations for the Fund’s securities. If market quotations are not readily available, the securities’ fair values are determined by the Fund’s pricing committee. The inception-to-date return on the fund, which is used as an indicator when setting the expected return on plan assets, was 7.34%. As of December 31, 2013, the expected return on plan assets for 2013 is 6.00%. The maximum allowed Pension Plan contribution for 2013 was $23 million. No minimum contribution was required for 2013, 2012 or 2011. We expect approximately $0.6 million of net pension costs currently in accumulated other comprehensive income to be recognized as net periodic pension cost in 2014.
	Employee contributions to the Thrift Plan are eligible for Company matching equal to 6% of base compensation, as defined in the plan. The Company-provided matching contribution rates range from 50% for employees with less than four years of service to 200% for employees with 15 or more years of service. Additionally, a maximum Company-provided, non-elective annual contribution of up to $750 is made for employees whose annual base compensation is less than $40,000. Total non-elective contributions were $738 thousand for 2013, $802 thousand for 2012 and $933 thousand for 2011.
	Participants may direct investments in their accounts to a variety of options, including a BOK Financial common stock fund. Employer contributions, which are invested in accordance with the participant’s investment options, vest over five years. Thrift Plan expenses were $18.1 million for 2013, $16.8 million for 2012 and $15.4 million for 2011.
	BOK Financial offers numerous incentive compensation plans that are aligned with the Company’s growth strategy. Compensation awarded under these plans may be based on defined formulas, other performance criteria or discretionary. Incentive compensation is designed to motivate and reinforce sales and customer service behavior in all markets. Earnings were charged $151.1 million in 2013, $153.9 million in 2012, and $117.8 million in 2011 for incentive compensation plans.

Stock_Compensation_Plans

Stock Compensation Plans	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Compensation Plans [Text Block]	'
	(12) Stock Compensation Plans
	The shareholders and Board of Directors of BOK Financial have approved various stock-based compensation plans. An independent compensation committee of the Board of Directors determines the number of awards granted to the Chief Executive Officer and other senior executives. Stock-based compensation is granted to other officers and employees as determined by the Chief Executive Officer.
	These awards include stock options subject to vesting requirements and non-vested shares. Generally, one-seventh of the options awarded vest annually and expire 3 years after vesting. Additionally, stock options that vest in two years and expire 45 days after vesting have been awarded. Non-vested shares vest 3 to 5 years after the grant date. The holders of these non-vested shares may be required to retain the shares for 2 years after vesting.
	The Chief Executive Officer and other senior executives participate in an Executive Incentive Plan ("EIP"). The number of options and non-vested shares may increase or decrease based upon the Company’s growth in earnings per share over a three-year period compared to the median growth in earnings per share for a designated peer group of financial institutions and other individual performance factors.
	The following table presents stock options outstanding during 2013, 2012 and 2011 under these plans (in thousands, except for per share data):
			Number			Weighted-		Aggregate
						Average		Intrinsic
						Exercise		Value
						Price
	Options outstanding at December 31, 2010		3,135,334			$45.62		$	24,405
	Options awarded		185,007			55.94
	Options exercised		(576,518	)		44.35
	Options forfeited		(60,005	)		47.93
	Options expired		(62,471	)		54.13
	Options outstanding at December 31, 2011		2,621,347			$47.01		$	20,769
	Options awarded		67,155			58.76
	Options exercised		(708,295	)		45.32
	Options forfeited		(22,559	)		50.36
	Options expired		(66,862	)		45.97
	Options outstanding at December 31, 2012		1,890,786			$48.29		$	11,748
	Options awarded		81,492			55.74
	Options exercised		(608,663	)		48
	Options forfeited		(219,342	)		47.65
	Options expired		(9,168	)		50.61
	Options outstanding at December 31, 2013		1,135,105			$49.09		$	19,564
	Options vested at:
	December 31, 2011		825,682			$46.72		$	6,779
	December 31, 2012		601,367			47.99		3,890
	December 31, 2013		424,459			49.49		7,146
	The following table summarizes information concerning currently outstanding and vested stock options:
	Options Outstanding									Options Vested
						Weighted								Weighted
						Average		Weighted					Weighted	Average
	Range of					Remaining		Average					Average	Remaining
	Exercise		Number			Contractual		Exercise		Number			Exercise	Contractual
	Prices		Outstanding			Life (years)		Price		Vested			Price	Life (years)
	$37.74		1,267			0.02		$37.74		1,267			$37.74	0.02
	45.15 - 47.34		84,725			1.42		47.12		84,725			47.12	1.42
	54.33		134,485			2.11		54.33		74,447			54.33	1.37
	48.46		233,739			2.88		48.46		80,747			48.46	1.66
	55.94		214,483			2.99		55.94		102,311			55.94	0.74
	36.65		253,607			3.44		36.65		61,449			36.65	1.64
	48.3		47,581			3.84		48.3		11,007			48.3	1.51
	58.76		83,726			5.18		58.76		8,506			58.76	2.03
	55.74		81,492			6.03		55.74		—			—	0
	The aggregate intrinsic value of options exercised was $8.5 million for 2013, $8.3 million for 2012 and $5.5 million for 2011. Compensation expense for stock options is generally recognized based on the fair value of options granted over the options’ vesting period.
	The fair value of options was determined as of the date of grant using a Black-Scholes option pricing model with the following weighted average assumptions:
			2013				2012				2011
	Average risk-free interest rate1		0.89		%		0.93		%		1.87		%
	Dividend yield		2.8		%		2.2		%		1.8		%
	Volatility factors		0.272				0.28				0.268
	Weighted average expected life		4.9 years				4.9 years				4.9 years
	Weighted average fair value		$	9.67			$	11.48			$	11.92
	1	Average risk-free interest rate represents U.S. Treasury rates matched to the expected life of the options.
	Compensation expense recognized on stock options totaled $1.3 million for 2013, $4.1 million for 2012 and $4.3 million for 2011. Compensation cost of stock options granted that may be recognized as compensation expense in future years totaled $1.9 million at December 31, 2013. Subject to adjustments for forfeitures, we expect to recognize compensation expense for current outstanding options of $865 thousand in 2014, $504 thousand in 2015, $299 thousand in 2016, $166 thousand in 2017, $66 thousand in 2018 and $20 thousand thereafter.
	The following represents a summary of the non-vested stock awards as of December 31, 2013 (in thousands):
			Shares			Weighted
						Average
						Grant Date
						Fair Value
	Non-vested at January 1, 2013		592,831
	Granted		211,791			$55.84
	Lapsed		(66,648	)		35.93
Forfeited		(89,985	)		49.95
Non-vested at December 31, 2013		647,989
Compensation expense recognized on non-vested shares totaled $6.9 million for 2013, $5.6 million for 2012 and $5.7 million for 2011. Unrecognized compensation cost of non-vested shares totaled $15.3 million at December 31, 2013.  Subject to adjustment for forfeitures, we expect to recognize compensation expense of $7.0 million in 2014, $6.3 million in 2015, $1.8 million in 2016, $175 thousand in 2017 and none thereafter.
BOK Financial permits certain executive officers to defer recognition of taxable income from their stock-based compensation. Deferred compensation may also be diversified into investments other than BOK Financial common stock.
Stock-based compensation subject to these deferral plans is recognized as a liability award rather than as an equity award. Compensation expense is based on the fair value of the award recognized over the vesting period. The recorded obligation for liability awards totaled $120 thousand at December 31, 2013 and $87 thousand at December 31, 2012. Compensation cost of liability awards was an expense of $343 thousand in 2013, $530 thousand in 2012 and $760 thousand in 2011.
On April 26, 2011 shareholders approved the BOK Financial Corporation 2011 True-Up Plan. The True-Up Plan was intended to address inequality in the EIP which had been approved by shareholders in 2003 as a result of certain peer banks that performed poorly during the most recent economic cycle. Performance goals for the EIP are based on the Company's earnings per share growth compared to peers and business unit performance. As the economy improves and credit losses normalize, peer banks were expected to experience significant comparative earnings per share percentile increases. This "bounce-back" effect would have resulted in the unanticipated result of no annual bonuses in the years 2011, 2012 and 2013 and the forfeiture of long-term incentive awards for 2010 and 2011 in their entirety, despite BOK Financial's strong annual earnings growth through the economic cycle while many peers experienced negative or declining earnings. The True-Up Plan was designed to adjust annual and long-term performance-based incentive compensation for certain senior executives either upward or downward based on the earnings per share performance and compensation of comparable senior executives at peer banks for 2006 through 2013. Compensation expense is determined by ranking BOK Financial's earnings per share to peer banks and then aligning compensation with the peer bank that most closely relates to BOK Financial's earnings per share performance. Based on currently available information, the Company has accrued $69 million for the True-Up Plan liability. The final amount due under the 2011 True-Up Plan will be determined as of December 31, 2013 based on information that will be published by peer banks during the first quarter of 2014. The final amounts due under the 2011 True-Up Plan will be distributed in May, 2014.
During January 2014, BOK Financial awarded 206,546 share of non-vested stock with a fair value per award of $64.37. The aggregate compensation cost of these awards totaled approximately $13.3 million. This cost will be recognized over the vesting periods, subject to adjustments for forfeitures. Non-vested shares awarded in January, 2014 generally cliff vest in 3 years and are subject to a 2 year holding period after vesting.

Related_Parties

Related Parties	12 Months Ended
	Dec. 31, 2013
Related Party Transactions [Abstract]	'
Related Parties [Text Block]	'
	(13) Related Parties
	In compliance with applicable regulations, the Company may extend credit to certain executive officers, directors, principal shareholders and their affiliates (collectively referred to as “related parties”) in the ordinary course of business under substantially the same terms as comparable third-party lending arrangements. The Company’s loans to related parties do not involve more than the normal credit risk and there are no nonaccruing or impaired related party loans outstanding at December 31, 2013 or 2012.
	Activity in loans to related parties is summarized as follows (in thousands):
			Year Ended December 31,
			2013			2012
	Beginning balance		$	49,943		$	99,340
	Advances		292,393			644,715
	Payments		(253,645		)	(684,942		)
	Adjustments1		—			(9,170		)
	Ending balance		$	88,691		$	49,943
	1	Adjustments generally consist of changes in status as a related party.
	Certain related parties are customers of the Company for services other than loans, including consumer banking, corporate banking, risk management, wealth management, brokerage and trading, or fiduciary/trust services. The Company engages in transactions with related parties in the ordinary course of business in compliance with applicable regulations.
	The Company rents office space in facilities owned by affiliates of Mr. Kaiser, its Chairman and principal shareholder. Lease payments totaled $952 thousand for 2013, $1.1 million for 2012 and $1.1 million for 2011.
	In 2008, the Company entered into a $25 million loan commitment with the Tulsa Community Foundation (“TCF”) to be secured by tax-exempt bonds purchased from the Tulsa Stadium Trust (the “Stadium Trust”) by TCF. The Stadium Trust is an Oklahoma public trust, of which the City of Tulsa is the sole beneficiary. Stacy C. Kymes, Executive Vice President and Chief Credit Officer of the Company, is Chairman of the Stadium Trust.
	Cavanal Hill Investment Management, Inc., a wholly-owned subsidiary of the Bank, is the administrator to and investment advisor for the Cavanal Hill Funds (the "Funds"), a diversified, open-ended investment company established as a business trust under the Investment Company Act of 1940 (the "1940 Act"). The Bank is custodian and BOSC, Inc. is distributor for the Funds. The Funds’ products are offered to customers, employee benefit plans, trusts and the general public in the ordinary course of business. Approximately 99% of the Funds’ assets of $2.8 billion are held for the Company's clients. A Company executive officer serves on the Funds' board of trustees and officers of the Bank serve as president and secretary of the Funds. A majority of the members of the Funds’ board of trustees are, however, independent of the Company and the Funds are managed by its board of trustees.

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingent Liabilities [Text Block]	'
	(14)  Commitments and Contingent Liabilities
	Litigation Contingencies
	In an opinion dated October 11, 2011, the Oklahoma Supreme Court invalidated, pursuant to a petition brought by certain taxpayers, a $7.1 million settlement agreement between the Bank and the City of Tulsa (“the City”). The agreement settled claims asserted by the Bank against the City and against the Tulsa Airports Improvement Trust ("the Trust") related to a defaulted loan made by the Bank to a start-up airline. The Trust agreed to purchase the loan and its collateral from the Bank in the event of a default by the airline. The settlement amount was fully accrued for in 2011 in the accrual for off-balance sheet credit risk. On July 18, 2012, the Company paid the $7.1 million to the City.
	As a member of Visa, BOK Financial is obligated for a proportionate share of certain covered litigation losses incurred by Visa under a retrospective responsibility plan. A contingent liability was recognized for the Company’s share of Visa’s covered litigation liabilities. Visa funded an escrow account to cover litigation claims, including covered litigation losses under the retrospective responsibility plan, with proceeds from its initial public offering in 2008 and from available cash.
	BOK Financial currently owns 251,837 Visa Class B shares which are convertible into Visa Class A shares after the final settlement of all covered litigation. Class B shares may be diluted in the future if the escrow fund is not adequate to cover future covered litigation costs. Therefore, no value has been currently assigned to the Class B shares and no value may be assigned until the Class B shares are converted into a known number of Class A shares.
	In July 2012, Visa announced it had reached an agreement in principle to resolve pending litigation and provide for settlement payments from the previously funded litigation escrow account. In conjunction with this agreement, Visa deposited an additional $150 million to the litigation escrow account which reduced the exchange rate to approximately 0.4206 Class A shares for each Class B share.
	In the ordinary course of business, BOK Financial and its subsidiaries are subject to legal actions and complaints. Management believes, based upon the opinion of counsel, that the actions and liability or loss, if any, resulting from the final outcomes of the proceedings, will not have a material effect on the Company’s financial condition, results of operations or cash flows.
	Alternative Investment Commitments
	The Company sponsors two private equity funds and invests in several tax credit entities and other funds as permitted by banking regulations. Consolidation of these investments is based on the variable interest model determined by the nature of the entity. Variable interest entities are generally defined as entities that either do not have sufficient equity to finance their activities without support from other parties or whose equity investors lack a controlling financial interest. Variable interest entities are consolidated based on the determination that the Company is the primary beneficiary including the power to direct the activities that most significantly impact the variable interest's economic performance and the obligation to absorb losses of the variable interest or the right to receive benefits of the variable interest that could be significant to the variable interest.
	BOKF Equity, LLC, an indirect wholly-owned subsidiary, is the general partner of two consolidated private equity funds (“the Funds”). The Funds provide alternative investment opportunities to certain customers, some of which are related parties, through unaffiliated limited partnerships. These unaffiliated limited partnerships generally invest in distressed assets, asset buy-outs or venture capital companies. As general partner, BOKF Equity, LLC has the power to direct activities that most significantly affect the Funds' performance and contingent obligations to make additional investments totaling $5.9 million at December 31, 2013. Substantially all of the obligations are offset by limited partner commitments. The Company does not accrue its contingent liability to fund investments. The Volcker Rule in Title VI of the Dodd-Frank Act will limit both the amount and structure of these type of investments.
	Consolidated tax credit entities represent the Company's interest in entities earning federal new market tax credits related to qualifying loans for which the Company has the power to direct the activities that most significantly impact the variable interest's economic performance of the entity including being the primary beneficiary of or the obligation to absorb losses of the variable interest that could be significant to the variable interest. The creditors underlying the other borrowings of consolidated tax credit entities do not have recourse to the general credit of BOKF.
	The Company also has interests in various unrelated alternative investments generally consisting of unconsolidated limited partnership interest in or loans to entities for which investment return is in the form of tax credits or that invest in distressed real estate loans and properties, energy development, venture capital and other activities. The Company is prohibited by banking regulations from controlling or actively managing the activities of these investments and the Company's maximum exposure to loss is restricted to its investment balance. The Company's obligation to fund alternative investments is included in Other liabilities in the Consolidated Balance Sheets. The Company's ability to hold these investments will be curtailed by the Volcker Rule.
	A summary of consolidated and unconsolidated alternative investments as of December 31, 2013 and December 31, 2012 is as follows (in thousands):
		December 31, 2013
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	27,341	$	—	$	—	$	23,036
	Tax credit entities	10,000		13,448		—		10,964		9,869
	Other	—		9,178		—		—		2,019
	Total consolidated	$	10,000	$	49,967	$	—	$	10,964	$	34,924
	Unconsolidated:
	Tax credit entities	$	27,319	$	90,260	$	35,776	$	—	$	—
	Other	—		9,257		1,681		—		—
	Total unconsolidated	$	27,319	$	99,517	$	37,457	$	—	$	—
		December 31, 2012
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	28,169	$	—	$	—	$	23,691
	Tax credit entities	10,000		13,965		—		10,964		10,000
	Other	—		8,952		—		—		2,130
	Total consolidated	$	10,000	$	51,086	$	—	$	10,964	$	35,821
	Unconsolidated:
	Tax credit entities	$	22,354	$	78,109	$	43,052	$	—	$	—
	Other	—		9,113		1,802		—		—
	Total unconsolidated	$	22,354	$	87,222	$	44,854	$	—	$	—
	Other Commitments and Contingencies
	At December 31, 2013, Cavanal Hill Funds’ assets included $884 million of U.S. Treasury, $1.2 billion of cash management and $314 million of tax-free money market funds. Assets of these funds consist of highly-rated, short-term obligations of the U.S. Treasury, corporate issuers and U.S. states and municipalities. The net asset value of units in these funds was $1.00 at December 31, 2013. An investment in these funds is not insured by the Federal Deposit Insurance Corporation or guaranteed by BOK Financial or any of its subsidiaries. BOK Financial may, but is not obligated to purchase assets from these funds to maintain the net asset value at $1.00. No assets were purchased from the funds in 2013 or 2012.
	Cottonwood Valley Ventures, Inc. (“CVV, Inc.”), an indirectly wholly-owned subsidiary of BOK Financial, is being audited by the Oklahoma Tax Commission (“OTC”) for tax years 2007 through 2009. CVV, Inc. is a qualified venture capital company under the applicable Oklahoma statute. As authorized by the statute, CVV, Inc. guarantees transferable Oklahoma state income tax credits by providing direct debt financing to private companies which qualify as statutory business ventures. Due to certain statutory limitations on utilization of such credits, CVV, Inc. must sell the majority of the credits to provide the economic incentives provided for by the statute. During 2012, CVV, Inc. and credit purchasers settled the assessment related to the 2008 tax credits disallowed with no material adverse impact to the consolidated financial statements. Management does not anticipate that the remaining issue under audit will have a material adverse impact to the consolidated financial statements.
	Total rent expense for BOK Financial was $23.5 million in 2013, $21.7 million in 2012 and $20.6 million in 2011. The Bank is obligated under a long-term lease for its bank premises in downtown Tulsa. The lease term, which began November 1, 1976, is for fifty-seven years with an option to terminate in 2024 with a two-year prior written notice. At December 31, 2013, future minimum lease payments for premises under operating leases were as follows: $23.8 million in 2014, $23.9 million in 2015, $21.5 million in 2016, $17.9 million in 2017, $13.8 million in 2018 and $113.0 million thereafter. Premises leases may include options to renew at then current market rates and may include escalation provisions based upon changes in consumer price index or similar benchmarks.
	The Federal Reserve Bank requires member banks to maintain certain minimum average cash balances. Member banks may satisfy reserve balance requirements through it holdings of vault cash and balance maintained directly with a Federal Reserve Bank. The combined average balance of vault cash and balances held at the Federal Reserve Bank were $830 million for the year ended December 31, 2013 and $733 million for the year ended December 31, 2012.
	BOSC, Inc., a wholly-owned subsidiary of BOK Financial, is an introducing broker to Pershing, LLC for retail equity investment transactions. As such, it has indemnified Pershing, LLC against losses due to a customer's failure to settle a transaction or to repay a margin loan. All unsettled transaction and margin loans are secured as required by applicable regulation. The amount of customer balances subject to indemnification totaled $1.4 million at December 31, 2013.
	The Company agreed to guarantee rents totaling $28.7 million through September of 2017 to the City as owner of a building immediately adjacent to the Bank’s main office for space currently rented by third-party tenants in the building. All rent payments are current. Remaining guaranteed rents totaled $11.2 million at December 31, 2013. Current leases expire or are subject to lessee termination options at various dates in 2014. Our obligation under the agreement would be affected by lessee decisions to exercise these options. In return for this guarantee, the Company will receive 80% of net cash flow as defined in an agreement with the City through September 2017 from rental of space that was vacant at the inception of the agreement. The maximum amount that the Company may receive under this agreement is $4.5 million.
	The Company has agreed to purchase approximately $13 million of Oklahoma income tax credits from certain operators of zero emission power facilities in 2014 related to power produced during 2013. Tax credits are generated based on power sold to unrelated third parties and are transferable for a period of ten years following the year of creation. Tax credits will be sold to qualifying taxpayers as BOK Financial is limited by statute on the amount of credits that may be utilized. Oklahoma statutes were amended in May 2013, so that beginning in the year 2014, transferable credits will no longer be generated by zero emission power facilities. Prior to the amended statute, the Company anticipated credits would be purchased through 2022 under long-term contracts with the producers. The agreements contained provisions that they may be terminated in the event of changes in federal law or Oklahoma statutes invalidating the tax credits or their transferability.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	(16)  Earnings Per Share
	The following table presents the computation of basic and diluted earnings per share (dollars in thousands, except per share data):
		Year Ended
		2013		2012		2011
	Numerator:
	Net income attributable to BOK Financial Corp. shareholders	$	316,609	$	351,191	$	285,875
	Less: Earnings allocated to participating securities	3,388		2,541		2,214
	Numerator for basic earnings per share – income available to common shareholders	313,221		348,650		283,661
	Effect of reallocating undistributed earnings of participating securities	7		6		6
	Numerator for diluted earnings per share – income available to common shareholders	$	313,228	$	348,656	$	283,667
	Denominator:
	Weighted average shares outstanding	68,719,069		68,221,013		68,313,898
	Less:  Participating securities included in weighted average shares outstanding	730,172		536,970		526,222
	Denominator for basic earnings per common share	67,988,897		67,684,043		67,787,676
	Dilutive effect of employee stock compensation plans1	216,622		280,897		251,087
	Denominator for diluted earnings per common share	68,205,519		67,964,940		68,038,763
	Basic earnings per share	$	4.61	$	5.15	$	4.18
	Diluted earnings per share	$	4.59	$	5.13	$	4.17
	1  Excludes employee stock options with exercise prices greater than current market price.	—		224,653		769,041

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Shareholders' Equity [Text Block]	'
	(15) Shareholders Equity
	Preferred Stock
	One billion shares of preferred stock with a par value of $0.00005 per share are authorized. The Series A Preferred Stock has no voting rights except as otherwise provided by Oklahoma corporate law and may be converted into one share of Common Stock for each 36 shares of Series A Preferred Stock at the option of the holder. Dividends are cumulative at an annual rate of ten percent of the $0.06 per share liquidation preference value when declared and are payable in cash. Aggregate liquidation preference is $15 million. No Series A Preferred Stock was outstanding in 2013, 2012 or 2011.
	Common Stock
	Common stock consists of 2.5 billion authorized shares with a $0.00006 par value. Holders of common shares are entitled to one vote per share at the election of the Board of Directors and on any question arising at any shareholders’ meeting and to receive dividends when and as declared. Additionally, regulations restrict the ability of national banks and bank holding companies to pay dividends.
	Subsidiary Bank
	The amounts of dividends that BOK Financial’s subsidiary bank can declare and the amounts of loans the subsidiary bank can extend to affiliates are limited by various federal banking regulations and state corporate law. Generally, dividends declared during a calendar year are limited to net profits, as defined, for the year plus retained profits for the preceding two years. The amounts of dividends are further restricted by minimum capital requirements. Based on the most restrictive limitations as well as management’s internal capital policy, at December 31, 2013, BOKF subsidiaries could declare up to $158 million of dividends without regulatory approval. The subsidiary bank declared and paid dividends of $225 million in 2013, $275 million in 2012 and $270 million in 2011.
	As defined by banking regulations, loan commitments and equity investments to a single affiliate may not exceed 10% of unimpaired capital and surplus and loan commitments and equity investments to all affiliates may not exceed 20% of unimpaired capital and surplus. All loans to affiliates must be fully secured by eligible collateral. At December 31, 2013, loan commitments and equity investments were limited to $229 million to a single affiliate and $459 million to all affiliates. The largest loan commitment and equity investment to a single affiliate was $220 million and the aggregate loan commitments and equity investments to all affiliates were $334 million. The largest outstanding amount to a single affiliate at December 31, 2013 was $22 million and the total outstanding amounts to all affiliates were $27 million. At December 31, 2012, total loan commitments and equity investments to all affiliates were $330 million and the total outstanding amounts to all affiliates were $68 million.
	Regulatory Capital
	BOK Financial and the Bank are subject to various capital requirements administered by the federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory and additional discretionary actions by regulators that could have a material effect on BOK Financial's operations. These capital requirements include quantitative measures of assets, liabilities and certain off-balance sheet items. The capital standards are also subject to qualitative judgments by regulators about components, risk weightings and other factors.
	For a banking institution to qualify as well capitalized, Tier I, Total and Leverage capital ratios must be at least 6%, 10% and 5%, respectively. Tier I capital consists primarily of common stockholders' equity, excluding unrealized gains or losses on available for sale securities, less goodwill, core deposit premiums and certain other intangible assets. Total capital consists primarily of Tier I capital plus preferred stock, subordinated debt and allowances for credit losses, subject to certain limitations. The Bank exceeded the regulatory definition of well capitalized as of December 31, 2013 and December 31, 2012.
	A summary of regulatory capital levels follows (dollars in thousands):
			As of December 31,
			2013						2012
	Total Capital (to Risk Weighted Assets):
	Consolidated		$	3,017,022		15.56	%		$	2,877,949			15.13	%
	BOKF, NA		2,293,673			11.88			2,296,451				12.13
	Tier I Capital (to Risk Weighted Assets):
	Consolidated		$	2,668,981		13.77	%		$	2,430,671			12.78	%
	BOKF, NA		1,946,247			10.08			1,849,769				9.77
	Tier I Capital (to Average Assets):
	Consolidated		$	2,668,981		10.05	%		$	2,430,671			9.01	%
	BOKF, NA		1,946,247			7.38			1,849,769				6.89
	Accumulated Other Comprehensive Income (Loss)
	AOCI includes unrealized gains and losses on available for sale ("AFS") securities. Unrealized gain (loss) on AFS securities also includes non-credit related unrealized losses on AFS securities for which an other-than-temporary impairment has been recorded in earnings. AOCI also includes unrealized gains on AFS securities that were transferred from AFS to investment securities in the third quarter of 2011. Such amounts will be amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related accretion of discount on the transferred securities. Unrealized losses on employee benefit plans will be reclassified into income as pension plan costs are recognized over the remaining service period of plan participants. Accumulated losses on the interest rate lock hedge of the 2005 subordinated debt issuance will be reclassified into income over the ten-year life of the debt. Gains and losses in AOCI are net of deferred income taxes.
	A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):
			Unrealized Gain (Loss) on
			Available for Sale Securities			Investment Securities Transferred from AFS				Employee Benefit Plans				Loss on Effective Cash Flow Hedges			Total
	Balance, December 31, 2010		$	122,494		$	—			$	(13,777	)		$	(878	)	$	107,839
	Net change in unrealized gain (loss)		45,593			—				1,694				—			47,287
	Transfer of net unrealized gain from AFS to investment securities		(12,999		)	12,999				—				—			—
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(1,357		)		—				—			(1,357		)
	Interest expense, Subordinated debentures		—			—				—				304			304
	Net impairment losses recognized in earnings		23,507			—				—				—			23,507
	Gain on available for sale securities, net		(34,144		)	—				—				—			(34,144		)
	Other comprehensive income (loss), before income taxes		21,957			11,642				1,694				304			35,597
	Federal and state income tax1		(8,711		)	(4,969		)		(659		)		(118		)	(14,457		)
	Other comprehensive income (loss), net of income taxes		13,246			6,673				1,035				186			21,140
	Balance, December 31, 2011		135,740			6,673				(12,742		)		(692		)	128,979
	Net change in unrealized gain (loss)		58,921			—				7,276				—			66,197
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(6,601		)		—				—			(6,601		)
	Interest expense, Subordinated debentures		—			—				—				453			453
	Net impairment losses recognized in earnings		7,351			—				—				—			7,351
	Gain on available for sale securities, net		(33,845		)	—				—				—			(33,845		)
	Other comprehensive income (loss), before income taxes		32,427			(6,601		)		7,276				453			33,555
	Federal and state income tax1		(12,614		)	3,006				(2,830		)		(176		)	(12,614		)
	Other comprehensive income (loss), net of income taxes		19,813			(3,595		)		4,446				277			20,941
	Balance, December 31, 2012		155,553			3,078				(8,296		)		(415		)	149,920
	Net change in unrealized gain (loss)		(284,104		)	—				8,159				—			(275,945		)
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(3,210		)		—				—			(3,210		)
	Interest expense, Subordinated debentures		—			—				—				262			262
	Net impairment losses recognized in earnings		2,308			—				—				—			2,308
	Gain on available for sale securities, net		(10,720		)	—				—				—			(10,720		)
	Other comprehensive income (loss), before income taxes		(292,516		)	(3,210		)		8,159				262			(287,305		)
	Federal and state income tax1		113,788			1,250				(3,174		)		(102		)	111,762
	Other comprehensive income (loss), net of income taxes		(178,728		)	(1,960		)		4,985				160			(175,543		)
	Balance, December 31, 2013		$	(23,175	)	$	1,118			$	(3,311	)		$	(255	)	$	(25,623	)
	1	Calculated using 39% effective tax rate.

Reportable_Segments

Reportable Segments	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Reportable Segments [Text Block]	'
	(17)  Reportable Segments
	BOK Financial operates three principal lines of business: Commercial Banking, Consumer Banking and Wealth Management. Commercial Banking includes lending, treasury and cash management services and customer risk management products to small businesses, middle market and larger commercial customers. Commercial Banking also includes the TransFund EFT network. Consumer Banking includes retail lending and deposit services and all mortgage banking activities. Wealth Management provides fiduciary services, brokerage and trading, private bank services and investment advisory services in all markets. Wealth Management also originates loans for high net worth clients.
	In addition to its lines of business, BOK Financial has a Funds Management unit. The primary purpose of this unit is to manage the overall liquidity needs and interest rate risk. Each line of business borrows funds from and provides funds to the Funds Management unit as needed to support their operations. Operating results for Funds Management and other include the effect of interest rate risk positions and risk management activities, securities gains and losses including impairment charges, the provision for credit losses in excess of net loans charged off, tax planning strategies and certain executive compensation costs that are not attributed to the lines of business.
	BOK Financial allocates resources and evaluates performance of its lines of business after allocation of funds, certain indirect expenses, taxes based on statutory rates, actual net credit losses and capital costs. The cost of funds borrowed from the Funds Management unit by the operating lines of business is transfer priced at rates that approximate market rates for funds with similar duration. Market rates are generally based on the applicable LIBOR or interest rate swap rates, adjusted for prepayment risk. This method of transfer-pricing funds that support assets of the operating lines of business tends to insulate them from interest rate risk.
	The value of funds provided by the operating lines of business to the Funds Management unit is based on rates which approximate the wholesale market rates for funds with similar duration and re-pricing characteristics. Market rates are generally based on LIBOR or interest rate swap rates. The funds credit formula applied to deposit products with indeterminate maturities is established based on their re-pricing characteristics reflected in a combination of the short-term LIBOR rates and a moving average of an intermediate term swap rate, with an appropriate spread applied to both. Shorter duration products are weighted towards the short-term LIBOR rate and longer duration products are weighted towards intermediate swap rates. The expected duration ranges from 30 days for certain rate-sensitive deposits to five years.
	Economic capital is assigned to the business units by a capital allocation model that reflects management's assessment of risk. This model assigns capital based upon credit, operating, interest rate and market risk inherent in our business lines and recognizes the diversification benefits among the units. The level of assigned economic capital is a combination of the risk taken by each business line, based on its actual exposures and calibrated to its own loss history where possible. Average invested capital includes economic capital and amounts we have invested in the lines of business.
	Substantially all revenue is from domestic customers. No single external customer accounts for more than 10% of total revenue.
	Net loans charged off and provision for credit losses represents net loans charged off as attributed to the lines of business and the provision for credit losses in excess of net charge-offs attributed to Funds Management and Other.
	Reportable segments reconciliation to the Consolidated Financial Statements for the year ended December 31, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	364,604		$	99,509		$	25,478		$	184,886		$	674,477
	Net interest revenue (expense) from internal sources	(37,025		)	20,290			20,061			(3,326		)	—
	Net interest revenue	327,579			119,799			45,539			181,560			674,477
	Provision for credit losses	(3,468		)	4,628			1,275			(30,335		)	(27,900		)
	Net interest revenue after provision for credit losses	331,047			115,171			44,264			211,895			702,377
	Other operating revenue	171,900			216,828			213,790			11,954			614,472
	Other operating expense	244,211			226,852			237,540			132,017			840,620
	Income before taxes	258,736			105,147			20,514			91,832			476,229
	Federal and state income tax	100,648			40,902			7,980			7,768			157,298
	Net income	158,088			64,245			12,534			84,064			318,931
	Net income attributable to non-controlling interest	—			—			—			2,322			2,322
	Net income attributable to BOK Financial Corp.	$	158,088		$	64,245		$	12,534		$	81,742		$	316,609
	Average assets	$	10,483,706		$	5,669,580		$	4,556,132		$	6,671,676		$	27,381,094
	Average invested capital	906,716			293,736			203,914			1,606,716			3,011,082
	Performance measurements:
	Return on average assets	1.51		%	1.13		%	0.28		%				1.16		%
	Return on average invested capital	17.44		%	21.87		%	6.15		%				10.51		%
	Efficiency ratio	49.18		%	66.62		%	91.92		%				65.03		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the year ended December 31, 2012 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	367,533		$	101,029		$	27,647		$	211,340		$	707,549
	Net interest revenue (expense) from internal sources	(43,438		)	21,305			21,456			677			—
	Net interest revenue	324,095			122,334			49,103			212,017			707,549
	Provision for credit losses	10,852			9,198			2,284			(44,334		)	(22,000		)
	Net interest revenue after provision for credit losses	313,243			113,136			46,819			256,351			729,549
	Other operating revenue	171,131			262,908			200,007			19,632			653,678
	Other operating expense	246,954			248,767			214,293			130,349			840,363
	Income before taxes	237,420			127,277			32,533			145,634			542,864
	Federal and state income tax	92,356			49,511			12,655			34,218			188,740
	Net income	145,064			77,766			19,878			111,416			354,124
	Net income attributable to non-controlling interest	—			—			—			2,933			2,933
	Net income attributable to BOK Financial Corp.	$	145,064		$	77,766		$	19,878		$	108,483		$	351,191
	Average assets	$	10,147,805		$	5,726,564		$	4,357,641		$	6,057,140		$	26,289,150
	Average invested capital	882,037			289,665			184,707			1,549,546			2,905,955
	Performance measurements:
	Return on average assets	1.43		%	1.36		%	0.46		%				1.34		%
	Return on average invested capital	16.45		%	26.85		%	10.76		%				12.09		%
	Efficiency ratio	51.36		%	63.97		%	86.23		%				62.87		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the year ended December 31, 2011 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	342,853		$	102,854		$	30,859		$	216,479		$	693,045
	Net interest revenue (expense) from internal sources	(30,689		)	27,416			16,540			(13,267		)	—
	Net interest revenue	312,164			130,270			47,399			203,212			693,045
	Provision for credit losses	20,760			13,598			2,960			(43,368		)	(6,050		)
	Net interest revenue after provision for credit losses	291,404			116,672			44,439			246,580			699,095
	Other operating revenue	147,545			182,875			171,827			26,291			528,538
	Other operating expense	230,458			239,302			190,702			118,836			779,298
Income before taxes	208,491			60,245			25,564			154,035			448,335
Federal and state income tax	81,103			23,435			9,944			44,029			158,511
Net income	127,388			36,810			15,620			110,006			289,824
Net income attributable to non-controlling interest	—			—			—			3,949			3,949
Net income attributable to BOK Financial Corp.	$	127,388		$	36,810		$	15,620		$	106,057		$	285,875
Average assets	$	9,383,530		$	5,937,584		$	4,073,623		$	5,100,124		$	24,494,861
Average invested capital	884,171			273,905			174,877			1,348,912			2,681,865
Performance measurements:
Return on average assets	1.36		%	0.62		%	0.38		%				1.17		%
Return on average invested capital	14.41		%	13.44		%	8.93		%				10.66		%
Efficiency ratio	50.22		%	73.06		%	87.21		%				63.83		%

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	(18) Fair Value Measurements
	Fair value is defined by applicable accounting guidance as the price to sell an asset or transfer a liability in an orderly transaction between market participants in the principal market for the given asset or liability at the measurement date based on market conditions at that date. Certain assets and liabilities are recorded in the Company’s financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis.
	For some assets and liabilities, observable market transactions and market information might be available. For other assets and liabilities, observable market transactions and market information might not be available. A hierarchy for fair value has been established which categorizes into three levels the inputs to valuation techniques used to measure fair value. The three levels are as follows:
	Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) - fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities.
	Significant Other Observable Inputs (Level 2) - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to us by an applicable third-party pricing service and is based on one or more of the following:
	•	Quoted prices for similar, but not identical, assets or liabilities in active markets;
	•	Quoted prices for identical or similar assets or liabilities in inactive markets;
	•	Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates;
	•	Other inputs derived from or corroborated by observable market inputs.
	Significant Unobservable Inputs (Level 3) - Fair value is based upon model-based valuation techniques for which at least one significant assumption is not observable in the market.
	Transfers between levels are recognized as of the end of the reporting period. As of December 31, 2012, $2.2 million of common stock of a privately held financial institution was transferred from Significant Other Observable Inputs (Level 2) to Significant Unobservable Inputs (Level 3). There were no other transfers in or out of quoted prices in active markets for identical instruments, significant other observable inputs or significant unobservable inputs during the year ended December 31, 2013 and 2012, respectively.
	The underlying methods used by the third-party pricing services are considered in determining the primary inputs used to determine fair values. Management has evaluated the methodologies employed by the third-party pricing services by comparing the price provided by the pricing service with other sources, including brokers' quotes, sales or purchases of similar instruments and discounted cash flows to establish a basis for reliance on the pricing service values. Significant differences between the pricing service provided value and other sources are discussed with the pricing service to understand the basis for their values. Based on all observable inputs, management may adjust prices obtained from third-party pricing services to more appropriately reflect the prices that would be received to sell assets or paid to transfer liabilities in orderly transactions in the current market. No significant adjustments were made to price provided by third-party pricing services at December 31, 2013 and 2012.
	Assets and Liabilities Measured at Fair Value on a Recurring Basis
	The fair value of financial assets and liabilities that are measured on a recurring basis are as follows as of December 31, 2013 (in thousands):
			Total				Quoted Prices in Active Markets for Identical Instruments				Significant Other Observable Inputs			Significant Unobservable Inputs
	Assets:
	Trading securities:
	U.S. Government agency debentures		$	34,120			$	—			$	34,120		$	—
	U.S. agency residential mortgage-backed securities		21,011				—				21,011			—
	Municipal and other tax-exempt securities		27,350				—				27,350			—
	Other trading securities		9,135				—				9,135			—
	Total trading securities		91,616				—				91,616			—
	Available for sale securities:
	U.S. Treasury		1,042				1,042				—			—
	Municipal and other tax-exempt		73,775				—				55,970			17,805
	U.S. agency residential mortgage-backed securities		7,716,010				—				7,716,010			—
	Privately issued residential mortgage-backed securities		221,099				—				221,099			—
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,055,804				—				2,055,804			—
	Other debt securities		35,241				—				30,529			4,712
	Perpetual preferred stock		22,863				—				22,863			—
	Equity securities and mutual funds		21,328				—				17,121			4,207
	Total available for sale securities		10,147,162				1,042				10,119,396			26,724
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		157,431				—				157,431			—
	Other securities		9,694				—				9,694			—
	Total fair value option securities		167,125				—				167,125			—
	Residential mortgage loans held for sale		200,546				—				200,546			—
	Mortgage servicing rights, net1		153,333				—				—			153,333
	Derivative contracts, net of cash margin2		265,012				2,712				262,300			—
	Other assets – private equity funds		27,341				—				—			27,341
	Liabilities:
	Derivative contracts, net of cash margin2		247,185				—				247,185			—
	1	A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 7, Mortgage Banking Activities.
	2	See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets or identical instruments (Level 1) are exchange-traded energy derivative contracts, net of cash margin.
	The fair value of financial assets and liabilities that are measured on a recurring basis are as follows as of December 31, 2012 (in thousands):
			Total				Quoted Prices in Active Markets for Identical Instruments				Significant Other Observable Inputs			Significant Unobservable Inputs
	Assets:
	Trading securities:
	U.S. Government agency debentures		$	16,545			$	—			$	16,545		$	—
	U.S. agency residential mortgage-backed securities		86,361				—				86,361			—
	Municipal and other tax-exempt securities		90,326				—				90,326			—
	Other trading securities		20,870				—				20,870			—
	Total trading securities		214,102				—				214,102			—
	Available for sale securities:
	U.S. Treasury		1,002				1,002				—			—
	Municipal and other tax-exempt		87,142				—				46,440			40,702
	U.S. agency residential mortgage-backed securities		9,889,821				—				9,889,821			—
	Privately issued residential mortgage-backed securities		325,163				—				325,163			—
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		895,075				—				895,075			—
	Other debt securities		36,389				—				30,990			5,399
	Perpetual preferred stock		25,072				—				25,072			—
	Equity securities and mutual funds		27,557				4,165				21,231			2,161
	Total available for sale securities		11,287,221				5,167				11,233,792			48,262
Fair value option securities:
U.S. agency residential mortgage-backed securities		257,040				—				257,040			—
Corporate debt securities		26,486				—				26,486			—
Other securities		770				—				770			—
Total fair value option securities		284,296				—				284,296			—
Residential mortgage loans held for sale		293,762				—				293,762			—
Mortgage servicing rights, net1		100,812				—				—			100,812
Derivative contracts, net of cash margin2		338,106				11,597				326,509			—
Other assets – private equity funds		28,169				—				—			28,169
Liabilities:
Derivative contracts, net of cash margin 2		283,589				—				283,589			—
1	A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 7, Mortgage Banking Activities.
2	See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets for identical instruments (Level 1) are exchange-traded energy and agricultural derivative contracts, net of cash margin.
Following is a description of the Company's valuation methodologies used for assets and liabilities measured on a recurring basis:
Securities
The fair values of trading, available for sale and fair value options securities are based on quoted prices for identical instruments in active markets, when available. If quoted prices for identical instruments are not available, fair values are based on significant other observable inputs such as quoted prices of comparable instruments or interest rates and credit spreads, yield curves, volatilities, prepayment speeds and loss severities.
The fair value of certain available for sale municipal and other debt securities may be based on significant unobservable inputs. These significant unobservable inputs include limited observed trades, projected cash flows, current credit rating of the issuers and, when applicable, the insurers of the debt and observed trades of similar debt. Discount rates are primarily based on reference to interest rate spreads on comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies adjusted for a lack of trading volume. Significant unobservable inputs are developed by investment securities professionals involved in the active trading of similar securities. A summary of significant inputs used to value these securities follows. A management committee composed of senior members from the Company's Capital Markets, Risk Management and Finance departments assess the appropriateness of these inputs monthly.
Derivatives
All derivative instruments are carried on the balance sheet at fair value. Fair values for exchange-traded contracts are based on quoted prices. Fair values for over-the-counter interest rate, commodity and foreign exchange contracts are based on valuations provided either by third-party dealers in the contracts, quotes provided by independent pricing services, or a third-party provided pricing model that use significant other observable market inputs.
Credit risk is considered in determining the fair value of derivative instruments. Management determines fair value adjustments based on various risk factors including but not limited to counterparty credit rating or equivalent loan grading, derivative contract notional size, price volatility of the underlying commodity, duration of the derivative contracts and expected loss severity. Expected loss severity is based on historical losses for similarly risk graded commercial loan customers. Decreases in counterparty credit rating or grading and increases in price volatility and expected loss severity all tend to increase the credit quality adjustment which reduces the fair value of asset contracts. The reduction in fair value is recognized in earnings during the current period.
We also consider our own credit risk in determining the fair value of derivative contracts. Changes in our credit rating would affect the fair value of our derivative liabilities. In the event of a credit downgrade, the fair value of our derivative liabilities would increase. The change in the fair value would be recognized in earnings in the current period.
Residential Mortgage Loans Held for Sale
Residential mortgage loans held for sale are carried on the balance sheet at fair value. The fair values of residential mortgage loans held for sale are based upon quoted market prices of such loans sold in securitization transactions, including related unfunded loan commitments.
Other Assets - Private Equity Funds
The fair value of the portfolio investments of the Company's two private equity funds are based upon net asset value reported by the underlying funds, as adjusted by the general partner when necessary to represent the price that would be received to sell the assets. The Company's private equity funds provide customers alternative investment opportunities as limited partners of the funds. As fund of funds, the private equity funds invest in other limited partnerships or limited liability companies that invest substantially all of their assets in U.S. companies pursuing diversified investment strategies including early-stage venture capital, distressed securities and corporate or asset buy-outs. Private equity fund assets are long-term, illiquid investments. No secondary market exists for these assets. The private equity funds typically invest in funds that provide no redemption rights to investors. The fair value of the private equity investments may only be realized through cash distributions from the underlying funds.
The following represents the changes related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
		Available for Sale Securities											Other assets – private equity funds
		Municipal and other tax-exempt				Other debt securities				Equity securities and mutual funds
Balance, December 31, 2011		$	42,353			$	5,900			$	—		$	30,902
Transfer to Level 3 from Level 2		—				—				2,161			—
Purchases and capital calls		—				—				—			3,446
Redemptions and distributions		(988		)		(500		)		—			(9,819		)
Gain (loss) recognized in earnings:
Gain (loss) on other assets, net		—				—				—			3,640
Gain on available for sale securities, net		1				—				—			—
Other-than-temporary impairment losses		(642		)		—				—			—
Other comprehensive loss		(22		)		(1		)		—			—
Balance, December 31, 2012		40,702				5,399				2,161			28,169
Transfer to Level 3 from Level 2		—				—				—			—
Purchases and capital calls		—				—				—			1,415
Redemptions and distributions		(19,238		)		(500		)		—			(5,294		)
Gain (loss) recognized in earnings:
Gain on other assets, net		—				—				—			3,051
Gain on available for sale securities, net		1,216				—				—			—
Other-than-temporary impairment losses		(1,369		)		—				—			—
Other comprehensive income (loss)		(3,506		)		(187		)		2,046			—
Balance, December 31, 2013		$	17,805			$	4,712			$	4,207		$	27,341
A summary of quantitative information about assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) as of December 31, 2013 follows (in thousands):
Quantitative Information about Level 3 Recurring Fair Value Measurements
		Par				Amortized				Fair			Valuation Technique(s)		Unobservable Input		Range
		Value				Cost				Value							(Weighted Average)
Available for sale securities
Municipal and other tax-exempt securities – Investment grade		$	18,695			$	18,624			$	17,805		Discounted cash flows	1	Interest rate spread		4.97%-5.27% (5.16%)	2
																	95.02%-95.50% (95.24%)	3
Other debt securities		4,900				4,900				4,712			Discounted cash flows	1	Interest rate spread		5.67% (5.67%)	4
																	96.16% (96.16%)	3
Equity securities and other mutual funds		N/A				2,420				4,207			Publicly announced preliminary purchase price information from acquirer.		Discount for settlement uncertainty.		N/A	5
Other assets - private equity funds		N/A				N/A				27,341			Net asset value reported by underlying fund		Net asset value reported by underlying fund		N/A
1	Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume
2	Interest rate yields used to value investment grade tax-exempt securities represent a spread of 467 to 518 basis points over average yields for comparable tax-exempt securities.
3	Represents fair value as a percentage of par value.
4	Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 1%.
5	Fair value of shares of a smaller privately-held financial institution were valued using preliminary announced purchase information by a publicly-traded acquirer.
The fair value of these securities measured at fair value using significant unobservable inputs are sensitive primarily to changes in interest rate spreads. At December 31, 2013, for tax-exempt securities rated investment grade by all nationally-recognized rating agencies, a 100 basis point increase in the spreads over average yields for comparable securities would result in an additional decrease in the fair value of $172 thousand. For taxable securities rated investment grade by all nationally-recognized rating agencies, a 100 basis point increase in the spreads over average yield for comparable securities would result in an additional decrease in the fair value of $36 thousand.
A summary of quantitative information about Recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2012 follows (in thousands):
Quantitative Information about Level 3 Recurring Fair Value Measurements
		Par				Amortized				Fair			Valuation Technique(s)		Unobservable Input		Range
		Value				Cost6				Value							(Weighted Average)
Available for sale securities
Municipal and other tax-exempt securities
Investment grade		$	28,570			$	28,473			$	28,318		Discounted cash flows	1	Interest rate spread		1.00%-1.50% (1.25%)	2
																	98.83%-99.43% (99.12%)	3
Below investment grade		17,000				12,384				12,384			Discounted cash flows	1	Interest rate spread		7.21%-9.83% (7.82%)	4
																	72.79%-73.00% (72.85%)	3
Total municipal and other tax-exempt securities		45,570				40,857				40,702
Other debt securities		5,400				5,400				5,399			Discounted cash flows	1	Interest rate spread		1.65%-1.71% (1.70%)	5
																	100% (100%)	3
Equity securities and other mutual funds		N/A				2,420				2,161			Tangible book value per share of publicly traded financial institutions of similar size, less liquidity discount.		Peer group tangible book per share and liquidity discount		N/A	7
Other assets - private equity funds		N/A				N/A				28,169			Net asset value reported by underlying fund		Net asset value reported by underlying fund		N/A
1	Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume
2	Interest rate yields used to value investment grade tax-exempt securities represent a spread of 75 to 80 basis points over average yields for comparable tax-exempt securities.
3	Represents fair value as a percentage of par value
4	Interest rate yields determined using a spread of 700 basis points over comparable municipal securities of varying durations.
5	Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 1%.
6	Amortized cost reduced by other-than-temporary impairments recorded in earnings. See Note 2 for additional discussion.
7	Fair value of shares of a smaller privately-held financial institution were valued using the tangible book value per share of similarly sized financial institutions within the immediate geographical market with a discount of 20% due to the liquidity of the shares.
Fair Value of Assets and Liabilities Measured on a Non-Recurring Basis
Assets measured at fair value on a non-recurring basis include pension plan assets, which are based on quoted prices in active markets for identical instruments, collateral for certain impaired loans and real property and other assets acquired to satisfy loans, which are based primarily on comparisons to completed sales of similar assets. In addition, goodwill impairment is evaluated based on the fair value of the Company's reporting units.
The following represents the carrying value of assets measured at fair value on a non-recurring basis and related losses recorded during the year. The carrying value represents only those assets with the balance sheet date for which the fair value was adjusted during the year:
	Carrying Value at December 31, 2013											Fair Value Adjustments for the
												Year Ended December 31, 2013
												Recognized in:
	Quoted Prices				Significant				Significant			Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net
	in Active Markets for Identical Instruments				Other				Unobservable
					Observable				Inputs
					Inputs
Impaired loans	$	—			$	8,380			$	4,622		$	6,598			$	—
Real estate and other repossessed assets	—				20,733				191			—				5,489
	Carrying Value at December 31, 2012											Fair Value Adjustments for the Three Months Ended
												31-Dec-12
												Recognized in:
	Quoted Prices				Significant				Significant			Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net
	in Active Markets for Identical Instruments				Other				Unobservable
					Observable				Inputs
					Inputs
Impaired loans	$	—			$	21,589			$	3,891		$	11,615			$	—
Real estate and other repossessed assets	—				39,077				4,421			—				15,954
The fair value of collateral-dependent impaired loans and real estate and other repossessed assets and the related fair value adjustments are generally based on unadjusted third-party appraisals. Our appraisal review policies require appraised values to be supported by observed inputs derived principally from or corroborated by observable market data. Appraisals that are not based on observable inputs or that require significant adjustments or fair value measurements that are not based on third-party appraisals are considered to be based on significant unobservable inputs. Non-recurring fair value measurements of collateral-dependent impaired loans and real estate and other repossessed assets based on significant unobservable inputs are generally due to estimate of current fair values between appraisal dates. Significant unobservable inputs include listing prices for comparable assets, uncorroborated expert opinions or management's knowledge of the collateral or industry. These inputs are developed by asset management and workout professional and approved by senior Credit Administration executives.
A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2013 follows (in thousands):
Quantitative Information about Level 3 Non-recurring Fair Value Measurements
		Fair Value				Valuation Technique(s)		Unobservable Input		Range
										(Weighted Average)
Impaired loans		$	4,622			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
Real estate and other repossessed assets		191				Listing value, less cost to sell		Marketability adjustments off appraised value		80%-85% (82%)1
1	Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value.
A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2012 follows (in thousands):
Quantitative Information about Level 3 Non-recurring Fair Value Measurements
		Fair Value				Valuation Technique(s)		Unobservable Input		Range
										(Weighted Average)
Impaired loans		$	3,891			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
Real estate and other repossessed assets		4,421				Listing value, less cost to sell		Marketability adjustments off appraised value		58%-85%(76%)1
1	Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value. In addition, $345 thousand of real estate and other repossessed assets at December 31, 2012 are based on uncorroborated expert opinions or management's knowledge of the collateral or industry and do not have an independently appraised value.
The fair value of pension plan assets was approximately $49 million at December 31, 2013 and $46 million at December 31, 2012, determined by significant other observable inputs. Fair value adjustments of pension plan assets along with changes in projected benefit obligation are recognized in other comprehensive income.
Goodwill and intangible assets, which consist primarily of core deposit intangible assets and other acquired intangibles, for each business unit are evaluated for impairment annually as of October 1st or more frequently if conditions indicate that impairment may have occurred. The evaluation of possible impairment of intangible assets involves significant judgment based upon short-term and long-term projections of future performance.
The fair value of each of our reporting units is estimated by the discounted future earnings method. Income growth is projected for each of our reporting units over five years and a terminal value is computed. The projected income stream is converted to fair value by using a discount rate that reflects a rate of return required by a willing buyer. Assumptions used to value our business units are based on growth rates, volatility, discount rate and market risk premium inherent in our current stock price.
Fair Value of Financial Instruments
The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or non-recurring (dollars in thousands):
		31-Dec-13
		Carrying				Range of Contractual Yields				Average		Discount Rate				Estimated
		Value								Re-pricing						Fair
										(in years)						Value
Cash and due from banks		$	512,931													$	512,931
Interest-bearing cash and cash equivalents		574,282														574,282
Trading securities:
U.S. Government agency obligations		34,120														34,120
U.S. agency residential mortgage-backed securities		21,011														21,011
Municipal and other tax-exempt securities		27,350														27,350
Other trading securities		9,135														9,135
Total trading securities		91,616														91,616
Investment securities:
Municipal and other tax-exempt		440,187														439,870
U.S. agency residential mortgage-backed securities		50,182														51,864
Other debt securities		187,509														195,393
Total investment securities		677,878														687,127
Available for sale securities:
U.S. Treasury		1,042														1,042
Municipal and other tax-exempt		73,775														73,775
U.S. agency residential mortgage-backed securities		7,716,010														7,716,010
Privately issued residential mortgage-backed securities		221,099														221,099
Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,055,804														2,055,804
Other debt securities		35,241														35,241
Perpetual preferred stock		22,863														22,863
Equity securities and mutual funds		21,328														21,328
Total available for sale securities		10,147,162														10,147,162
Fair value option securities:
U.S. agency residential mortgage-backed securities		157,431														157,431
Corporate debt securities		—														—
Other securities		9,694														9,694
Total fair value option securities		167,125														167,125
Residential mortgage loans held for sale		334,250														200,546
Loans:
Commercial		7,943,221				0.04	% -	30.00%		0.49		0.48	% -	4.33%		7,835,325
Commercial real estate		2,415,353				0.38	% -	18.00%		0.78		1.21	% -	3.49%		2,394,443
Residential mortgage		2,052,026				0.38	% -	18.00%		2.63		0.59	% -	4.73%		2,068,690
Consumer		381,664				0.38	% -	21.00%		0.55		1.22	% -	3.75%		375,962
Total loans		12,792,264														12,674,420
Allowance for loan losses		(185,396		)												—
Net loans		12,606,868														12,674,420
Mortgage servicing rights		153,333														153,333
Derivative instruments with positive fair value, net of cash margin		265,012														265,012
Other assets – private equity funds		27,341														27,341
Deposits with no stated maturity		17,573,334														17,573,334
Time deposits		2,695,993				0.01	% -	9.64%		2.12		0.75	% -	1.33%		2,697,290
Other borrowings		2,721,888				0.25	% -	4.78%		0.03		0.08	% -	2.64%		2,693,788
Subordinated debentures		347,802				0.95	% -	5.00%		2.63		2.22%				344,783
Derivative instruments with negative fair value, net of cash margin		247,185														247,185
		31-Dec-12
		Carrying				Range of Contractual Yields				Average		Discount Rate				Estimated
		Value								Re-pricing						Fair
										(in years)						Value
Cash and due from banks		$	710,739													$	710,739
Interest-bearing cash and cash equivalents		575,500														575,500
Trading securities:
Obligations of the U.S. government		16,545														16,545
U.S. agency residential mortgage-backed securities		86,361														86,361
Municipal and other tax-exempt securities		90,326														90,326
Other trading securities		20,870														20,870
Total trading securities		214,102														214,102
Investment securities:
Municipal and other tax-exempt		232,700														235,940
U.S. agency residential mortgage-backed securities		82,767														85,943
Other debt securities		184,067														206,575
Total investment securities		499,534														528,458
Available for sale securities:
U.S. Treasury		1,002														1,002
Municipal and other tax-exempt		87,142														87,142
U.S. agency residential mortgage-backed securities		9,889,821														9,889,821
Privately issued residential mortgage-backed securities		325,163														325,163
Commercial mortgage-backed securities guaranteed by U.S. government agencies		895,075														895,075
Other debt securities		36,389														36,389
Perpetual preferred stock		25,072														25,072
Equity securities and mutual funds		27,557														27,557
Total available for sale securities		11,287,221														11,287,221
Fair value option securities:
U.S. agency residential mortgage-backed securities		257,040														257,040
Corporate debt securities		26,486														26,486
Other securities		770														770
Total fair value option securities		284,296														284,296
Residential mortgage loans held for sale		293,762														293,762
Loans:
Commercial		7,641,912				0.21	% -	30.00%		0.69		0.51	% -	3.59%		7,606,505
Commercial real estate		2,228,999				0.21	% -	18.00%		0.92		1.26	% -	3.18%		2,208,217
Residential mortgage		2,045,040				0.38	% -	18.00%		3.34		0.86	% -	3.09%		2,110,773
Consumer		395,505				0.38	% -	21.00%		0.32		1.37	% -	3.60%		388,748
Total loans		12,311,456														12,314,243
Allowance for loan losses		(215,507		)												—
Net loans		12,095,949														12,314,243
Mortgage servicing rights		100,812														100,812
Derivative instruments with positive fair value, net of cash margin		338,106														338,106
Other assets – private equity funds		28,169														28,169
Deposits with no stated maturity		18,211,068														18,211,068
Time deposits		2,967,992				0.01	% -	9.64%		2.15		0.8	% -	1.15%		3,441,610
Other borrowings		2,706,221				0.09	% -	5.25%		—		0.09	% -	2.67%		2,369,224
Subordinated debentures		347,633				1	% -	5.00%		3.56		2.40%				411,243
Derivative instruments with negative fair value, net of cash margin		283,589														283,589
Because no market exists for certain of these financial instruments and management does not intend to sell these financial instruments, the fair values shown in the tables above may not represent values at which the respective financial instruments could be sold individually or in the aggregate at the given reporting date.
The following methods and assumptions were used in estimating the fair value of these financial instruments:
Cash and Cash Equivalents
The book value reported in the consolidated balance sheet for cash and short-term instruments approximates those assets’ fair values.
Securities
The fair values of securities are generally based on Significant Other Observable Inputs such as quoted prices for comparable instruments or interest rates and credit spreads, yield curves, volatilities prepayment speeds and loss severities.
Loans
The fair value of loans, excluding loans held for sale, are based on discounted cash flow analyses using interest rates and credit and liquidity spreads currently being offered for loans with similar remaining terms to maturity and risk, adjusted for the impact of interest rate floors and ceilings which are classified as Significant Unobservable Inputs. The fair values of loans were estimated to approximate their discounted cash flows less loan loss allowances allocated to these loans of $157 million at December 31, 2013 and $171 million at December 31, 2012.
Deposits
The fair values of time deposits are based on discounted cash flow analyses using interest rates currently being offered on similar transactions which are considered Significant Unobservable Inputs. Estimated fair value of deposits with no stated maturity, which includes demand deposits, transaction deposits, money market deposits and savings accounts, is equal to the amount payable on demand. Although market premiums paid reflect an additional value for these low cost deposits, adjusting fair value for the expected benefit of these deposits is prohibited. Accordingly, the positive effect of such deposits is not included in the tables above.
Other Borrowings and Subordinated Debentures
The fair values of these instruments are based upon discounted cash flow analyses using interest rates currently being offered on similar instruments which are considered Significant Unobservable Inputs
Off-Balance Sheet Instruments
The fair values of commercial loan commitments are based on fees currently charged to enter into similar agreements, taking into account the remaining terms of the agreements. The fair values of these off-balance sheet instruments were not significant at December 31, 2013 or December 31, 2012.
Fair Value Election
As more fully disclosed in Note 2 and Note 7 to the Consolidated Financial Statements, the Company has elected to carry all residential mortgage-backed securities which have been designated as economic hedges against changes in the fair value of mortgage servicing rights, certain corporate debt securities economically hedged by derivative contracts to manage interest rate risk and all residential mortgage loans originated for sale at fair value. Changes in the fair value of these financial instruments are recognized in earnings.

Parent_Company_Only_Financial_

Parent Company Only Financial Statements	12 Months Ended
	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Parent Company Only Financial Statements [Text Block]	'
	(19) Parent Company Only Financial Statements
	Summarized financial information for BOK Financial – Parent Company Only follows:
	Balance Sheets
	(In thousands)	December 31,
		2013			2012
	Assets
	Cash and cash equivalents	$	561,297		$	457,514
	Available for sale securities	27,526			44,881
	Investment in subsidiaries	2,426,495			2,464,729
	Other assets	12,872			4,324
	Total assets	$	3,028,190		$	2,971,448
	Liabilities and Shareholders’ Equity
	Other liabilities	$	8,141		$	13,588
	Total liabilities	8,141			13,588
	Shareholders’ equity:
	Common stock	4			4
	Capital surplus	898,586			859,278
	Retained earnings	2,349,428			2,137,541
	Treasury stock	(202,346		)	(188,883		)
	Accumulated other comprehensive income (loss)	(25,623		)	149,920
	Total shareholders’ equity	3,020,049			2,957,860
	Total liabilities and shareholders’ equity	$	3,028,190		$	2,971,448
	Statements of Earnings
	(In thousands)	Year Ended December 31,
		2013			2012			2011
	Dividends, interest and fees received from subsidiaries	$	225,340		$	275,330		$	270,474
	Other revenue	3,341			2,295			2,128
	Other-than-temporary impairment losses recognized in earnings	—			(1,099		)	(2,098		)
	Total revenue	228,681			276,526			270,504
	Interest expense	292			269			354
	Professional fees and services	811			765			538
	Other operating expense	3,272			3,099			7,688
	Total expense	4,375			4,133			8,580
	Income before taxes and equity in undistributed income of subsidiaries	224,306			272,393			261,924
	Federal and state income tax (benefit)	(1,578		)	(1,706		)	(3,169		)
	Income before equity in undistributed income of subsidiaries	225,884			274,099			265,093
	Equity in undistributed income of subsidiaries	90,725			77,092			20,782
	Net income attributable to BOK Financial Corp. shareholders	$	316,609		$	351,191		$	285,875
	Statements of Cash Flows
	(In thousands)	Year Ended December 31,
		2013			2012			2011
	Cash flows from operating activities:
	Net income	$	316,609		$	351,191		$	285,875
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed income of subsidiaries	(90,725		)	(77,092		)	(20,782		)
	Tax benefit on exercise of stock options	(2,210		)	(120		)	(659		)
	Change in other assets	(8,308		)	4,237			15,249
	Change in other liabilities	4,263			(4,965		)	(18,225		)
	Net cash provided by operating activities	219,629			273,251			261,458
	Cash flows from investing activities:
	Purchases of available for sale securities	—			(5,343		)	(3,797		)
	Sales of available for sale securities	13,600			4,781			16,500
	Investment in subsidiaries	(36,000		)	(9,100		)	(7,250		)
	Acquisitions, net of cash acquired	(7,500		)	(20,000		)	—
	Net cash provided by (used in) investing activities	(29,900		)	(29,662		)	5,453
	Cash flows from financing activities:
	Issuance of common and treasury stock, net	16,566			14,650			14,541
	Tax benefit on exercise of stock options	2,210			120			659
	Dividends paid	(104,722		)	(166,982		)	(76,423		)
	Repurchase of common stock	—			(20,558		)	(26,446		)
	Net cash used in financing activities	(85,946		)	(172,770		)	(87,669		)
	Net increase in cash and cash equivalents	103,783			70,819			179,242
	Cash and cash equivalents at beginning of period	457,514			386,695			207,453
Cash and cash equivalents at end of period	$	561,297		$	457,514		$	386,695
Cash paid for interest	$	292		$	269		$	354

Subsequent_Events

Subsequent Events	12 Months Ended
	Dec. 31, 2013
Subsequent Events [Abstract]	'
Subsequent Events [Text Block]	'
	(20) Subsequent Events
	The Company evaluated events from the date of the consolidated financial statements on December 31, 2013 through the issuance of those consolidated financial statements included in this Annual Report on Form 10-K. No events were identified requiring recognition in and/or disclosure in the consolidated financial statements.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Presentation [Policy Text Block]	'
	Basis of Presentation
	The Consolidated Financial Statements of BOK Financial Corporation (“BOK Financial” or “the Company”) have been prepared in conformity with accounting principles generally accepted in the United States ("U.S. GAAP"), including interpretations of U.S. GAAP issued by federal banking regulators and general practices of the banking industry. The consolidated financial statements include the accounts of BOK Financial and its subsidiaries, principally BOKF, NA (“the Bank”), BOSC, Inc., The Milestone Group, Inc. and Cavanal Hill Investment Management, Inc. All significant intercompany transactions are eliminated in consolidation. Certain prior year amounts have been reclassified to conform to the current year presentation.
	The consolidated financial statements include the assets, liabilities, non-controlling interests and results of operations of variable interest entities (“VIEs”) when BOK Financial is determined to be the primary beneficiary. Variable interest entities are generally defined as entities that either do not have sufficient equity to finance their activities without support from other parties or whose equity investors lack a controlling financial interest. See additional discussion of variable interest entities at Note 14 following.
Nature of Operations [Text Block]	'
	Nature of Operations
	BOK Financial, through its subsidiaries, provides a wide range of financial services to commercial and industrial customers, other financial institutions, municipalities, and consumers. These services include depository and cash management; lending and lease financing; mortgage banking; securities brokerage, trading and underwriting; and personal and corporate trust.
	The Bank operates as Bank of Oklahoma primarily in Tulsa and Oklahoma City metropolitan areas of the state of Oklahoma and Bank of Texas primarily in the Dallas, Fort Worth and Houston metropolitan areas of the state of Texas. In addition, the Bank does business as Bank of Albuquerque in Albuquerque, New Mexico; Colorado State Bank and Trust in Denver, Colorado; Bank of Arizona in Phoenix, Arizona; Bank of Kansas City in Kansas City, Missouri/Kansas and Bank of Arkansas in Northwest Arkansas. The Bank also operates the TransFund electronic funds network.
Use of Estimates [Policy Text Block]	'
	Use of Estimates
	Preparation of BOK Financial's consolidated financial statements requires management to make estimates of future economic activities, including loan collectability, prepayments and cash flows from customer accounts. These estimates are based upon current conditions and information available to management. Actual results may differ significantly from these estimates.
Acquisitions [Policy Text Block]	'
	Acquisitions
	Assets and liabilities acquired, including identifiable intangible assets, are recorded at fair value on the acquisition date. The purchase price includes consideration paid at closing and the estimated fair value of contingent consideration that will be paid in the future, subject to achieving defined performance criteria. Goodwill is recognized as the excess of the purchase price over the net fair value of assets acquired and liabilities assumed. The Consolidated Statements of Earnings include the results of operations from the acquisition date.
Goodwill and Intangible Assets [Policy Text Block]	'
	Goodwill and Intangible Assets
	Goodwill and intangible assets generally result from business combinations and are evaluated for each of BOK Financial's reporting units for impairment annually or more frequently if conditions indicate impairment. The evaluation of possible impairment of goodwill and intangible assets involves significant judgment based upon short-term and long-term projections of future performance.
	Reporting units are defined by the Company as the geographical market underlying each operating segment. This definition is consistent with the manner in which the chief operating decision maker assesses the performance of the Company and makes decisions concerning the allocation of resources. The Company qualitatively assesses whether it is more likely than not that the fair value of the reporting units are less than their carrying value. This assessment includes consideration of relevant events and circumstances including but not limited to macroeconomic conditions, industry and market conditions, the financial and stock performance of the Company and other relevant factors. Additional quantitative analysis may be undertaken through which the fair value of BOK Financial's reporting units is estimated by the discounted future earnings method. Income growth is projected for each reporting unit and a terminal value is computed. This projected income stream is converted to current fair value by using a discount rate that reflects a rate of return required by a willing buyer. Assumptions used to determine the fair value of the reporting units are compared to observable inputs, such as the market value of BOK Financial common stock. However, determination of the fair value of individual reporting units requires the use of significant unobservable inputs. There have been no changes in the techniques used to evaluate the carrying value of goodwill.
	Core deposit intangible assets are amortized using accelerated methods over the estimated lives of the acquired deposits. These assets generally have a weighted average life of 5 years. Other intangible assets are amortized using accelerated or straight-line methods, as appropriate, over the estimated benefit periods. These periods range from 5 years to 20 years. The net book values of identifiable intangible assets are evaluated for impairment when economic conditions indicate impairment may exist.
Cash and Cash Equivalents [Policy Text Block]	'
	Cash Equivalents
	Due from banks, funds sold (generally federal funds sold for one day), resell agreements (which generally mature within one to 30 days) and investments in money market funds are considered cash equivalents.
Securities [Policy Text Block]	'
	Securities
	Securities are identified as trading, investment (held to maturity) or available for sale at the time of purchase based upon the intent of management, liquidity and capital requirements, regulatory limitations and other relevant factors. Trading securities, which are acquired for profit through resale, are carried at fair value with unrealized gains and losses included in current period earnings. Investment securities are carried at amortized cost. Amortization is computed by methods that approximate level yield and is adjusted for changes in prepayment estimates. Securities identified as available for sale are carried at fair value. Unrealized gains and losses are recorded, net of deferred income taxes, as accumulated other comprehensive income in shareholders' equity. Available for sale securities are separately identified as pledged to creditors if the creditor has the right to sell or re-pledge the collateral.
	The purchase or sale of securities is recognized on a trade date basis. Realized gains and losses on sales of securities are based upon specific identification of the security sold. A receivable or payable is recognized for subsequent transaction settlement. BOK Financial will periodically commit to purchase to-be-announced residential mortgage-backed securities. These commitments are carried at fair value if they are considered derivative contracts. Investment securities may be sold or transferred to trading or available for sale classification in certain limited circumstances specified in generally accepted accounting principles. Securities meeting certain criteria may also be transferred from the available for sale classification to the investment securities portfolio at fair value on the date of transfer. The unrealized gain or loss at the date of transfer is retained in accumulated other comprehensive income and in the carrying value of the investment securities portfolio. Such amounts are amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of the premium or accretion of the discount on the transferred securities.
	On a quarterly basis, the Company performs separate evaluations of impaired debt investment and available for sale securities and equity available for sale securities to determine if the decline in fair value below the amortized cost is other-than-temporary.
	For debt securities, management determines whether it intends to sell or if it is more likely than not that it will be required to sell impaired securities. This determination considers current and forecasted liquidity requirements and securities portfolio management. If the Company intends to sell or it is more likely than not that it will be required to sell the impaired debt security, a charge is recognized against earnings for the entire unrealized loss. For all impaired debt securities for which there is no intent or expected requirement to sell, the evaluation considers all available evidence to assess whether it is more likely than not that all amounts due would not be collected according to the security's contractual terms. Any expected credit loss due to the inability to collect all amounts due according to the security's contractual terms is recognized as a charge against earning. Any remaining unrealized loss related to other factors would be recognized in other comprehensive income, net of taxes.
	For equity securities, management evaluates various factors including cause, severity and duration of the decline in value of the security and prospects for recovery, as well as the Company's intent and ability not to sell the security until the fair value exceeds amortized cost. If an unrealized loss is determined to be other-than-temporary, a charge is recognized against earnings for the difference between the security's amortized cost and fair value.
	BOK Financial has elected to carry certain non-trading securities at fair value with changes in fair value recognized in current period income. These securities are held with the intent that gains or losses will offset changes in the fair value of mortgage servicing rights or certain derivative instruments.
	Restricted equity securities represents equity interests the Company is required to hold in the Federal Reserve Banks and Federal Home Loan Banks. Restricted equity securities are carried at cost as theses securities do not have a readily determined fair value because ownership of these shares are restricted and lacks a market.
Derivatives Instruments [Policy Text Block]	'
	Derivative Instruments
	Derivative instruments may be used by the Company as part of its interest rate risk management programs or may be offered to customers. All derivative instruments are carried at fair value. The determination of fair value of derivative instruments considers changes in interest rates, commodity prices and foreign exchange rates. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customers or other counterparties reduces the fair value of asset contracts. Deterioration of our credit rating to below investment grade or the credit ratings of other counterparties could decrease the fair value of our derivative liabilities. Changes in fair value are generally reported in income as they occur.
	Derivative instruments used to manage interest rate risk consist primarily of interest rate swaps. These contracts modify the interest income or expense of certain assets or liabilities. Amounts receivable from or payable to counterparties are reported in interest income or expense using the accrual method. Changes in fair value of interest rate swaps are reported in other operating revenue - gain (loss) on derivatives, net.
	In certain circumstances, an interest rate swap may be designated as a fair value hedge and may qualify for hedge accounting. In these circumstances, changes in the full fair value of the hedged asset or liability, not only changes in fair value due to changes in the benchmark interest rate, is also recognized in earnings and may partially or completely offset changes in fair value of the interest rate swap. A fair value hedge is considered effective if the cumulative fair value adjustment of the interest rate swap is within a range of 80% to 120% of the cumulative change in the fair value of the hedged asset or liability. Any ineffectiveness, including ineffectiveness due to credit risk or ineffectiveness created when the fixed rate of the hedged asset or liability does not match the fixed rate of the interest rate swap, is recognized in earnings and reported in Gain (loss) on derivatives, net.
	Interest rate swaps may be designated as cash flow hedges of variable rate assets or liabilities, or of anticipated transactions. Changes in the fair value of interest rate swaps designated as cash flow hedges are recorded in accumulated other comprehensive income to the extent they are effective. The amount recorded in other comprehensive income is reclassified to earnings in the same periods as the hedged cash flows impact earnings. The ineffective portion of changes in fair value is reported in current earnings.
	If a derivative instrument that had been designated as a fair value hedge is terminated or if the hedge designation is removed or deemed to no longer be effective, the difference between the hedged items carrying value and its face amount is recognized into income over the remaining original hedge period. Similarly, if a derivative instrument that had been designated as a cash flow hedge is terminated or if the hedge designation is removed or deemed to no longer be effective, the amount remaining in accumulated other comprehensive income is reclassified to earnings in the same period as the hedged item.
	BOK Financial offers programs that permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchanges rates with derivative contracts. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize market risk from changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in other operating revenue - brokerage and trading revenue in the Consolidated Statements of Earnings.
	When bilateral netting agreements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by counterparty basis.
	Derivative contracts may also require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met.
Loans [Policy Text Block]	'
	Loans
	Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's financial difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential loans guaranteed by U.S. government agencies, are as follows.
	Interest is accrued at the applicable interest rate on the outstanding principal amount. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when 90 days or more past due or within 60 days of being notified of the borrower bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Payments received on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance.
	Loans to borrowers experiencing financial difficulties may be modified in troubled debt restructurings ("TDRs"). All TDRs are classified as nonaccruing. Modifications generally consist of extension of payment terms or interest rate concessions and may result either voluntarily through negotiations with the borrower or involuntarily through court order. Generally, principal and accrued but unpaid interest is not voluntarily forgiven.
	Performing loans may be renewed under then current collateral, debt service ratio and other underwriting standards. Nonaccruing loans may also be renewed and will remain classified as nonaccruing.
	All loans are charged-off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a TDR. The charge-off amount is determined through an evaluation of available cash resources and collateral value. Internally risk graded loans are evaluated quarterly and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status.
	Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable.
	Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company has the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheet. Guaranteed loans are considered to be impaired because we do not expect to receive all principal and interest based on the loan's contractual terms. The principal balance continues to be guaranteed, however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in TDRs in accordance with U.S. government agency guidelines. Interest continues to accrue at the modified rate. U.S. government guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.
Allowance for Loan Losses and Accrual for Off-Balance Sheet Credit Losses [Policy Text Block]	'
	Allowance for Loan Losses and Accrual for Off-Balance Sheet Credit Risk
	The appropriateness of the allowance for loan losses and accrual for off-balance sheet credit risk (collectively "Allowance for Credit Losses") is assessed by management based on an ongoing quarterly evaluation of the probable estimated losses inherent in the portfolio, including probable losses on outstanding loans and unused commitments to provide financing.
	Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its Allowance for Credits Losses. Classes are based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk.
	The allowance for loan losses consists of specific allowances attributed to impaired loans that have not yet been charged down to amounts we expect to recover, general allowances based on estimated loss rates by loan class and nonspecific allowances based on factors that affect more than one portfolio segment. In the fourth quarter of 2011, the Company enhanced its methodology for estimating general allowances by establishing specific loss rates for each loan class. There were no changes to the methodology for estimating general allowances during 2013 or 2012.
	Loans are considered to be impaired when it becomes probable that BOK Financial will be unable to collect all amounts due according to the contractual terms of the loan agreements. Internally risk graded loans are evaluated individually for impairment. Substantially all commercial and commercial real estate loans and certain residential mortgage and consumer loans are risk graded based on a quarterly evaluation of the borrowers' ability to repay.  Certain commercial loans and most residential mortgage and consumer loans are small balance, homogeneous pools of loans that are not risk graded. Non-risk graded loans are identified as impaired based on performance status. Generally, non-risk graded loans 90 days or more past due, modified in a troubled debt restructuring or in bankruptcy are considered to be impaired.
	Specific allowances for impaired loans are measured by an evaluation of estimated future cash flows discounted at the loans' initial effective interest rate or the fair value of collateral for certain collateral dependent loans. The fair value of real property held as collateral is generally based on third party appraisals that conform to Uniform Standards of Professional Appraisal Practice, less estimated selling costs. Appraised values are on an “as-is” basis and generally are not adjusted by the Company. Updated appraisals are obtained at least annually or more frequently if market conditions indicate collateral values may have declined. Collateral value of mineral rights is generally determined by our internal staff of engineers based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. The value of other collateral is generally determined by our special assets staff based on projected liquidation cash flows under current market conditions. Collateral values and available cash resources that support impaired loans are evaluated quarterly. Historical statistics may be used as a practical way to estimate impairment in limited situations, such as when a collateral dependent loan is identified as impaired at the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed. Estimates of future cash flows and collateral values require significant judgments and may be volatile.
	General allowances for unimpaired loans are based on an estimated loss rate by loan class. The appropriate historical gross loss rate for each loan class is determined by the greater of the current loss rate based on the most recent twelve months or a ten-year average gross loss rate. Recoveries are not directly considered in the estimation of historical loss rates. Recoveries generally do not follow predictable patterns and are not received until well-after the charge-off date as a result of protracted legal actions. For risk graded loans, historical gross loss rates are adjusted for changes in risk grading. For each loan class, the current weighted average risk grade is compared to the the long-term weighted average risk grade. This comparison determines whether credit risk in each loan class is increasing or decreasing. Historical loss rates are adjusted upward or downward in proportion to changes in average risk grading. General allowances for unimpaired loans also consider inherent risks identified for each loan class. Inherent risks consider loss rates that most appropriately represent the current credit cycle and other factors attributable to a specific loan class which have not yet been represented in the historical gross loss rates or risk grading. These factors include changes in commodity prices or engineering imprecision which may affect the value of reserves that secure our energy loan portfolio, construction risk that may affect commercial real estate loans, changes in regulations and public policy that may disproportionately impact health care loans and changes in loan products.
	Nonspecific allowances are maintained for risks beyond factors specific to a particular portfolio segment or loan class. These factors include trends in the economy in our primary lending areas, concentration in large-balance loans and other relevant factors.
	An accrual for off-balance sheet credit risk is included in Other liabilities. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses.
	A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received.
Transfers of Financial Assets [Policy Text Block]	'
	Transfers of Financial Assets
	BOK Financial transfers financial assets as part of its mortgage banking activities and periodically may transfer other financial assets. Transfers are recorded as sales when the criteria for surrender of control are met. Certain residential mortgage loans originated by the Company are held for sale and are carried at fair value based on sales commitments or market quotes and are reported separately in the Consolidated Balance Sheets. Changes in fair value are recorded in other operating revenue – mortgage banking revenue in the Consolidated Statements of Earnings.
	BOK Financial retains a repurchase obligation under underwriting representations and warranties related to residential mortgage loans transferred and generally retains the right to service the loans. The Company may incur a recourse obligation in limited circumstances. Separate accruals are recognized in Other liabilities in the Consolidated Balance Sheets for repurchase and recourse obligations.
	The Company may also retain a residual interest in excess cash flows generated by the assets. All assets obtained, including cash, servicing rights and residual interests, and all liabilities incurred, including recourse obligations, are initially recognized at fair value, all assets transferred are derecognized and any gain or loss on the sale is recognized in earnings. Subsequently, servicing rights and residual interests are carried at fair value with changes in fair value recognized in earnings as they occur.
Real Estate and Other Repossessed Assets [Policy Text Block]	'
	Real Estate and Other Repossessed Assets
	Real estate and other repossessed assets are acquired in partial or total forgiveness of loans. These assets are carried at the lower of cost, which is determined by fair value at date of foreclosure less estimated disposal costs, or current fair value less estimated disposal costs. Decreases in fair value below cost are recognized as asset-specific valuation allowances which may be reversed when supported by future increases in fair value. Fair values of real estate are based on “as is” appraisals which are updated at least annually or more frequently for certain asset types or assets located in certain distressed markets. Fair values based on appraisals are generally considered to be based on significant other observable inputs. The Company also considers decreases in listing price and other relevant information in quarterly evaluations and reduces the carrying value of real estate and other repossessed assets when necessary. Fair values based on list prices and other relevant information are generally considered to be based on significant unobservable inputs. Additional costs incurred to complete real estate and other repossessed assets may increase the carrying value, up to current fair value based on “as completed” appraisals. The fair value of mineral rights included in repossessed assets are generally determined by our internal staff of engineers based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. The value of other repossessed assets is generally determined by our special assets staff based on projected liquidation cash flows under current market conditions. Income generated by these assets is recognized as received. Operating expenses are recognized as incurred. Gains or losses on sales of real estate and other repossessed assets are based on the cash proceeds received less the cost basis of the asset, net of any valuation allowances.
Premises and Equipment [Policy Text Block]	'
	Premises and Equipment
	Premises and equipment are carried at cost, including capitalized interest when appropriate, less accumulated depreciation and amortization. Depreciation and amortization are computed on a straight-line basis over the estimated useful lives of the assets or, for leasehold improvements, over the shorter of the estimated useful lives or remaining lease terms. Useful lives range from 5 years to 40 years for buildings and improvements, 3 years to 10 years for software and 3 years to 10 years for furniture and equipment. Construction in progress represents construction and systems projects underway that have not yet been placed into service. Depreciation and amortization begin once the assets are placed into service. Repair and maintenance costs are charged to expense as incurred.
	Premises no longer used by the Company are transferred to real estate and other repossessed assets. The transferred amount is the lower of cost less accumulated depreciation or fair value less estimated disposal costs as of the transfer date.
	Rent expense for leased premises is recognized as incurred over the lease term. The effects of rent holidays, significant rent escalations and other adjustments to rent payments are recognized on a straight-line basis over the lease term.
Mortgage Servicing Rights [Policy Text Block]	'
	Mortgage Servicing Rights
	Mortgage servicing rights may be purchased or may be recognized when mortgage loans are originated pursuant to an existing plan for sale or, if no such plan exists, when the mortgage loans are sold. All mortgage servicing rights are carried at fair value. Changes in the fair value are recognized in earnings as they occur.
	There is no active market for trading in mortgage servicing rights after origination. A cash flow model is used to determine fair value. Key assumptions and estimates, including projected prepayment speeds and assumed servicing costs, earnings on escrow deposits, ancillary income and discount rates, used by this model are based on current market sources. Assumptions used to value mortgage servicing rights are considered significant unobservable inputs. A separate third party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated daily for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial's servicing portfolio. Fair value estimates from outside sources are received at least annually to corroborate the results of the valuation model.
Federal and State Income Taxes [Policy Text Block]	'
	Federal and State Income Taxes
	BOK Financial and its subsidiaries file consolidated tax returns. The subsidiaries provide for income taxes on a separate return basis and remit to BOK Financial amounts determined to be currently payable. BOK Financial is agent for its subsidiaries under the Company's tax sharing agreements and has no ownership rights to any refunds received for the benefit of its subsidiaries.
	Current income tax expense or benefit is based on an evaluation that considers estimated taxable income, tax credits, and statutory federal and state income tax rates.  The amount of current income tax expense or benefit recognized in any period may differ from amounts reported to taxing authorities. Annually, tax returns are filed with each jurisdiction where they Company conducts business and recognized current income tax expense or benefit is adjusted to the filed tax returns.
	Deferred tax assets and liabilities are based upon the differences between the values of assets and liabilities as recognized in the financial statements and their related tax basis using enacted tax rates in effect for the year in which the differences are expected to be recovered or settled. A valuation allowance is provided when it is more likely than not that some portion of the entire deferred tax asset may not be realized based on taxes previously paid in net loss carry-back periods and other factors.
	BOK Financial has unrecognized tax benefits, which are included in accrued current income taxes payable, for the uncertain portion of recorded tax benefits and related interest. These uncertainties result from the application of complex tax laws, rules, regulations and interpretations, primarily in state taxing jurisdictions. Unrecognized tax benefits are assessed quarterly and may be adjusted through current income tax expense in future periods based on changing facts and circumstances, completion of examinations by taxing authorities or expiration of a statute of limitations. Estimated penalties and interest on uncertain tax positions are recognized in income tax expense.
Employee Benefit Plans [Policy Text Block]	'
	Employee Benefit Plans
	BOK Financial sponsors a defined benefit cash balance pension plan (“Pension Plan”), qualified profit sharing plan (“Thrift Plan”) and employee health care plans. Pension Plan costs, which are based upon actuarial computations of current costs, are expensed annually. Unrecognized prior service cost and net gains or losses are amortized on a straight-line basis over the lesser of the average remaining service periods of the participants or 4 years. Employer contributions to the Pension Plan are in accordance with Federal income tax regulations. Pension Plan benefits were curtailed as of April 1, 2006. No participants may be added to the Pension Plan and no additional service benefits will be accrued.
	BOK Financial recognizes the funded status of its employee benefit plans. For a pension plan, the funded status is the difference between the fair value of plan assets and the projected benefit obligation measured as of the fiscal year-end date. Adjustments required to recognize the Pension Plan's net funded status are made through accumulated other comprehensive income, net of deferred income taxes.
	Employer contributions to the Thrift Plan, which matches employee contributions subject to percentage and years of service limits, are expensed when incurred. BOK Financial recognizes the expense of health care benefits on the accrual method.
Stock Compensation Plans [Policy Text Block]	'
	Stock Compensation Plans
	BOK Financial awards stock options and non-vested common shares as compensation to certain officers. Grant date fair value of stock options is based on the Black-Scholes option pricing model. Stock options generally have graded vesting over 7 years. Each tranche is considered a separate award for valuation and compensation cost recognition. Grant date fair value of non-vested shares is based on the current market value of BOK Financial common stock. Non-vested shares awarded prior to 2013 generally cliff vest in 5 years. Non-vested shares awarded in January 2013 generally cliff vest in 3 years and are subject to a two year holding period after vesting.
	Compensation cost is recognized as expense over the service period, which is generally the vesting period. Expense is reduced for estimated forfeitures over the vesting period and adjusted for actual forfeitures as they occur. Stock-based compensation awarded to certain officers has performance conditions that affect the number of awards granted. Compensation cost is adjusted based on the probable outcome of the performance conditions. Excess tax benefits from share-based payments recognized in capital surplus are determined by the excess of tax benefits recognized over the tax effect of compensation cost recognized.
	Certain executive officers may defer the recognition of income from stock-based compensation for income tax purposes and to diversify the deferred income into alternative investments. Stock-based compensation granted to these officers is considered liability awards. Changes in the fair value of liability awards are recognized as compensation expense in the period of the change.
Other Operating Revenue [Policy Text Block]	'
	Other Operating Revenue
	Fees and commission revenue is recognized at the time the related services are provided or products are sold and may be accrued when necessary. Accrued fees and commissions are reversed against revenue if amounts are subsequently deemed to be uncollectible. Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and on a net basis whenever we act as a broker for products or services of others.
	Brokerage and trading revenue includes changes in the fair value of securities held for trading purposes and derivatives held for customer risk management programs, including credit losses on trading securities and derivatives, commissions earned from the retail sale of securities, mutual funds and other financial instruments, and underwriting and financial advisory fees.
	Transaction card revenue includes merchant discounts fees, electronic funds transfer network fees and check card fees. Merchant discount fees represent fees paid by customers for account management and electronic processing of transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes the Bank. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.
	Trust fees and commissions include revenue from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided.
	Deposit service charges and fees are recognized at least quarterly in accordance with published deposit account agreement and disclosure statement for retail accounts or contractual agreement for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances.
Newly Adopted and Pending Accounting Pronouncements [Policy Text Block]	'
	Newly Adopted and Pending Accounting Pronouncements
	Financial Accounting Standards Board ("FASB")
	FASB Accounting Standards Update No. 2011-11, Disclosures About Offsetting Assets and Liabilities (“ASU 2011-11”)
	On December 16, 2011, the FASB issued ASU 2011-11 which contains new disclosure requirements regarding the nature of an entity's right of setoff and related arrangements associated with its financial instruments and derivative instruments. The new disclosures are anticipated to facilitate comparison between financial statements prepared under generally accepted accounting principles in the United States of America and International Financial Reporting Standards by providing information about both gross and net exposures. The new disclosure requirements were effective for interim and annual reporting periods beginning on or after January 1, 2013.
	FASB Accounting Standards Update No. 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities (ASU 2013-01)
	On January 31, 2013, FASB issued ASU 2013-01 which clarified that the scope of ASU 2011-11 applied for derivative contracts accounted for in accordance with Topic 815, Derivative and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and securities borrowing and securities lending transaction that are either offset in accordance with Section 210-20-45 or Section 815-10-45 or subject to an enforceable master netting arrangement or similar agreement. ASU 2013-01 was effective for the Company on January 1, 2013.
	FASB Accounting Standards Update No. 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income ("ASU 2013-02")
	On February 7, 2013 the FASB issued ASU 2013-02 which sets the requirements for presentation of significant reclassifications out of accumulated other comprehensive income for both items reclassified in their entirety and the respective line items in Statement of Earnings they are being reclassified into and for other amounts that are not reclassified in their entirety to net income during the reporting period, such as items being reclassified to balance sheet accounts. ASU 2013-02 was effective for the Company on January 1, 2013 and is to be applied prospectively.
	FASB Accounting Standards Update No. 2013-08, Financial Services – Investment Companies (Topic 946): Amendments to the Scope, Measurement, and Disclosure Requirements (ASU 2013-08)
	On June 7, 2013, the FASB issued ASU 2013-08 which amends the criteria an entity would need to meet to qualify as an investment company under ASC 946, Financial Services - Investment Companies. ASU 2013-08 also provides additional implementation guidance for the assessment and requires additional disclosures. ASU 2013-08 is effective prospectively during interim and annual periods beginning after December 15, 2013, with early adoption prohibited. The adoption of ASU 2013-08 is not expected to have a material impact on the Company's consolidated financial statements.
	FASB Accounting Standards Update No. 2014-01, Accounting for Investments in Qualified Affordable Housing Projects (ASU 2014-01)
	On January 15, 2014, the FASB issued ASU 2014-01 to simplify the amortization method an entity uses and modify the criteria to elect a measurement and presentation alternative, including the simplified amortization method, for certain investments in qualified affordable housing projects. This alternative permits the entity to present the investment's performance net of the related tax benefits as part of income tax expense. ASU 2014-01 is effective for the Company for interim and annual periods beginning after December 15, 2014. Early adoption is permitted. Adoption of ASU 2014-01 may affect income statement presentation, but otherwise is not expected to have a material impact on the Company's consolidated financial statements.
	FASB Accounting Standards Update No. 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans Upon Foreclosure
	On January 17, 2014, the FASB issued ASU 2014-04 to clarify when an entity is considered to have obtained physical possession (from an in-substance possession or foreclosure) of a residential real estate property collateralizing a mortgage loan. Upon physical possession of such real property, an entity is required to reclassify the nonperforming mortgage loan to other real estate owned. ASU is effective for the Company for interim and annual periods beginning after December 15, 2014. Early adoption is permitted. Adoption of ASU 2014-04 is not expected to have a material impact on the Company's consolidated financial statements.

Securities_Tables

Securities (Tables)	12 Months Ended
	Dec. 31, 2013
Marketable Securities [Abstract]	'
Trading Securities [Table Text Block]	'
	The fair value and net unrealized gain (loss) included in trading securities is as follows (in thousands):
			December 31, 2013								December 31, 2012
			Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain (Loss)
	U.S. Government agency debentures		$	34,120			$	77			$	16,545			$	(57	)
	U.S. agency residential mortgage-backed securities		21,011				123				86,361				447
	Municipal and other tax-exempt securities		27,350				(182		)		90,326				(226		)
	Other trading securities		9,135				(7		)		20,870				(13		)
	Total		$	91,616			$	11			$	214,102			$	151
Investment Securities (Held-to-Maturity) [Table Text Block]	'
	The amortized cost and fair values of investment securities are as follows (in thousands):
			December 31, 2013
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	440,187			$	440,187			$	439,870			$	2,452			$	(2,769	)
	U.S. agency residential mortgage-backed securities – Other		48,351				50,182				51,864				1,738				(56		)
	Other debt securities		187,509				187,509				195,393				8,497				(613		)
	Total		$	676,047			$	677,878			$	687,127			$	12,687			$	(3,438	)
	1	Carrying value includes $1.8 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
	2	Gross unrealized gains and losses are not recognized in AOCI in the Consolidated Balance Sheets.
			December 31, 2012
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	232,700			$	232,700			$	235,940			$	3,723			$	(483	)
	U.S. agency residential mortgage-backed securities – Other		77,726				82,767				85,943				3,176				—
	Other debt securities		184,067				184,067				206,575				22,528				(20		)
	Total		$	494,493			$	499,534			$	528,458			$	29,427			$	(503	)
	1	Carrying value includes $5.0 million of net unrealized gain which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
	2	Gross unrealized gains and losses are not recognized in AOCI in the Consolidated Balance Sheets.
	In 2011, the Company transferred certain U.S. government agency residential mortgage-backed securities from the available for sale portfolio to the investment securities (held-to-maturity) portfolio as the Company has the positive intent and ability to hold these securities to maturity. No gains or losses were recognized in the Consolidated Statement of Earnings at the time of the transfer. Transfers of debt securities into the investment securities portfolio (held-to-maturity) are made at fair value at the date of transfer. The unrealized holding gain or loss at the date of transfer is retained in Accumulated Other Comprehensive Income and in the carrying value of the investment securities portfolio. Such amounts are amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of the premium or accretion of the discount on the transferred securities. At the time of transfer, the fair value totaled $131 million, amortized cost totaled $118 million and the pretax unrealized gain totaled $13 million.
	The amortized cost and fair values of investment securities at December 31, 2013, by contractual maturity, are as shown in the following table (dollars in thousands):
			Less than				One to				Six to				Over				Total				Weighted
			One Year				Five Years				Ten Years				Ten Years								Average
																							Maturity²
	Municipal and other tax-exempt:
	Carrying value		$	33,821			$	308,451			$	57,873			$	40,042			$	440,187			4.43
	Fair value		33,996				308,701				57,168				40,005				439,870
	Nominal yield¹		2.91		%		1.66		%		2.65		%		4.75		%		2.23		%
	Other debt securities:
	Carrying value		$	9,138			$	33,043			$	44,539			$	100,789			$	187,509			8.63
	Fair value		9,140				33,269				44,686				108,298				195,393
	Nominal yield		4.08		%		5.02		%		5.27		%		6.27		%		5.71		%
	Total fixed maturity securities:
	Carrying value		$	42,959			$	341,494			$	102,412			$	140,831			$	627,696			5.69
	Fair value		43,136				341,970				101,854				148,303				635,263
	Nominal yield		3.16		%		1.98		%		3.79		%		5.84		%		3.27		%
	Residential mortgage-backed securities:
	Carrying value																		$	50,182			³
	Fair value																		51,864
	Nominal yield4																		2.73		%
	Total investment securities:
	Carrying value																		$	677,878
	Fair value																		687,127
	Nominal yield																		3.23		%
	1.	Calculated on a taxable equivalent basis using a 39% effective tax rate.
	2.	Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.
	3.	The average expected lives of residential mortgage-backed securities were 3.1 years based upon current prepayment assumptions.
	4.	The nominal yield on residential mortgage-backed securities is based upon prepayment assumptions at the purchase date. Actual yields earned may differ significantly based upon actual prepayments. See Quarterly Financial Summary - Unaudited for current yields on the investment securities portfolio.
Available For Sale Securities [Table Text Block]	'
	The amortized cost and fair value of available for sale securities are as follows (in thousands):
			December 31, 2013
			Amortized				Fair				Gross Unrealized1
			Cost				Value				Gain				Loss				OTTI²
	U.S. Treasury		$	1,042			$	1,042			$	—			$	—			$	—
	Municipal and other tax-exempt		73,232				73,775				1,606				(1,063		)		—
	Residential mortgage-backed securities:
	U. S. government agencies:
	FNMA		4,224,327				4,232,332				68,154				(60,149		)		—
	FHLMC		2,308,341				2,293,943				25,813				(40,211		)		—
	GNMA		1,151,225				1,152,128				9,435				(8,532		)		—
	Other		36,296				37,607				1,311				—				—
	Total U.S. government agencies		7,720,189				7,716,010				104,713				(108,892		)		—
	Private issue:
	Alt-A loans		104,559				107,212				4,386				—				(1,733		)
	Jumbo-A loans		109,622				113,887				4,974				—				(709		)
	Total private issue		214,181				221,099				9,360				—				(2,442		)
	Total residential mortgage-backed securities		7,934,370				7,937,109				114,073				(108,892		)		(2,442		)
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,100,146				2,055,804				1,042				(45,384		)		—
	Other debt securities		35,061				35,241				368				(188		)		—
	Perpetual preferred stock		22,171				22,863				705				(13		)		—
	Equity securities and mutual funds		19,069				21,328				2,326				(67		)		—
	Total		$	10,185,091			$	10,147,162			$	120,120			$	(155,607	)		$	(2,442	)
	1 Gross unrealized gain/loss recognized in AOCI in the consolidated balance sheet.
	2 Amounts represent unrealized loss that remains in AOCI after an other-than-temporary credit loss has been recognized in income.
			December 31, 2012
			Amortized				Fair				Gross Unrealized¹
			Cost				Value				Gain				Loss				OTTI²
	U.S. Treasury		$	1,000			$	1,002			$	2			$	—			$	—
	Municipal and other tax-exempt		84,892				87,142				2,414				(164		)		—
	Residential mortgage-backed securities:
	U. S. government agencies:
	FNMA		5,308,463				5,453,549				146,247				(1,161		)		—
	FHLMC		2,978,608				3,045,564				66,956				—				—
	GNMA		1,215,554				1,237,041				21,487				—				—
	Other		148,025				153,667				5,642				—				—
	Total U.S. government agencies		9,650,650				9,889,821				240,332				(1,161		)		—
	Private issue:
	Alt-A loans		124,314				123,174				1,440				—				(2,580		)
	Jumbo-A loans		198,588				201,989				5,138				(134		)		(1,603		)
	Total private issue		322,902				325,163				6,578				(134		)		(4,183		)
	Total residential mortgage-backed securities		9,973,552				10,214,984				246,910				(1,295		)		(4,183		)
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		890,746				895,075				5,006				(677		)		—
	Other debt securities		35,680				36,389				709				—				—
	Perpetual preferred stock		22,171				25,072				2,901				—				—
	Equity securities and mutual funds		24,593				27,557				3,242				(278		)		—
	Total		$	11,032,634			$	11,287,221			$	261,184			$	(2,414	)		$	(4,183	)
	1 Gross unrealized gain/loss recognized in AOCI in the consolidated balance sheet
	2 Amounts represent unrealized loss that remains in AOCI after an other-than-temporary credit loss has been recognized in income.
	The amortized cost and fair values of available for sale securities at December 31, 2013, by contractual maturity, are as shown in the following table (dollars in thousands):
		Less than				One to				Six to				Over				Total				Weighted
		One Year				Five Years				Ten Years				Ten Years6								Average
																						Maturity5
	U.S. Treasuries:
	Amortized cost	$	1,042			$	—			$	—			$	—			$	1,042			1.16
	Fair value	1,042				—				—				—				1,042
	Nominal yield	0.24		%		—		%		—		%		—		%		0.24		%
	Municipal and other tax-exempt:
	Amortized cost	1,856				36,183				3,239				31,954				73,232				10.48
	Fair value	1,882				37,470				3,451				30,972				73,775
	Nominal yield¹	6.35		%		3.84		%		6.34		%		5.41		%		4.7		%
	Commercial mortgage-backed securities:
	Amortized cost	—				626,327				1,104,095				369,724				2,100,146				9.41
Fair value	—				619,219				1,073,471				363,114				2,055,804
Nominal yield	—		%		1.22		%		1.43		%		1.25		%		1.34		%
Other debt securities:
Amortized cost	24,992				5,169				—				4,900				35,061				5.31
Fair value	25,270				5,259				—				4,712				35,241
Nominal yield	1.74		%		2.12		%		—		%		1.54		%		1.77		%
Total fixed maturity securities:
Amortized cost	$	27,890			$	667,679			$	1,107,334			$	406,578			$	2,209,481			9.38
Fair value	28,194				661,948				1,076,922				398,798				2,165,862
Nominal yield	2.05		%		1.37		%		1.44		%		1.58		%		1.45		%
Residential mortgage-backed securities:
Amortized cost																	$	7,934,370			2
Fair value																	7,937,109
Nominal yield4																	1.9		%
Equity securities and mutual funds:
Amortized cost																	$	41,240			³
Fair value																	44,191
Nominal yield																	1.33		%
Total available-for-sale securities:
Amortized cost																	$	10,185,091
Fair value																	10,147,162
Nominal yield																	1.8		%
1	Calculated on a taxable equivalent basis using a 39% effective tax rate.
2	The average expected lives of mortgage-backed securities were 3.3 years based upon current prepayment assumptions.
3	Primarily common stock and preferred stock of corporate issuers with no stated maturity.
4	The nominal yield on mortgage-backed securities is based upon prepayment assumptions at the purchase date. Actual yields earned may differ significantly based upon actual prepayments. See Quarterly Financial Summary –– Unaudited following for current yields on available for sale securities portfolio.
5	Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.
6	Nominal yield on municipal and other tax-exempt securities and other debt securities with contractual maturity dates over ten years are based on variable rates which generally are reset within 35 days.
Sales of available for sale securities resulted in gains and losses as follows (in thousands):
	Year Ended December 31,
	2013				2012				2011
Proceeds	$	2,436,093			$	1,744,662			2,725,760
Gross realized gains	25,711				41,191				41,284
Gross realized losses	(14,991		)		(7,346		)		(7,140	)
Related federal and state income tax expense	4,170				13,166				13,282
Securities Pledged As Collateral [Table Text Block]	'
	A summary of investment and available for sale securities that have been pledged as collateral for repurchase agreements, public trust funds on deposit and for other purposes, as required by law was as follows (in thousands):
		December 31,
		2013				2012
	Investment:
	Carrying value	$	89,087			$	117,346
	Fair value	91,804				121,647
	Available for sale:
	Amortized cost	5,171,782				4,070,250
	Fair value	5,133,530				4,186,390
	The secured parties do not have the right to sell or re-pledge these securities. At December 31, 2012, municipal trading securities with a fair value of $13 million were pledged as collateral on a line of credit for the trading activities of BOSC, Inc. Under the terms of the credit agreement, the creditor has the right to sell or repledge the collateral.
Schedule of Unrealized Loss on Investments [Table Text Block]	'
	ds):
			Number of Securities			Less Than 12 Months								12 Months or Longer								Total
						Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
						Value				Loss				Value				Loss				Value				Loss
	Investment:
	Municipal and other tax-exempt		107			$	166,382			$	1,921			$	53,073			$	848			$	219,455			$	2,769
	U.S. Agency residential mortgage-backed securities – Other		2			15,224				56				—				—				15,224				56
	Other debt securities		30			10,932				549				777				64				11,709				613
	Total investment		139			$	192,538			$	2,526			$	53,850			$	912			$	246,388			$	3,438
			Number of Securities			Less Than 12 Months								12 Months or Longer								Total
						Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
						Value				Loss				Value				Loss				Value				Loss
	Available for sale:
	Municipal and other tax-exempt		27			$	13,286			$	245			$	17,805			$	818			$	31,091			$	1,063
	Residential mortgage-backed securities:
	U. S. agencies:
	FNMA		81			2,281,491				60,149				—				—				2,281,491				60,149
	FHLMC		50			1,450,588				40,211				—				—				1,450,588				40,211
	GNMA		27			647,058				8,532				—				—				647,058				8,532
	Total U.S. agencies		158			4,379,137				108,892				—				—				4,379,137				108,892
	Private issue1:
	Alt-A loans		7			11,043				756				30,774				977				41,817				1,733
	Jumbo-A loans		9			14,642				709				—				—				14,642				709
	Total private issue		16			25,685				1,465				30,774				977				56,459				2,442
	Total residential mortgage-backed securities		174			4,404,822				110,357				30,774				977				4,435,596				111,334
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		123			1,800,717				45,302				2,286				82				1,803,003				45,384
	Other debt securities		3			4,712				188				—				—				4,712				188
	Perpetual preferred stocks		1			4,988				13				—				—				4,988				13
	Equity securities and mutual   funds		118			2,070				67				—				—				2,070				67
	Total available for sale		446			$	6,230,595			$	156,172			$	50,865			$	1,877			$	6,281,460			$	158,049
	1Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:
	Alt-A loans		7			11,043			756			30,774			977			41,817			1,733
	Jumbo-A loans		9			14,642			709			—			—			14,642			709
	Temporarily Impaired Securities as of December 31, 2012
	(In thousands)
			Number of Securities			Less Than 12 Months								12 Months or Longer								Total
						Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
						Value				Loss				Value				Loss				Value				Loss
	Investment:
	Municipal and other tax- exempt		53			$	92,768			$	483			$	—			$	—			$	92,768			$	483
	U.S. Agency residential mortgage-backed securities – Other		—			—				—				—				—				—				—
	Other debt securities		14			881				20				—				—				881				20
	Total investment		67			$	93,649			$	503			$	—			$	—			$	93,649			$	503
			Number of Securities			Less Than 12 Months								12 Months or Longer								Total
						Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
						Value				Loss				Value				Loss				Value				Loss
	Available for sale:
	Municipal and other tax-exempt		38			$	6,150			$	11			$	26,108			$	153			$	32,258			$	164
	Residential mortgage-backed securities:
	U. S. agencies:
	FNMA		12			161,828				1,161				—				—				161,828				1,161
	FHLMC		—			—				—				—				—				—				—
	GNMA		—			—				—				—				—				—				—
	Total U.S. agencies		12			161,828				1,161				—				—				161,828				1,161
	Private issue1:
	Alt-A loans		12			—				—				87,907				2,580				87,907				2,580
	Jumbo-A loans		11			—				—				43,252				1,737				43,252				1,737
	Total private issue		23			—				—				131,159				4,317				131,159				4,317
	Total residential mortgage-backed securities		35			161,828				1,161				131,159				4,317				292,987				5,478
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		8			275,065				677				—				—				275,065				677
	Other debt securities		3			4,899				—				—				—				4,899				—
	Perpetual preferred stocks		—			—				—				—				—				—				—
	Equity securities and mutual funds		22			202				1				2,161				277				2,363				278
Total available for sale		106			$	448,144			$	1,850			$	159,428			$	4,747			$	607,572			$	6,597
1	Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:
Alt-A loans		12			$	—			$	—			$	87,907			$	2,580			$	87,907			$	2,580
Jumbo-A loans		10			—				—				29,128				1,602				29,128				1,602
Schedule of Investments by Lowest Current Credit Rating [Table Text Block]	'
	At December 31, 2013, the composition of the Company’s investment and available for sale securities portfolios by the lowest current credit rating assigned by any of the three nationally-recognized rating agencies is as follows (in thousands):
											AAA - AA
			U.S. Govt/GSE 1																A - BBB								Below Investment Grade				Not Rated				Total
			Carrying				Fair				Carrying				Fair				Carrying				Fair				Carrying		Fair		Carrying		Fair		Carrying		Fair
			Value				Value				Value				Value				Value				Value				Value		Value		Value		Value		Value		Value
	Investment:
	Municipal and other tax-exempt		$	—			$	—			$	280,583			$	278,789			$	20,784			$	21,012			$	—	$	—	$	138,820	$	140,069	$	440,187	$	439,870
	Mortgage-backed securities -- other		50,182				51,864				—				—				—				—				—		—		—		—		50,182		51,864
	Other debt securities		—				—				167,463				175,921				—				—				—		—		20,046		19,472		187,509		195,393
	Total investment securities		$	50,182			$	51,864			$	448,046			$	454,710			$	20,784			$	21,012			$	—	$	—	$	158,866	$	159,541	$	677,878	$	687,127
			U.S. Govt / GSE 1								AAA - AA																Below Investment Grade				Not Rated				Total
																			A - BBB
			Amortized Cost				Fair				Amortized Cost				Fair Value				Amortized Cost				Fair Value				Amortized Cost		Fair Value		Amortized Cost		Fair Value		Amortized Cost		Fair
							Value																														Value
	Available for Sale:
	U.S. Treasury		$	1,042			$	1,042			$	—			$	—			$	—			$	—			$	—	$	—	$	—	$	—	$	1,042	$	1,042
	Municipal and other tax-exempt		—				—				44,969				45,984				15,854				15,545				—		—		12,409		12,246		73,232		73,775
	Residential mortgage-backed securities:
	U. S. government agencies:
	FNMA		4,224,327				4,232,332				—				—				—				—				—		—		—		—		4,224,327		4,232,332
	FHLMC		2,308,341				2,293,943				—				—				—				—				—		—		—		—		2,308,341		2,293,943
	GNMA		1,151,225				1,152,128				—				—				—				—				—		—		—		—		1,151,225		1,152,128
	Other		36,296				37,607				—				—				—				—				—		—		—		—		36,296		37,607
	Total U.S. government agencies		7,720,189				7,716,010				—				—				—				—				—		—		—		—		7,720,189		7,716,010
	Private issue:
	Alt-A loans		—				—				—				—				—				—				104,559		107,212		—		—		104,559		107,212
	Jumbo-A loans		—				—				—				—				—				—				109,622		113,887		—		—		109,622		113,887
	Total private issue		—				—				—				—				—				—				214,181		221,099		—		—		214,181		221,099
	Total residential mortgage-backed securities		7,720,189				7,716,010				—				—				—				—				214,181		221,099		—		—		7,934,370		7,937,109
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,100,146				2,055,804				—				—				—				—				—		—		—		—		2,100,146		2,055,804
	Other debt securities		—				—				4,900				4,712				30,161				30,529				—		—		—		—		35,061		35,241
	Perpetual preferred stock		—				—				—				—				11,406				11,859				10,765		11,004		—		—		22,171		22,863
	Equity securities and mutual funds		—				—				4				457				—				—				—		—		19,065		20,871		19,069		21,328
	Total available for sale securities		$	9,821,377			$	9,772,856			$	49,873			$	51,153			$	57,421			$	57,933			$	224,946	$	232,103	$	31,474	$	33,117	$	10,185,091	$	10,147,162
	1	U.S. government and government sponsored enterprises are not rated by the nationally-recognized rating agencies as these securities are guaranteed by agencies of the U.S. government or government-sponsored enterprises.
Schedule of Primary Assumptions Used in Other-Than-Temporary Impairment Evaluation [Table Text Block]	'
		December 31,
		2013		2012
	Unemployment rate	Increasing to 7.3% over the next 12 months and remain at 7.3% thereafter		Increasing to 8.5% over the next 12 months, dropping to 8% over the following 21 months and holding at 8% thereafter.
	Housing price appreciation/depreciation	Starting with current depreciated housing prices based on information derived from the FHFA1, appreciating 4% over the next 12 months, then flat for the following 12 months and then appreciating at 2% per year thereafter.		Starting with current depreciated housing prices based on information derived from the FHFA1, depreciating 2% over the next 12 months, then flat for the following 12 months and then appreciating at 2% per year thereafter.
	Estimated liquidation costs	Reflect actual historical liquidations costs observed on Jumbo and Alt-A residential mortgage loans in securities owned by the Company.		Reflect actual historical liquidations costs observed on Jumbo and Alt-A residential mortgage loans in securities owned by the Company.
	Discount rates	Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.		Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.
Schedule of Privately Issued Residential Mortgage-backed Securities [Table Text Block]	'
														Credit Losses Recognized
														Year ended
														December 31, 2013							Life-to-date
			Number of Securities			Amortized Cost				Fair Value				Number of			Amount				Number of Securities			Amount
														Securities
	Alt-A		16			$	104,559			$	107,212			4			$	938			16			$	49,126
	Jumbo-A		31			109,622				113,887				—			—				29			18,220
	Total		47			$	214,181			$	221,099			4			$	938			45			$	67,346
Rollforward Other-than-temporary Impairment Credit Losses Recognized in Earnings [Table Text Block]	'
			Year Ended December 31,
			2013				2012
	Balance of credit-related OTTI recognized on available for sale debt, beginning of period		$	75,228			$	76,131
	Additions for credit-related OTTI not previously recognized		618				113
	Additions for increases in credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost		320				6,780
	Reductions for change in intent to hold before recovery		(3,589		)		—
	Sales		(5,231		)		(7,796		)
	Balance of credit-related OTTI recognized on available for sale debt securities, end of period		$	67,346			$	75,228
Fair Value Option Securities [Table Text Block]	'
	The fair value and net unrealized gain (loss) included in Fair value option securities is as follows (in thousands):
			December 31, 2013								December 31, 2012
			Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain (Loss)
	U.S. agency residential mortgage-backed securities		$	157,431			$	(8,378	)		$	257,040			$	3,314
	Corporate debt securities		—				—				26,486				1,409
	Other securities		$	9,694			$	209			$	770			$	47
	Total		$	167,125			$	(8,169	)		$	284,296			$	4,770

Derivatives_Tables

Derivatives (Tables)	12 Months Ended
	Dec. 31, 2013
Derivative Instrument Detail [Abstract]	'
Derivative Contracts [Table Text Block]	'
	The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at December 31, 2013 (in thousands):
			Assets
			Notional1		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	10,817,159	$	102,921		$	(46,623	)	$	56,298		$	—		$	56,298
	Interest rate swaps		1,283,379		44,124			—			44,124			(731		)	43,393
	Energy contracts		1,263,266		48,078			(29,957		)	18,121			(2,575		)	15,546
	Agricultural contracts		100,886		2,060			(1,166		)	894			—			894
	Foreign exchange contracts		136,543		136,543			—			136,543			(2,147		)	134,396
	Equity option contracts		210,816		17,957			—			17,957			(3,472		)	14,485
	Total customer risk management programs		13,812,049		351,683			(77,746		)	273,937			(8,925		)	265,012
	Interest rate risk management programs		—		—			—			—			—			—
	Total derivative contracts		$	13,812,049	$	351,683		$	(77,746	)	$	273,937		$	(8,925	)	$	265,012
			Liabilities
			Notional¹		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	10,982,049	$	99,830		$	(46,623	)	$	53,207		$	—		$	53,207
	Interest rate swaps		1,283,379		44,377			—			44,377			(17,853		)	26,524
	Energy contracts		1,216,426		46,095			(29,957		)	16,138			(6,055		)	10,083
	Agricultural contracts		99,191		2,009			(1,166		)	843			—			843
	Foreign exchange contracts		135,237		135,237			—			135,237			(294		)	134,943
	Equity option contracts		210,816		17,957			—			17,957			—			17,957
	Total customer risk management programs		13,927,098		345,505			(77,746		)	267,759			(24,202		)	243,557
	Interest rate risk management programs		47,000		3,628			—			3,628			—			3,628
	Total derivative contracts		$	13,974,098	$	349,133		$	(77,746	)	$	271,387		$	(24,202	)	$	247,185
	1	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
	When bilateral netting agreements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by counterparty basis.
	Derivative contracts may also require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. As of December 31, 2013, a decrease in credit rating to below investment grade would increase our obligation to post cash margin on existing contracts by approximately $26 million.
	The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at December 31, 2012 (in thousands):
			Assets
			Notional1		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	12,850,805	$	46,113		$	(15,656	)	$	30,457		$	—		$	30,457
	Interest rate swaps		1,319,827		72,201			—			72,201			—			72,201
	Energy contracts		1,346,780		82,349			(44,485		)	37,864			(3,464		)	34,400
	Agricultural contracts		212,434		3,638			(3,164		)	474			—			474
	Foreign exchange contracts		180,318		180,318			—			180,318			—			180,318
	Equity option contracts		211,941		12,593			—			12,593			—			12,593
	Total customer risk management programs		16,122,105		397,212			(63,305		)	333,907			(3,464		)	330,443
	Interest rate risk management programs		66,000		7,663			—			7,663			—			7,663
	Total derivative contracts		$	16,188,105	$	404,875		$	(63,305	)	$	341,570		$	(3,464	)	$	338,106
			Liabilities
			Notional¹		Gross Fair Value			Netting Adjustments			Net Fair Value Before Cash Collateral			Cash Collateral			Fair Value Net of Cash Collateral
	Customer risk management programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	13,239,078	$	43,064		$	(15,656	)	$	27,408		$	(15,467	)	$	11,941
	Interest rate swaps		1,319,827		72,724			—			72,724			(31,945		)	40,779
	Energy contracts		1,334,349		83,654			(44,485		)	39,169			(1,769		)	37,400
	Agricultural contracts		212,135		3,571			(3,164		)	407			(188		)	219
	Foreign exchange contracts		179,852		179,852			—			179,852			—			179,852
	Equity option contracts		211,941		12,593			—			12,593			—			12,593
	Total customer risk management programs		16,497,182		395,458			(63,305		)	332,153			(49,369		)	282,784
	Interest rate risk management programs		50,000		805			—			805			—			805
	Total derivative contracts		$	16,547,182	$	396,263		$	(63,305	)	$	332,958		$	(49,369	)	$	283,589
	1	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
Derivative Instruments, Gain (Loss) in Statement of Earnings [Table Text Block]	'
	The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the Consolidated Statement of Earnings (in thousands):
			Year Ended
			December 31, 2013					December 31, 2012						December 31, 2011
			Brokerage		Gain (Loss)			Brokerage			Gain (Loss)			Brokerage			Gain (Loss)
			and Trading Revenue		on Derivatives, Net			and Trading			on Derivatives,			and Trading			on Derivatives,
								Revenue			Net			Revenue			Net
	Customer Risk Management Programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	42	$	—		$	1,070		$	—		$	(4,047	)	$	—
	Interest rate swaps		2,991		—			3,458			—			3,193			—
	Energy contracts		8,303		—			8,171			—			5,262			—
	Agricultural contracts		357		—			382			—			341			—
	Foreign exchange contracts		687		—			612			—			565			—
	Equity option contracts		—		—			—			—			—			—
	Total Customer Risk Management Programs		12,380		—			13,693			—			5,314			—
	Interest Rate Risk Management Programs		—		(4,367		)	—			(301		)	—			2,526
	Total Derivative Contracts		$	12,380	$	(4,367	)	$	13,693		$	(301	)	$	5,314		$	2,526

Loans_and_Allowances_for_Credi1

Loans and Allowances for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2013
Loans Receivable, Net [Abstract]	'
Schedule of the Loans by Portfolio Segment [Table Text Block]	'
	The portfolio segments of the loan portfolio are as follows (in thousands):
			December 31, 2013																December 31, 2012
			Fixed				Variable				Non-accrual				Total				Fixed				Variable				Non-accrual			Total
			Rate				Rate												Rate				Rate
	Commercial		$	1,637,620			$	6,288,841			$	16,760			$	7,943,221			$	2,955,779			$	4,661,666			$	24,467		$	7,641,912
	Commercial real estate		770,908				1,603,595				40,850				2,415,353				779,114				1,389,259				60,626			2,228,999
	Residential mortgage		1,783,615				226,092				42,319				2,052,026				1,747,038				251,394				46,608			2,045,040
	Consumer		135,494				244,950				1,220				381,664				175,412				217,384				2,709			395,505
	Total		$	4,327,637			$	8,363,478			$	101,149			$	12,792,264			$	5,657,343			$	6,519,703			$	134,410		$	12,311,456
	Accruing loans past due (90 days)1														$	1,415														$	3,925
	Foregone interest on nonaccrual loans														$	5,361														$	8,587
	1	Excludes residential mortgage loans guaranteed by agencies of the U.S. government
Rollforward of Allowance For Loan Losses And Accrual for Off-Balnace Sheet Credit Losses [Table Text Block]	'
	The activity in the allowance for loan losses and the accrual for off-balance sheet credit risk related to loan commitments and standby letters of credit for the year ended December 31, 2013 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific allowance				Total
	Allowance for loan losses:
	Beginning balance		$	65,280			$	54,884			$	41,703			$	9,453			$	44,187			$	215,507
	Provision for loan losses		12,747				(16,886		)		(8,043		)		83				(15,974		)		(28,073		)
	Loans charged off		(6,335		)		(5,845		)		(5,753		)		(7,349		)		—				(25,282		)
	Recoveries		7,488				9,420				1,558				4,778				—				23,244
	Ending balance		$	79,180			$	41,573			$	29,465			$	6,965			$	28,213			$	185,396
	Accrual for off-balance sheet credit risk:
	Beginning balance		$	475			$	1,353			$	78			$	9			$	—			$	1,915
	Provision for off-balance sheet credit risk		(356		)		523				12				(6		)		—				173
	Ending balance		$	119			$	1,876			$	90			$	3			$	—			$	2,088
	Total provision for credit losses		$	12,391			$	(16,363	)		$	(8,031	)		$	77			$	(15,974	)		$	(27,900	)
	The activity in the allowance for loan losses and the accrual for off-balance sheet credit risk related to loan commitments and standby letters of credit for the year ended December 31, 2012 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific allowance				Total
	Allowance for loan losses:
	Beginning balance		$	83,443			$	67,034			$	46,476			$	10,178			$	46,350			$	253,481
	Provision for loan losses		(14,950		)		(6,214		)		3,346				5,327				(2,163		)		(14,654		)
	Loans charged off		(9,341		)		(11,642		)		(10,047		)		(11,108		)		—				(42,138		)
	Recoveries		6,128			1	5,706				1,928				5,056				—				18,818
	Ending balance		$	65,280			$	54,884			$	41,703			$	9,453			$	44,187			$	215,507
	Accrual for off-balance sheet credit risk:
	Beginning balance		$	7,906			$	1,250			$	91			$	14			$	—			$	9,261
	Provision for off-balance sheet credit risk		(7,431		)		103				(13		)		(5		)		—				(7,346		)
	Ending balance		$	475			$	1,353			$	78			$	9			$	—			$	1,915
	Total provision for credit losses		$	(22,381	)		$	(6,111	)		$	3,333			$	5,322			$	(2,163	)		$	(22,000	)
	1	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa invalidated by the Oklahoma Supreme Court.
	The activity in the allowance for loan losses and the accrual for off-balance sheet credit risk related to loan commitments and standby letters of credit for the year ended December 31, 2011 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific allowance				Total
	Allowance for loan losses:
	Beginning balance		$	104,631			$	98,709			$	50,281			$	12,614			$	26,736			$	292,971
	Provision for loan losses		(13,830		)		(18,482		)		7,968				3,690				19,614				(1,040		)
	Loans charged off		(14,836		)		(15,973		)		(14,107		)		(11,884		)		—				(56,800		)
	Recoveries		7,478				2,780				2,334				5,758				—				18,350
	Ending balance		$	83,443			$	67,034			$	46,476			$	10,178			$	46,350			$	253,481
	Accrual for off-balance sheet credit risk:
	Beginning balance		$	13,456			$	443			$	131			$	241			$	—			$	14,271
	Provision for off-balance sheet credit risk		(5,550		)		807				(40		)		(227		)		—				(5,010		)
	Ending balance		$	7,906			$	1,250			$	91			$	14			$	—			$	9,261
	Total provision for credit losses		$	(19,380	)		$	(17,675	)		$	7,928			$	3,463			$	19,614			$	(6,050	)
Schedule of Allowance for Loan Losses and Recorded Investment by Impairment Methodology [Table Text Block]	'
	The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at December 31, 2013 is as follows (in thousands):
			Collectively Measured								Individually Measured								Total
			for Impairment								for Impairment
			Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																							Allowance
	Commercial		$	7,926,461			$	78,607			$	16,760			$	573			$	7,943,221			$	79,180
	Commercial real estate		2,374,503				41,440				40,850				133				2,415,353				41,573
	Residential mortgage		2,010,483				29,217				41,543				248				2,052,026				29,465
	Consumer		380,445				6,965				1,219				—				381,664				6,965
	Total		12,691,892				156,229				100,372				954				12,792,264				157,183
	Nonspecific allowance		—				—				—				—				—				28,213
	Total		$	12,691,892			$	156,229			$	100,372			$	954			$	12,792,264			$	185,396
	The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at December 31, 2012 is as follows (in thousands):
			Collectively Measured								Individually Measured								Total
			for Impairment								for Impairment
			Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																							Allowance
	Commercial		$	7,617,445			$	65,050			$	24,467			$	230			$	7,641,912			$	65,280
	Commercial real estate		2,168,373				51,775				60,626				3,109				2,228,999				54,884
	Residential mortgage		1,998,432				40,934				46,608				769				2,045,040				41,703
	Consumer		392,796				9,328				2,709				125				395,505				9,453
	Total		12,177,046				167,087				134,410				4,233				12,311,456				171,320
	Nonspecific allowance		—				—				—				—				—				44,187
	Total		$	12,177,046			$	167,087			$	134,410			$	4,233			$	12,311,456			$	215,507
Schedule of Allowance for Loan Losses and Recorded Investment by Portfolio Segment for Risk Graded and Non-Risk Graded Loans [Table Text Block]	'
	The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at December 31, 2013 is as follows (in thousands):
			Internally Risk Graded								Non-Graded								Total
			Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																							Allowance
	Commercial		$	7,888,219			$	78,250			$	55,002			$	930			$	7,943,221			$	79,180
	Commercial real estate		2,415,353				41,573				—				—				2,415,353				41,573
	Residential mortgage		220,635				5,481				1,831,391				23,984				2,052,026				29,465
	Consumer		265,533				2,657				116,131				4,308				381,664				6,965
	Total		10,789,740				127,961				2,002,524				29,222				12,792,264				157,183
	Nonspecific allowance		—				—				—				—				—				28,213
	Total		$	10,789,740			$	127,961			$	2,002,524			$	29,222			$	12,792,264			$	185,396
	The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at December 31, 2012 is as follows (in thousands):
			Internally Risk Graded								Non-Graded								Total
			Recorded Investment				Related Allowance				Recorded Investment				Related Allowance				Recorded Investment				Related
																							Allowance
	Commercial		$	7,624,442			$	64,181			$	17,470			$	1,099			$	7,641,912			$	65,280
	Commercial real estate		2,228,999				54,884				—				—				2,228,999				54,884
	Residential mortgage		265,503				5,270				1,779,537				36,433				2,045,040				41,703
	Consumer		231,376				2,987				164,129				6,466				395,505				9,453
	Total		10,350,320				127,322				1,961,136				43,998				12,311,456				171,320
	Nonspecific allowance		—				—				—				—				—				44,187
	Total		$	10,350,320			$	127,322			$	1,961,136			$	43,998			$	12,311,456			$	215,507
Schedule of Credit Quality Indicators [Table Text Block]	'
	The following table summarizes the Company’s loan portfolio at December 31, 2013 by the risk grade categories (in thousands):
			Internally Risk Graded												Non-Graded
			Performing				Potential Problem				Nonaccruing				Performing				Nonaccruing				Total
	Commercial:
	Energy		$	2,347,519			$	2,381			$	1,860			$	—			$	—			$	2,351,760
	Services		2,265,984				11,304				4,922				—				—				2,282,210
	Wholesale/retail		1,191,791				2,604				6,969				—				—				1,201,364
	Manufacturing		381,794				9,365				592				—				—				391,751
	Healthcare		1,272,626				34				1,586				—				—				1,274,246
	Integrated food services		145,758				4,736				—				—				—				150,494
	Other commercial and industrial		235,636				—				758				54,929				73				291,396
	Total commercial		7,841,108				30,424				16,687				54,929				73				7,943,221
	Commercial real estate:
	Residential construction and land development		173,488				15,393				17,377				—				—				206,258
	Retail		579,506				1,684				4,857				—				—				586,047
	Office		403,951				1,157				6,391				—				—				411,499
	Multifamily		562,800				13,695				7				—				—				576,502
	Industrial		243,625				—				252				—				—				243,877
	Other commercial real estate		371,628				7,576				11,966				—				—				391,170
	Total commercial real estate		2,334,998				39,505				40,850				—				—				2,415,353
	Residential mortgage:
	Permanent mortgage		210,142				3,283				7,210				815,040				27,069				1,062,744
	Permanent mortgages guaranteed by U.S. government agencies		—				—				—				180,821				777				181,598
	Home equity		—				—				—				800,420				7,264				807,684
	Total residential mortgage		210,142				3,283				7,210				1,796,281				35,110				2,052,026
	Consumer:
	Indirect automobile		—				—				—				5,796				717				6,513
	Other consumer		264,536				795				202				109,318				300				375,151
	Total consumer		264,536				795				202				115,114				1,017				381,664
	Total		$	10,650,784			$	74,007			$	64,949			$	1,966,324			$	36,200			$	12,792,264
	The following table summarizes the Company’s loan portfolio at December 31, 2012 by the risk grade categories (in thousands):
			Internally Risk Graded												Non-Graded
			Performing				Potential Problem				Nonaccruing				Performing				Nonaccruing				Total
	Commercial:
	Energy		$	2,448,954			$	9,245			$	2,460			$	—			$	—			$	2,460,659
	Services		2,119,734				32,362				12,090				—				—				2,164,186
	Wholesale/retail		1,093,413				9,949				3,077				—				—				1,106,439
	Manufacturing		337,132				9,345				2,007				—				—				348,484
	Healthcare		1,077,773				467				3,166				—				—				1,081,406
	Integrated food services		190,422				—				684				—				—				191,106
	Other commercial and industrial		266,329				4,914				919				17,406				64				289,632
	Total commercial		7,533,757				66,282				24,403				17,406				64				7,641,912
	Commercial real estate:
	Residential construction and land development		204,010				22,952				26,131				—				—				253,093
	Retail		508,342				6,327				8,117				—				—				522,786
	Office		405,763				15,280				6,829				—				—				427,872
	Multifamily		393,566				6,624				2,706				—				—				402,896
	Industrial		241,761				265				3,968				—				—				245,994
	Other commercial real estate		351,663				11,820				12,875				—				—				376,358
	Total commercial real estate		2,105,105				63,268				60,626				—				—				2,228,999
	Residential mortgage:
	Permanent mortgage		242,823				10,271				12,409				831,008				27,454				1,123,965
	Permanent mortgages guaranteed by U.S. government agencies		—				—				—				159,955				489				160,444
	Home equity		—				—				—				754,375				6,256				760,631
	Total residential mortgage		242,823				10,271				12,409				1,745,338				34,199				2,045,040
	Consumer:
	Indirect automobile		—				—				—				33,157				1,578				34,735
	Other consumer		229,570				1,091				715				128,978				416				360,770
	Total consumer		229,570				1,091				715				162,135				1,994				395,505
	Total		$	10,111,255			$	140,912			$	98,153			$	1,924,879			$	36,257			$	12,311,456
Summary of Impaired Loans [Table Text Block]	'
		As of December 31, 2013																				For the Year Ended
						Recorded Investment																December 31, 2013
		Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized
		Principal								Allowance												Investment
		Balance
	Commercial:
	Energy	$	1,860			$	1,860			$	1,860			$	—			$	—			$	2,160			$	—
	Services	6,486				4,922				3,791				1,131				516				8,506				—
	Wholesale/retail	11,009				6,969				6,937				32				9				5,023				—
	Manufacturing	746				592				592				—				—				1,300				—
	Healthcare	2,193				1,586				1,538				48				48				2,376				—
	Integrated food services	—				—				—				—				—				342				—
	Other commercial and industrial	8,532				831				831				—				—				907				—
	Total commercial	30,826				16,760				15,549				1,211				573				20,614				—
	Commercial real estate:
	Residential construction and land development	20,804				17,377				17,050				327				107				21,754				—
	Retail	6,133				4,857				4,857				—				—				6,487				—
	Office	7,848				6,391				6,383				8				8				6,610				—
	Multifamily	7				7				7				—				—				1,357				—
	Industrial	252				252				252				—				—				2,110				—
	Other real estate loans	14,593				11,966				11,779				187				18				12,421				—
	Total commercial real estate	49,637				40,850				40,328				522				133				50,739				—
	Residential mortgage:
	Permanent mortgage	41,870				34,279				33,869				410				248				37,071				1,582
	Permanent mortgage guaranteed by U.S. government agencies1	188,436				181,598				181,598				—				—				165,509				6,961
	Home equity	7,537				7,264				7,264				—				—				6,760				—
	Total residential mortgage	237,843				223,141				222,731				410				248				209,340				8,543
	Consumer:
	Indirect automobile	719				717				717				—				—				1,148				—
	Other consumer	509				502				502				—				—				817				—
	Total consumer	1,228				1,219				1,219				—				—				1,965				—
	Total	$	319,534			$	281,970			$	279,827			$	2,143			$	954			$	282,658			$	8,543
	1	All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2013, $777 thousand of these loans are nonaccruing and $181 million are accruing based on the guarantee by U.S. government agencies.
	Generally, no interest income is recognized on impaired loans until all principal balances, including amounts charged-off, have been recovered.
		As of December 31, 2012																					For the Year Ended
							Recorded Investment																December 31, 2012
			Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized
			Principal								Allowance												Investment
			Balance
	Commercial:
	Energy		$	2,460			$	2,460			$	2,460			$	—			$	—			$	1,398			$	—
	Services		15,715				12,090				11,940				150				149				14,529				—
	Wholesale/retail		9,186				3,077				3,016				61				15				12,129				—
	Manufacturing		2,447				2,007				2,007				—				—				12,529				—
	Healthcare		4,256				3,166				2,050				1,116				66				4,326				—
	Integrated food services		684				684				684				—				—				342				—
	Other commercial and industrial		8,482				983				983				—				—				1,387				—
	Total commercial		43,230				24,467				23,140				1,327				230				46,640				—
	Commercial real estate:
	Residential construction and land development		44,721				26,131				25,575				556				155				44,003				—
	Retail		9,797				8,117				8,117				—				—				7,490				—
	Office		8,949				6,829				6,604				225				21				9,143				—
	Multifamily		3,189				2,706				2,706				—				—				3,110				—
	Industrial		3,968				3,968				—				3,968				2,290				1,984				—
	Other real estate loans		15,377				12,875				10,049				2,826				643				14,181				—
	Total commercial real estate		86,001				60,626				53,051				7,575				3,109				79,911				—
	Residential mortgage:
	Permanent mortgage		51,153				39,863				37,564				2,299				769				32,614				1,590
	Permanent mortgage guaranteed by U.S. government agencies1		170,740				160,444				160,444				—				—				173,729				6,718
	Home equity		6,256				6,256				6,256				—				—				5,329				—
	Total residential mortgage		228,149				206,563				204,264				2,299				769				211,672				8,308
	Consumer:
	Indirect automobile		1,578				1,578				1,578				—				—				1,886				—
Other consumer		1,300				1,131				1,006				125				125				1,226				—
Total consumer		2,878				2,709				2,584				125				125				3,112				—
Total		$	360,258			$	294,365			$	283,039			$	11,326			$	4,233			$	341,335			$	8,308
1	All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2012, $489 thousand of these loans are nonaccruing and $160 million are accruing based on the guarantee by U.S. government agencies.
Troubled Debt Restructurings [Table Text Block]	'
	A summary of troubled debt restructurings ("TDRs") by accruing status as of December 31, 2013 were as follows (in thousands):
			As of December 31, 2013
			Recorded				Performing in Accordance With Modified Terms				Not				Specific				Amounts Charged-Off During the Year Ended December 31, 2013
			Investment								Performing in Accordance With Modified Terms				Allowance
	Nonaccruing TDRs:
	Commercial:
	Energy		$	—			$	—			$	—			$	—			$	—
	Services		2,235				852				1,383				237				—
	Wholesale/retail		235				89				146				9				—
	Manufacturing		391				—				391				—				154
	Healthcare		—				—				—				—				—
	Integrated food services		—				—				—				—				—
	Other commercial and industrial		771				173				598				—				—
	Total commercial		3,632				1,114				2,518				246				154
	Commercial real estate:
	Residential construction and land development		10,148				1,444				8,704				107				46
	Retail		4,359				3,141				1,218				—				582
	Office		5,059				3,872				1,187				—				117
	Multifamily		—				—				—				—				—
	Industrial		—				—				—				—				—
	Other real estate loans		5,011				2,885				2,126				—				—
	Total commercial real estate		24,577				11,342				13,235				107				745
	Residential mortgage:
	Permanent mortgage		18,697				12,214				6,483				88				469
	Home equity		4,045				3,531				514				—				112
	Total residential mortgage		22,742				15,745				6,997				88				581
	Consumer:
	Indirect automobile		629				555				74				—				1
	Other consumer		379				203				176				—				—
	Total consumer		1,008				758				250				—				1
	Total nonaccruing TDRs		$	51,959			$	28,959			$	23,000			$	441			$	1,481
	Accruing TDRs:
	Residential mortgage:
	Permanent mortgage		—				—				—				—				—
	Permanent mortgages guaranteed by U.S. government agencies		54,322				13,384				40,938				—				—
	Total residential mortgage		54,322				13,384				40,938				—				—
	Total accruing TDRs		54,322				13,384				40,938				—				—
	Total TDRs		$	106,281			$	42,343			$	63,938			$	441			$	1,481
	A summary of troubled debt restructurings by accruing status as of December 31, 2012 were as follows (in thousands):
			As of December 31, 2012
			Recorded				Performing in Accordance With Modified Terms				Not				Specific				Amounts Charged-off During the Year Ended December 31, 2012
			Investment								Performing in Accordance With Modified Terms				Allowance
	Nonaccruing TDRs:
	Commercial:
	Energy		$	—			$	—			$	—			$	—			$	—
	Services		2,492				2,099				393				45				—
	Wholesale/retail		2,290				1,362				928				15				107
	Manufacturing		—				—				—				—				—
	Healthcare		64				64				—				—				—
	Integrated food services		—				—				—				—				—
	Other commercial and industrial		675				—				675				—				—
	Total commercial		5,521				3,525				1,996				60				107
	Commercial real estate:
	Residential construction and land development		14,898				9,989				4,909				76				1,143
	Retail		6,785				5,735				1,050				—				150
	Office		3,899				1,920				1,979				—				269
	Multifamily		—				—				—				—				—
	Industrial		—				—				—				—				—
	Other real estate loans		5,017				3,399				1,618				—				2,182
	Total commercial real estate		30,599				21,043				9,556				76				3,744
	Residential mortgage:
	Permanent mortgage		20,490				12,214				8,276				54				1,476
	Home equity		—				—				—				—				—
Total residential mortgage		20,490				12,214				8,276				54				1,476
Consumer:
Indirect automobile		—				—				—				—				—
Other consumer		2,860				2,589				271				83				198
Total consumer		2,860				2,589				271				83				198
Total nonaccuring TDRs		$	59,470			$	39,371			$	20,099			$	273			$	5,525
Accruing TDRs:
Residential mortgage:
Permanent mortgage		—				—				—				—				—
Permanent mortgages guaranteed by U.S. government agencies		38,515				8,755				29,760				—				—
Total residential mortgage		38,515				8,755				29,760				—				—
Total accruing TDRs		38,515				8,755				29,760				—				—
Total TDRs		$	97,985			$	48,126			$	49,859			$	273			$	5,525
Troubled debt restructurings generally consist of interest rates concessions, payment stream concessions or a combination of concessions to distressed borrowers. The following table details the recorded balance of loans at December 31, 2013 by class that were restructured during the year ended December 31, 2013 by primary type of concession (in thousands):
	Year Ended December 31, 2013
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				—				1,080				—				1,080			1,080
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				391				—				391			391
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				139				—				57				196			196
Total commercial	—				—				—				139				1,471				57				1,667			1,667
Commercial real estate:
Residential construction and land development	—				—				—				—				—				—				—			—
Retail	—				—				—				—				486				—				486			486
Office	—				—				—				—				2,819				—				2,819			2,819
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				517				—				517			517
Total commercial real estate	—				—				—				—				3,822				—				3,822			3,822
Residential mortgage:
Permanent mortgage	—				—				—				—				1,062				1,894				2,956			2,956
Permanent mortgage guaranteed by U.S. government agencies	11,545				12,518				24,063				—				—				—				—			24,063
Home equity	—				—				—				—				—				2,800				2,800			2,800
Total residential mortgage	11,545				12,518				24,063				—				1,062				4,694				5,756			29,819
Consumer:
Indirect automobile	—				—				—				—				—				510				510			510
Other consumer	—				—				—				75				—				128				203			203
Total consumer	—				—				—				75				—				638				713			713
Total	$	11,545			$	12,518			$	24,063			$	214			$	6,355			$	5,389			$	11,958		$	36,021
The following table details the recorded balance of loans by class that were restructured during the year ended December 31, 2012 by primary type of concession (in thousands):
	Year Ended December 31, 2012
	Accruing				Nonaccrual																Total
	Combination & Other				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				875				—				—				875				875
Wholesale/retail	—				885				—				—				885				885
Manufacturing	—				—				—				—				—				—
Healthcare	—				—				—				64				64				64
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				—				—				—				—				—
Total commercial	—				1,760				—				64				1,824				1,824
Commercial real estate:
Residential construction and land development	—				1,219				8,359				—				9,578				9,578
Retail	—				2,379				—				—				2,379				2,379
Office	—				1,350				570				—				1,920				1,920
Multifamily	—				—				—				—				—				—
Industrial	—				—				—				—				—				—
Other real estate loans	—				—				1,573				—				1,573				1,573
Total commercial real estate	—				4,948				10,502				—				15,450				15,450
Residential mortgage:
Permanent mortgage	—				1,214				—				2,518				3,732				3,732
Permanent mortgage guaranteed by U.S. government agencies	17,398				—				—				—				—				17,398
Home equity	—				—				—				—				—				—
Total residential mortgage	17,398				1,214				—				2,518				3,732				21,130
Consumer:
Indirect automobile	—				—				—				—				—				—
Other consumer	—				223				—				2,508				2,731				2,731
Total consumer	—				223				—				2,508				2,731				2,731
Total	$	17,398			$	8,145			$	10,502			$	5,090			$	23,737			$	41,135
The following table summarizes, by loan class, the recorded investment at December 31, 2013 and 2012, respectively of loans modified as TDRs within the previous 12 months and for which there was a payment default during the years ended December 31, 2013 and 2012, respectively (in thousands):
	Year Ended
	31-Dec-13												31-Dec-12
	Accruing				Nonaccrual				Total				Accruing				Nonaccrual				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				1,080				1,080				—				875				875
Wholesale/retail	—				—				—				—				885				885
Manufacturing	—				391				391				—				—				—
Healthcare	—				—				—				—				—				—
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				164				164				—				—				—
Total commercial	—				1,635				1,635				—				1,760				1,760
Commercial real estate:
Residential construction and land development	—				—				—				—				2,000				2,000
Retail	—				486				486				—				2,379				2,379
Office	—				2,819				2,819				—				1,350				1,350
Multifamily	—				—				—				—				—				—
Industrial	—				—				—				—				—				—
Other real estate loans	—				517				517				—				—				—
Total commercial real estate	—				3,822				3,822				—				5,729				5,729
Residential mortgage:
Permanent mortgage	—				586				586				—				2,692				2,692
Permanent mortgage guaranteed by U.S. government agencies	23,918				—				23,918				17,251				—				17,251
Home equity	—				590				590				—				—				—
Total residential mortgage	23,918				1,176				25,094				17,251				2,692				19,943
Consumer:
Indirect automobile	—				115				115				—				—				—
Other consumer	—				40				40				—				462				462
Total consumer	—				155				155				—				462				462
Total	$	23,918			$	6,788			$	30,706			$	17,251			$	10,643			$	27,894
A payment default is defined as being 30 days or more past due. The table above includes loans that experienced a payment default during the period, but may be performing in accordance with the modified terms as of the balance sheet date.
Summary of Loans by Aging Status [Table Text Block]	'
	A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of December 31, 2013 is as follows (in thousands):
							Past Due
			Current				30 to 89				90 Days				Nonaccrual				Total
							Days				or More
	Commercial:
	Energy		$	2,347,267			$	2,483			$	150			$	1,860			$	2,351,760
	Services		2,276,036				1,210				42				4,922				2,282,210
	Wholesale/retail		1,193,905				338				152				6,969				1,201,364
	Manufacturing		391,159				—				—				592				391,751
	Healthcare		1,272,660				—				—				1,586				1,274,246
	Integrated food services		150,494				—				—				—				150,494
	Other commercial and industrial		290,479				81				5				831				291,396
	Total commercial		7,922,000				4,112				349				16,760				7,943,221
	Commercial real estate:
	Residential construction and land development		188,434				428				19				17,377				206,258
	Retail		580,926				264				—				4,857				586,047
	Office		404,505				603				—				6,391				411,499
	Multifamily		576,495				—				—				7				576,502
	Industrial		243,625				—				—				252				243,877
	Other real estate loans		376,699				1,493				1,012				11,966				391,170
	Total commercial real estate		2,370,684				2,788				1,031				40,850				2,415,353
	Residential mortgage:
	Permanent mortgage		1,018,670				9,795				—				34,279				1,062,744
	Permanent mortgages guaranteed by U.S. government agencies		21,916				17,290				141,615				777				181,598
	Home equity		797,299				3,087				34				7,264				807,684
	Total residential mortgage		1,837,885				30,172				141,649				42,320				2,052,026
	Consumer:
	Indirect automobile		5,466				330				—				717				6,513
	Other consumer		373,951				697				1				502				375,151
	Total consumer		379,417				1,027				1				1,219				381,664
	Total		$	12,509,986			$	38,099			$	143,030			$	101,149			$	12,792,264
	A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of December 31, 2012 is as follows (in thousands):
							Past Due
			Current				30 to 89				90 Days				Nonaccrual				Total
							Days				or More
	Commercial:
	Energy		$	2,454,928			$	3,071			$	200			$	2,460			$	2,460,659
	Services		2,150,386				1,710				—				12,090				2,164,186
	Wholesale/retail		1,103,307				5				50				3,077				1,106,439
	Manufacturing		346,442				35				—				2,007				348,484
	Healthcare		1,077,022				1,040				178				3,166				1,081,406
	Integrated food services		190,416				6				—				684				191,106
	Other commercial and industrial		288,522				127				—				983				289,632
	Total commercial		7,611,023				5,994				428				24,467				7,641,912
	Commercial real estate:
	Residential construction and land development		226,962				—				—				26,131				253,093
	Retail		514,252				349				68				8,117				522,786
	Office		417,866				3,177				—				6,829				427,872
	Multifamily		400,151				39				—				2,706				402,896
	Industrial		242,026				—				—				3,968				245,994
	Other real estate loans		358,030				2,092				3,361				12,875				376,358
	Total commercial real estate		2,159,287				5,657				3,429				60,626				2,228,999
	Residential mortgage:
	Permanent mortgage		1,075,687				8,366				49				39,863				1,123,965
	Permanent mortgages guaranteed by U.S. government agencies		26,560				13,046				120,349				489				160,444
	Home equity		752,100				2,275				—				6,256				760,631
	Total residential mortgage		1,854,347				23,687				120,398				46,608				2,045,040
	Consumer:
	Indirect automobile		31,869				1,273				15				1,578				34,735
	Other consumer		358,308				1,327				4				1,131				360,770
	Total consumer		390,177				2,600				19				2,709				395,505
	Total		$	12,014,834			$	37,938			$	124,274			$	134,410			$	12,311,456

Premises_and_Equipment_Premise

Premises and Equipment Premises and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Abstract]	'
Premises and Equipment [Table Text Block]	'
	Premises and equipment at December 31 are summarized as follows (in thousands):
		December 31,
		2013		2012
	Land	$	75,859	$	73,616
	Buildings and improvements	221,326		214,116
	Software	103,473		89,183
	Furniture and equipment	163,013		158,020
	Construction in progress	31,027		30,408
	Subtotal	594,698		565,343
	Less accumulated depreciation	316,849		299,423
	Total	$	277,849	$	265,920

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Finite-Lived Intangible Assets [Table Text Block]	'
	The following table presents the original cost and accumulated amortization of intangible assets (in thousands):
		December 31,
		2013			2012
	Core deposit premiums	$	33,749		$	33,749
	Less accumulated amortization	32,656			32,180
	Net core deposit premiums	1,093			1,569
	Other identifiable intangible assets	37,992			38,191
	Less accumulated amortization	14,521			11,568
	Net other identifiable intangible assets	23,471			26,623
	Total intangible assets, net	$	24,564		$	28,192
	The net amortized cost of identifiable intangible assets assigned to the Company’s geographic markets as follows (in thousands):
		December 31,
		2013			2012
	Core deposit premiums:
	Texas	$	816		$	1,192
	Colorado	277			377
	Arizona	—			—
	Total core deposit premiums	$	1,093		$	1,569
	Other identifiable intangible assets:
	Oklahoma	9,199			9,857
	Colorado	13,482			15,976
	Kansas/Missouri	790			790
	Total other identifiable intangible assets	23,471			26,623
	Total intangible assets, net	$	24,564		$	28,192
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	'
	Expected amortization expense for intangible assets that will continue to be amortized (in thousands):
		Core			Other			Total
		Deposit			Identifiable
		Premiums			Intangible Assets
	2014	$	432		$	2,290		$	2,722
	2015	393			2,290			2,683
	2016	247			2,290			2,537
	2017	21			2,059			2,080
	2018	—			1,595			1,595
	Thereafter	—			12,947			12,947
		$	1,093		$	23,471		$	24,564
Schedule of Goodwill [Table Text Block]	'
	Goodwill assigned to the Company’s geographic markets as follows (in thousands):
		December 31,
		2013			2012
	Goodwill:
	Oklahoma	$	10,387		$	12,607
	Texas	240,122			240,122
	New Mexico	15,273			15,273
	Colorado	77,555			77,555
	Arizona	16,422			16,422
	Total goodwill	$	359,759		$	361,979
	The changes in the carrying value of goodwill by operating segment for year ended December 31, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth		Total
								Management
	Balance, December 31, 2011
	Goodwill	$	266,728		$	39,251		$	29,850	$	335,829
	Accumulated impairment losses	—			(228		)	—		(228		)
		266,728			39,023			29,850		335,601
	Goodwill acquired during 2012	4,434			—			21,944		26,378
	Balance, December 31, 2012
	Goodwill	271,162			39,251			51,794		362,207
	Accumulated impairment losses	—			(228		)	—		(228		)
		271,162			39,023			51,794		361,979
	Goodwill adjustments during 2013	(2,220		)	—			—		(2,220		)
	Balance, December 31, 2013
	Goodwill	268,942			39,251			51,794		359,987
	Accumulated Impairment	—			(228		)	—		(228		)
		$	268,942		$	39,023		$	51,794	$	359,759

Mortgage_Banking_Activities_Ta

Mortgage Banking Activities (Tables)	12 Months Ended
	Dec. 31, 2013
Mortgage Banking [Abstract]	'
Components of Residential Mortgage Loans Held For Sale	'
	The unpaid principal balance of residential mortgage loans held for sale, notional amounts of derivative contracts related to residential mortgage loans commitments and forward contract sales and their related fair values included in Mortgage loans held for sale on the Consolidated Balance Sheets were (in thousands):
			December 31, 2013								December 31, 2012
			Unpaid Principal Balance/				Fair Value				Unpaid Principal Balance/			Fair Value
			Notional								Notional
	Residential mortgage loans held for sale		$	192,266			$	193,584			$	269,718		$	281,935
	Residential mortgage loan commitments		258,873				2,656				356,634			12,733
	Forward sales contracts		435,867				4,306				598,442			(906		)
							$	200,546						$	293,762
Mortgage Banking Revenue [Table Text Block]	'
	Mortgage banking revenue was as follows (in thousands):
			Year Ended
			2013				2012				2011
	Originating and marketing revenue:
	Residential mortgage loans held for sale		$	84,403			$	120,599			$	57,418
	Residential mortgage loan commitments		(10,070		)		6,136				4,345
	Forward sales contracts		5,212				2,382				(9,781		)
	Total originating and marketing revenue		79,545				129,117				51,982
	Servicing revenue		42,389				40,185				39,661
	Total mortgage banking revenue		$	121,934			$	169,302			$	91,643
Summary of Mortgage Servicing Rights	'
			December 31,
			2013				2012				2011
	Number of residential mortgage loans serviced for others		106,137				98,246				95,841
	Outstanding principal balance of residential mortgage loans serviced for others		$	13,718,942			$	11,981,624			$	11,300,986
	Weighted average interest rate		4.4		%		4.71		%		5.19		%
	Remaining term (in months)		292				289				290
Activity in Capitalized Mortgage Servicing Rights	'
	Activity in capitalized mortgage servicing rights during the three years ended December 31, 2013 is as follows (in thousands):
			Purchased				Originated				Total
	Balance, December 31, 2010		$	37,900			$	77,823			$	115,723
	Additions, net		—				26,251				26,251
	Change in fair value due to loan runoff		(4,699		)		(10,045		)		(14,744		)
	Change in fair value due to market changes		(14,298		)		(26,149		)		(40,447		)
	Balance, December 31, 2011		$	18,903			$	67,880			$	86,783
	Additions, net		—				42,191				42,191
	Change in fair value due to loan runoff		(4,164		)		(14,788		)		(18,952		)
	Change in fair value due to market changes		(1,763		)		(7,447		)		(9,210		)
	Balance, December 31, 2012		$	12,976			$	87,836			$	100,812
	Additions, net		—				49,431				49,431
	Change in fair value due to loan runoff		(3,029		)		(16,601		)		(19,630		)
	Change in fair value due to market changes		5,988				16,732				22,720
	Balance, December 31, 2013		$	15,935			$	137,398			$	153,333
Assumptions to Value Mortgage Servicing Rights [Table Text Block]	'
	There is no active market for trading in mortgage servicing rights after origination. Fair value is determined by discounting the projected net cash flows. Significant assumptions used to determine fair value considered to be significant unobservable inputs were as follows:
			December 31,
			2013		2012
	Discount rate – risk-free rate plus a market premium		10.21%		10.29%
	Prepayment rate – based upon loan interest rate, original term and loan type		6.66% - 26.19%		8.38% - 43.94%
	Loan servicing costs – annually per loan based upon loan type:
	Performing loans		$60 - $105		$55 - $105
	Delinquent loans		$150 - $500		$135 - $500
	Loans in foreclosure		$1,000 - $4,250		$875 - $4,250
	Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life		1.80%		0.87%
Stratification of Loan Servicing Portfolio	'
	Stratification of the residential mortgage loan servicing portfolio and outstanding principal of loans serviced for others by interest rate at December 31, 2013 follows (in thousands):
			< 4.00%				4.00% - 4.99%				5.00% - 5.99%			> 5.99%			Total
	Fair value		$	62,962			$	55,721			$	27,446		$	7,204		$	153,333
	Outstanding principal of loans serviced for others		$	5,454,084			$	4,711,703			$	2,350,924		$	1,202,231		$	13,718,942
	Weighted average prepayment rate1		6.66		%		7.85		%		9.93		%	26.19		%	9.34		%
	1	Annual prepayment estimates based upon loan interest rate, original term and loan type. Weighted average prepayment rate is determined by weighting the prepayment speed for each loan by its unpaid principal balance.
Aging Status of Mortgage Loans Serviced For Others	'
	The aging status of our mortgage loans serviced for others by investor at December 31, 2013 follows (in thousands):
							Past Due
			Current				30 to 59				60 to 89			90 Days or More			Total
							Days				Days
	FHLMC		$	4,557,381			$	42,359			$	10,926		$	36,890		$	4,647,556
	FNMA		4,111,774				26,284				7,828			20,658			4,166,544
	GNMA		4,475,016				149,707				43,702			18,113			4,686,538
	Other		211,308				1,871				547			4,578			218,304
	Total		$	13,355,479			$	220,221			$	63,003		$	80,239		$	13,718,942
Activity in Accrual for Losses On Loans Sold With Recourse	'
	The activity in the accrual for losses on loans sold with recourse included in Other liabilities in the Consolidated Balance Sheets is summarized as follows (in thousands):
		Year Ended
		2013				2012				2011
	Beginning balance	$	11,359			$	18,683			$	16,667
	Provision for recourse losses	565				(1,891		)		8,611
	Loans charged off, net	(2,883		)		(5,433		)		(6,595		)
	Ending balance	$	9,041			$	11,359			$	18,683
Residential Mortgage Loans Subject to Repurchase Under Standard Representation and Warranties [Table Text Block]	'
	A summary of unresolved deficiency requests from the agencies and related accrual for credit losses follows (Dollars in thousands):
		December 31,
		2013				2012
	Number of unresolved deficiency requests	578				389
	Aggregate outstanding principal balance subject to unresolved deficiency requests	$	69,288			$	44,831
	Unpaid principal balance subject to indemnification by the Company	3,200				1,233
	Accrual for credit losses related to potential loan repurchases under representations and warranties	8,845				5,291

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Interest Expense on Deposits [Table Text Block]	'
	Interest expense on deposits is summarized as follows (in thousands):
		December 31,
		2013		2012		2011
	Transaction deposits	$	11,155	$	14,300	$	23,415
	Savings	442		540		719
	Time:
	Certificates of deposits under $100,000	16,234		19,150		26,476
	Certificates of deposits $100,000 and over	12,273		16,331		21,175
	Other time deposits	15,460		16,692		17,105
	Total time	43,967		52,173		64,756
	Total	$	55,564	$	67,013	$	88,890

Other_Borrowings_Other_Borrowi

Other Borrowings Other Borrowings (Tables)	12 Months Ended
	Dec. 31, 2013
Debt Disclosure [Abstract]	'
Schedule of Other Borrowings [Table Text Block]	'
	Information relating to other borrowings is summarized as follows (dollars in thousands):
			As of				Year Ended
			December 31, 2013				December 31, 2013
			Balance		Rate		Average Balance			Rate			Maximum
													Outstanding
													At Any
													Month End
	Parent Company and Other Non-Bank Subsidiaries:
	Other		$	—	—	%	$	326		—	%		$	—
	Total Parent Company and Other Non-Bank Subsidiaries		—				326			—
	Subsidiary Bank:
	Funds purchased		868,081		0.04		866,062			0.1			997,536
	Repurchase agreements		813,454		0.05		811,996			0.06			881,033
	Other borrowings:
	Federal Home Loan Bank advances		1,005,650		0.19		1,661,424			0.2			2,451,197
	GNMA repurchase liability		18,113		5.5		15,741			5.43			21,055
	Other		16,590		2.35		16,502			2.54			17,092
	Total other borrowings		1,040,353				1,693,667			0.27
	Subordinated debentures		347,802		5.11		347,717			2.51			347,802
	Total subsidiary bank		3,069,690				3,719,442			0.41
	Total other borrowed funds		$	3,069,690			$	3,719,768		0.4	%
			As of				Year Ended
			December 31, 2012				December 31, 2012
			Balance		Rate		Average Balance			Rate			Maximum
													Outstanding
													At Any
													Month End
	Parent Company and Other Non-Bank Subsidiaries:
	Other		$	10,500	1.5	%	$	394		1.11	%		$	10,500
	Total Parent Company and Other Non-Bank Subsidiaries		10,500				394			1.11
	Subsidiary Bank:
	Funds purchased		1,167,416		0.05		1,512,711			0.14			1,810,793
	Repurchase agreements		887,030		0.07		1,072,650			0.09			1,272,151
	Other borrowings:
	Federal Home Loan Bank advances		604,897		0.23		104,925			0.31			604,897
	GNMA repurchase liability		20,046		5.44		33,768			5.41			47,840
	Other		16,332		5.1		16,577			2.91			16,761
	Total other borrowings		641,275				155,270
	Subordinated debentures		347,633		2.4		363,699			3.79			398,897
	Total subsidiary bank		3,043,354				3,104,330			0.65
	Total other borrowings		$	3,053,854			$	3,104,724		0.65	%
			As of				Year Ended
			December 31, 2011				December 31, 2011
			Balance		Rate		Average Balance			Rate			Maximum
													Outstanding
													At Any
													Month End
	Parent Company and Other Non-Bank Subsidiaries:
	Trust preferred debt		$	—	—	%	$	7,093		6.42	%		$	8,763
	Other		—		—		—			—			—
	Total Parent Company and Other Non-Bank Subsidiaries		—				7,093			6.42
	Subsidiary Banks:
	Funds purchased		1,063,318		0.03		1,046,114			0.07			1,706,893
	Repurchase agreements		1,233,064		0.09		1,096,615			0.12			1,393,237
	Other borrowings:
	Federal Home Loan Bank advances		4,837		0.27		45,110			0.38			201,674
	GNMA repurchase liability		53,082		6.18		56,142			5.79			118,595
	Other		16,566		5.1		28,777			3.23			45,366
	Total other borrowings		74,485				130,029
	Subordinated debentures		398,881		5.47		398,790			5.74			398,881
	Total subsidiary banks		2,769,748				2,671,548			1.06
	Total other borrowings		$	2,769,748			$	2,678,641		1.17	%
Schedule of Maturities of Other Borrowings [Table Text Block]	'
	Aggregate annual principal repayments at December 31, 2013 are as follows (in thousands):
			Parent		Subsidiary
			Company and Other Non-bank Subsidiaries		Bank
	2014		$	—	$	2,705,823
	2015		—		122,032
	2016		—		525
	2017		—		226,820
	2018		—		575
	Thereafter		—		13,915
	Total		$	—	$	3,069,690
Schedule of Repurchase Agreements [Table Text Block]	'
	Additional information relating to securities sold under agreements to repurchase and related liabilities at December 31, 2013 and 2012 is as follows (dollars in thousands):
			December 31, 2013
			Amortized		Market			Repurchase			Average
	Security Sold/Maturity		Cost		Value			Liability1			Rate
	U.S. Agency Securities:
	Overnight1		$	1,085,893	$	1,075,821		$	813,624		0.05	%
	Long-term		—		—			—			—	%
	Total Agency Securities		$	1,085,893	$	1,075,821		$	813,624		0.05	%
			December 31, 2012
			Amortized		Market			Repurchase			Average
	Security Sold/Maturity		Cost		Value			Liability1			Rate
	U.S. Agency Securities:
	Overnight1		$	1,213,593	$	1,242,314		$	877,382		0.07	%
	Long-term		—		—			—			—	%
	Total Agency Securities		$	1,213,593	$	1,242,314		$	877,382		0.07	%
	1	BOK Financial maintains control over the securities underlying overnight repurchase agreements and generally transfers control over securities underlying longer-term dealer repurchase agreements to the respective counterparty.

Federal_and_State_Income_Taxes1

Federal and State Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	'
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of deferred tax assets and liabilities are as follows (in thousands):
		December 31,
		2013				2012
	Deferred tax assets:
	Available for sale securities mark to market	$	14,700			$	—
	Stock-based compensation	8,100				9,100
	Credit loss allowances	75,600				86,100
	Valuation adjustments	35,300				45,100
	Deferred book income	3,500				7,200
	Deferred compensation	60,100				45,100
	Other	29,500				31,300
	Total deferred tax assets	226,800				223,900
	Deferred tax liabilities:
	Available for sale securities mark to market	—				99,000
	Depreciation	17,300				19,600
	Mortgage servicing rights	72,200				59,500
	Lease financing	23,200				21,100
	Other	18,500				21,700
	Total deferred tax liabilities	131,200				220,900
	Deferred tax assets in excess of deferred tax liabilities	$	95,600			$	3,000
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	'
	The significant components of the provision for income taxes attributable to continuing operations for BOK Financial are shown below (in thousands):
		Year Ended December 31,
		2013				2012				2011
	Current income tax expense:
	Federal	$	125,412			$	159,706			$	137,802
	State	14,381				19,103				16,085
	Total current income tax expense	139,793				178,809				153,887
	Deferred income tax expense:
	Federal	15,915				8,664				3,882
	State	1,590				1,267				742
	Total deferred income tax expense	17,505				9,931				4,624
	Total income tax expense	$	157,298			$	188,740			$	158,511
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	'
	The reconciliations of income (loss) attributable to continuing operations at the U.S. federal statutory tax rate to income tax expense are as follows (in thousands):
		Year Ended December 31,
		2013				2012				2011
	Amount:
	Federal statutory tax	$	166,680			$	190,003			$	156,917
	Tax exempt revenue	(7,361		)		(5,558		)		(5,357		)
	Effect of state income taxes, net of federal benefit	10,937				13,684				11,198
	Utilization of tax credits	(8,145		)		(5,126		)		(2,972		)
	Bank-owned life insurance	(3,596		)		(3,850		)		(3,879		)
	Reduction of tax accrual	(1,400		)		(950		)		(1,764		)
	Other, net	183				537				4,368
	Total	$	157,298			$	188,740			$	158,511
	Due to the favorable resolution of certain tax issues for the periods ended December 31, 2009 and 2008, BOK Financial reduced its tax accrual by $1.4 million and $1.0 million in 2013 and 2012, respectively, which was credited against current income tax expense.
		Year Ended December 31,
		2013			2012			2011
	Percent of pretax income:
	Federal statutory tax	35	%		35	%		35	%
	Tax exempt revenue	(1	)		(1	)		(1	)
	Effect of state income taxes, net of federal benefit	2			3			2
	Utilization of tax credits	(2	)		(1	)		(1	)
	Bank-owned life insurance	(1	)		(1	)		(1	)
	Reduction of tax accrual	—			—			—
	Other, net	—			—			1
	Total	33	%		35	%		35	%
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]	'
	A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in thousands):
		2013				2012				2011
	Balance as of January 1	$	12,275			$	12,230			$	11,900
	Additions for tax for current year positions	2,730				3,976				6,390
	Settlements during the period	—				(1,000		)		(2,510		)
	Lapses of applicable statute of limitations	(2,947		)		(2,931		)		(3,550		)
	Balance as of December 31	$	12,058			$	12,275			$	12,230

Employee_Benefits_Tables

Employee Benefits (Tables)	12 Months Ended
	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]	'
Change in benefit obligation, plan assets funded status and net periodic pension cost (benefit) [Table Text Block]	'
	The following table presents information regarding this plan (in thousands):
			December 31,
			2013				2012
	Change in projected benefit obligation:
	Projected benefit obligation at beginning of year		$	48,028			$	50,213
	Interest cost		1,532				1,925
	Actuarial (gain) loss		(1,543		)		2,786
	Benefits paid		(3,252		)		(2,194		)
	Plan amendments		$	—			(4,702		)
	Projected benefit obligation at end of year1,2		$	44,765			$	48,028
	Change in plan assets:
	Plan assets at fair value at beginning of year		$	45,920			$	43,859
	Actual return on plan assets		6,144				4,255
	Benefits paid		(3,252		)		(2,194		)
	Plan assets at fair value at end of year		$	48,812			$	45,920
	Funded status of the plan		$	4,047			$	(2,108	)
	Components of net periodic benefit costs:
	Interest cost		$	1,532			$	1,925
	Expected return on plan assets		(2,185		)		(2,062		)
	Recognized prior service cost		(1,175		)		—
	Amortization of unrecognized net loss		3,830				3,461
	Net periodic pension cost		$	2,002			$	3,324
	1	Projected benefit obligation equals accumulated benefit obligation.
	2	Projected benefit obligation is based on January 1 measurement date.
Valuation assumptions used [Table Text Block]	'
	Weighted-average assumptions as of December 31:		2013			2012
	Discount rate		4.05	%		3.36	%
	Expected return on plan assets		6	%		5.25	%
Expected future benefit payments [Table Text Block]	'
	As of December 31, 2013, expected future benefit payments related to the Pension Plan were as follows (in thousands):
	2014	$	3,886
	2015	3,713
	2016	3,386
	2017	3,351
	2018	3,488
	Thereafter	40,394
		$	58,218

Stock_Compensation_Plans_Table

Stock Compensation Plans (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Share-based Compensation Stock Options Activity [Table Text Block]	'
	The following table presents stock options outstanding during 2013, 2012 and 2011 under these plans (in thousands, except for per share data):
			Number			Weighted-		Aggregate
						Average		Intrinsic
						Exercise		Value
						Price
	Options outstanding at December 31, 2010		3,135,334			$45.62		$	24,405
	Options awarded		185,007			55.94
	Options exercised		(576,518	)		44.35
	Options forfeited		(60,005	)		47.93
	Options expired		(62,471	)		54.13
	Options outstanding at December 31, 2011		2,621,347			$47.01		$	20,769
	Options awarded		67,155			58.76
	Options exercised		(708,295	)		45.32
	Options forfeited		(22,559	)		50.36
	Options expired		(66,862	)		45.97
	Options outstanding at December 31, 2012		1,890,786			$48.29		$	11,748
	Options awarded		81,492			55.74
	Options exercised		(608,663	)		48
	Options forfeited		(219,342	)		47.65
	Options expired		(9,168	)		50.61
	Options outstanding at December 31, 2013		1,135,105			$49.09		$	19,564
	Options vested at:
	December 31, 2011		825,682			$46.72		$	6,779
	December 31, 2012		601,367			47.99		3,890
	December 31, 2013		424,459			49.49		7,146
Outstanding and Vested Stock Options [Table Text Block]	'
	The following table summarizes information concerning currently outstanding and vested stock options:
	Options Outstanding									Options Vested
						Weighted								Weighted
						Average		Weighted					Weighted	Average
	Range of					Remaining		Average					Average	Remaining
	Exercise		Number			Contractual		Exercise		Number			Exercise	Contractual
	Prices		Outstanding			Life (years)		Price		Vested			Price	Life (years)
	$37.74		1,267			0.02		$37.74		1,267			$37.74	0.02
	45.15 - 47.34		84,725			1.42		47.12		84,725			47.12	1.42
	54.33		134,485			2.11		54.33		74,447			54.33	1.37
	48.46		233,739			2.88		48.46		80,747			48.46	1.66
	55.94		214,483			2.99		55.94		102,311			55.94	0.74
	36.65		253,607			3.44		36.65		61,449			36.65	1.64
	48.3		47,581			3.84		48.3		11,007			48.3	1.51
	58.76		83,726			5.18		58.76		8,506			58.76	2.03
	55.74		81,492			6.03		55.74		—			—	0
Assumptions used in the determination of fair value of stock options awarded [Table Text Block]	'
	The fair value of options was determined as of the date of grant using a Black-Scholes option pricing model with the following weighted average assumptions:
			2013				2012				2011
	Average risk-free interest rate1		0.89		%		0.93		%		1.87		%
	Dividend yield		2.8		%		2.2		%		1.8		%
	Volatility factors		0.272				0.28				0.268
	Weighted average expected life		4.9 years				4.9 years				4.9 years
	Weighted average fair value		$	9.67			$	11.48			$	11.92
	1	Average risk-free interest rate represents U.S. Treasury rates matched to the expected life of the options.
Schedule of Nonvested Share Activity [Table Text Block]	'
	The following represents a summary of the non-vested stock awards as of December 31, 2013 (in thousands):
			Shares			Weighted
						Average
						Grant Date
						Fair Value
	Non-vested at January 1, 2013		592,831
	Granted		211,791			$55.84
	Lapsed		(66,648	)		35.93
	Forfeited		(89,985	)		49.95
	Non-vested at December 31, 2013		647,989

Related_Parties_Related_Partie

Related Parties Related Parties (Tables)	12 Months Ended
	Dec. 31, 2013
Related Party Transaction [Line Items]	'
Schedule of Related Party Transactions [Table Text Block]	'
	Activity in loans to related parties is summarized as follows (in thousands):
			Year Ended December 31,
			2013			2012
	Beginning balance		$	49,943		$	99,340
	Advances		292,393			644,715
	Payments		(253,645		)	(684,942		)
	Adjustments1		—			(9,170		)
	Ending balance		$	88,691		$	49,943
	1	Adjustments generally consist of changes in status as a related party.

Commitments_and_Contingent_Lia1

Commitments and Contingent Liabilities Commitments and Contingent Liabilities - Variable Interest Entities (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Variable Interest Entities [Table Text Block]	'
	A summary of consolidated and unconsolidated alternative investments as of December 31, 2013 and December 31, 2012 is as follows (in thousands):
		December 31, 2013
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	27,341	$	—	$	—	$	23,036
	Tax credit entities	10,000		13,448		—		10,964		9,869
	Other	—		9,178		—		—		2,019
	Total consolidated	$	10,000	$	49,967	$	—	$	10,964	$	34,924
	Unconsolidated:
	Tax credit entities	$	27,319	$	90,260	$	35,776	$	—	$	—
	Other	—		9,257		1,681		—		—
	Total unconsolidated	$	27,319	$	99,517	$	37,457	$	—	$	—
		December 31, 2012
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	28,169	$	—	$	—	$	23,691
	Tax credit entities	10,000		13,965		—		10,964		10,000
	Other	—		8,952		—		—		2,130
	Total consolidated	$	10,000	$	51,086	$	—	$	10,964	$	35,821
	Unconsolidated:
	Tax credit entities	$	22,354	$	78,109	$	43,052	$	—	$	—
	Other	—		9,113		1,802		—		—
	Total unconsolidated	$	22,354	$	87,222	$	44,854	$	—	$	—
		December 31, 2013
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	27,341	$	—	$	—	$	23,036
	Tax credit entities	10,000		13,448		—		10,964		9,869
	Other	—		9,178		—		—		2,019
	Total consolidated	$	10,000	$	49,967	$	—	$	10,964	$	34,924
	Unconsolidated:
	Tax credit entities	$	27,319	$	90,260	$	35,776	$	—	$	—
	Other	—		9,257		1,681		—		—
	Total unconsolidated	$	27,319	$	99,517	$	37,457	$	—	$	—
		December 31, 2012
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	28,169	$	—	$	—	$	23,691
	Tax credit entities	10,000		13,965		—		10,964		10,000
	Other	—		8,952		—		—		2,130
	Total consolidated	$	10,000	$	51,086	$	—	$	10,964	$	35,821
	Unconsolidated:
	Tax credit entities	$	22,354	$	78,109	$	43,052	$	—	$	—
	Other	—		9,113		1,802		—		—
	Total unconsolidated	$	22,354	$	87,222	$	44,854	$	—	$	—

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Table Text Block]	'
		Year Ended
		2013		2012		2011
	Numerator:
	Net income attributable to BOK Financial Corp. shareholders	$	316,609	$	351,191	$	285,875
	Less: Earnings allocated to participating securities	3,388		2,541		2,214
	Numerator for basic earnings per share – income available to common shareholders	313,221		348,650		283,661
	Effect of reallocating undistributed earnings of participating securities	7		6		6
	Numerator for diluted earnings per share – income available to common shareholders	$	313,228	$	348,656	$	283,667
	Denominator:
	Weighted average shares outstanding	68,719,069		68,221,013		68,313,898
	Less:  Participating securities included in weighted average shares outstanding	730,172		536,970		526,222
	Denominator for basic earnings per common share	67,988,897		67,684,043		67,787,676
	Dilutive effect of employee stock compensation plans1	216,622		280,897		251,087
	Denominator for diluted earnings per common share	68,205,519		67,964,940		68,038,763
	Basic earnings per share	$	4.61	$	5.15	$	4.18
	Diluted earnings per share	$	4.59	$	5.13	$	4.17
	1  Excludes employee stock options with exercise prices greater than current market price.	—		224,653		769,041

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity Note [Abstract]	'
Summary of Regulatory Capital Levels [Table Text Block]	'
	A summary of regulatory capital levels follows (dollars in thousands):
			As of December 31,
			2013						2012
	Total Capital (to Risk Weighted Assets):
	Consolidated		$	3,017,022		15.56	%		$	2,877,949			15.13	%
	BOKF, NA		2,293,673			11.88			2,296,451				12.13
	Tier I Capital (to Risk Weighted Assets):
	Consolidated		$	2,668,981		13.77	%		$	2,430,671			12.78	%
	BOKF, NA		1,946,247			10.08			1,849,769				9.77
	Tier I Capital (to Average Assets):
	Consolidated		$	2,668,981		10.05	%		$	2,430,671			9.01	%
	BOKF, NA		1,946,247			7.38			1,849,769				6.89
Accumulated Other Comprehensive Income (Loss) [Table Text Block]	'
	A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):
			Unrealized Gain (Loss) on
			Available for Sale Securities			Investment Securities Transferred from AFS				Employee Benefit Plans				Loss on Effective Cash Flow Hedges			Total
	Balance, December 31, 2010		$	122,494		$	—			$	(13,777	)		$	(878	)	$	107,839
	Net change in unrealized gain (loss)		45,593			—				1,694				—			47,287
	Transfer of net unrealized gain from AFS to investment securities		(12,999		)	12,999				—				—			—
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(1,357		)		—				—			(1,357		)
	Interest expense, Subordinated debentures		—			—				—				304			304
	Net impairment losses recognized in earnings		23,507			—				—				—			23,507
	Gain on available for sale securities, net		(34,144		)	—				—				—			(34,144		)
	Other comprehensive income (loss), before income taxes		21,957			11,642				1,694				304			35,597
	Federal and state income tax1		(8,711		)	(4,969		)		(659		)		(118		)	(14,457		)
	Other comprehensive income (loss), net of income taxes		13,246			6,673				1,035				186			21,140
	Balance, December 31, 2011		135,740			6,673				(12,742		)		(692		)	128,979
	Net change in unrealized gain (loss)		58,921			—				7,276				—			66,197
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(6,601		)		—				—			(6,601		)
	Interest expense, Subordinated debentures		—			—				—				453			453
	Net impairment losses recognized in earnings		7,351			—				—				—			7,351
	Gain on available for sale securities, net		(33,845		)	—				—				—			(33,845		)
	Other comprehensive income (loss), before income taxes		32,427			(6,601		)		7,276				453			33,555
	Federal and state income tax1		(12,614		)	3,006				(2,830		)		(176		)	(12,614		)
	Other comprehensive income (loss), net of income taxes		19,813			(3,595		)		4,446				277			20,941
	Balance, December 31, 2012		155,553			3,078				(8,296		)		(415		)	149,920
	Net change in unrealized gain (loss)		(284,104		)	—				8,159				—			(275,945		)
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(3,210		)		—				—			(3,210		)
	Interest expense, Subordinated debentures		—			—				—				262			262
	Net impairment losses recognized in earnings		2,308			—				—				—			2,308
	Gain on available for sale securities, net		(10,720		)	—				—				—			(10,720		)
	Other comprehensive income (loss), before income taxes		(292,516		)	(3,210		)		8,159				262			(287,305		)
	Federal and state income tax1		113,788			1,250				(3,174		)		(102		)	111,762
	Other comprehensive income (loss), net of income taxes		(178,728		)	(1,960		)		4,985				160			(175,543		)
	Balance, December 31, 2013		$	(23,175	)	$	1,118			$	(3,311	)		$	(255	)	$	(25,623	)
	1	Calculated using 39% effective tax rate.

Reportable_Segments_Tables

Reportable Segments (Tables)	12 Months Ended
	Dec. 31, 2013
Segment Reporting [Abstract]	'
Reportable Segments [Table Text Block]	'
	Reportable segments reconciliation to the Consolidated Financial Statements for the year ended December 31, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	364,604		$	99,509		$	25,478		$	184,886		$	674,477
	Net interest revenue (expense) from internal sources	(37,025		)	20,290			20,061			(3,326		)	—
	Net interest revenue	327,579			119,799			45,539			181,560			674,477
	Provision for credit losses	(3,468		)	4,628			1,275			(30,335		)	(27,900		)
	Net interest revenue after provision for credit losses	331,047			115,171			44,264			211,895			702,377
	Other operating revenue	171,900			216,828			213,790			11,954			614,472
	Other operating expense	244,211			226,852			237,540			132,017			840,620
	Income before taxes	258,736			105,147			20,514			91,832			476,229
	Federal and state income tax	100,648			40,902			7,980			7,768			157,298
	Net income	158,088			64,245			12,534			84,064			318,931
	Net income attributable to non-controlling interest	—			—			—			2,322			2,322
	Net income attributable to BOK Financial Corp.	$	158,088		$	64,245		$	12,534		$	81,742		$	316,609
	Average assets	$	10,483,706		$	5,669,580		$	4,556,132		$	6,671,676		$	27,381,094
	Average invested capital	906,716			293,736			203,914			1,606,716			3,011,082
	Performance measurements:
	Return on average assets	1.51		%	1.13		%	0.28		%				1.16		%
	Return on average invested capital	17.44		%	21.87		%	6.15		%				10.51		%
	Efficiency ratio	49.18		%	66.62		%	91.92		%				65.03		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the year ended December 31, 2012 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	367,533		$	101,029		$	27,647		$	211,340		$	707,549
	Net interest revenue (expense) from internal sources	(43,438		)	21,305			21,456			677			—
	Net interest revenue	324,095			122,334			49,103			212,017			707,549
	Provision for credit losses	10,852			9,198			2,284			(44,334		)	(22,000		)
	Net interest revenue after provision for credit losses	313,243			113,136			46,819			256,351			729,549
	Other operating revenue	171,131			262,908			200,007			19,632			653,678
	Other operating expense	246,954			248,767			214,293			130,349			840,363
	Income before taxes	237,420			127,277			32,533			145,634			542,864
	Federal and state income tax	92,356			49,511			12,655			34,218			188,740
	Net income	145,064			77,766			19,878			111,416			354,124
	Net income attributable to non-controlling interest	—			—			—			2,933			2,933
	Net income attributable to BOK Financial Corp.	$	145,064		$	77,766		$	19,878		$	108,483		$	351,191
	Average assets	$	10,147,805		$	5,726,564		$	4,357,641		$	6,057,140		$	26,289,150
	Average invested capital	882,037			289,665			184,707			1,549,546			2,905,955
	Performance measurements:
	Return on average assets	1.43		%	1.36		%	0.46		%				1.34		%
	Return on average invested capital	16.45		%	26.85		%	10.76		%				12.09		%
	Efficiency ratio	51.36		%	63.97		%	86.23		%				62.87		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the year ended December 31, 2011 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	342,853		$	102,854		$	30,859		$	216,479		$	693,045
	Net interest revenue (expense) from internal sources	(30,689		)	27,416			16,540			(13,267		)	—
	Net interest revenue	312,164			130,270			47,399			203,212			693,045
	Provision for credit losses	20,760			13,598			2,960			(43,368		)	(6,050		)
	Net interest revenue after provision for credit losses	291,404			116,672			44,439			246,580			699,095
	Other operating revenue	147,545			182,875			171,827			26,291			528,538
	Other operating expense	230,458			239,302			190,702			118,836			779,298
	Income before taxes	208,491			60,245			25,564			154,035			448,335
	Federal and state income tax	81,103			23,435			9,944			44,029			158,511
	Net income	127,388			36,810			15,620			110,006			289,824
	Net income attributable to non-controlling interest	—			—			—			3,949			3,949
	Net income attributable to BOK Financial Corp.	$	127,388		$	36,810		$	15,620		$	106,057		$	285,875
	Average assets	$	9,383,530		$	5,937,584		$	4,073,623		$	5,100,124		$	24,494,861
	Average invested capital	884,171			273,905			174,877			1,348,912			2,681,865
	Performance measurements:
Return on average assets	1.36		%	0.62		%	0.38		%				1.17		%
Return on average invested capital	14.41		%	13.44		%	8.93		%				10.66		%
Efficiency ratio	50.22		%	73.06		%	87.21		%				63.83		%

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Assets And Liabilities Measured On A Recurring Basis [Table Text Block]	'
	The fair value of financial assets and liabilities that are measured on a recurring basis are as follows as of December 31, 2013 (in thousands):
			Total				Quoted Prices in Active Markets for Identical Instruments				Significant Other Observable Inputs			Significant Unobservable Inputs
	Assets:
	Trading securities:
	U.S. Government agency debentures		$	34,120			$	—			$	34,120		$	—
	U.S. agency residential mortgage-backed securities		21,011				—				21,011			—
	Municipal and other tax-exempt securities		27,350				—				27,350			—
	Other trading securities		9,135				—				9,135			—
	Total trading securities		91,616				—				91,616			—
	Available for sale securities:
	U.S. Treasury		1,042				1,042				—			—
	Municipal and other tax-exempt		73,775				—				55,970			17,805
	U.S. agency residential mortgage-backed securities		7,716,010				—				7,716,010			—
	Privately issued residential mortgage-backed securities		221,099				—				221,099			—
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,055,804				—				2,055,804			—
	Other debt securities		35,241				—				30,529			4,712
	Perpetual preferred stock		22,863				—				22,863			—
	Equity securities and mutual funds		21,328				—				17,121			4,207
	Total available for sale securities		10,147,162				1,042				10,119,396			26,724
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		157,431				—				157,431			—
	Other securities		9,694				—				9,694			—
	Total fair value option securities		167,125				—				167,125			—
	Residential mortgage loans held for sale		200,546				—				200,546			—
	Mortgage servicing rights, net1		153,333				—				—			153,333
	Derivative contracts, net of cash margin2		265,012				2,712				262,300			—
	Other assets – private equity funds		27,341				—				—			27,341
	Liabilities:
	Derivative contracts, net of cash margin2		247,185				—				247,185			—
	1	A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 7, Mortgage Banking Activities.
	2	See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets or identical instruments (Level 1) are exchange-traded energy derivative contracts, net of cash margin.
	The fair value of financial assets and liabilities that are measured on a recurring basis are as follows as of December 31, 2012 (in thousands):
			Total				Quoted Prices in Active Markets for Identical Instruments				Significant Other Observable Inputs			Significant Unobservable Inputs
	Assets:
	Trading securities:
	U.S. Government agency debentures		$	16,545			$	—			$	16,545		$	—
	U.S. agency residential mortgage-backed securities		86,361				—				86,361			—
	Municipal and other tax-exempt securities		90,326				—				90,326			—
	Other trading securities		20,870				—				20,870			—
	Total trading securities		214,102				—				214,102			—
	Available for sale securities:
	U.S. Treasury		1,002				1,002				—			—
	Municipal and other tax-exempt		87,142				—				46,440			40,702
	U.S. agency residential mortgage-backed securities		9,889,821				—				9,889,821			—
	Privately issued residential mortgage-backed securities		325,163				—				325,163			—
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		895,075				—				895,075			—
	Other debt securities		36,389				—				30,990			5,399
	Perpetual preferred stock		25,072				—				25,072			—
	Equity securities and mutual funds		27,557				4,165				21,231			2,161
	Total available for sale securities		11,287,221				5,167				11,233,792			48,262
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		257,040				—				257,040			—
	Corporate debt securities		26,486				—				26,486			—
	Other securities		770				—				770			—
	Total fair value option securities		284,296				—				284,296			—
	Residential mortgage loans held for sale		293,762				—				293,762			—
	Mortgage servicing rights, net1		100,812				—				—			100,812
	Derivative contracts, net of cash margin2		338,106				11,597				326,509			—
	Other assets – private equity funds		28,169				—				—			28,169
	Liabilities:
	Derivative contracts, net of cash margin 2		283,589				—				283,589			—
	1	A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 7, Mortgage Banking Activities.
	2	See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets for identical instruments (Level 1) are exchange-traded energy and agricultural derivative contracts, net of cash margin.
Fair Value Assets Measured On Recurring Basis Significant Unobservable Inputs [Table Text Block]	'
	The following represents the changes related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
			Available for Sale Securities											Other assets – private equity funds
			Municipal and other tax-exempt				Other debt securities				Equity securities and mutual funds
	Balance, December 31, 2011		$	42,353			$	5,900			$	—		$	30,902
	Transfer to Level 3 from Level 2		—				—				2,161			—
	Purchases and capital calls		—				—				—			3,446
	Redemptions and distributions		(988		)		(500		)		—			(9,819		)
	Gain (loss) recognized in earnings:
	Gain (loss) on other assets, net		—				—				—			3,640
	Gain on available for sale securities, net		1				—				—			—
	Other-than-temporary impairment losses		(642		)		—				—			—
	Other comprehensive loss		(22		)		(1		)		—			—
	Balance, December 31, 2012		40,702				5,399				2,161			28,169
	Transfer to Level 3 from Level 2		—				—				—			—
	Purchases and capital calls		—				—				—			1,415
	Redemptions and distributions		(19,238		)		(500		)		—			(5,294		)
	Gain (loss) recognized in earnings:
	Gain on other assets, net		—				—				—			3,051
	Gain on available for sale securities, net		1,216				—				—			—
	Other-than-temporary impairment losses		(1,369		)		—				—			—
	Other comprehensive income (loss)		(3,506		)		(187		)		2,046			—
	Balance, December 31, 2013		$	17,805			$	4,712			$	4,207		$	27,341
Fair Value Inputs, Assets, Quantitative Information [Table Text Block]	'
	A summary of quantitative information about assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) as of December 31, 2013 follows (in thousands):
	Quantitative Information about Level 3 Recurring Fair Value Measurements
			Par				Amortized				Fair			Valuation Technique(s)		Unobservable Input		Range
			Value				Cost				Value							(Weighted Average)
	Available for sale securities
	Municipal and other tax-exempt securities – Investment grade		$	18,695			$	18,624			$	17,805		Discounted cash flows	1	Interest rate spread		4.97%-5.27% (5.16%)	2
																		95.02%-95.50% (95.24%)	3
	Other debt securities		4,900				4,900				4,712			Discounted cash flows	1	Interest rate spread		5.67% (5.67%)	4
																		96.16% (96.16%)	3
	Equity securities and other mutual funds		N/A				2,420				4,207			Publicly announced preliminary purchase price information from acquirer.		Discount for settlement uncertainty.		N/A	5
	Other assets - private equity funds		N/A				N/A				27,341			Net asset value reported by underlying fund		Net asset value reported by underlying fund		N/A
	1	Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume
	2	Interest rate yields used to value investment grade tax-exempt securities represent a spread of 467 to 518 basis points over average yields for comparable tax-exempt securities.
	3	Represents fair value as a percentage of par value.
	4	Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 1%.
	5	Fair value of shares of a smaller privately-held financial institution were valued using preliminary announced purchase information by a publicly-traded acquirer.
	The fair value of these securities measured at fair value using significant unobservable inputs are sensitive primarily to changes in interest rate spreads. At December 31, 2013, for tax-exempt securities rated investment grade by all nationally-recognized rating agencies, a 100 basis point increase in the spreads over average yields for comparable securities would result in an additional decrease in the fair value of $172 thousand. For taxable securities rated investment grade by all nationally-recognized rating agencies, a 100 basis point increase in the spreads over average yield for comparable securities would result in an additional decrease in the fair value of $36 thousand.
	A summary of quantitative information about Recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2012 follows (in thousands):
	Quantitative Information about Level 3 Recurring Fair Value Measurements
			Par				Amortized				Fair			Valuation Technique(s)		Unobservable Input		Range
			Value				Cost6				Value							(Weighted Average)
	Available for sale securities
	Municipal and other tax-exempt securities
	Investment grade		$	28,570			$	28,473			$	28,318		Discounted cash flows	1	Interest rate spread		1.00%-1.50% (1.25%)	2
																		98.83%-99.43% (99.12%)	3
	Below investment grade		17,000				12,384				12,384			Discounted cash flows	1	Interest rate spread		7.21%-9.83% (7.82%)	4
																		72.79%-73.00% (72.85%)	3
	Total municipal and other tax-exempt securities		45,570				40,857				40,702
	Other debt securities		5,400				5,400				5,399			Discounted cash flows	1	Interest rate spread		1.65%-1.71% (1.70%)	5
																		100% (100%)	3
	Equity securities and other mutual funds		N/A				2,420				2,161			Tangible book value per share of publicly traded financial institutions of similar size, less liquidity discount.		Peer group tangible book per share and liquidity discount		N/A	7
	Other assets - private equity funds		N/A				N/A				28,169			Net asset value reported by underlying fund		Net asset value reported by underlying fund		N/A
	1	Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume
	2	Interest rate yields used to value investment grade tax-exempt securities represent a spread of 75 to 80 basis points over average yields for comparable tax-exempt securities.
	3	Represents fair value as a percentage of par value
	4	Interest rate yields determined using a spread of 700 basis points over comparable municipal securities of varying durations.
	5	Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 1%.
	6	Amortized cost reduced by other-than-temporary impairments recorded in earnings. See Note 2 for additional discussion.
	7	Fair value of shares of a smaller privately-held financial institution were valued using the tangible book value per share of similarly sized financial institutions within the immediate geographical market with a discount of 20% due to the liquidity of the shares.
	A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2013 follows (in thousands):
	Quantitative Information about Level 3 Non-recurring Fair Value Measurements
			Fair Value				Valuation Technique(s)		Unobservable Input		Range
											(Weighted Average)
	Impaired loans		$	4,622			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
	Real estate and other repossessed assets		191				Listing value, less cost to sell		Marketability adjustments off appraised value		80%-85% (82%)1
	1	Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value.
	A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of December 31, 2012 follows (in thousands):
	Quantitative Information about Level 3 Non-recurring Fair Value Measurements
			Fair Value				Valuation Technique(s)		Unobservable Input		Range
											(Weighted Average)
	Impaired loans		$	3,891			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
	Real estate and other repossessed assets		4,421				Listing value, less cost to sell		Marketability adjustments off appraised value		58%-85%(76%)1
	1	Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value. In addition, $345 thousand of real estate and other repossessed assets at December 31, 2012 are based on uncorroborated expert opinions or management's knowledge of the collateral or industry and do not have an independently appraised value.
Fair Value Assets Measured on Nonrecurring Basis [Table Text Block]	'
	The following represents the carrying value of assets measured at fair value on a non-recurring basis and related losses recorded during the year. The carrying value represents only those assets with the balance sheet date for which the fair value was adjusted during the year:
		Carrying Value at December 31, 2013											Fair Value Adjustments for the
													Year Ended December 31, 2013
													Recognized in:
		Quoted Prices				Significant				Significant			Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net
		in Active Markets for Identical Instruments				Other				Unobservable
						Observable				Inputs
						Inputs
	Impaired loans	$	—			$	8,380			$	4,622		$	6,598			$	—
	Real estate and other repossessed assets	—				20,733				191			—				5,489
		Carrying Value at December 31, 2012											Fair Value Adjustments for the Three Months Ended
													31-Dec-12
													Recognized in:
		Quoted Prices				Significant				Significant			Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net
		in Active Markets for Identical Instruments				Other				Unobservable
						Observable				Inputs
						Inputs
	Impaired loans	$	—			$	21,589			$	3,891		$	11,615			$	—
	Real estate and other repossessed assets	—				39,077				4,421			—				15,954
Fair Value of Financial Instruments [Table Text Block]	'
	The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or non-recurring (dollars in thousands):
			31-Dec-13
			Carrying				Range of Contractual Yields				Average		Discount Rate				Estimated
			Value								Re-pricing						Fair
											(in years)						Value
	Cash and due from banks		$	512,931													$	512,931
	Interest-bearing cash and cash equivalents		574,282														574,282
	Trading securities:
	U.S. Government agency obligations		34,120														34,120
	U.S. agency residential mortgage-backed securities		21,011														21,011
	Municipal and other tax-exempt securities		27,350														27,350
	Other trading securities		9,135														9,135
	Total trading securities		91,616														91,616
	Investment securities:
	Municipal and other tax-exempt		440,187														439,870
	U.S. agency residential mortgage-backed securities		50,182														51,864
	Other debt securities		187,509														195,393
	Total investment securities		677,878														687,127
	Available for sale securities:
	U.S. Treasury		1,042														1,042
	Municipal and other tax-exempt		73,775														73,775
	U.S. agency residential mortgage-backed securities		7,716,010														7,716,010
	Privately issued residential mortgage-backed securities		221,099														221,099
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		2,055,804														2,055,804
	Other debt securities		35,241														35,241
	Perpetual preferred stock		22,863														22,863
	Equity securities and mutual funds		21,328														21,328
	Total available for sale securities		10,147,162														10,147,162
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		157,431														157,431
	Corporate debt securities		—														—
	Other securities		9,694														9,694
	Total fair value option securities		167,125														167,125
	Residential mortgage loans held for sale		334,250														200,546
	Loans:
	Commercial		7,943,221				0.04	% -	30.00%		0.49		0.48	% -	4.33%		7,835,325
	Commercial real estate		2,415,353				0.38	% -	18.00%		0.78		1.21	% -	3.49%		2,394,443
	Residential mortgage		2,052,026				0.38	% -	18.00%		2.63		0.59	% -	4.73%		2,068,690
	Consumer		381,664				0.38	% -	21.00%		0.55		1.22	% -	3.75%		375,962
	Total loans		12,792,264														12,674,420
	Allowance for loan losses		(185,396		)												—
	Net loans		12,606,868														12,674,420
	Mortgage servicing rights		153,333														153,333
	Derivative instruments with positive fair value, net of cash margin		265,012														265,012
	Other assets – private equity funds		27,341														27,341
	Deposits with no stated maturity		17,573,334														17,573,334
	Time deposits		2,695,993				0.01	% -	9.64%		2.12		0.75	% -	1.33%		2,697,290
	Other borrowings		2,721,888				0.25	% -	4.78%		0.03		0.08	% -	2.64%		2,693,788
	Subordinated debentures		347,802				0.95	% -	5.00%		2.63		2.22%				344,783
	Derivative instruments with negative fair value, net of cash margin		247,185														247,185
			31-Dec-12
			Carrying				Range of Contractual Yields				Average		Discount Rate				Estimated
			Value								Re-pricing						Fair
											(in years)						Value
	Cash and due from banks		$	710,739													$	710,739
	Interest-bearing cash and cash equivalents		575,500														575,500
	Trading securities:
	Obligations of the U.S. government		16,545														16,545
	U.S. agency residential mortgage-backed securities		86,361														86,361
	Municipal and other tax-exempt securities		90,326														90,326
	Other trading securities		20,870														20,870
	Total trading securities		214,102														214,102
	Investment securities:
Municipal and other tax-exempt		232,700														235,940
U.S. agency residential mortgage-backed securities		82,767														85,943
Other debt securities		184,067														206,575
Total investment securities		499,534														528,458
Available for sale securities:
U.S. Treasury		1,002														1,002
Municipal and other tax-exempt		87,142														87,142
U.S. agency residential mortgage-backed securities		9,889,821														9,889,821
Privately issued residential mortgage-backed securities		325,163														325,163
Commercial mortgage-backed securities guaranteed by U.S. government agencies		895,075														895,075
Other debt securities		36,389														36,389
Perpetual preferred stock		25,072														25,072
Equity securities and mutual funds		27,557														27,557
Total available for sale securities		11,287,221														11,287,221
Fair value option securities:
U.S. agency residential mortgage-backed securities		257,040														257,040
Corporate debt securities		26,486														26,486
Other securities		770														770
Total fair value option securities		284,296														284,296
Residential mortgage loans held for sale		293,762														293,762
Loans:
Commercial		7,641,912				0.21	% -	30.00%		0.69		0.51	% -	3.59%		7,606,505
Commercial real estate		2,228,999				0.21	% -	18.00%		0.92		1.26	% -	3.18%		2,208,217
Residential mortgage		2,045,040				0.38	% -	18.00%		3.34		0.86	% -	3.09%		2,110,773
Consumer		395,505				0.38	% -	21.00%		0.32		1.37	% -	3.60%		388,748
Total loans		12,311,456														12,314,243
Allowance for loan losses		(215,507		)												—
Net loans		12,095,949														12,314,243
Mortgage servicing rights		100,812														100,812
Derivative instruments with positive fair value, net of cash margin		338,106														338,106
Other assets – private equity funds		28,169														28,169
Deposits with no stated maturity		18,211,068														18,211,068
Time deposits		2,967,992				0.01	% -	9.64%		2.15		0.8	% -	1.15%		3,441,610
Other borrowings		2,706,221				0.09	% -	5.25%		—		0.09	% -	2.67%		2,369,224
Subordinated debentures		347,633				1	% -	5.00%		3.56		2.40%				411,243
Derivative instruments with negative fair value, net of cash margin		283,589														283,589

Parent_Company_Only_Financial_1

Parent Company Only Financial Statements Parent Company Only Financial Statements (Tables)	12 Months Ended
	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Financial Statements [Table Text Block]	'
	Summarized financial information for BOK Financial – Parent Company Only follows:
	Balance Sheets
	(In thousands)	December 31,
		2013			2012
	Assets
	Cash and cash equivalents	$	561,297		$	457,514
	Available for sale securities	27,526			44,881
	Investment in subsidiaries	2,426,495			2,464,729
	Other assets	12,872			4,324
	Total assets	$	3,028,190		$	2,971,448
	Liabilities and Shareholders’ Equity
	Other liabilities	$	8,141		$	13,588
	Total liabilities	8,141			13,588
	Shareholders’ equity:
	Common stock	4			4
	Capital surplus	898,586			859,278
	Retained earnings	2,349,428			2,137,541
	Treasury stock	(202,346		)	(188,883		)
	Accumulated other comprehensive income (loss)	(25,623		)	149,920
	Total shareholders’ equity	3,020,049			2,957,860
	Total liabilities and shareholders’ equity	$	3,028,190		$	2,971,448
	Statements of Earnings
	(In thousands)	Year Ended December 31,
		2013			2012			2011
	Dividends, interest and fees received from subsidiaries	$	225,340		$	275,330		$	270,474
	Other revenue	3,341			2,295			2,128
	Other-than-temporary impairment losses recognized in earnings	—			(1,099		)	(2,098		)
	Total revenue	228,681			276,526			270,504
	Interest expense	292			269			354
	Professional fees and services	811			765			538
	Other operating expense	3,272			3,099			7,688
	Total expense	4,375			4,133			8,580
	Income before taxes and equity in undistributed income of subsidiaries	224,306			272,393			261,924
	Federal and state income tax (benefit)	(1,578		)	(1,706		)	(3,169		)
	Income before equity in undistributed income of subsidiaries	225,884			274,099			265,093
	Equity in undistributed income of subsidiaries	90,725			77,092			20,782
	Net income attributable to BOK Financial Corp. shareholders	$	316,609		$	351,191		$	285,875
	Statements of Cash Flows
	(In thousands)	Year Ended December 31,
		2013			2012			2011
	Cash flows from operating activities:
	Net income	$	316,609		$	351,191		$	285,875
	Adjustments to reconcile net income to net cash provided by operating activities:
	Equity in undistributed income of subsidiaries	(90,725		)	(77,092		)	(20,782		)
	Tax benefit on exercise of stock options	(2,210		)	(120		)	(659		)
	Change in other assets	(8,308		)	4,237			15,249
	Change in other liabilities	4,263			(4,965		)	(18,225		)
	Net cash provided by operating activities	219,629			273,251			261,458
	Cash flows from investing activities:
	Purchases of available for sale securities	—			(5,343		)	(3,797		)
	Sales of available for sale securities	13,600			4,781			16,500
	Investment in subsidiaries	(36,000		)	(9,100		)	(7,250		)
	Acquisitions, net of cash acquired	(7,500		)	(20,000		)	—
	Net cash provided by (used in) investing activities	(29,900		)	(29,662		)	5,453
	Cash flows from financing activities:
	Issuance of common and treasury stock, net	16,566			14,650			14,541
	Tax benefit on exercise of stock options	2,210			120			659
	Dividends paid	(104,722		)	(166,982		)	(76,423		)
	Repurchase of common stock	—			(20,558		)	(26,446		)
	Net cash used in financing activities	(85,946		)	(172,770		)	(87,669		)
	Net increase in cash and cash equivalents	103,783			70,819			179,242
	Cash and cash equivalents at beginning of period	457,514			386,695			207,453
	Cash and cash equivalents at end of period	$	561,297		$	457,514		$	386,695
Cash paid for interest	$	292		$	269		$	354

Significant_Accounting_Policie2

Significant Accounting Policies Goodwill and Intangible Assets (Details)	12 Months Ended
	Dec. 31, 2013
Core Deposits [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Finite-Lived Intangible Asset, Weighted Average Useful Life	'5 years
Minimum [Member] | Other Intangible Assets [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Finite-Lived Intangible Asset, Useful Life	'5 years
Maximum [Member] | Other Intangible Assets [Member]	'
Acquired Finite-Lived Intangible Assets [Line Items]	'
Finite-Lived Intangible Asset, Useful Life	'20 years

Significant_Accounting_Policie3

Significant Accounting Policies Cash Equivalents (Details)	12 Months Ended
	Dec. 31, 2013
Cash Equivalents [Abstract]	'
Maturity of Federal Funds Sold Considered Cash Equivalents	'1 day
Maturity of Resell Agreement Considered Cash Equivalents, Minimum	'1 day
Maturity of Resell Agreements Considered Cash Equivalents, Maximum	'30 days

Significant_Accounting_Policie4

Significant Accounting Policies Derivative Instruments (Details)	12 Months Ended
	Dec. 31, 2013
Derivative Instruments [Abstract]	'
Effective Fair Value Hedge, Fair Value Adjustment of Interest Rate Swap to Cumulative Change in Fair Value of Hedged Item, Minimum	80.00%
Effective Fair Value Hedge, Fair Value Adjustment of Interest Rate Swap to Cumulative Change in Fair Value of Hedged Item, Maximum	120.00%

Significant_Accounting_Policie5

Significant Accounting Policies Loans (Details)	12 Months Ended
	Dec. 31, 2013
Loans [Abstract]	'
Loans, Number of Days Past Due for a Non-Risk Graded Loan to be Placed on Nonaccruing Status	'90 days
Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Placed on Nonaccruing Status	'60 days
Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	'60 days
Max No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	'180 days
Loans, Number of Days After Notification of Chapter 7 Bankruptcy Non-Risk Graded Loan is Charged Off	'60 days

Significant_Accounting_Policie6

Significant Accounting Policies Premises and Equipment (Details)	12 Months Ended
	Dec. 31, 2013
Building and improvements [Member] | Minimum [Member]	'
Premises and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'5 years
Building and improvements [Member] | Maximum [Member]	'
Premises and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'40 years
Software and Software Development Costs [Member] | Minimum [Member]	'
Premises and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'3 years
Software and Software Development Costs [Member] | Maximum [Member]	'
Premises and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'10 years
Furniture and equipment [Member] | Minimum [Member]	'
Premises and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'3 years
Furniture and equipment [Member] | Maximum [Member]	'
Premises and Equipment [Line Items]	'
Property, Plant and Equipment, Useful Life	'10 years

Significant_Accounting_Policie7

Significant Accounting Policies Employee Benefit Plans (Details)	12 Months Ended
	Dec. 31, 2013
Employee Benefits [Abstract]	'
Amortization Period for Unrecognized Prior Service Cost Net Gains and Losses	'4 years

Significant_Accounting_Policie8

Significant Accounting Policies Stock Compensation (Details)	12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Jan. 31, 2014	Dec. 31, 2013	Dec. 31, 2013
	Stock Options [Member]	Non-vested Common Stock [Member]	Prior to 2013 [Member]	2013 Plan [Member]
			Non-vested Common Stock [Member]	Non-vested Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Vesting period (in years)	'7 years	'3 years	'5 years	'3 years
Share-based Compensation Arrangement by Share-based Payment Award, Award Required Holding Period	'	'	'	'2 years

Trading_Securities_Details

Trading Securities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Schedule of Trading Securities [Line Items]	'	'
Trading Securities, Fair Value	$91,616,000	$214,102,000
Trading Securities, Net Unrealized Gain (Loss)	11,000	151,000
U.S. Government agency debentures [Member]	'	'
Schedule of Trading Securities [Line Items]	'	'
Trading Securities, Fair Value	34,120,000	16,545,000
Trading Securities, Net Unrealized Gain (Loss)	77,000	-57,000
U.S. agency residential mortgage-backed securities [Member]	'	'
Schedule of Trading Securities [Line Items]	'	'
Trading Securities, Fair Value	21,011,000	86,361,000
Trading Securities, Net Unrealized Gain (Loss)	123,000	447,000
Municipal and other tax-exempt securities [Member]	'	'
Schedule of Trading Securities [Line Items]	'	'
Trading Securities, Fair Value	27,350,000	90,326,000
Trading Securities, Net Unrealized Gain (Loss)	-182,000	-226,000
Trading Securities Pledged as Collateral	0	13,000,000
Other trading securities [Member]	'	'
Schedule of Trading Securities [Line Items]	'	'
Trading Securities, Fair Value	9,135,000	20,870,000
Trading Securities, Net Unrealized Gain (Loss)	($7,000)	($13,000)

Investment_HeldtoMaturity_Secu

Investment (Held-to-Maturity) Securities (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Sep. 30, 2011
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'
Investment Securities, Amortized Cost	$676,047,000		$494,493,000		'
Investment Securities, Debt Maturities, Net Carrying Value	677,878,000	[1]	499,534,000	[2]	'
Investment Securities, Fair Value	687,127,000		528,458,000		'
Investment Securities, Gross Unrealized Gain	12,687,000	[3]	29,427,000	[3]	'
Investment Securities, Gross Unrealized Loss	-3,438,000	[3]	-503,000	[3]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	677,878,000	[1]	499,534,000	[2]	'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'
Investment Securities, Fair Value	687,127,000		528,458,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'
Investment Securities, Debt Maturities, Nominal Yield	3.23%		'		'
Investment Securities, Pledged as Collateral [Abstract]	'		'		'
Investment Securities, Pledged as Collateral, Carrying Value	89,087,000		117,346,000		'
Investment Securities, Pledged as Collateral, Fair Value	91,804,000		121,647,000		'
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	139		67		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	192,538,000		93,649,000		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	53,850,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	246,388,000		93,649,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	2,526,000		503,000		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	912,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	3,438,000		503,000		'
Other than Temporary Impairment Losses, Investment Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Carrying Value	50,182,000		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	51,864,000		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	448,046,000		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	454,710,000		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Carrying Value	20,784,000		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Fair Value	21,012,000		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Not Rated, Carrying Value	158,866,000		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	159,541,000		'		'
Fixed Maturity Securities [Member]	'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	627,696,000		'		'
Investment Securities, Fair Value	635,263,000		'		'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value	42,959,000		'		'
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value	341,494,000		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value	102,412,000		'		'
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value	140,831,000		'		'
Investment Securities, Debt Maturities, Net Carrying Value	627,696,000		'		'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less than One Year, Fair Value	43,136,000		'		'
Investment Securities, Debt Maturities, One to Five Years, Fair Value	341,970,000		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value	101,854,000		'		'
Investment Securities, Debt Maturities, Over Ten Years, Fair Value	148,303,000		'		'
Investment Securities, Fair Value	635,263,000		'		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield	3.16%		'		'
Investment Securities, Debt Maturities, One to Five Years, Nominal Yield	1.98%		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield	3.79%		'		'
Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield	5.84%		'		'
Investment Securities, Debt Maturities, Nominal Yield	3.27%		'		'
Investment Securities, Debt Maturities, Weighted Average Maturity	5.69	[4]	'		'
Municipal and other tax-exempt securities [Member]	'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'
Investment Securities, Amortized Cost	440,187,000		232,700,000		'
Investment Securities, Debt Maturities, Net Carrying Value	440,187,000		232,700,000		'
Investment Securities, Fair Value	439,870,000		235,940,000		'
Investment Securities, Gross Unrealized Gain	2,452,000	[3]	3,723,000	[3]	'
Investment Securities, Gross Unrealized Loss	-2,769,000	[3]	-483,000	[3]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value	33,821,000		'		'
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value	308,451,000		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value	57,873,000		'		'
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value	40,042,000		'		'
Investment Securities, Debt Maturities, Net Carrying Value	440,187,000		232,700,000		'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less than One Year, Fair Value	33,996,000		'		'
Investment Securities, Debt Maturities, One to Five Years, Fair Value	308,701,000		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value	57,168,000		'		'
Investment Securities, Debt Maturities, Over Ten Years, Fair Value	40,005,000		'		'
Investment Securities, Fair Value	439,870,000		235,940,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield	2.91%	[5]	'		'
Investment Securities, Debt Maturities, One to Five Years, Nominal Yield	1.66%	[5]	'		'
Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield	2.65%	[5]	'		'
Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield	4.75%	[5]	'		'
Investment Securities, Debt Maturities, Nominal Yield	2.23%	[5]	'		'
Investment Securities, Debt Maturities, Weighted Average Maturity	4.43	[4]	'		'
Investment Securities, Debt Maturities, Effective tax rate for nominal yield calculation	39.00%		'		'
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	107		53		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	166,382,000		92,768,000		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	53,073,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	219,455,000		92,768,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	1,921,000		483,000		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	848,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,769,000		483,000		'
Other than Temporary Impairment Losses, Investment Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Carrying Value	0	[6]	'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[6]	'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	280,583,000		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	278,789,000		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Carrying Value	20,784,000		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Fair Value	21,012,000		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Not Rated, Carrying Value	138,820,000		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	140,069,000		'		'
Other debt securities [Member]	'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'
Investment Securities, Amortized Cost	187,509,000		184,067,000		'
Investment Securities, Debt Maturities, Net Carrying Value	187,509,000		184,067,000		'
Investment Securities, Fair Value	195,393,000		206,575,000		'
Investment Securities, Gross Unrealized Gain	8,497,000	[3]	22,528,000	[3]	'
Investment Securities, Gross Unrealized Loss	-613,000	[3]	-20,000	[3]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value	9,138,000		'		'
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value	33,043,000		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value	44,539,000		'		'
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value	100,789,000		'		'
Investment Securities, Debt Maturities, Net Carrying Value	187,509,000		184,067,000		'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less than One Year, Fair Value	9,140,000		'		'
Investment Securities, Debt Maturities, One to Five Years, Fair Value	33,269,000		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value	44,686,000		'		'
Investment Securities, Debt Maturities, Over Ten Years, Fair Value	108,298,000		'		'
Investment Securities, Fair Value	195,393,000		206,575,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield	4.08%		'		'
Investment Securities, Debt Maturities, One to Five Years, Nominal Yield	5.02%		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield	5.27%		'		'
Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield	6.27%		'		'
Investment Securities, Debt Maturities, Nominal Yield	5.71%		'		'
Investment Securities, Debt Maturities, Weighted Average Maturity	8.63	[4]	'		'
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	30		14		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	10,932,000		881,000		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	777,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	11,709,000		881,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	549,000		20,000		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	64,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	613,000		20,000		'
Other than Temporary Impairment Losses, Investment Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Carrying Value	0	[6]	'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[6]	'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	167,463,000		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	175,921,000		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Not Rated, Carrying Value	20,046,000		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	19,472,000		'		'
U.S. agency residential mortgage-backed securities [Member]	'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	50,182,000		82,767,000		'
Investment Securities, Fair Value	51,864,000		85,943,000		'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	50,182,000		82,767,000		'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'
Investment Securities, Fair Value	51,864,000		85,943,000		'
U.S. agency residential mortgage-backed securities [Member] | Other [Member]	'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'
Investment Securities, Amortized Cost	48,351,000		77,726,000		'
Investment Securities, Debt Maturities, Net Carrying Value	50,182,000		'		'
Investment Securities, Fair Value	51,864,000		'		'
Investment Securities, Gross Unrealized Gain	1,738,000	[3]	3,176,000	[3]	'
Investment Securities, Gross Unrealized Loss	-56,000	[3]	0	[3]	'
Investments Securities, Transfers [Abstract]	'		'		'
Investment Securities, Transferred From Available For Sale Securities Portfolio, Fair Value	'		'		131,000,000
Investment Securities, Transferred From Available For Sale Securities Portfolio, Amortized Cost	'		'		118,000,000
Investment Securities, Transferred From Available For Sale Securities Portfolio, Net Unrealized Gain	1,800,000		5,000,000		13,000,000
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	50,182,000		'		'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'
Investment Securities, Fair Value	51,864,000		'		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'
Investment Securities, Debt Maturities, Nominal Yield	2.73%	[7]	'		'
Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities	3.1		'		'
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	2		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	15,224,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	15,224,000		0		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	56,000		0		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	0		0		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	56,000		0		'
Other than Temporary Impairment Losses, Investment Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Carrying Value	50,182,000	[6]	'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	51,864,000	[6]	'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'
Investment Securities, Portfolio Concentration Not Rated, Carrying Value	0		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	$0		'		'
[1]	Carrying value includes $1.8 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
[2]	Carrying value includes $5.0 million of net unrealized gain which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
[3]	Gross unrealized gains and losses are not recognized in AOCI in the Consolidated Balance Sheets.
[4]	Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.
[5]	Calculated on a taxable equivalent basis using a 39% effective tax rate.
[6]	U.S. government and government sponsored enterprises are not rated by the nationally-recognized rating agencies as these securities are guaranteed by agencies of the U.S. government or government-sponsored enterprises.
[7]	The nominal yield on residential mortgage-backed securities is based upon prepayment assumptions at the purchase date. Actual yields earned may differ significantly based upon actual prepayments. See Quarterly Financial Summary - Unaudited for current yields on the investment securities portfolio.

Available_for_Sale_Securities_

Available for Sale Securities (Details) (USD $)	12 Months Ended					60 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	$10,185,091,000		$11,032,634,000		'	$10,185,091,000
Available-for-sale Securities, Fair Value	10,147,162,000		11,287,221,000		'	10,147,162,000
Available-for-sale Securities, Gross Unrealized Gains	120,120,000	[1]	261,184,000	[2]	'	120,120,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-155,607,000	[1]	-2,414,000	[2]	'	-155,607,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	-2,442,000	[3]	-4,183,000	[3]	'	-2,442,000	[3]
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Nominal Yield	1.80%		'		'	1.80%
Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]	'		'		'	'
Available-for-sale Securities, Proceeds	2,436,093,000		1,744,662,000		2,725,760,000	'
Available-for-sale Securities, Gross realized gains	25,711,000		41,191,000		41,284,000	'
Available-for-sale Securities, Gross realized losses	-14,991,000		-7,346,000		-7,140,000	'
Related federal and state income tax expense	4,170,000		13,166,000		13,282,000	'
Available-for-sale Securities, Pledged as Collateral [Abstract]	'		'		'	'
Available-for-sale Securities, Pledged As Collateral, Amortized cost	5,171,782,000		4,070,250,000		'	5,171,782,000
Available-for-sale Securities, Pledged As Collateral, Fair value	5,133,530,000		4,186,390,000		'	5,133,530,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	446		106		'	446
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	6,230,595,000		448,144,000		'	6,230,595,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	50,865,000		159,428,000		'	50,865,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,281,460,000		607,572,000		'	6,281,460,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	156,172,000		1,850,000		'	156,172,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	1,877,000		4,747,000		'	1,877,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	158,049,000		6,597,000		'	158,049,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	9,821,377,000	[4]	'		'	9,821,377,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	9,772,856,000	[4]	'		'	9,772,856,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	49,873,000		'		'	49,873,000
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	51,153,000		'		'	51,153,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	57,421,000		'		'	57,421,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	57,933,000		'		'	57,933,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	224,946,000		'		'	224,946,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	232,103,000		'		'	232,103,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Net Unrealized Gain (Loss)	-2,400,000		'		'	-2,400,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	31,474,000		'		'	31,474,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	33,117,000		'		'	33,117,000
Fixed Maturity Securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	2,209,481,000		'		'	2,209,481,000
Available-for-sale Securities, Fair Value	2,165,862,000		'		'	2,165,862,000
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis	27,890,000		'		'	27,890,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis	667,679,000		'		'	667,679,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Amortized Cost Basis	1,107,334,000		'		'	1,107,334,000
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis	406,578,000		'		'	406,578,000
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less Than One Year, Fair Value	28,194,000		'		'	28,194,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value	661,948,000		'		'	661,948,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value	1,076,922,000		'		'	1,076,922,000
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value	398,798,000		'		'	398,798,000
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield	2.05%		'		'	2.05%
Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield	1.37%		'		'	1.37%
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Nominal Yield	1.44%		'		'	1.44%
Available-for-sale Securities, Debt Maturities, Greater Than Ten Years, Nominal Yield	1.58%		'		'	1.58%
Available-for-sale Securities, Debt Maturities, Nominal Yield	1.45%		'		'	1.45%
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	9.38	[5]	'		'	9.38	[5]
US Treasury Securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	1,042,000		1,000,000		'	1,042,000
Available-for-sale Securities, Fair Value	1,042,000		1,002,000		'	1,042,000
Available-for-sale Securities, Gross Unrealized Gains	0	[1]	2,000	[2]	'	0	[1]
Available-for-sale Securities, Gross Unrealized Loss	0	[1]	0	[2]	'	0	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis	1,042,000		'		'	1,042,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis	0		'		'	0
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Amortized Cost Basis	0		'		'	0
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis	0		'		'	0
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less Than One Year, Fair Value	1,042,000		'		'	1,042,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value	0		'		'	0
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value	0		'		'	0
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value	0		'		'	0
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield	0.24%		'		'	0.24%
Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield	0.00%		'		'	0.00%
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Nominal Yield	0.00%		'		'	0.00%
Available-for-sale Securities, Debt Maturities, Greater Than Ten Years, Nominal Yield	0.00%		'		'	0.00%
Available-for-sale Securities, Debt Maturities, Nominal Yield	0.24%		'		'	0.24%
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	1.16	[5]	'		'	1.16	[5]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	1,042,000	[4]	'		'	1,042,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	1,042,000	[4]	'		'	1,042,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Municipal and other tax-exempt securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	73,232,000		84,892,000		'	73,232,000
Available-for-sale Securities, Fair Value	73,775,000		87,142,000		'	73,775,000
Available-for-sale Securities, Gross Unrealized Gains	1,606,000	[1]	2,414,000	[2]	'	1,606,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-1,063,000	[1]	-164,000	[2]	'	-1,063,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis	1,856,000		'		'	1,856,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis	36,183,000		'		'	36,183,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Amortized Cost Basis	3,239,000		'		'	3,239,000
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis	31,954,000		'		'	31,954,000
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less Than One Year, Fair Value	1,882,000		'		'	1,882,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value	37,470,000		'		'	37,470,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value	3,451,000		'		'	3,451,000
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value	30,972,000		'		'	30,972,000
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield	6.35%	[6]	'		'	6.35%	[6]
Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield	3.84%	[6]	'		'	3.84%	[6]
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Nominal Yield	6.34%	[6]	'		'	6.34%	[6]
Available-for-sale Securities, Debt Maturities, Greater Than Ten Years, Nominal Yield	5.41%	[6],[7]	'		'	5.41%	[6],[7]
Available-for-sale Securities, Debt Maturities, Nominal Yield	4.70%	[6]	'		'	4.70%	[6]
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	10.48	[5]	'		'	10.48	[5]
Available-for-sale Securities, Debt Maturities, Effective tax rate for nominal yield calculation	39.00%		'		'	39.00%
Available-for-sale Securities, Debt Maturities, Number of days for interest rates to reset	'35 days		'		'	'35 days
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	27		38		'	27
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	13,286,000		6,150,000		'	13,286,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	17,805,000		26,108,000		'	17,805,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	31,091,000		32,258,000		'	31,091,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	245,000		11,000		'	245,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	818,000		153,000		'	818,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,063,000		164,000		'	1,063,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	44,969,000		'		'	44,969,000
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	45,984,000		'		'	45,984,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	15,854,000		'		'	15,854,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	15,545,000		'		'	15,545,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	12,409,000		'		'	12,409,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	12,246,000		'		'	12,246,000
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Credit losses Recognized [Abstract]	'		'		'	'
Amount of Credit Losses Recognized in Current Period	-1,400,000		-1,000,000		-1,600,000	'
Commercial mortgage-backed securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	2,100,146,000		890,746,000		'	2,100,146,000
Available-for-sale Securities, Fair Value	2,055,804,000		895,075,000		'	2,055,804,000
Available-for-sale Securities, Gross Unrealized Gains	1,042,000	[1]	5,006,000	[2]	'	1,042,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-45,384,000	[1]	-677,000	[2]	'	-45,384,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis	0		'		'	0
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis	626,327,000		'		'	626,327,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Amortized Cost Basis	1,104,095,000		'		'	1,104,095,000
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis	369,724,000		'		'	369,724,000
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less Than One Year, Fair Value	0		'		'	0
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value	619,219,000		'		'	619,219,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value	1,073,471,000		'		'	1,073,471,000
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value	363,114,000		'		'	363,114,000
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield	0.00%		'		'	0.00%
Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield	1.22%		'		'	1.22%
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Nominal Yield	1.43%		'		'	1.43%
Available-for-sale Securities, Debt Maturities, Greater Than Ten Years, Nominal Yield	1.25%		'		'	1.25%
Available-for-sale Securities, Debt Maturities, Nominal Yield	1.34%		'		'	1.34%
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	9.41	[5]	'		'	9.41	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	123		8		'	123
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,800,717,000		275,065,000		'	1,800,717,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,286,000		0		'	2,286,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,803,003,000		275,065,000		'	1,803,003,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	45,302,000		677,000		'	45,302,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	82,000		0		'	82,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	45,384,000		677,000		'	45,384,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	2,100,146,000	[4]	'		'	2,100,146,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	2,055,804,000	[4]	'		'	2,055,804,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Other debt securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	35,061,000		35,680,000		'	35,061,000
Available-for-sale Securities, Fair Value	35,241,000		36,389,000		'	35,241,000
Available-for-sale Securities, Gross Unrealized Gains	368,000	[1]	709,000	[2]	'	368,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-188,000	[1]	0	[2]	'	-188,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Amortized Cost Basis	24,992,000		'		'	24,992,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis	5,169,000		'		'	5,169,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Amortized Cost Basis	0		'		'	0
Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis	4,900,000		'		'	4,900,000
Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less Than One Year, Fair Value	25,270,000		'		'	25,270,000
Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value	5,259,000		'		'	5,259,000
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value	0		'		'	0
Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value	4,712,000		'		'	4,712,000
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield	1.74%		'		'	1.74%
Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield	2.12%		'		'	2.12%
Available-for-sale Securities, Debt Maturities, Six to Ten Years, Nominal Yield	0.00%		'		'	0.00%
Available-for-sale Securities, Debt Maturities, Greater Than Ten Years, Nominal Yield	1.54%		'		'	1.54%
Available-for-sale Securities, Debt Maturities, Nominal Yield	1.77%		'		'	1.77%
Available-for-sale Securities, Debt Maturities, Weighted Average Maturity	5.31	[5]	'		'	5.31	[5]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	3		3		'	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,712,000		4,899,000		'	4,712,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,712,000		4,899,000		'	4,712,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	188,000		0		'	188,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	188,000		0		'	188,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	4,900,000		'		'	4,900,000
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	4,712,000		'		'	4,712,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	30,161,000		'		'	30,161,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	30,529,000		'		'	30,529,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Residential Mortgage-Backed Securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	7,934,370,000		9,973,552,000		'	7,934,370,000
Available-for-sale Securities, Fair Value	7,937,109,000		10,214,984,000		'	7,937,109,000
Available-for-sale Securities, Gross Unrealized Gains	114,073,000	[1]	246,910,000	[2]	'	114,073,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-108,892,000	[1]	-1,295,000	[2]	'	-108,892,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	-2,442,000	[3]	-4,183,000	[3]	'	-2,442,000	[3]
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Nominal Yield	1.90%	[8]	'		'	1.90%	[8]
Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities	'3 years 110 days		'		'	'3 years 110 days
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	174		35		'	174
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,404,822,000		161,828,000		'	4,404,822,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	30,774,000		131,159,000		'	30,774,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,435,596,000		292,987,000		'	4,435,596,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	110,357,000		1,161,000		'	110,357,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	977,000		4,317,000		'	977,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	111,334,000		5,478,000		'	111,334,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	7,720,189,000	[4]	'		'	7,720,189,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	7,716,010,000	[4]	'		'	7,716,010,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	214,181,000		'		'	214,181,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	221,099,000		'		'	221,099,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	7,720,189,000		9,650,650,000		'	7,720,189,000
Available-for-sale Securities, Fair Value	7,716,010,000		9,889,821,000		'	7,716,010,000
Available-for-sale Securities, Gross Unrealized Gains	104,713,000	[1]	240,332,000	[2]	'	104,713,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-108,892,000	[1]	-1,161,000	[2]	'	-108,892,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	158		12		'	158
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,379,137,000		161,828,000		'	4,379,137,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,379,137,000		161,828,000		'	4,379,137,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	108,892,000		1,161,000		'	108,892,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	108,892,000		1,161,000		'	108,892,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	7,720,189,000	[4]	'		'	7,720,189,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	7,716,010,000	[4]	'		'	7,716,010,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
U.S. agency residential mortgage-backed securities [Member] | Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	4,224,327,000		5,308,463,000		'	4,224,327,000
Available-for-sale Securities, Fair Value	4,232,332,000		5,453,549,000		'	4,232,332,000
Available-for-sale Securities, Gross Unrealized Gains	68,154,000	[1]	146,247,000	[2]	'	68,154,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-60,149,000	[1]	-1,161,000	[2]	'	-60,149,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	81		12		'	81
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,281,491,000		161,828,000		'	2,281,491,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,281,491,000		161,828,000		'	2,281,491,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	60,149,000		1,161,000		'	60,149,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	60,149,000		1,161,000		'	60,149,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	4,224,327,000	[4]	'		'	4,224,327,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	4,232,332,000	[4]	'		'	4,232,332,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
U.S. agency residential mortgage-backed securities [Member] | Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	2,308,341,000		2,978,608,000		'	2,308,341,000
Available-for-sale Securities, Fair Value	2,293,943,000		3,045,564,000		'	2,293,943,000
Available-for-sale Securities, Gross Unrealized Gains	25,813,000	[1]	66,956,000	[2]	'	25,813,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-40,211,000	[1]	0	[2]	'	-40,211,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	50		0		'	50
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,450,588,000		0		'	1,450,588,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,450,588,000		0		'	1,450,588,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	40,211,000		0		'	40,211,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	40,211,000		0		'	40,211,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	2,308,341,000	[4]	'		'	2,308,341,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	2,293,943,000	[4]	'		'	2,293,943,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
U.S. agency residential mortgage-backed securities [Member] | Government National Mortgage Association Certificates and Obligations (GNMA) [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	1,151,225,000		1,215,554,000		'	1,151,225,000
Available-for-sale Securities, Fair Value	1,152,128,000		1,237,041,000		'	1,152,128,000
Available-for-sale Securities, Gross Unrealized Gains	9,435,000	[1]	21,487,000	[2]	'	9,435,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-8,532,000	[1]	0	[2]	'	-8,532,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	27		0		'	27
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	647,058,000		0		'	647,058,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	647,058,000		0		'	647,058,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	8,532,000		0		'	8,532,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	8,532,000		0		'	8,532,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	1,151,225,000	[4]	'		'	1,151,225,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	1,152,128,000	[4]	'		'	1,152,128,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
U.S. agency residential mortgage-backed securities [Member] | Other [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	36,296,000		148,025,000		'	36,296,000
Available-for-sale Securities, Fair Value	37,607,000		153,667,000		'	37,607,000
Available-for-sale Securities, Gross Unrealized Gains	1,311,000	[1]	5,642,000	[2]	'	1,311,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	0	[1]	0	[2]	'	0	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	36,296,000	[4]	'		'	36,296,000	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	37,607,000	[4]	'		'	37,607,000	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	214,181,000		322,902,000		'	214,181,000
Available-for-sale Securities, Fair Value	221,099,000		325,163,000		'	221,099,000
Available-for-sale Securities, Gross Unrealized Gains	9,360,000	[1]	6,578,000	[2]	'	9,360,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	0	[1]	-134,000	[2]	'	0	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	-2,442,000	[3]	-4,183,000	[3]	'	-2,442,000	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	16	[9]	23	[10]	'	16	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	25,685,000	[9]	0	[10]	'	25,685,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	30,774,000	[9]	131,159,000	[10]	'	30,774,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	56,459,000	[9]	131,159,000	[10]	'	56,459,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,465,000	[9]	0	[10]	'	1,465,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	977,000	[9]	4,317,000	[10]	'	977,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	2,442,000	[9]	4,317,000	[10]	'	2,442,000	[9]
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	214,181,000		'		'	214,181,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	221,099,000		'		'	221,099,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Other Than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized in Earnings, Net, Qualitative Disclosures, Assumptions Used to Develop Projected Cash Flows [Abstract]	'		'		'	'
Unemployment rate	'Increasing to 7.3% over the next 12 months and remain at 7.3% thereafter		'Increasing to 8.5% over the next 12 months, dropping to 8% over the following 21 months and holding at 8% thereafter.		'	'
Housing price appreciation/depreciation	'Starting with current depreciated housing prices based on information derived from the FHFA1, appreciating 4% over the next 12 months, then flat for the following 12 months and then appreciating at 2% per year thereafter.	[11]	'Starting with current depreciated housing prices based on information derived from the FHFA1, depreciating 2% over the next 12 months, then flat for the following 12 months and then appreciating at 2% per year thereafter.	[11]	'	'
Estimated liquidation costs	'Reflect actual historical liquidations costs observed on Jumbo and Alt-A residential mortgage loans in securities owned by the Company.		'Reflect actual historical liquidations costs observed on Jumbo and Alt-A residential mortgage loans in securities owned by the Company.		'	'
Discount rates	'Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.		'Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.		'	'
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized in Earnings, Net Qualitative Disclosures, Privately Issued Mortgage-backed Securities [Abstract]	'		'		'	'
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Number of Securities	47		'		'	47
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Credit losses Recognized [Abstract]	'		'		'	'
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Number of Securities with Credit Losses In Current Period	4		'		'	45
Amount of Credit Losses Recognized in Current Period	938,000		-5,900,000		-21,900,000	67,346,000
Privately issued residential mortgage-backed securities [Member] | Alt A loans [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	104,559,000		124,314,000		'	104,559,000
Available-for-sale Securities, Fair Value	107,212,000		123,174,000		'	107,212,000
Available-for-sale Securities, Gross Unrealized Gains	4,386,000	[1]	1,440,000	[2]	'	4,386,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	0	[1]	0	[2]	'	0	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	-1,733,000	[3]	-2,580,000	[3]	'	-1,733,000	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	7	[9]	12	[10]	'	7	[9]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, OTTI Portion, Number of Positions	7		12		'	7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	11,043,000	[9]	0	[10]	'	11,043,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	30,774,000	[9]	87,907,000	[10]	'	30,774,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	41,817,000	[9]	87,907,000	[10]	'	41,817,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, OTTI Portion, Fair Value	11,043,000		0		'	11,043,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, OTTI Portion, Fair Value	30,774,000		87,907,000		'	30,774,000
Available-for-sale Securities, Continuous Unrealized Loss Position, OTTI Portion, Fair Value	41,817,000		87,907,000		'	41,817,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	756,000	[9]	0	[10]	'	756,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	977,000	[9]	2,580,000	[10]	'	977,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,733,000	[9]	2,580,000	[10]	'	1,733,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Losses	756,000		0		'	756,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, OTTI Portion, Accumulated Losses	977,000		2,580,000		'	977,000
Available-for-sale Securities, Continuous Unrealized Loss Position, OTTI Portion, Accumulated Losses	1,733,000		2,580,000		'	1,733,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	104,559,000		'		'	104,559,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	107,212,000		'		'	107,212,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized in Earnings, Net Qualitative Disclosures, Privately Issued Mortgage-backed Securities [Abstract]	'		'		'	'
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Number of Securities	16		'		'	16
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Credit losses Recognized [Abstract]	'		'		'	'
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Number of Securities with Credit Losses In Current Period	4		'		'	16
Amount of Credit Losses Recognized in Current Period	938,000		'		'	49,126,000
Privately issued residential mortgage-backed securities [Member] | Jumbo A Loans [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	109,622,000		198,588,000		'	109,622,000
Available-for-sale Securities, Fair Value	113,887,000		201,989,000		'	113,887,000
Available-for-sale Securities, Gross Unrealized Gains	4,974,000	[1]	5,138,000	[2]	'	4,974,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	0	[1]	-134,000	[2]	'	0	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	-709,000	[3]	-1,603,000	[3]	'	-709,000	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	9	[9]	11	[10]	'	9	[9]
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, OTTI Portion, Number of Positions	9		10		'	9
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	14,642,000	[9]	0	[10]	'	14,642,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	[9]	43,252,000	[10]	'	0	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	14,642,000	[9]	43,252,000	[10]	'	14,642,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, OTTI Portion, Fair Value	14,642,000		0		'	14,642,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, OTTI Portion, Fair Value	0		29,128,000		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, OTTI Portion, Fair Value	14,642,000		29,128,000		'	14,642,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	709,000	[9]	0	[10]	'	709,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	[9]	1,737,000	[10]	'	0	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	709,000	[9]	1,737,000	[10]	'	709,000	[9]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Losses	709,000		0		'	709,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, OTTI Portion, Accumulated Losses	0		1,602,000		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, OTTI Portion, Accumulated Losses	709,000		1,602,000		'	709,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	109,622,000		'		'	109,622,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	113,887,000		'		'	113,887,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized in Earnings, Net Qualitative Disclosures, Privately Issued Mortgage-backed Securities [Abstract]	'		'		'	'
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Number of Securities	31		'		'	31
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Credit losses Recognized [Abstract]	'		'		'	'
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Number of Securities with Credit Losses In Current Period	0		'		'	29
Amount of Credit Losses Recognized in Current Period	0		'		'	18,220,000
Perpetual Preferred, Equity Securities and Mutual Funds [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	41,240,000		'		'	41,240,000
Available-for-sale Securities, Fair Value	44,191,000		'		'	44,191,000
Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'	'
Available-for-sale Securities, Debt Maturities, Nominal Yield	1.33%		'		'	1.33%
Perpetual preferred stock [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	22,171,000		22,171,000		'	22,171,000
Available-for-sale Securities, Fair Value	22,863,000		25,072,000		'	22,863,000
Available-for-sale Securities, Gross Unrealized Gains	705,000	[1]	2,901,000	[2]	'	705,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-13,000	[1]	0	[2]	'	-13,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	1		0		'	1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	4,988,000		0		'	4,988,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,988,000		0		'	4,988,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	13,000		0		'	13,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	13,000		0		'	13,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	11,406,000		'		'	11,406,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	11,859,000		'		'	11,859,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	10,765,000		'		'	10,765,000
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	11,004,000		'		'	11,004,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	0		'		'	0
Equity securities and mutual funds [Member]	'		'		'	'
Schedule of Available-for-sale Securities [Line Items]	'		'		'	'
Available-for-sale Securities, Amortized Cost Basis	19,069,000		24,593,000		'	19,069,000
Available-for-sale Securities, Fair Value	21,328,000		27,557,000		'	21,328,000
Available-for-sale Securities, Gross Unrealized Gains	2,326,000	[1]	3,242,000	[2]	'	2,326,000	[1]
Available-for-sale Securities, Gross Unrealized Loss	-67,000	[1]	-278,000	[2]	'	-67,000	[1]
Available-for-Sale Securities, Other Than Temporary Impairments	0	[3]	0	[3]	'	0	[3]
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'	'
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	118		22		'	118
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	2,070,000		202,000		'	2,070,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		2,161,000		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,070,000		2,363,000		'	2,070,000
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'	'
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	67,000		1,000		'	67,000
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		277,000		'	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	67,000		278,000		'	67,000
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities, Portion Recognized In Earnings, Net Qualitative Disclosures, Lowest Current Credit Rating [Abstract]	'		'		'	'
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Amortized Cost	0	[4]	'		'	0	[4]
Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[4]	'		'	0	[4]
Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost	4,000		'		'	4,000
Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value	457,000		'		'	457,000
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value	0		'		'	0
Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost	19,065,000		'		'	19,065,000
Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value	20,871,000		'		'	20,871,000
Available-for-sale Securities, Privately Issued Residential Mortgage-backed Securities, Credit losses Recognized [Abstract]	'		'		'	'
Amount of Credit Losses Recognized in Current Period	$0		($457,000)		$0	'
[1]	Gross unrealized gain/loss recognized in AOCI in the consolidated balance sheet.
[2]	Gross unrealized gain/loss recognized in AOCI in the consolidated balance sheet
[3]	Amounts represent unrealized loss that remains in AOCI after an other-than-temporary credit loss has been recognized in income.
[4]	U.S. government and government sponsored enterprises are not rated by the nationally-recognized rating agencies as these securities are guaranteed by agencies of the U.S. government or government-sponsored enterprises.
[5]	Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.
[6]	Calculated on a taxable equivalent basis using a 39% effective tax rate.
[7]	Nominal yield on municipal and other tax-exempt securities and other debt securities with contractual maturity dates over ten years are based on variable rates which generally are reset within 35 days.
[8]	The nominal yield on mortgage-backed securities is based upon prepayment assumptions at the purchase date. Actual yields earned may differ significantly based upon actual prepayments. See Quarterly Financial Summary –– Unaudited following for current yields on available for sale securities portfolio.
[9]	Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:Alt-A loans 7 11,043 756 30,774 977 41,817 1,733Jumbo-A loans 9 14,642 709 — — 14,642 709
[10]	Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:Alt-A loans 12 $— $— $87,907 $2,580 $87,907 $2,580Jumbo-A loans 10 — — 29,128 1,602 29,128 1,602
[11]	Federal Housing Finance Agency

Otherthantemporary_Impairment_

Other-than-temporary Impairment (Details) (USD $)	12 Months Ended			60 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Beginning Balance	$75,228	$76,131	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	618	113	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	320	6,780	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	-3,589	0	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	-5,231	-7,796	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Ending Balance	67,346	75,228	'	67,346
Privately issued residential mortgage-backed securities [Member]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	-938	5,900	21,900	-67,346
Municipal and other tax-exempt securities [Member]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	1,400	1,000	1,600	'
Equity securities and mutual funds [Member]	'	'	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]	'	'	'	'
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	$0	$457	$0	'

Securities_Fair_Value_Option_S

Securities Fair Value Option Securities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Schedule of Fair Value Option Securities [Line Items]	'	'
Fair Value Option Securities, Fair Value	$167,125	$284,296
Fair Value Option Securities, Unrealized Gain or Loss	-8,169	4,770
U.S. agency residential mortgage-backed securities [Member]	'	'
Schedule of Fair Value Option Securities [Line Items]	'	'
Fair Value Option Securities, Fair Value	157,431	257,040
Fair Value Option Securities, Unrealized Gain or Loss	-8,378	3,314
Corporate debt securities [Member]	'	'
Schedule of Fair Value Option Securities [Line Items]	'	'
Fair Value Option Securities, Fair Value	0	26,486
Fair Value Option Securities, Unrealized Gain or Loss	0	1,409
Other debt securities [Member]	'	'
Schedule of Fair Value Option Securities [Line Items]	'	'
Fair Value Option Securities, Fair Value	9,694	770
Fair Value Option Securities, Unrealized Gain or Loss	$209	$47

Securities_Restricted_Equity_S

Securities Restricted Equity Securities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Restricted Equity Securities [Abstract]	'	'
Federal Reserve Bank Stock	$34	$34
Federal Home Loan Bank Stock	$51	$31

Derivatives_Fair_Value_of_Deri

Derivatives, Fair Value of Derivatives Contracts (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative contracts, net of cash margin, Assets, Fair Value	$265,012,000		$338,106,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185,000		283,589,000
Increase in cash margin obligation for derivative holdings with a decrease in credit rating from A1 to below investment grade	26,000,000		'
Not Designated as Hedging Instrument [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	13,812,049,000	[1]	16,188,105,000	[1]
Derivative Liabilities, Notional	13,974,098,000	[1]	16,547,182,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	351,683,000		404,875,000
Derivative Assets, Netting Adjustments	-77,746,000		-63,305,000
Derivative Assets, Net Fair Value Before Cash Collateral	273,937,000		341,570,000
Derivative Assets, Fair Value, Cash Collateral	-8,925,000		-3,464,000
Derivative contracts, net of cash margin, Assets, Fair Value	265,012,000		338,106,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	349,133,000		396,263,000
Derivative Liabilities, Netting Adjustments	-77,746,000		-63,305,000
Derivative Liabilities, Net Fair Value Before Cash Collateral	271,387,000		332,958,000
Derivative Liabilities, Fair Value, Cash Collateral	-24,202,000		-49,369,000
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185,000		283,589,000
Not Designated as Hedging Instrument [Member] | To-be-announced residential mortgage-backed securities [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	10,817,159,000	[1]	12,850,805,000	[1]
Derivative Liabilities, Notional	10,982,049,000	[1]	13,239,078,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	102,921,000		46,113,000
Derivative Assets, Netting Adjustments	-46,623,000		-15,656,000
Derivative Assets, Net Fair Value Before Cash Collateral	56,298,000		30,457,000
Derivative Assets, Fair Value, Cash Collateral	0		0
Derivative contracts, net of cash margin, Assets, Fair Value	56,298,000		30,457,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	99,830,000		43,064,000
Derivative Liabilities, Netting Adjustments	-46,623,000		-15,656,000
Derivative Liabilities, Net Fair Value Before Cash Collateral	53,207,000		27,408,000
Derivative Liabilities, Fair Value, Cash Collateral	0		-15,467,000
Derivative contracts, net of cash margin, Liabilities, Fair Value	53,207,000		11,941,000
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	1,283,379,000	[1]	1,319,827,000	[1]
Derivative Liabilities, Notional	1,283,379,000	[1]	1,319,827,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	44,124,000		72,201,000
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	44,124,000		72,201,000
Derivative Assets, Fair Value, Cash Collateral	-731,000		0
Derivative contracts, net of cash margin, Assets, Fair Value	43,393,000		72,201,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	44,377,000		72,724,000
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	44,377,000		72,724,000
Derivative Liabilities, Fair Value, Cash Collateral	-17,853,000		-31,945,000
Derivative contracts, net of cash margin, Liabilities, Fair Value	26,524,000		40,779,000
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	1,263,266,000	[1]	1,346,780,000	[1]
Derivative Liabilities, Notional	1,216,426,000	[1]	1,334,349,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	48,078,000		82,349,000
Derivative Assets, Netting Adjustments	-29,957,000		-44,485,000
Derivative Assets, Net Fair Value Before Cash Collateral	18,121,000		37,864,000
Derivative Assets, Fair Value, Cash Collateral	-2,575,000		-3,464,000
Derivative contracts, net of cash margin, Assets, Fair Value	15,546,000		34,400,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	46,095,000		83,654,000
Derivative Liabilities, Netting Adjustments	-29,957,000		-44,485,000
Derivative Liabilities, Net Fair Value Before Cash Collateral	16,138,000		39,169,000
Derivative Liabilities, Fair Value, Cash Collateral	-6,055,000		-1,769,000
Derivative contracts, net of cash margin, Liabilities, Fair Value	10,083,000		37,400,000
Not Designated as Hedging Instrument [Member] | Agricultural contracts [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	100,886,000	[1]	212,434,000	[1]
Derivative Liabilities, Notional	99,191,000	[1]	212,135,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	2,060,000		3,638,000
Derivative Assets, Netting Adjustments	-1,166,000		-3,164,000
Derivative Assets, Net Fair Value Before Cash Collateral	894,000		474,000
Derivative Assets, Fair Value, Cash Collateral	0		0
Derivative contracts, net of cash margin, Assets, Fair Value	894,000		474,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	2,009,000		3,571,000
Derivative Liabilities, Netting Adjustments	-1,166,000		-3,164,000
Derivative Liabilities, Net Fair Value Before Cash Collateral	843,000		407,000
Derivative Liabilities, Fair Value, Cash Collateral	0		-188,000
Derivative contracts, net of cash margin, Liabilities, Fair Value	843,000		219,000
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	136,543,000	[1]	180,318,000	[1]
Derivative Liabilities, Notional	135,237,000	[1]	179,852,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	136,543,000		180,318,000
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	136,543,000		180,318,000
Derivative Assets, Fair Value, Cash Collateral	-2,147,000		0
Derivative contracts, net of cash margin, Assets, Fair Value	134,396,000		180,318,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	135,237,000		179,852,000
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	135,237,000		179,852,000
Derivative Liabilities, Fair Value, Cash Collateral	-294,000		0
Derivative contracts, net of cash margin, Liabilities, Fair Value	134,943,000		179,852,000
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	210,816,000	[1]	211,941,000	[1]
Derivative Liabilities, Notional	210,816,000	[1]	211,941,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	17,957,000		12,593,000
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	17,957,000		12,593,000
Derivative Assets, Fair Value, Cash Collateral	-3,472,000		0
Derivative contracts, net of cash margin, Assets, Fair Value	14,485,000		12,593,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	17,957,000		12,593,000
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	17,957,000		12,593,000
Derivative Liabilities, Fair Value, Cash Collateral	0		0
Derivative contracts, net of cash margin, Liabilities, Fair Value	17,957,000		12,593,000
Not Designated as Hedging Instrument [Member] | Customer risk management programs [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	13,812,049,000	[1]	16,122,105,000	[1]
Derivative Liabilities, Notional	13,927,098,000	[1]	16,497,182,000	[1]
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	351,683,000		397,212,000
Derivative Assets, Netting Adjustments	-77,746,000		-63,305,000
Derivative Assets, Net Fair Value Before Cash Collateral	273,937,000		333,907,000
Derivative Assets, Fair Value, Cash Collateral	-8,925,000		-3,464,000
Derivative contracts, net of cash margin, Assets, Fair Value	265,012,000		330,443,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	345,505,000		395,458,000
Derivative Liabilities, Netting Adjustments	-77,746,000		-63,305,000
Derivative Liabilities, Net Fair Value Before Cash Collateral	267,759,000		332,153,000
Derivative Liabilities, Fair Value, Cash Collateral	-24,202,000		-49,369,000
Derivative contracts, net of cash margin, Liabilities, Fair Value	243,557,000		282,784,000
Not Designated as Hedging Instrument [Member] | Interest rate risk management program [Member]	'		'
Notional Amount of Derivatives [Abstract]	'		'
Derivative Assets, Notional	0	[1]	66,000,000	[1]
Derivative Liabilities, Notional	47,000,000	[1]	50,000,000	[1]
Derivative, Notional Amount	47,000,000		'
Derivative Assets, Fair Value, Net [Abstract]	'		'
Derivative Assets, Gross Fair Value	0		7,663,000
Derivative Assets, Netting Adjustments	0		0
Derivative Assets, Net Fair Value Before Cash Collateral	0		7,663,000
Derivative Assets, Fair Value, Cash Collateral	0		0
Derivative contracts, net of cash margin, Assets, Fair Value	0		7,663,000
Derivative Liabilities, Fair Value, Net [Abstract]	'		'
Derivative Liabilities, Fair Value, Gross Liability	3,628,000		805,000
Derivative Liabilities, Netting Adjustments	0		0
Derivative Liabilities, Net Fair Value Before Cash Collateral	3,628,000		805,000
Derivative Liabilities, Fair Value, Cash Collateral	0		0
Derivative contracts, net of cash margin, Liabilities, Fair Value	$3,628,000		$805,000
[1]	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

Loans_and_Allowances_for_Credi2

Loans and Allowances for Credit Losses Part 1 (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Loans receivables disclosure [Abstract]	'		'
Loans receivables with fixed rate of interest	$4,327,637,000		$5,657,343,000
Loans receivables with variable rate of interest	8,363,478,000		6,519,703,000
Loan receivable non-accrual	101,149,000		134,410,000
Total	12,792,264,000		12,311,456,000
Accruing loans past due (90 days)	1,415,000	[1]	3,925,000	[1]
Loans Receivable, Impaired, Foregone Interest on Nonaccrual Loans	5,361,000		8,587,000
Loans receivable, other information [Abstract]	'		'
Amount of total loan portfolio to businesses and individuals in Texas	4,300,000,000		4,000,000,000
Percentage of total loan portfolio to businesses and individuals in Texas (in hundredths)	34.00%		32.00%
Amount of total loan portfolio to businesses and individuals in Oklahoma	3,300,000,000		3,300,000,000
Percentage of total loan portfolio to businesses and individuals in Oklahoma (in hundredths)	26.00%		27.00%
Credit Commitments [Abstract]	'		'
Outstanding commitments to extend credit	7,100,000,000		'
Outstanding standby letters of credit	444,000,000		'
Outstanding commercial letters of credit	13,000,000		'
Commercial [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Loans receivables with fixed rate of interest	1,637,620,000		2,955,779,000
Loans receivables with variable rate of interest	6,288,841,000		4,661,666,000
Loan receivable non-accrual	16,760,000		24,467,000
Total	7,943,221,000		7,641,912,000
Loans receivable, other information [Abstract]	'		'
Amount of loan portfolio to businesses in Texas	2,800,000,000		2,600,000,000
Percentage of loan portfolio to businesses in Texas (in hundredths)	36.00%		34.00%
Amount of loan portfolio to businesses in Oklahoma	1,900,000,000		1,900,000,000
Percentage of loan portfolio to businesses in Oklahoma (in hundredths)	23.00%		25.00%
Energy [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Total	2,351,760,000		2,460,659,000
Loans receivable, other information [Abstract]	'		'
Percentage of energy loans in loan portfolio	18.00%		'
Amount of loans to energy producers	2,000,000,000		'
Percentage of committed energy production loans secured by oil	59.00%		'
Percentage of committed energy production loans secured by natural gas	41.00%		'
Services [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Total	2,282,210,000		2,164,186,000
Loans receivable, other information [Abstract]	'		'
Amount of loans with individual balances less than $10 million	1,100,000,000		993,000,000
Maximum loan amount for certain individual loans in category	10,000,000		10,000,000
Commercial Real Estate [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Loans receivables with fixed rate of interest	770,908,000		779,114,000
Loans receivables with variable rate of interest	1,603,595,000		1,389,259,000
Loan receivable non-accrual	40,850,000		60,626,000
Total	2,415,353,000		2,228,999,000
Loans receivable, other information [Abstract]	'		'
Percentage of loan portfolio secured by property in Texas (in hundredths)	31.00%		32.00%
Percentage of loan portfolio secured by property in Oklahoma (in hundredths)	19.00%		19.00%
Percentage of loan portfolio secured by property in New Mexico (in hundredths)	11.00%		13.00%
Residential Mortgage [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Loans receivables with fixed rate of interest	1,783,615,000		1,747,038,000
Loans receivables with variable rate of interest	226,092,000		251,394,000
Loan receivable non-accrual	42,319,000		46,608,000
Total	2,052,026,000		2,045,040,000
Loans receivable, other information [Abstract]	'		'
Percentage of loan portfolio secured by property in Texas (in hundredths)	27.00%		34.00%
Percentage of loan portfolio secured by property in Oklahoma (in hundredths)	38.00%		23.00%
Percentage of loan portfolio secured by property in New Mexico (in hundredths)	12.00%		17.00%
Percentage of loan portfolio secured by property in Colorado	10.00%		11.00%
Permanent Mortgage [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Total	1,062,744,000		1,123,965,000
Loans receivable, other information [Abstract]	'		'
Minimum FICO required for jumbo loan approval	720		'
Maximum debt-to-income ratio on jumbo loans (in hundredths)	38.00%		'
Minimum loan-to-value ratio on jumbo loans (in hundredths)	60.00%		'
Maximum loan-to-value ratio on jumbo loans (in hundredths)	100.00%		'
Minimum period for fixed rate on variable rate jumbo loans (in years)	'3 years		'
Maximum period for fixed rate on variable rate jumbo loans (in years)	'10 years		'
Permanent mortgages guaranteed by U.S. government agencies [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Total	181,598,000		160,444,000
Loans receivable, other information [Abstract]	'		'
Amount of loan portfolio guaranteed by US government previously sold into GNMA mortgage pools	182,000,000		160,000,000
Home equity	'		'
Loans receivables disclosure [Abstract]	'		'
Total	807,684,000		760,631,000
Loans receivable, other information [Abstract]	'		'
Percentage of home equity portfolio comprised of first lien loans	70.00%		68.00%
Percentage of home equity portfolio comprised of junior lien loans	30.00%		32.00%
Percentage of junior lien home equity loans that are amortizing term loans	74.00%		78.00%
Percentage of junior lien home equity loans that are revolving lines of credit	26.00%		22.00%
Home equity loans, description	'Home equity loans generally require a minimum FICO score of 700 and a maximum DTI of 40%.		'
Home equity loans, maximum	400,000		'
Home equity loans, revolving period	'5 years		'
Home equity loans, amortization period following revolving period	'15 years		'
Home equity loans, discretionary additional revolving period	'5 years		'
Consumer [Member]	'		'
Loans receivables disclosure [Abstract]	'		'
Loans receivables with fixed rate of interest	135,494,000		175,412,000
Loans receivables with variable rate of interest	244,950,000		217,384,000
Loan receivable non-accrual	1,220,000		2,709,000
Total	$381,664,000		$395,505,000
[1]	Excludes residential mortgage loans guaranteed by agencies of the U.S. government

Derivatives_Derivatives_Instru

Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) (Not Designated as Hedging Instrument [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	$12,380	$13,693	$5,314
Gain (Loss) on Derivatives, Net	-4,367	-301	2,526
To-be-announced residential mortgage-backed securities [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	42	1,070	-4,047
Gain (Loss) on Derivatives, Net	0	0	0
Interest rate swaps [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	2,991	3,458	3,193
Gain (Loss) on Derivatives, Net	0	0	0
Energy contracts [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	8,303	8,171	5,262
Gain (Loss) on Derivatives, Net	0	0	0
Agricultural contracts [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	357	382	341
Gain (Loss) on Derivatives, Net	0	0	0
Foreign exchange contracts [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	687	612	565
Gain (Loss) on Derivatives, Net	0	0	0
Equity option contracts [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	0	0	0
Gain (Loss) on Derivatives, Net	0	0	0
Customer risk management programs [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	12,380	13,693	5,314
Gain (Loss) on Derivatives, Net	0	0	0
Interest rate risk management program [Member]	'	'	'
Trading Activity, Gains and Losses, Net [Line Items]	'	'	'
Brokergage and Trading Revenue	0	0	0
Gain (Loss) on Derivatives, Net	($4,367)	($301)	$2,526

Loans_and_Allowances_for_Credi3

Loans and Allowances for Credit Losses Part 2 (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Allowance for loan losses [Roll Forward]	'	'		'
Beginning balance	$215,507,000	$253,481,000		$292,971,000
Provision for loan losses	-28,073,000	-14,654,000		-1,040,000
Loans charged off	-25,282,000	-42,138,000		-56,800,000
Recoveries	23,244,000	18,818,000		18,350,000
Ending balance	185,396,000	215,507,000		253,481,000
Accrual for off-balance sheet credit losses [Roll Forward]	'	'		'
Beginning balance	1,915,000	9,261,000		14,271,000
Provision for off-balance sheet credit risk	173,000	-7,346,000		-5,010,000
Ending balance	2,088,000	1,915,000		9,261,000
Total provision for credit losses	-27,900,000	-22,000,000		-6,050,000
Negative recovery related to invalidated settlement agreement	'	7,100,000		'
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	12,691,892,000	12,177,046,000		'
Individually measured for impairment, recorded investment	100,372,000	134,410,000		'
Total	12,792,264,000	12,311,456,000		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	156,229,000	167,087,000		'
Individually measured for impairment, related allowance	954,000	4,233,000		'
Total measured for impairment, related allowance	185,396,000	215,507,000		253,481,000
Commercial [Member]	'	'		'
Allowance for loan losses [Roll Forward]	'	'		'
Beginning balance	65,280,000	83,443,000		104,631,000
Provision for loan losses	12,747,000	-14,950,000		-13,830,000
Loans charged off	-6,335,000	-9,341,000		-14,836,000
Recoveries	7,488,000	6,128,000	[1]	7,478,000
Ending balance	79,180,000	65,280,000		83,443,000
Accrual for off-balance sheet credit losses [Roll Forward]	'	'		'
Beginning balance	475,000	7,906,000		13,456,000
Provision for off-balance sheet credit risk	-356,000	-7,431,000		-5,550,000
Ending balance	119,000	475,000		7,906,000
Total provision for credit losses	12,391,000	-22,381,000		-19,380,000
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	7,926,461,000	7,617,445,000		'
Individually measured for impairment, recorded investment	16,760,000	24,467,000		'
Total	7,943,221,000	7,641,912,000		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	78,607,000	65,050,000		'
Individually measured for impairment, related allowance	573,000	230,000		'
Total measured for impairment, related allowance	79,180,000	65,280,000		83,443,000
Commercial Real Estate [Member]	'	'		'
Allowance for loan losses [Roll Forward]	'	'		'
Beginning balance	54,884,000	67,034,000		98,709,000
Provision for loan losses	-16,886,000	-6,214,000		-18,482,000
Loans charged off	-5,845,000	-11,642,000		-15,973,000
Recoveries	9,420,000	5,706,000		2,780,000
Ending balance	41,573,000	54,884,000		67,034,000
Accrual for off-balance sheet credit losses [Roll Forward]	'	'		'
Beginning balance	1,353,000	1,250,000		443,000
Provision for off-balance sheet credit risk	523,000	103,000		807,000
Ending balance	1,876,000	1,353,000		1,250,000
Total provision for credit losses	-16,363,000	-6,111,000		-17,675,000
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	2,374,503,000	2,168,373,000		'
Individually measured for impairment, recorded investment	40,850,000	60,626,000		'
Total	2,415,353,000	2,228,999,000		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	41,440,000	51,775,000		'
Individually measured for impairment, related allowance	133,000	3,109,000		'
Total measured for impairment, related allowance	41,573,000	54,884,000		67,034,000
Residential Mortgage [Member]	'	'		'
Allowance for loan losses [Roll Forward]	'	'		'
Beginning balance	41,703,000	46,476,000		50,281,000
Provision for loan losses	-8,043,000	3,346,000		7,968,000
Loans charged off	-5,753,000	-10,047,000		-14,107,000
Recoveries	1,558,000	1,928,000		2,334,000
Ending balance	29,465,000	41,703,000		46,476,000
Accrual for off-balance sheet credit losses [Roll Forward]	'	'		'
Beginning balance	78,000	91,000		131,000
Provision for off-balance sheet credit risk	12,000	-13,000		-40,000
Ending balance	90,000	78,000		91,000
Total provision for credit losses	-8,031,000	3,333,000		7,928,000
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	2,010,483,000	1,998,432,000		'
Individually measured for impairment, recorded investment	41,543,000	46,608,000		'
Total	2,052,026,000	2,045,040,000		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	29,217,000	40,934,000		'
Individually measured for impairment, related allowance	248,000	769,000		'
Total measured for impairment, related allowance	29,465,000	41,703,000		46,476,000
Consumer [Member]	'	'		'
Allowance for loan losses [Roll Forward]	'	'		'
Beginning balance	9,453,000	10,178,000		12,614,000
Provision for loan losses	83,000	5,327,000		3,690,000
Loans charged off	-7,349,000	-11,108,000		-11,884,000
Recoveries	4,778,000	5,056,000		5,758,000
Ending balance	6,965,000	9,453,000		10,178,000
Accrual for off-balance sheet credit losses [Roll Forward]	'	'		'
Beginning balance	9,000	14,000		241,000
Provision for off-balance sheet credit risk	-6,000	-5,000		-227,000
Ending balance	3,000	9,000		14,000
Total provision for credit losses	77,000	5,322,000		3,463,000
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	380,445,000	392,796,000		'
Individually measured for impairment, recorded investment	1,219,000	2,709,000		'
Total	381,664,000	395,505,000		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	6,965,000	9,328,000		'
Individually measured for impairment, related allowance	0	125,000		'
Total measured for impairment, related allowance	6,965,000	9,453,000		10,178,000
Specific Allowance [Member]	'	'		'
Allowance for loan losses [Roll Forward]	'	'		'
Ending balance	157,183,000	171,320,000		'
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	12,691,892,000	12,177,046,000		'
Individually measured for impairment, recorded investment	100,372,000	134,410,000		'
Total	12,792,264,000	12,311,456,000		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	156,229,000	167,087,000		'
Individually measured for impairment, related allowance	954,000	4,233,000		'
Total measured for impairment, related allowance	157,183,000	171,320,000		'
Nonspecific allowance [Member]	'	'		'
Allowance for loan losses [Roll Forward]	'	'		'
Beginning balance	44,187,000	46,350,000		26,736,000
Provision for loan losses	-15,974,000	-2,163,000		19,614,000
Loans charged off	0	0		0
Recoveries	0	0		0
Ending balance	28,213,000	44,187,000		46,350,000
Accrual for off-balance sheet credit losses [Roll Forward]	'	'		'
Beginning balance	0	0		0
Provision for off-balance sheet credit risk	0	0		0
Ending balance	0	0		0
Total provision for credit losses	-15,974,000	-2,163,000		19,614,000
Recorded investment [Abstract]	'	'		'
Collectively measured for impairment, recorded investment	0	0		'
Individually measured for impairment, recorded investment	0	0		'
Total	0	0		'
Related allowance [Abstract]	'	'		'
Collectively measured for impairment, related allowance	0	0		'
Individually measured for impairment, related allowance	0	0		'
Total measured for impairment, related allowance	$28,213,000	$44,187,000		$46,350,000
[1]	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa invalidated by the Oklahoma Supreme Court.

Loans_and_Allowances_for_Credi4

Loans and Allowances for Credit Losses Part 3 (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	$10,789,740,000	$10,350,320,000	'	'
Non-Graded, Recorded Investment	2,002,524,000	1,961,136,000	'	'
Total, Recorded Investment	12,792,264,000	12,311,456,000	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	127,961,000	127,322,000	'	'
Non-Graded, Related Allowance	29,222,000	43,998,000	'	'
Total, Related Allowance	185,396,000	215,507,000	253,481,000	292,971,000
Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	10,650,784,000	10,111,255,000	'	'
Non-Graded, Recorded Investment	1,966,324,000	1,924,879,000	'	'
Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	74,007,000	140,912,000	'	'
Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	64,949,000	98,153,000	'	'
Non-Graded, Recorded Investment	36,200,000	36,257,000	'	'
Commercial [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	7,888,219,000	7,624,442,000	'	'
Non-Graded, Recorded Investment	55,002,000	17,470,000	'	'
Total, Recorded Investment	7,943,221,000	7,641,912,000	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	78,250,000	64,181,000	'	'
Non-Graded, Related Allowance	930,000	1,099,000	'	'
Total, Related Allowance	79,180,000	65,280,000	'	'
Commercial [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	7,841,108,000	7,533,757,000	'	'
Non-Graded, Recorded Investment	54,929,000	17,406,000	'	'
Commercial [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	30,424,000	66,282,000	'	'
Commercial [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	16,687,000	24,403,000	'	'
Non-Graded, Recorded Investment	73,000	64,000	'	'
Energy [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	2,351,760,000	2,460,659,000	'	'
Energy [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	2,347,519,000	2,448,954,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Energy [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	2,381,000	9,245,000	'	'
Energy [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	1,860,000	2,460,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Services [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	2,282,210,000	2,164,186,000	'	'
Services [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	2,265,984,000	2,119,734,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Services [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	11,304,000	32,362,000	'	'
Services [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	4,922,000	12,090,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Wholesale/retail [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	1,201,364,000	1,106,439,000	'	'
Wholesale/retail [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	1,191,791,000	1,093,413,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Wholesale/retail [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	2,604,000	9,949,000	'	'
Wholesale/retail [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	6,969,000	3,077,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Manufacturing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	391,751,000	348,484,000	'	'
Manufacturing [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	381,794,000	337,132,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Manufacturing [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	9,365,000	9,345,000	'	'
Manufacturing [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	592,000	2,007,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Healthcare [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	1,274,246,000	1,081,406,000	'	'
Healthcare [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	1,272,626,000	1,077,773,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Healthcare [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	34,000	467,000	'	'
Healthcare [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	1,586,000	3,166,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Integrated food services [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	150,494,000	191,106,000	'	'
Integrated food services [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	145,758,000	190,422,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Integrated food services [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	4,736,000	0	'	'
Integrated food services [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	684,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Other commercial and industrial [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	291,396,000	289,632,000	'	'
Other commercial and industrial [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	235,636,000	266,329,000	'	'
Non-Graded, Recorded Investment	54,929,000	17,406,000	'	'
Other commercial and industrial [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	4,914,000	'	'
Other commercial and industrial [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	758,000	919,000	'	'
Non-Graded, Recorded Investment	73,000	64,000	'	'
Commercial Real Estate [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	2,415,353,000	2,228,999,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Total, Recorded Investment	2,415,353,000	2,228,999,000	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	41,573,000	54,884,000	'	'
Non-Graded, Related Allowance	0	0	'	'
Total, Related Allowance	41,573,000	54,884,000	'	'
Commercial Real Estate [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	2,334,998,000	2,105,105,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Commercial Real Estate [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	39,505,000	63,268,000	'	'
Commercial Real Estate [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	40,850,000	60,626,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Residential construction and land development [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	206,258,000	253,093,000	'	'
Residential construction and land development [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	173,488,000	204,010,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Residential construction and land development [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	15,393,000	22,952,000	'	'
Residential construction and land development [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	17,377,000	26,131,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Retail [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	586,047,000	522,786,000	'	'
Retail [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	579,506,000	508,342,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Retail [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	1,684,000	6,327,000	'	'
Retail [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	4,857,000	8,117,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Office [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	411,499,000	427,872,000	'	'
Office [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	403,951,000	405,763,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Office [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	1,157,000	15,280,000	'	'
Office [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	6,391,000	6,829,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Multifamily [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	576,502,000	402,896,000	'	'
Multifamily [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	562,800,000	393,566,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Multifamily [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	13,695,000	6,624,000	'	'
Multifamily [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	7,000	2,706,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Industrial [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	243,877,000	245,994,000	'	'
Industrial [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	243,625,000	241,761,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Industrial [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	265,000	'	'
Industrial [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	252,000	3,968,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Other commercial real estate [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	391,170,000	376,358,000	'	'
Other commercial real estate [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	371,628,000	351,663,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Other commercial real estate [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	7,576,000	11,820,000	'	'
Other commercial real estate [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	11,966,000	12,875,000	'	'
Non-Graded, Recorded Investment	0	0	'	'
Residential Mortgage [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	220,635,000	265,503,000	'	'
Non-Graded, Recorded Investment	1,831,391,000	1,779,537,000	'	'
Total, Recorded Investment	2,052,026,000	2,045,040,000	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	5,481,000	5,270,000	'	'
Non-Graded, Related Allowance	23,984,000	36,433,000	'	'
Total, Related Allowance	29,465,000	41,703,000	'	'
Residential Mortgage [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	210,142,000	242,823,000	'	'
Non-Graded, Recorded Investment	1,796,281,000	1,745,338,000	'	'
Residential Mortgage [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	3,283,000	10,271,000	'	'
Residential Mortgage [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	7,210,000	12,409,000	'	'
Non-Graded, Recorded Investment	35,110,000	34,199,000	'	'
Permanent Mortgage [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	1,062,744,000	1,123,965,000	'	'
Permanent Mortgage [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	210,142,000	242,823,000	'	'
Non-Graded, Recorded Investment	815,040,000	831,008,000	'	'
Permanent Mortgage [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	3,283,000	10,271,000	'	'
Permanent Mortgage [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	7,210,000	12,409,000	'	'
Non-Graded, Recorded Investment	27,069,000	27,454,000	'	'
Permanent mortgages guaranteed by U.S. government agencies [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	181,598,000	160,444,000	'	'
Permanent mortgages guaranteed by U.S. government agencies [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	180,821,000	159,955,000	'	'
Permanent mortgages guaranteed by U.S. government agencies [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Permanent mortgages guaranteed by U.S. government agencies [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	777,000	489,000	'	'
Home equity	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	807,684,000	760,631,000	'	'
Home equity | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	800,420,000	754,375,000	'	'
Home equity | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Home equity | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	7,264,000	6,256,000	'	'
Consumer [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	265,533,000	231,376,000	'	'
Non-Graded, Recorded Investment	116,131,000	164,129,000	'	'
Total, Recorded Investment	381,664,000	395,505,000	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	2,657,000	2,987,000	'	'
Non-Graded, Related Allowance	4,308,000	6,466,000	'	'
Total, Related Allowance	6,965,000	9,453,000	'	'
Consumer [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	264,536,000	229,570,000	'	'
Non-Graded, Recorded Investment	115,114,000	162,135,000	'	'
Consumer [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	795,000	1,091,000	'	'
Consumer [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	202,000	715,000	'	'
Non-Graded, Recorded Investment	1,017,000	1,994,000	'	'
Indirect automobile [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	6,513,000	34,735,000	'	'
Indirect automobile [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	5,796,000	33,157,000	'	'
Indirect automobile [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Indirect automobile [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	717,000	1,578,000	'	'
Other consumer [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Total, Recorded Investment	375,151,000	360,770,000	'	'
Other consumer [Member] | Performing [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	264,536,000	229,570,000	'	'
Non-Graded, Recorded Investment	109,318,000	128,978,000	'	'
Other consumer [Member] | Potential Problem [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	795,000	1,091,000	'	'
Other consumer [Member] | Nonaccrual [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	202,000	715,000	'	'
Non-Graded, Recorded Investment	300,000	416,000	'	'
Specific Allowance [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	10,789,740,000	10,350,320,000	'	'
Non-Graded, Recorded Investment	2,002,524,000	1,961,136,000	'	'
Total, Recorded Investment	12,792,264,000	12,311,456,000	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	127,961,000	127,322,000	'	'
Non-Graded, Related Allowance	29,222,000	43,998,000	'	'
Total, Related Allowance	157,183,000	171,320,000	'	'
Nonspecific allowance [Member]	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'
Internally Risk Graded, Recorded Investment	0	0	'	'
Non-Graded, Recorded Investment	0	0	'	'
Total, Recorded Investment	0	0	'	'
Related Allowance [Abstract]	'	'	'	'
Internally Risk Graded, Related Allowance	0	0	'	'
Non-Graded, Related Allowance	0	0	'	'
Total, Related Allowance	$28,213,000	$44,187,000	$46,350,000	$26,736,000

Loans_and_Allowances_for_Credi5

Loans and Allowances for Credit Losses Part 4 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	$319,534		$360,258
Impaired loans, recorded investment, total	281,970		294,365
Impaired loans, recorded investment with no related allowance	279,827		283,039
Impaired loans, recorded investment with related allowance	2,143		11,326
Impaired loans, related allowance	954		4,233
Impaired loans, average recorded investment	282,658		341,335
Impaired loans, interest income recognized	8,543		8,308
Commercial Loan [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	30,826		43,230
Impaired loans, recorded investment, total	16,760		24,467
Impaired loans, recorded investment with no related allowance	15,549		23,140
Impaired loans, recorded investment with related allowance	1,211		1,327
Impaired loans, related allowance	573		230
Impaired loans, average recorded investment	20,614		46,640
Impaired loans, interest income recognized	0		0
Energy [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	1,860		2,460
Impaired loans, recorded investment, total	1,860		2,460
Impaired loans, recorded investment with no related allowance	1,860		2,460
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	2,160		1,398
Impaired loans, interest income recognized	0		0
Services [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	6,486		15,715
Impaired loans, recorded investment, total	4,922		12,090
Impaired loans, recorded investment with no related allowance	3,791		11,940
Impaired loans, recorded investment with related allowance	1,131		150
Impaired loans, related allowance	516		149
Impaired loans, average recorded investment	8,506		14,529
Impaired loans, interest income recognized	0		0
Wholesale/retail [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	11,009		9,186
Impaired loans, recorded investment, total	6,969		3,077
Impaired loans, recorded investment with no related allowance	6,937		3,016
Impaired loans, recorded investment with related allowance	32		61
Impaired loans, related allowance	9		15
Impaired loans, average recorded investment	5,023		12,129
Impaired loans, interest income recognized	0		0
Manufacturing [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	746		2,447
Impaired loans, recorded investment, total	592		2,007
Impaired loans, recorded investment with no related allowance	592		2,007
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	1,300		12,529
Impaired loans, interest income recognized	0		0
Healthcare [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	2,193		4,256
Impaired loans, recorded investment, total	1,586		3,166
Impaired loans, recorded investment with no related allowance	1,538		2,050
Impaired loans, recorded investment with related allowance	48		1,116
Impaired loans, related allowance	48		66
Impaired loans, average recorded investment	2,376		4,326
Impaired loans, interest income recognized	0		0
Integrated food services [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	0		684
Impaired loans, recorded investment, total	0		684
Impaired loans, recorded investment with no related allowance	0		684
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	342		342
Impaired loans, interest income recognized	0		0
Other commercial and industrial [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	8,532		8,482
Impaired loans, recorded investment, total	831		983
Impaired loans, recorded investment with no related allowance	831		983
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	907		1,387
Impaired loans, interest income recognized	0		0
Commercial Real Estate [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	49,637		86,001
Impaired loans, recorded investment, total	40,850		60,626
Impaired loans, recorded investment with no related allowance	40,328		53,051
Impaired loans, recorded investment with related allowance	522		7,575
Impaired loans, related allowance	133		3,109
Impaired loans, average recorded investment	50,739		79,911
Impaired loans, interest income recognized	0		0
Residential construction and land development [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	20,804		44,721
Impaired loans, recorded investment, total	17,377		26,131
Impaired loans, recorded investment with no related allowance	17,050		25,575
Impaired loans, recorded investment with related allowance	327		556
Impaired loans, related allowance	107		155
Impaired loans, average recorded investment	21,754		44,003
Impaired loans, interest income recognized	0		0
Retail [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	6,133		9,797
Impaired loans, recorded investment, total	4,857		8,117
Impaired loans, recorded investment with no related allowance	4,857		8,117
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	6,487		7,490
Impaired loans, interest income recognized	0		0
Office [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	7,848		8,949
Impaired loans, recorded investment, total	6,391		6,829
Impaired loans, recorded investment with no related allowance	6,383		6,604
Impaired loans, recorded investment with related allowance	8		225
Impaired loans, related allowance	8		21
Impaired loans, average recorded investment	6,610		9,143
Impaired loans, interest income recognized	0		0
Multifamily [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	7		3,189
Impaired loans, recorded investment, total	7		2,706
Impaired loans, recorded investment with no related allowance	7		2,706
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	1,357		3,110
Impaired loans, interest income recognized	0		0
Industrial [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	252		3,968
Impaired loans, recorded investment, total	252		3,968
Impaired loans, recorded investment with no related allowance	252		0
Impaired loans, recorded investment with related allowance	0		3,968
Impaired loans, related allowance	0		2,290
Impaired loans, average recorded investment	2,110		1,984
Impaired loans, interest income recognized	0		0
Other commercial real estate [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	14,593		15,377
Impaired loans, recorded investment, total	11,966		12,875
Impaired loans, recorded investment with no related allowance	11,779		10,049
Impaired loans, recorded investment with related allowance	187		2,826
Impaired loans, related allowance	18		643
Impaired loans, average recorded investment	12,421		14,181
Impaired loans, interest income recognized	0		0
Residential Mortgage [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	237,843		228,149
Impaired loans, recorded investment, total	223,141		206,563
Impaired loans, recorded investment with no related allowance	222,731		204,264
Impaired loans, recorded investment with related allowance	410		2,299
Impaired loans, related allowance	248		769
Impaired loans, average recorded investment	209,340		211,672
Impaired loans, interest income recognized	8,543		8,308
Permanent Mortgage [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	41,870		51,153
Impaired loans, recorded investment, total	34,279		39,863
Impaired loans, recorded investment with no related allowance	33,869		37,564
Impaired loans, recorded investment with related allowance	410		2,299
Impaired loans, related allowance	248		769
Impaired loans, average recorded investment	37,071		32,614
Impaired loans, interest income recognized	1,582		1,590
Permanent mortgages guaranteed by U.S. government agencies [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	188,436	[1]	170,740	[2]
Impaired loans, recorded investment, total	181,598	[1]	160,444	[2]
Impaired loans, recorded investment with no related allowance	181,598	[1]	160,444	[2]
Impaired loans, recorded investment with related allowance	0	[1]	0	[2]
Impaired loans, related allowance	0	[1]	0	[2]
Impaired loans, average recorded investment	165,509	[1]	173,729	[2]
Impaired loans, interest income recognized	6,961	[1]	6,718	[2]
Home equity	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	7,537		6,256
Impaired loans, recorded investment, total	7,264		6,256
Impaired loans, recorded investment with no related allowance	7,264		6,256
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	6,760		5,329
Impaired loans, interest income recognized	0		0
Consumer Loan [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	1,228		2,878
Impaired loans, recorded investment, total	1,219		2,709
Impaired loans, recorded investment with no related allowance	1,219		2,584
Impaired loans, recorded investment with related allowance	0		125
Impaired loans, related allowance	0		125
Impaired loans, average recorded investment	1,965		3,112
Impaired loans, interest income recognized	0		0
Indirect automobile [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	719		1,578
Impaired loans, recorded investment, total	717		1,578
Impaired loans, recorded investment with no related allowance	717		1,578
Impaired loans, recorded investment with related allowance	0		0
Impaired loans, related allowance	0		0
Impaired loans, average recorded investment	1,148		1,886
Impaired loans, interest income recognized	0		0
Other consumer [Member]	'		'
Impaired loans [Abstract]	'		'
Impaired loans, unpaid principal balance	509		1,300
Impaired loans, recorded investment, total	502		1,131
Impaired loans, recorded investment with no related allowance	502		1,006
Impaired loans, recorded investment with related allowance	0		125
Impaired loans, related allowance	0		125
Impaired loans, average recorded investment	817		1,226
Impaired loans, interest income recognized	$0		$0
[1]	1 All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2013, $777 thousand of these loans are nonaccruing and $181 million are accruing based on the guarantee by U.S. government agencies.
[2]	1 All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2012, $489 thousand of these loans are nonaccruing and $160 million are accruing based on the guarantee by U.S. government agencies.

Loans_and_Allowances_for_Credi6

Loans and Allowances for Credit Losses Part 5 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	$106,281	$97,985
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	42,343	48,126
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	63,938	49,859
Troubled Debt Restructuring, Specific allowance	441	273
Troubled Debt Restructuring, Charge-offs	1,481	5,525
Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	54,322	38,515
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	13,384	8,755
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	40,938	29,760
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	51,959	59,470
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	28,959	39,371
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	23,000	20,099
Troubled Debt Restructuring, Specific allowance	441	273
Troubled Debt Restructuring, Charge-offs	1,481	5,525
Commercial Loan [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	3,632	5,521
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,114	3,525
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	2,518	1,996
Troubled Debt Restructuring, Specific allowance	246	60
Troubled Debt Restructuring, Charge-offs	154	107
Energy [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Services [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	2,235	2,492
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	852	2,099
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	1,383	393
Troubled Debt Restructuring, Specific allowance	237	45
Troubled Debt Restructuring, Charge-offs	0	0
Wholesale/retail [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	235	2,290
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	89	1,362
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	146	928
Troubled Debt Restructuring, Specific allowance	9	15
Troubled Debt Restructuring, Charge-offs	0	107
Manufacturing [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	391	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	391	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	154	0
Healthcare [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	0	64
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	64
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Integrated food services [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Other commercial and industrial [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	771	675
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	173	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	598	675
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Commercial Real Estate [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	24,577	30,599
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	11,342	21,043
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	13,235	9,556
Troubled Debt Restructuring, Specific allowance	107	76
Troubled Debt Restructuring, Charge-offs	745	3,744
Residential construction and land development [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	10,148	14,898
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,444	9,989
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	8,704	4,909
Troubled Debt Restructuring, Specific allowance	107	76
Troubled Debt Restructuring, Charge-offs	46	1,143
Retail [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	4,359	6,785
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	3,141	5,735
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	1,218	1,050
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	582	150
Office [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	5,059	3,899
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	3,872	1,920
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	1,187	1,979
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	117	269
Multifamily [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Industrial [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Other commercial real estate [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	5,011	5,017
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	2,885	3,399
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	2,126	1,618
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	2,182
Residential Mortgage [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	22,742	20,490
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	15,745	12,214
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	6,997	8,276
Troubled Debt Restructuring, Specific allowance	88	54
Troubled Debt Restructuring, Charge-offs	581	1,476
Permanent Mortgage [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Permanent Mortgage [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	18,697	20,490
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	12,214	12,214
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	6,483	8,276
Troubled Debt Restructuring, Specific allowance	88	54
Troubled Debt Restructuring, Charge-offs	469	1,476
Permanent mortgages guaranteed by U.S. government agencies [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	54,322	38,515
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	13,384	8,755
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	40,938	29,760
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	0	0
Home equity | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	4,045	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	3,531	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	514	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	112	0
Consumer Loan [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	1,008	2,860
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	758	2,589
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	250	271
Troubled Debt Restructuring, Specific allowance	0	83
Troubled Debt Restructuring, Charge-offs	1	198
Indirect automobile [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	629	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	555	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	74	0
Troubled Debt Restructuring, Specific allowance	0	0
Troubled Debt Restructuring, Charge-offs	1	0
Other consumer [Member] | Nonaccrual [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Troubled Debt Restructuring, Recorded Investment	379	2,860
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	203	2,589
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	176	271
Troubled Debt Restructuring, Specific allowance	0	83
Troubled Debt Restructuring, Charge-offs	$0	$198

Loans_and_Allowances_for_Credi7

Loans and Allowances for Credit Losses Part 6 (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	$36,021	$41,135
Troubled Debt Restructurings, Recorded Balance With Payment Default	30,706	27,894
Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	24,063	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	23,918	17,251
Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	11,545	'
Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	12,518	17,398
Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	11,958	23,737
Troubled Debt Restructurings, Recorded Balance With Payment Default	6,788	10,643
Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	214	8,145
Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	6,355	10,502
Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	5,389	5,090
Commercial Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,667	1,824
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,635	1,760
Commercial Loan [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Commercial Loan [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Commercial Loan [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Commercial Loan [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,667	1,824
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,635	1,760
Commercial Loan [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	139	1,760
Commercial Loan [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,471	0
Commercial Loan [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	57	64
Energy [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Energy [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Energy [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Energy [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Energy [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Energy [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Energy [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Energy [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Services [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,080	875
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,080	875
Services [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Services [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Services [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Services [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,080	875
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,080	875
Services [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	875
Services [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,080	0
Services [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Wholesale/retail [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	885
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	885
Wholesale/retail [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Wholesale/retail [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Wholesale/retail [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Wholesale/retail [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	885
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	885
Wholesale/retail [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	885
Wholesale/retail [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Wholesale/retail [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Manufacturing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	391	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	391	0
Manufacturing [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Manufacturing [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Manufacturing [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Manufacturing [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	391	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	391	0
Manufacturing [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Manufacturing [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	391	0
Manufacturing [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Healthcare [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	64
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Healthcare [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Healthcare [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Healthcare [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Healthcare [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	64
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Healthcare [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Healthcare [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Healthcare [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	64
Integrated food services [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Integrated food services [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Integrated food services [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Integrated food services [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Integrated food services [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Integrated food services [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Integrated food services [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Integrated food services [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other commercial and industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	196	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	164	0
Other commercial and industrial [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Other commercial and industrial [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Other commercial and industrial [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other commercial and industrial [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	196	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	164	0
Other commercial and industrial [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	139	0
Other commercial and industrial [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other commercial and industrial [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	57	0
Commercial Real Estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	3,822	15,450
Troubled Debt Restructurings, Recorded Balance With Payment Default	3,822	5,729
Commercial Real Estate [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Commercial Real Estate [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Commercial Real Estate [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Commercial Real Estate [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	3,822	15,450
Troubled Debt Restructurings, Recorded Balance With Payment Default	3,822	5,729
Commercial Real Estate [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	4,948
Commercial Real Estate [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	3,822	10,502
Commercial Real Estate [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Residential construction and land development [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	9,578
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	2,000
Residential construction and land development [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Residential construction and land development [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Residential construction and land development [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Residential construction and land development [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	9,578
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	2,000
Residential construction and land development [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	1,219
Residential construction and land development [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	8,359
Residential construction and land development [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Retail [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	486	2,379
Troubled Debt Restructurings, Recorded Balance With Payment Default	486	2,379
Retail [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Retail [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Retail [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Retail [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	486	2,379
Troubled Debt Restructurings, Recorded Balance With Payment Default	486	2,379
Retail [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	2,379
Retail [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	486	0
Retail [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Office [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,819	1,920
Troubled Debt Restructurings, Recorded Balance With Payment Default	2,819	1,350
Office [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Office [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Office [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Office [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,819	1,920
Troubled Debt Restructurings, Recorded Balance With Payment Default	2,819	1,350
Office [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	1,350
Office [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,819	570
Office [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Multifamily [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Multifamily [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Multifamily [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Multifamily [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Multifamily [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Multifamily [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Multifamily [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Multifamily [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Industrial [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Industrial [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Industrial [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Industrial [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Industrial [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Industrial [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Industrial [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Industrial [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other commercial real estate [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	517	1,573
Troubled Debt Restructurings, Recorded Balance With Payment Default	517	0
Other commercial real estate [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Other commercial real estate [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Other commercial real estate [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other commercial real estate [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	517	1,573
Troubled Debt Restructurings, Recorded Balance With Payment Default	517	0
Other commercial real estate [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other commercial real estate [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	517	1,573
Other commercial real estate [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Residential Mortgage [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	29,819	21,130
Troubled Debt Restructurings, Recorded Balance With Payment Default	25,094	19,943
Residential Mortgage [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	24,063	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	23,918	17,251
Residential Mortgage [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	11,545	'
Residential Mortgage [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	12,518	17,398
Residential Mortgage [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	5,756	3,732
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,176	2,692
Residential Mortgage [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	1,214
Residential Mortgage [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,062	0
Residential Mortgage [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	4,694	2,518
Permanent Mortgage [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,956	3,732
Troubled Debt Restructurings, Recorded Balance With Payment Default	586	2,692
Permanent Mortgage [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Permanent Mortgage [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Permanent Mortgage [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Permanent Mortgage [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,956	3,732
Troubled Debt Restructurings, Recorded Balance With Payment Default	586	2,692
Permanent Mortgage [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	1,214
Permanent Mortgage [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,062	0
Permanent Mortgage [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,894	2,518
Permanent mortgages guaranteed by U.S. government agencies [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	24,063	17,398
Troubled Debt Restructurings, Recorded Balance With Payment Default	23,918	17,251
Permanent mortgages guaranteed by U.S. government agencies [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	24,063	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	23,918	17,251
Permanent mortgages guaranteed by U.S. government agencies [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	11,545	'
Permanent mortgages guaranteed by U.S. government agencies [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	12,518	17,398
Permanent mortgages guaranteed by U.S. government agencies [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Permanent mortgages guaranteed by U.S. government agencies [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Permanent mortgages guaranteed by U.S. government agencies [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Permanent mortgages guaranteed by U.S. government agencies [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Home equity	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,800	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	590	0
Home equity | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Home equity | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Home equity | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Home equity | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,800	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	590	0
Home equity | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Home equity | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Home equity | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,800	0
Consumer Loan [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	713	2,731
Troubled Debt Restructurings, Recorded Balance With Payment Default	155	462
Consumer Loan [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Consumer Loan [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Consumer Loan [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Consumer Loan [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	713	2,731
Troubled Debt Restructurings, Recorded Balance With Payment Default	155	462
Consumer Loan [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	75	223
Consumer Loan [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Consumer Loan [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	638	2,508
Indirect automobile [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	510	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	115	0
Indirect automobile [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Indirect automobile [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Indirect automobile [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Indirect automobile [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	510	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	115	0
Indirect automobile [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Indirect automobile [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Indirect automobile [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	510	0
Other consumer [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	203	2,731
Troubled Debt Restructurings, Recorded Balance With Payment Default	40	462
Other consumer [Member] | Accruing [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0
Other consumer [Member] | Accruing [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	'
Other consumer [Member] | Accruing [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other consumer [Member] | Nonaccrual [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	203	2,731
Troubled Debt Restructurings, Recorded Balance With Payment Default	40	462
Other consumer [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	75	223
Other consumer [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0
Other consumer [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	$128	$2,508

Loans_and_Allowances_for_Credi8

Loans and Allowances for Credit Losses Part 7 (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	$12,509,986,000	$12,014,834,000
Past due 30 to 89 days	38,099,000	37,938,000
Past due 90 days or more	143,030,000	124,274,000
Nonaccrual	101,149,000	134,410,000
Total	12,792,264,000	12,311,456,000
Commercial [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	7,922,000,000	7,611,023,000
Past due 30 to 89 days	4,112,000	5,994,000
Past due 90 days or more	349,000	428,000
Nonaccrual	16,760,000	24,467,000
Total	7,943,221,000	7,641,912,000
Energy [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	2,347,267,000	2,454,928,000
Past due 30 to 89 days	2,483,000	3,071,000
Past due 90 days or more	150,000	200,000
Nonaccrual	1,860,000	2,460,000
Total	2,351,760,000	2,460,659,000
Services [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	2,276,036,000	2,150,386,000
Past due 30 to 89 days	1,210,000	1,710,000
Past due 90 days or more	42,000	0
Nonaccrual	4,922,000	12,090,000
Total	2,282,210,000	2,164,186,000
Wholesale/retail [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	1,193,905,000	1,103,307,000
Past due 30 to 89 days	338,000	5,000
Past due 90 days or more	152,000	50,000
Nonaccrual	6,969,000	3,077,000
Total	1,201,364,000	1,106,439,000
Manufacturing [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	391,159,000	346,442,000
Past due 30 to 89 days	0	35,000
Past due 90 days or more	0	0
Nonaccrual	592,000	2,007,000
Total	391,751,000	348,484,000
Healthcare [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	1,272,660,000	1,077,022,000
Past due 30 to 89 days	0	1,040,000
Past due 90 days or more	0	178,000
Nonaccrual	1,586,000	3,166,000
Total	1,274,246,000	1,081,406,000
Integrated food services [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	150,494,000	190,416,000
Past due 30 to 89 days	0	6,000
Past due 90 days or more	0	0
Nonaccrual	0	684,000
Total	150,494,000	191,106,000
Other commercial and industrial [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	290,479,000	288,522,000
Past due 30 to 89 days	81,000	127,000
Past due 90 days or more	5,000	0
Nonaccrual	831,000	983,000
Total	291,396,000	289,632,000
Commercial Real Estate [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	2,370,684,000	2,159,287,000
Past due 30 to 89 days	2,788,000	5,657,000
Past due 90 days or more	1,031,000	3,429,000
Nonaccrual	40,850,000	60,626,000
Total	2,415,353,000	2,228,999,000
Residential construction and land development [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	188,434,000	226,962,000
Past due 30 to 89 days	428,000	0
Past due 90 days or more	19,000	0
Nonaccrual	17,377,000	26,131,000
Total	206,258,000	253,093,000
Retail [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	580,926,000	514,252,000
Past due 30 to 89 days	264,000	349,000
Past due 90 days or more	0	68,000
Nonaccrual	4,857,000	8,117,000
Total	586,047,000	522,786,000
Office [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	404,505,000	417,866,000
Past due 30 to 89 days	603,000	3,177,000
Past due 90 days or more	0	0
Nonaccrual	6,391,000	6,829,000
Total	411,499,000	427,872,000
Multifamily [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	576,495,000	400,151,000
Past due 30 to 89 days	0	39,000
Past due 90 days or more	0	0
Nonaccrual	7,000	2,706,000
Total	576,502,000	402,896,000
Industrial [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	243,625,000	242,026,000
Past due 30 to 89 days	0	0
Past due 90 days or more	0	0
Nonaccrual	252,000	3,968,000
Total	243,877,000	245,994,000
Other commercial real estate [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	376,699,000	358,030,000
Past due 30 to 89 days	1,493,000	2,092,000
Past due 90 days or more	1,012,000	3,361,000
Nonaccrual	11,966,000	12,875,000
Total	391,170,000	376,358,000
Residential Mortgage [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	1,837,885,000	1,854,347,000
Past due 30 to 89 days	30,172,000	23,687,000
Past due 90 days or more	141,649,000	120,398,000
Nonaccrual	42,320,000	46,608,000
Total	2,052,026,000	2,045,040,000
Permanent Mortgage [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	1,018,670,000	1,075,687,000
Past due 30 to 89 days	9,795,000	8,366,000
Past due 90 days or more	0	49,000
Nonaccrual	34,279,000	39,863,000
Total	1,062,744,000	1,123,965,000
Permanent mortgages guaranteed by U.S. government agencies [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	21,916,000	26,560,000
Past due 30 to 89 days	17,290,000	13,046,000
Past due 90 days or more	141,615,000	120,349,000
Nonaccrual	777,000	489,000
Total	181,598,000	160,444,000
Home equity	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	797,299,000	752,100,000
Past due 30 to 89 days	3,087,000	2,275,000
Past due 90 days or more	34,000	0
Nonaccrual	7,264,000	6,256,000
Total	807,684,000	760,631,000
Consumer [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	379,417,000	390,177,000
Past due 30 to 89 days	1,027,000	2,600,000
Past due 90 days or more	1,000	19,000
Nonaccrual	1,219,000	2,709,000
Total	381,664,000	395,505,000
Indirect automobile [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	5,466,000	31,869,000
Past due 30 to 89 days	330,000	1,273,000
Past due 90 days or more	0	15,000
Nonaccrual	717,000	1,578,000
Total	6,513,000	34,735,000
Other consumer [Member]	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'
Current	373,951,000	358,308,000
Past due 30 to 89 days	697,000	1,327,000
Past due 90 days or more	1,000	4,000
Nonaccrual	502,000	1,131,000
Total	$375,151,000	$360,770,000

Premises_and_Equipment_Premise1

Premises and Equipment Premises and Equipment (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Premises and Equipment [Line Items]	'	'	'
Premises and Equipment, Gross	$594,698,000	$565,343,000	'
Premises and Equipment, Accumulated depreciation	316,849,000	299,423,000	'
Premises and Equipment, net	277,849,000	265,920,000	'
Depreciation Expense	30,000,000	33,000,000	32,000,000
Land [Member]	'	'	'
Premises and Equipment [Line Items]	'	'	'
Premises and Equipment, Gross	75,859,000	73,616,000	'
Building and improvements [Member]	'	'	'
Premises and Equipment [Line Items]	'	'	'
Premises and Equipment, Gross	221,326,000	214,116,000	'
Software [Member]	'	'	'
Premises and Equipment [Line Items]	'	'	'
Premises and Equipment, Gross	103,473,000	89,183,000	'
Furniture and equipment [Member]	'	'	'
Premises and Equipment [Line Items]	'	'	'
Premises and Equipment, Gross	163,013,000	158,020,000	'
Construction in progress [Member]	'	'	'
Premises and Equipment [Line Items]	'	'	'
Premises and Equipment, Gross	$31,027,000	$30,408,000	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets Acquisitions (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2013
				Series of Individually Immaterial Business Acquisitions [Member]	Series of Individually Immaterial Business Acquisitions [Member]
Business Acquisition [Line Items]	'	'	'	'	'
Business Acquisition, Cost of Acquired Entity, Purchase Price	'	'	'	$37,000,000	'
Business Acquisition, Cost of Acquired Entity, Cash Paid	'	'	'	24,000,000	'
Business Acquisition, Contingent Consideration, at Fair Value	'	'	'	13,000,000	'
Business Acquisition, Purchase Price Allocation, Intangible Assets Other than Goodwill	'	'	'	'	21,000,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount	$359,759,000	$361,979,000	$335,601,000	'	$29,000,000

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	$24,564	$28,192	'
Finite-Lived Intangible Assets-Future Amortization Expense [Abstract]	'	'	'
2013	2,722	'	'
2014	2,683	'	'
2015	2,537	'	'
2016	2,080	'	'
2017	1,595	'	'
Thereafter	12,947	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross	359,987	362,207	335,829
Goodwill, Accumulated Impairment	-228	-228	-228
Goodwill	359,759	361,979	335,601
Goodwill, Acquired During Period	'	26,378	'
Goodwill, Purchase Accounting Adjustments	-2,220	'	'
Commercial [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross	268,942	271,162	266,728
Goodwill, Accumulated Impairment	0	0	0
Goodwill	268,942	271,162	266,728
Goodwill, Acquired During Period	'	4,434	'
Goodwill, Purchase Accounting Adjustments	-2,220	'	'
Consumer [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross	39,251	39,251	39,251
Goodwill, Accumulated Impairment	-228	-228	-228
Goodwill	39,023	39,023	39,023
Goodwill, Acquired During Period	'	0	'
Goodwill, Purchase Accounting Adjustments	0	'	'
Wealth Management [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross	51,794	51,794	29,850
Goodwill, Accumulated Impairment	0	0	0
Goodwill	51,794	51,794	29,850
Goodwill, Acquired During Period	'	21,944	'
Goodwill, Purchase Accounting Adjustments	0	'	'
Arizona [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill	16,422	16,422	'
Colorado [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill	77,555	77,555	'
New Mexico	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill	15,273	15,273	'
Oklahoma [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill	10,387	12,607	'
Texas [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill	240,122	240,122	'
Core Deposits [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, gross	33,749	33,749	'
Accumulated amortization	32,656	32,180	'
Finite-lived intangible assets, net	1,093	1,569	'
Finite-Lived Intangible Assets-Future Amortization Expense [Abstract]	'	'	'
2013	432	'	'
2014	393	'	'
2015	247	'	'
2016	21	'	'
2017	0	'	'
Thereafter	0	'	'
Core Deposits [Member] | Arizona [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	0	0	'
Core Deposits [Member] | Colorado [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	277	377	'
Core Deposits [Member] | Texas [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	816	1,192	'
Other Intangible Assets [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, gross	37,992	38,191	'
Accumulated amortization	14,521	11,568	'
Finite-lived intangible assets, net	23,471	26,623	'
Finite-Lived Intangible Assets-Future Amortization Expense [Abstract]	'	'	'
2013	2,290	'	'
2014	2,290	'	'
2015	2,290	'	'
2016	2,059	'	'
2017	1,595	'	'
Thereafter	12,947	'	'
Other Intangible Assets [Member] | Colorado [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	13,482	15,976	'
Other Intangible Assets [Member] | Kansas/Missouri [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	790	790	'
Other Intangible Assets [Member] | Oklahoma [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Finite-lived intangible assets, net	$9,199	$9,857	'

Mortgage_Banking_Activities_Co

Mortgage Banking Activities, Components of Loans Held For Sale (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'
Components of Residential Mortgages Held For Sale Gross, Fair Value	$200,546	$293,762	'
Mortgage Banking Revenue [Abstract]	'	'	'
Total originating and marketing revenue	79,545	129,117	51,982
Servicing revenue	42,389	40,185	39,661
Mortgage banking revenue	121,934	169,302	91,643
Residential mortgage loans held for sale [Member]	'	'	'
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'
Number of days for past due for loan to be considered nonperforming (in days)	'90 days	'90 days	'
Residential mortgage loans held for sale, nonperforming	0	0	'
Credit losses recognized on residential mortgage loans held for sale	0	0	'
Residential mortgage loans held for sale, Unpaid Principal Balance	192,266	269,718	'
Components of Residential Mortgages Held For Sale Gross, Fair Value	193,584	281,935	'
Mortgage Banking Revenue [Abstract]	'	'	'
Total originating and marketing revenue	84,403	120,599	57,418
Residential mortgage loan commitments [Member]	'	'	'
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'
General number of days outstanding for residential mortgage commitments, minimum (in days)	'60 days	'60 days	'
General number of days outstanding for residential mortgage commitments, maximum (in days)	'90 days	'90 days	'
Residential mortgage, Derivative contracts, Notional	258,873	356,634	'
Components of Residential Mortgages Held For Sale Gross, Fair Value	2,656	12,733	'
Mortgage Banking Revenue [Abstract]	'	'	'
Total originating and marketing revenue	-10,070	6,136	4,345
Forward sales contracts[Member]	'	'	'
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'
General number of days for delivery of loans, for which the price is set by forward sales contracts, minimum (in days)	'60 days	'60 days	'
General number of days for delivery of loans, for which the price is set by forward sales contracts, maximum (in days)	'90 days	'90 days	'
Residential mortgage, Derivative contracts, Notional	435,867	598,442	'
Components of Residential Mortgages Held For Sale Gross, Fair Value	4,306	-906	'
Mortgage Banking Revenue [Abstract]	'	'	'
Total originating and marketing revenue	$5,212	$2,382	($9,781)

Mortgage_Banking_Activities_Mo1

Mortgage Banking Activities, Mortgage Servicing Rights (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of Mortgage Servicing Rights [Abstract]	'	'	'	'
Number of residential mortgage loans serviced	'	106,137	98,246	95,841
Outstanding principal balance of residential mortgage loans serviced for others	'	$13,718,942,000	$11,981,624,000	$11,300,986,000
Weighted average interest rate (in hundredths)	'	4.40%	4.71%	5.19%
Remaining term (in months)	'	'292 months	'289 days	'290 months
Servicing Asset at Fair Value, Amount [Roll Forward]	'	'	'	'
Beginning balance	115,723,000	100,812,000	86,783,000	115,723,000
Additions, net	'	49,431,000	42,191,000	26,251,000
Change in fair value due to loan runoff	'	-19,630,000	-18,952,000	-14,744,000
Change in fair value due to market changes	'	22,720,000	-9,210,000	-40,447,000
Ending balance	'	153,333,000	100,812,000	86,783,000
Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]	'	'	'	'
Discount rate - risk-free rate plus a market premium (in hundredths)	'	10.21%	10.29%	'
Prepayment rate - estimated based upon loan interest rate, original term and loan type, minimum (in hundredths)	'	6.66%	8.38%	'
Prepayment rate - estimated based upon loan interest rate, original term and loan type, maximum (in hundredths)	'	26.19%	43.94%	'
Loan servicing costs - annually per loan based upon loan type, Performing, minimum (in dollars per loan)	'	60	55	'
Loan servicing costs - annually per loan based upon loan type, Performing, maximum (in dollars per loan)	'	105	105	'
Loan servicing costs - annually per loan based upon loan type, Delinquent loans, Minimum (in dollars per loan)	'	150	135	'
Loan servicing costs - annually per loan based upon loan type, Delinquent loans, Maximum (in dollars per loan)	'	500	500	'
Loan servicing costs - annually per loan based upon loan type, Loans in foreclosure, Minimum (in dollars per loan)	'	1,000	875	'
Loan servicing costs - annually per loan based upon loan type, Loans in foreclosure, Maximum (in dollars per loan)	'	4,250	4,250	'
Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths)	'	1.80%	0.87%	'
Purchased [Member]	'	'	'	'
Servicing Asset at Fair Value, Amount [Roll Forward]	'	'	'	'
Beginning balance	37,900,000	12,976,000	18,903,000	37,900,000
Additions, net	'	0	0	0
Change in fair value due to loan runoff	'	-3,029,000	-4,164,000	-4,699,000
Change in fair value due to market changes	'	5,988,000	-1,763,000	-14,298,000
Ending balance	'	15,935,000	12,976,000	18,903,000
Originated [Member]	'	'	'	'
Servicing Asset at Fair Value, Amount [Roll Forward]	'	'	'	'
Beginning balance	77,823,000	87,836,000	67,880,000	77,823,000
Additions, net	'	49,431,000	42,191,000	26,251,000
Change in fair value due to loan runoff	'	-16,601,000	-14,788,000	-10,045,000
Change in fair value due to market changes	'	16,732,000	-7,447,000	-26,149,000
Ending balance	'	$137,398,000	$87,836,000	$67,880,000

Mortgage_Banking_Activities_Lo

Mortgage Banking Activities, Loan Servicing Portfolio (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'		'	'	'
Fair value	$153,333,000		$100,812,000	$86,783,000	$115,723,000
Outstanding principal of loans serviced others	13,718,942,000		'	'	'
Weighted average prepayment rate (in hundredths)	9.34%	[1]	'	'	'
Economic hedge threshold for interest rate sensitivity for mortgage servicing rights and securities held (in basis points)	50		'	'	'
Dollar increase in fair value, net of economic hedge, of mortgage servicing rights due to 50 basis point increase in mortgage interest rates	2,100,000		'	'	'
Dollar decrease in fair value, net of economic hedge, of mortgage servicing rights due to 50 basis point decrease in mortgage interest rates	2,300,000		'	'	'
Interest Rate Range Less than 4.00% [Member]	'		'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'		'	'	'
Fair value	62,962,000		'	'	'
Outstanding principal of loans serviced others	5,454,084,000		'	'	'
Weighted average prepayment rate (in hundredths)	6.66%	[1]	'	'	'
Interest Rate Range 4.00% to 4.99% [Member]	'		'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'		'	'	'
Fair value	55,721,000		'	'	'
Outstanding principal of loans serviced others	4,711,703,000		'	'	'
Weighted average prepayment rate (in hundredths)	7.85%	[1]	'	'	'
Interest Rate Range 5.00% to 5.99% [Member]	'		'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'		'	'	'
Fair value	27,446,000		'	'	'
Outstanding principal of loans serviced others	2,350,924,000		'	'	'
Weighted average prepayment rate (in hundredths)	9.93%	[1]	'	'	'
Interest Rate Range Greater than 5.99% [Member]	'		'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'		'	'	'
Fair value	7,204,000		'	'	'
Outstanding principal of loans serviced others	$1,202,231,000		'	'	'
Weighted average prepayment rate (in hundredths)	26.19%	[1]	'	'	'
[1]	Annual prepayment estimates based upon loan interest rate, original term and loan type. Weighted average prepayment rate is determined by weighting the prepayment speed for each loan by its unpaid principal balance.

Mortgage_Banking_Activities_Mo2

Mortgage Banking Activities Mortgage Banking Activities, Loans Serviced for Others (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	$13,355,479
Loans Serviced For Others, 30 To 59 Days Past Due	220,221
Loans Serviced For Others, 60 To 89 Days Past Due	63,003
Loans Serviced For Others, Greater Than 90 Days or More Past Due	80,239
Loans Serviced For Others	13,718,942
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	4,557,381
Loans Serviced For Others, 30 To 59 Days Past Due	42,359
Loans Serviced For Others, 60 To 89 Days Past Due	10,926
Loans Serviced For Others, Greater Than 90 Days or More Past Due	36,890
Loans Serviced For Others	4,647,556
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	4,111,774
Loans Serviced For Others, 30 To 59 Days Past Due	26,284
Loans Serviced For Others, 60 To 89 Days Past Due	7,828
Loans Serviced For Others, Greater Than 90 Days or More Past Due	20,658
Loans Serviced For Others	4,166,544
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	4,475,016
Loans Serviced For Others, 30 To 59 Days Past Due	149,707
Loans Serviced For Others, 60 To 89 Days Past Due	43,702
Loans Serviced For Others, Greater Than 90 Days or More Past Due	18,113
Loans Serviced For Others	4,686,538
Other Investor Loans [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	211,308
Loans Serviced For Others, 30 To 59 Days Past Due	1,871
Loans Serviced For Others, 60 To 89 Days Past Due	547
Loans Serviced For Others, Greater Than 90 Days or More Past Due	4,578
Loans Serviced For Others	$218,304

Mortgage_Banking_Activities_Lo1

Mortgage Banking Activities, Loans Sold With Recourse (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Residential mortgage loans sold with recourse [Abstract]	'	'	'
Carrying amount of residential mortgage loans sold and subject to recourse	$191,000,000	$227,000,000	'
Percentage of loans sold with recourse and either more than 90 days past due or in bankruptcy of foreclosure (in hundreths)	4.00%	'	'
Principal balance of loans sold with recourse and either 90 days or more past due or in bankruptcy or foreclosure	6,700,000	'	'
Percentage of loans sold with recourse and 30 to 89 days past due (in hundreths)	6.00%	'	'
Principal balance of loans sold with recourse and 30 to 89 days past due	12,000,000	'	'
Activity in the allowance for losses on loans sold with recourse [Abstract]	'	'	'
Beginning balance	11,359,000	18,683,000	16,667,000
Provision for recourse losses	565,000	-1,891,000	8,611,000
Loans charged off, net	-2,883,000	-5,433,000	-6,595,000
Ending balance	9,041,000	11,359,000	18,683,000
Residential Mortgage Loans Subject to Repurchase Under Standard Representations and Warranties [Abstract]	'	'	'
Number of mortgages purchased under repurchase agreement with US government sponsored entities	19	'	'
Purchase price of loans purchased under repurchase agreement with government sponsored entities	2,100,000	'	'
Losses incurred on actual repurchased loans from governmental sponsored entities with warranties	333,000	'	'
Number of loans sold under standard representation and warranties indemnified	14	'	'
Losses on mortgage loans indemnified during period	453,000	'	'
Number of loans with unresolved deficiency requests	578	389	'
Principal balance of loans with unresolved deficiency requests	69,288,000	44,831,000	'
Unpaid principal balance of mortgage loans subject to indemnification under standard representations and warranties	3,200,000	1,233,000	'
Accrual for credit losses for loan repurchased or indemnified under standard representation and warranties	$8,845,000	$5,291,000	'

Deposits_Details

Deposits (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest expense on deposits [Abstract]	'	'	'
Transaction deposits	$11,155,000	$14,300,000	$23,415,000
Savings	442,000	540,000	719,000
Time Deposit, Interest Expense [Abstract]	'	'	'
Certificates of deposits under $100,000	16,234,000	19,150,000	26,476,000
Certificates of deposits $100,000 and over	12,273,000	16,331,000	21,175,000
Other time deposits	15,460,000	16,692,000	17,105,000
Total time	43,967,000	52,173,000	64,756,000
Total	55,564,000	67,013,000	88,890,000
Time Deposits [Abstract]	'	'	'
Time Deposits, $100,000 or More, Domestic	1,800,000,000	1,900,000,000	'
Time Deposit Maturities [Abstract]	'	'	'
2014	1,200,000,000	'	'
2015	456,000,000	'	'
2016	329,000,000	'	'
2017	167,000,000	'	'
2018	204,000,000	'	'
Thereafter	309,000,000	'	'
Fixed rate, brokered certificates of deposits	186,000,000	187,000,000	'
Weighted-average interest rate paid on fixed rate, brokered certificates of deposits (in hundredths)	2.96%	3.17%	'
Other Deposits Information [Abstract]	'	'	'
Overdrawn transaction deposits reclassified as loan balances	$37,000,000	$9,200,000	'

Other_Borrowings_Details

Other Borrowings (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Other Borrowings [Line Items]	'		'		'
Balance	$3,069,690,000		$3,053,854,000		$2,769,748,000
Average balance	3,719,768,000		3,104,724,000		2,678,641,000
Weighted Average Interest Rate During Period	0.40%		0.65%		1.17%
US Agency Securities [Member]	'		'		'
Repurchase Agreements, Security Sold/Maturity [Abstract]	'		'		'
Amortized Cost	1,085,893,000		1,213,593,000		'
Market Value	1,075,821,000		1,242,314,000		'
Repurchase Liability	813,624,000	[1]	877,382,000	[1]	'
Average Rate (in hundredths)	0.05%		0.07%		'
US Agency Securities [Member] | Overnight [Member]	'		'		'
Repurchase Agreements, Security Sold/Maturity [Abstract]	'		'		'
Amortized Cost	1,085,893,000		1,213,593,000		'
Market Value	1,075,821,000		1,242,314,000		'
Repurchase Liability	813,624,000	[1]	877,382,000	[1]	'
Average Rate (in hundredths)	0.05%		0.07%		'
US Agency Securities [Member] | Long-term [Member]	'		'		'
Repurchase Agreements, Security Sold/Maturity [Abstract]	'		'		'
Amortized Cost	0		0		'
Market Value	0		0		'
Repurchase Liability	0	[1]	0	[1]	'
Average Rate (in hundredths)	0.00%		0.00%		'
Parent Company and other non-bank subsidiaries [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	0		10,500,000		0
Average balance	326,000		394,000		7,093,000
Weighted Average Interest Rate During Period	0.00%		1.11%		6.42%
Other borrowings, Maturities [Abstract]	'		'		'
2014	0		'		'
2015	0		'		'
2016	0		'		'
2017	0		'		'
2018	0		'		'
Thereafter	0		'		'
Senior Unsecured Revolving Credit Facility [Abstract]	'		'		'
Senior unsecured revolving credit facility, revolving period	'364		'		'
Parent Company and other non-bank subsidiaries [Member] | Senior Unsecured Revolving Credit Facility [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	0		0		'
Other borrowings, Other Disclosures [Abstract]	'		'		'
Maturity date	5-Jun-14		'		'
Senior Unsecured Revolving Credit Facility [Abstract]	'		'		'
Senior unsecured revolving credit facility, borrowing capacity	100,000,000		'		'
Senior unsecured revolving credit facility, interest rate description	'defined base rate minus 1.25% or LIBOR plus 1.00% based upon the Company’s option		'		'
Senior unsecured revolving credit facility, Term loan, interest rate description	'defined base rate minus 1.25% or LIBOR plus 1.25%		'		'
Senior unsecured revolving credit facility, unused capacity, commitment fee percentage	0.20%		'		'
Parent Company and other non-bank subsidiaries [Member] | Trust Preferred Debt [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	'		'		0
Weighted Average Interest Rate	'		'		0.00%
Average balance	'		'		7,093,000
Weighted Average Interest Rate During Period	'		'		6.42%
Maximum Outstanding At Any Month End	'		'		8,763,000
Parent Company and other non-bank subsidiaries [Member] | Other Borrowings [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	0		10,500,000		0
Weighted Average Interest Rate	0.00%		1.50%		0.00%
Average balance	326,000		394,000		0
Weighted Average Interest Rate During Period	0.00%		1.11%		0.00%
Maximum Outstanding At Any Month End	0		10,500,000		0
Subsidiary Bank [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	3,069,690,000		3,043,354,000		2,769,748,000
Average balance	3,719,442,000		3,104,330,000		2,671,548,000
Weighted Average Interest Rate During Period	0.41%		0.65%		1.06%
Other borrowings, Maturities [Abstract]	'		'		'
2014	2,705,823,000		'		'
2015	122,032,000		'		'
2016	525,000		'		'
2017	226,820,000		'		'
2018	575,000		'		'
Thereafter	13,915,000		'		'
Subsidiary Bank [Member] | Funds Purchased [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	868,081,000		1,167,416,000		1,063,318,000
Weighted Average Interest Rate	0.04%		0.05%		0.03%
Average balance	866,062,000		1,512,711,000		1,046,114,000
Weighted Average Interest Rate During Period	0.10%		0.14%		0.07%
Maximum Outstanding At Any Month End	997,536,000		1,810,793,000		1,706,893,000
Other borrowings, Other Disclosures [Abstract]	'		'		'
Number of days to maturity, minimum	'1 day		'		'
Number of days to maturity, maximum	'90 days		'		'
Subsidiary Bank [Member] | Repurchase Agreements [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	813,454,000		887,030,000		1,233,064,000
Weighted Average Interest Rate	0.05%		0.07%		0.09%
Average balance	811,996,000		1,072,650,000		1,096,615,000
Weighted Average Interest Rate During Period	0.06%		0.09%		0.12%
Maximum Outstanding At Any Month End	881,033,000		1,272,151,000		1,393,237,000
Other borrowings, Other Disclosures [Abstract]	'		'		'
Number of days to maturity, maximum	'90 days		'		'
Accrued interest payable	0		0		'
Subsidiary Bank [Member] | Other Borrowings [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	1,040,353,000		641,275,000		74,485,000
Average balance	1,693,667,000		155,270,000		130,029,000
Weighted Average Interest Rate During Period	0.27%		'		'
Subsidiary Bank [Member] | Federal Home Loan Bank Advances [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	1,005,650,000		604,897,000		4,837,000
Weighted Average Interest Rate	0.19%		0.23%		0.27%
Average balance	1,661,424,000		104,925,000		45,110,000
Weighted Average Interest Rate During Period	0.20%		0.31%		0.38%
Maximum Outstanding At Any Month End	2,451,197,000		604,897,000		201,674,000
Other borrowings, Other Disclosures [Abstract]	'		'		'
Federal Home Loan Banks, Letters of credit issued to secure public funds	297,000,000		'		'
Unused credit available pursuant to the FHLB's collateral policies	2,300,000,000		'		'
Subsidiary Bank [Member] | GNMA Repurchase Liability [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	18,113,000		20,046,000		53,082,000
Weighted Average Interest Rate	5.50%		5.44%		6.18%
Average balance	15,741,000		33,768,000		56,142,000
Weighted Average Interest Rate During Period	5.43%		5.41%		5.79%
Maximum Outstanding At Any Month End	21,055,000		47,840,000		118,595,000
Subsidiary Bank [Member] | Other [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	16,590,000		16,332,000		16,566,000
Weighted Average Interest Rate	2.35%		5.10%		5.10%
Average balance	16,502,000		16,577,000		28,777,000
Weighted Average Interest Rate During Period	2.54%		2.91%		3.23%
Maximum Outstanding At Any Month End	17,092,000		16,761,000		45,366,000
Subsidiary Bank [Member] | Subordinated Debentures [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	347,802,000		347,633,000		398,881,000
Weighted Average Interest Rate	5.11%		2.40%		5.47%
Average balance	347,717,000		363,699,000		398,790,000
Weighted Average Interest Rate During Period	2.51%		3.79%		5.74%
Maximum Outstanding At Any Month End	347,802,000		398,897,000		398,881,000
Subsidiary Bank [Member] | Subordinated Debentures, 2007 Issuance [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	227,000,000		'		'
Other borrowings, Other Disclosures [Abstract]	'		'		'
Amount of debt issuance	250,000,000		'		'
Maturity date	15-May-17		'		'
Interest rate description	'fixed rate of 5.75% through May 14, 2012 and is based on a floating rate of three-month LIBOR plus 0.69% thereafter		'		'
Subsidiary Bank [Member] | Subordinated Debentures, 2005 Issuance [Member]	'		'		'
Other Borrowings [Line Items]	'		'		'
Balance	122,000,000		'		'
Weighted Average Interest Rate	5.56%		'		'
Other borrowings, Other Disclosures [Abstract]	'		'		'
Amount of debt issuance	$150,000,000		'		'
Maturity date	1-Jun-15		'		'
[1]	1 BOK Financial maintains control over the securities underlying overnight repurchase agreements and generally transfers control over securities underlying longer-term dealer repurchase agreements to the respective counterparty.

Federal_and_State_Income_Taxes2

Federal and State Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Gross [Abstract]	'	'	'
Deferred Tax Assets, Available for sale securities mark to market	$14,700,000	$0	'
Deferred Tax Assets, Stock-based compensation	8,100,000	9,100,000	'
Deferred Tax Assets, Credit loss allowances	75,600,000	86,100,000	'
Deferred Tax Assets, Valuation adjustments	35,300,000	45,100,000	'
Deferred Tax Assets, Deferred book income	3,500,000	7,200,000	'
Deferred Tax Assets, Deferred compensation	60,100,000	45,100,000	'
Deferred Tax Assets, Other	29,500,000	31,300,000	'
Deferred Tax Assets, Total	226,800,000	223,900,000	'
Deferred Tax Liabilities, Gross [Abstract]	'	'	'
Deferred Tax Liabilities, Available for sale securities mark to market	0	99,000,000	'
Deferred Tax Liabilities, Depreciation	17,300,000	19,600,000	'
Deferred Tax Liabilities, Mortgage servicing rights	72,200,000	59,500,000	'
Deferred Tax Liabilities, Lease financing	23,200,000	21,100,000	'
Deferred Tax Liabilities, Other	18,500,000	21,700,000	'
Deferred Tax Liabilities, Total	131,200,000	220,900,000	'
Deferred Tax Assets, Net	95,600,000	3,000,000	'
Current income tax expense [Abstract]	'	'	'
Current income tax expense, Federal	125,412,000	159,706,000	137,802,000
Current income tax expense, State	14,381,000	19,103,000	16,085,000
Current income tax expense, Total	139,793,000	178,809,000	153,887,000
Deferred income tax expense [Abstract]	'	'	'
Deferred income tax expense, Federal	15,915,000	8,664,000	3,882,000
Deferred income tax expense, State	1,590,000	1,267,000	742,000
Deferred income tax expense, Total	17,505,000	9,931,000	4,624,000
Total income tax expense	157,298,000	188,740,000	158,511,000
Effective Income Tax Rate Reconciliation, Amount [Abstract]	'	'	'
Federal statutory tax	166,680,000	190,003,000	156,917,000
Tax exempt revenue	-7,361,000	-5,558,000	-5,357,000
Effect of state income taxes, net of federal benefit	10,937,000	13,684,000	11,198,000
Utilization of tax credits	-8,145,000	-5,126,000	-2,972,000
Bank-owned life insurance	-3,596,000	-3,850,000	-3,879,000
Reduction of tax accrual	-1,400,000	-950,000	-1,764,000
Other, net	183,000	537,000	4,368,000
Total	157,298,000	188,740,000	158,511,000
Effective Income Tax Rate Reconciliation, Percent [Abstract]	'	'	'
Federal statutory tax (in hundredths)	35.00%	35.00%	35.00%
Tax exempt revenue (in hundredths)	-1.00%	-1.00%	-1.00%
Effect of state income taxes, net of federal benefit (in hundredths)	2.00%	3.00%	2.00%
Utilization of tax credits (in hundredths)	-2.00%	-1.00%	-1.00%
Bank-owned life insurance (in hundredths)	-1.00%	-1.00%	-1.00%
Reduction of tax accrual (in hundredths)	0.00%	0.00%	0.00%
Other, net (in hundredths)	0.00%	0.00%	1.00%
Total (in hundredths)	33.00%	35.00%	35.00%
Tax accrual reduction	1,400,000	1,000,000	'
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'	'
Balance as of January 1	12,275,000	12,230,000	11,900,000
Additions for tax for current year positions	2,730,000	3,976,000	6,390,000
Settlements during the period	0	-1,000,000	-2,510,000
Lapses of applicable statute of limitations	-2,947,000	-2,931,000	-3,550,000
Balance as of December 31	12,058,000	12,275,000	12,230,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	1,200,000	1,200,000	1,900,000
Unrecognized Tax Benefits, Penalties and Interest Accrued	$2,900,000	'	'
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, Federal	'3 years	'	'
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Minimum	'3 years	'	'
Unrecognized Tax Benefits, Number of Reporting Periods Open for Examination, State, Maximum	'6 years	'	'

Employee_Benefits_Details

Employee Benefits (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]	'		'		'
Defined Benefit Plan, Interest perrcentage accrued on employees account balances (in hundredths)	'		5.25%		'
Defined Benefit Plan, Interest Percentage Accrued On Employee Account Balances, Next Fiscal Year (Rate to Add to Treasury Securities Rate)	1.50%		'		'
Defined Benefit Plan Interest Percentage Accrued On Employee Account Balances, Next Fiscal Year (Minimum)	2.50%		'		'
Defined Benefit Plan Interest Percentage Accrued on Employee Account Balances, Next Fiscal Year (Maximum)	5.00%		'		'
Thrift Plan - Defined Contribution [Abstract]	'		'		'
Employee base compensation company match employee contributions (in hundredths)	6.00%		'		'
Employer matching rate for employee contributions minimum (in hundredths)	50.00%		'		'
Minimum years of service for employees to obtain maximum employer matching (in years)	'P4Y		'		'
Employer matching rate for employee contributions maximum (in hundredths)	200.00%		'		'
Maximum years of service for employees to obtain minimum employer matching (in years)	'15 years		'		'
Non-elective annual contribution for qualified employees	$750		'		'
Annual base employee compensation to qualify for non-elective employer contributions maximum	40,000		'		'
Defined Contribution Plan, Employer Discretionary Contribution Amount	738,000		802,000		933,000
Vesting period for employer contributions (in years)	'5 years		'		'
Thrift Plan expenses	18,100,000		16,800,000		15,400,000
Incentive compensation plans [Abstract]	'		'		'
Charge to earnings for incentive compensation plan	151,100,000		153,900,000		117,800,000
DefinedBenefitPlanQuarterlyVariableInterestRateAccruedOnEmployeeAccountBalancesMinimum	3.07%		'		'
DefinedBenefitPlanQuarterlyVariableRateAccruedOnEmployeeAccountBalancesMaximum	3.27%		'		'
Pension Plan [Member]	'		'		'
Change in projected benefit obligation [Roll Forward]	'		'		'
Projected benefit obligation at beginning of year	48,028,000	[1],[2]	50,213,000		'
Interest cost	1,532,000		1,925,000		'
Actuarial loss	-1,543,000		2,786,000		'
Benefits paid	-3,252,000		-2,194,000		'
Plan amendments	0		-4,702,000		'
Projected benefit obligation at end of year	44,765,000	[1],[2]	48,028,000	[1],[2]	'
Change in plan assets [Roll Forward]	'		'		'
Plan assets at fair value at beginning of year	45,920,000		43,859,000		'
Actual return on plan assets	6,144,000		4,255,000		'
Benefits paid	-3,252,000		-2,194,000		'
Plan assets at fair value at end of year	48,812,000		45,920,000		'
Defined Benefit Plan, Funded Status of Plan [Abstract]	'		'		'
Funded status of the plan	4,047,000		-2,108,000		'
Components of net periodic benefit costs [Abstract]	'		'		'
Interest cost	1,532,000		1,925,000		'
Expected return on plan assets	-2,185,000		-2,062,000		'
Recognized prior service cost	-1,175,000		0		'
Amortization of unrecognized net loss	3,830,000		3,461,000		'
Net periodic pension cost (benefit)	2,002,000		3,324,000		'
Weighted-average assumptions [Abstract]	'		'		'
Discount rate (in hundredths)	4.05%		3.36%		'
Expected return on plan assets (in hundredths)	6.00%		5.25%		'
Estimated Future Benefit Payments [Abstract]	'		'		'
2014	3,886,000		'		'
2015	3,713,000		'		'
2016	3,386,000		'		'
2017	3,351,000		'		'
2018	3,488,000		'		'
Thereafter	40,394,000		'		'
Total estimated future benefit payments	58,218,000		'		'
Defined Benefit Plan, Information about Plan Assets [Abstract]	'		'		'
Defined Benefit Plan, Plan Assets, Inception to date return (in hundredths)	7.34%		'		'
Defined Benefit Plan, Plan contributions, Maximum allowed	23,000,000		'		'
Net pension costs currently in accumulated other comprehensive income to be recognized as net periodic pension cost in next fiscal year	$600,000		'		'
Equity Securities [Member] | Pension Plan [Member]	'		'		'
Defined Benefit Plan, Information about Plan Assets [Abstract]	'		'		'
Percentage of equities included in portfolio mix of fund used for defined benefit plan (in hundredths)	60.00%		'		'
Bonds [Member] | Pension Plan [Member]	'		'		'
Defined Benefit Plan, Information about Plan Assets [Abstract]	'		'		'
Percentage of equities included in portfolio mix of fund used for defined benefit plan (in hundredths)	40.00%		'		'
[1]	Projected benefit obligation is based on January 1 measurement date.
[2]	Projected benefit obligation equals accumulated benefit obligation.

Stock_Compensation_Plans_Detai

Stock Compensation Plans (Details) (USD $)

12 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Jan. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Non-vested Common Stock [Member]

Non-vested Common Stock [Member]

Non-vested Common Stock [Member]

Non-vested Common Stock [Member]

Exercise Price 55.94 [Member]

Exercise Price 37.74 [Member]

Exercise Price 45.15 - 47.34 [Member]

Exercise Price 54.33 [Member]

Exercise Price 48.46 [Member]

Exercise Price 36.65 [Member]

Exercise Price 48.30 [Member]

Exercise Price 55.74 [Member]

Exercise Price 58.76 [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options awarded that vest annually

'

'

'

'one-seventh

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expiration period (in years)

'

'

'

'3 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock options vesting period - tier two

'

'

'

'2 years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock option expiration period - tier two (in days)

'

'

'

'45 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based compensation arrangement by share-based payment award award vesting period (min)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'

'

Share-based compensation arrangement by share-based payment award award vesting period (max)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'5 years

'

'

Required retention period after vesting (in years)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years

'2 years

'

'

Share-based Compensation Arragngement by Share-based Payment Award, Options, Outstanding, Number of Options [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of options outstanding shares beginning balance (in shares)

'

'

'

1,890,786

2,621,347

3,135,334

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options awarded (in shares)

'

'

'

81,492

67,155

185,007

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options exercised (in shares)

'

'

'

-608,663

-708,295

-576,518

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options forfeited (in shares)

'

'

'

-219,342

-22,559

-60,005

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options expired (in shares)

'

'

'

-9,168

-66,862

-62,471

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of options outstanding shares ending balance (in shares)

'

'

'

1,135,105

1,890,786

2,621,347

'

214,483

1,267

84,725

134,485

233,739

253,607

47,581

81,492

83,726

'

'

'

'

Options shares vested (in shares)

'

'

'

424,459

601,367

825,682

'

102,311

1,267

84,725

74,447

80,747

61,449

11,007

0

8,506

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Weighted Average Exercise Price [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options outstanding, weighted average exercise price, beginning balance (in dollars per share)

'

'

'

$48.29

$47.01

$45.62

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options awarded, weighted average exercise price (in dollars per share)

'

'

'

$55.74

$58.76

$55.94

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options exercised, weighted average exercise price (in dollars per share)

'

'

'

$48

$45.32

$44.35

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options forfeited, weighted average exercise price (in dollars per share)

'

'

'

$47.65

$50.36

$47.93

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options expired, weighted average exercise price (in dollars per share)

'

'

'

$50.61

$45.97

$54.13

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options outstanding, weighted average exercise price, ending balance (in dollars per share)

'

'

'

$49.09

$48.29

$47.01

'

$55.94

$37.74

$47.12

$54.33

$48.46

$36.65

$48.30

$55.74

$58.76

'

'

'

'

Options vested, weighted average exercise price (in dollars per share)

'

'

'

$49.49

$47.99

$46.72

'

$55.94

$37.74

$47.12

$54.33

$48.46

$36.65

$48.30

$0

$58.76

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Intrinsic Value [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options outstanding, aggregate intrinsic value

'

'

'

$19,564,000

$11,748,000

$20,769,000

$24,405,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Options vested, aggregate intrinsic value

'

'

'

7,146,000

3,890,000

6,779,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Options exercised, aggregate intrinsic value

'

'

'

8,500,000

8,300,000

5,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average remaining contractual life (in years)

'

'

'

'

'

'

'

'2 years 11 months 27 days

'7 days

'1 year 5 months 1 day

'2 years 1 month 10 days

'2 years 10 months 17 days

'3 years 5 months 9 days

'3 years 10 months 2 days

'6 years 11 days

'5 years 2 months 5 days

'

'

'

'

Weighted average remaining contractual life of options vested (in years)

'

'

'

'

'

'

'

'8 months 27 days

'7 days

'1 year 5 months 1 day

'1 year 4 months 13 days

'1 year 7 months 28 days

'1 year 7 months 21 days

'1 year 6 months 4 days

'0 years

'2 years 11 days

'

'

'

'

Weighted average assumptions used to determine fair value of stock options awarded [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Average risk-free interest rate (in hundredths)

'

'

'

0.89%

[1]

0.93%

[1]

1.87%

[1]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Dividend yield (in hundredths)

'

'

'

2.80%

2.20%

1.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Volatility factors

'

'

'

27.20%

28.00%

26.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average expected life

'

'

'

'4 years 10 months 24 days

'4 years 10 months 24 days

'4 years 10 months 24 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average fair value (in dollars per share)

'

'

'

$9.67

$11.48

$11.92

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Expense Recognized

'

'

'

1,300,000

4,100,000

4,300,000

'

'

'

'

'

'

'

'

'

'

'

6,900,000

5,600,000

5,700,000

Share-based Compensation Costs, Including Costs That May Be Recognized As Future Expense [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unrecognized compensation cost of unvested awards, for future periods

'

'

'

1,900,000

'

'

'

'

'

'

'

'

'

'

'

'

13,300,000

15,300,000

'

'

Expected compensation expense, 2014

'

'

'

865,000

'

'

'

'

'

'

'

'

'

'

'

'

'

7,000,000

'

'

Expected compensation expense, 2015

'

'

'

504,000

'

'

'

'

'

'

'

'

'

'

'

'

'

6,300,000

'

'

Expected compensation expense, 2016

'

'

'

299,000

'

'

'

'

'

'

'

'

'

'

'

'

'

1,800,000

'

'

Expected compensation expense, 2017

'

'

'

166,000

'

'

'

'

'

'

'

'

'

'

'

'

'

175,000

'

'

Expected compensation expense, 2018

'

'

'

66,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expected compensation expense, thereafter

'

'

'

20,000

'

'

'

'

'

'

'

'

'

'

'

'

'

0

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock, Nonvested, Number of Shares [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Non-vested common shares awarded, beginning of period (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

647,989

592,831

'

'

Non-vested common shares awarded during period (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

211,791

'

'

Non-vested shares that vested during period (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-66,648

'

'

Non-vested shares that forfeited during period (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-89,985

'

'

Non-vested common shares awarded, end of period (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

647,989

592,831

'

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average grant date fair value of non-vested shares awarded (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$64.37

$55.84

'

'

Weighted average grant date fair value non-vested stock awards vested (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$35.93

'

'

Weighted average grant date fair value non-vested stock awards forfeited (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$49.95

'

'

Deferred Compensation Plan [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Recorded obligation for liability awards under deferred compensation plan

120,000

87,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Compensation cost of liability awards recorded as an expense (benefit)

343,000

530,000

760,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Additional Compensation Accrued for Certain Senior Executive Related to 2011 True-Up Plan

$69,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

206,546

'

'

'

Vesting period (in years)

'

'

'

'7 years

'

'

'

'

'

'

'

'

'

'

'

'

'3 years

'

'

'

[1]

Average risk-free interest rate represents U.S. Treasury rates matched to the expected life of the options.

Related_Parties_Related_Partie1

Related Parties Related Parties (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Loans and Leases Receivable, Related Parties [Roll Forward]	'	'	'
Lease payments on office space in facilities owned by related party afffiliates	$23,500,000	$21,700,000	$20,600,000
Management [Member]	'	'	'
Loans and Leases Receivable, Related Parties [Roll Forward]	'	'	'
Beginning balance	49,943,000	99,340,000	'
Advances	292,393,000	644,715,000	'
Payments	-253,645,000	-684,942,000	'
Adjustments	0	-9,170,000	'
Ending balance	88,691,000	49,943,000	'
Board of Directors Chairman [Member]	'	'	'
Loans and Leases Receivable, Related Parties [Roll Forward]	'	'	'
Lease payments on office space in facilities owned by related party afffiliates	952,000	1,100,000	1,100,000
Executive Officer [Member]	'	'	'
Loans and Leases Receivable, Related Parties [Roll Forward]	'	'	'
Loan commitment secured by tax-exempt bonds purchased from a trust of which the related party is chairman of the trust	25,000,000	'	'
Percentage of investment funds' assets held by clients	99.00%	'	'
Assets Held in Cavanal Hill Funds	$2,800,000,000	'	'

Commitments_and_Contingent_Lia2

Commitments and Contingent Liabilities (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Oct. 11, 2011	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
				BOKF, NA [Member]	BOKF, NA [Member]	Parent Company [Member]	Cavanal Hill Funds [Member]	BOKF Equity, LLC [Member]
				Invalidated Settlement by Oklahoma Supreme Court [Member]	Invalidated Settlement by Oklahoma Supreme Court [Member]	Visa Membership [Member]
Loss Contingencies [Line Items]	'	'	'	'	'	'	'	'
Settlement Agreement, Counterparty's Name	'	'	'	'City of Tulsa	'	'	'	'
Settlement Agreement, Amount	'	'	'	'	$7,100,000	'	'	'
Number of Visa Class B Shares Owned by Entity (in shares)	'	'	'	'	'	251,837	'	'
Amount Deposited by Visa in Escrow for Covered Litigation	'	'	'	'	'	150,000,000	'	'
Current Exchange Rate For Class A shares For Each Class B Share	'	'	'	'	'	0.4206	'	'
Number of Private Equity Funds of which the Entity is a General Partner	2	'	'	'	'	'	'	'
Contingent Obligations For Additional Investments in Private Equity Funds	'	'	'	'	'	'	'	5,900,000
Mutual Fund Investment in US Treasury Securities	'	'	'	'	'	'	884,000,000	'
Mutual Fund Investment in Cash Management	'	'	'	'	'	'	1,200,000,000	'
Mutual Fund Investment in Tax-Free Money Market Funds	'	'	'	'	'	'	314,000,000	'
The Net Asset Value of Units in Mutual Funds (per unit)	'	'	'	'	'	'	1	'
Operating Leases, Rent Expense, Net	23,500,000	21,700,000	20,600,000	'	'	'	'	'
Operating Leases, Future Minimum Payments Due, Next Twelve Months	23,800,000	'	'	'	'	'	'	'
Operating Leases, Future Minimum Payments, Due in Two Years	23,900,000	'	'	'	'	'	'	'
Operating Leases, Future Minimum Payments, Due in Three Years	21,500,000	'	'	'	'	'	'	'
Operating Leases, Future Minimum Payments, Due in Four Years	17,900,000	'	'	'	'	'	'	'
Operating Leases, Future Minimum Payments, Due in Five Years	13,800,000	'	'	'	'	'	'	'
Operating Leases, Future Minimum Payments, Due Thereafter	113,000,000	'	'	'	'	'	'	'
Minimum Average Cash Balance Required to be Maintained at Federal Reserve by Subsidiary Bank	$830,000,000	$733,000,000	'	'	'	'	'	'

Commitments_and_Contingent_Lia3

Commitments and Contingent Liabilities Guarantor Obligations (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013
Guarantor Obligations [Line Items]	'
Purchase price of tax credits	$13
Property Lease Guarantee [Member]	'
Guarantor Obligations [Line Items]	'
Total amount of guaranteed rents	28.7
Contingent Obligation For Guaranteed Rents	11.2
Guaranteed Percentage To Be Received (in hundredths)	80.00%
Maximum Amount To Be Received Under Rent Agreement With City Of Tulsa	4.5
BOSC, Inc. [Member]	'
Guarantor Obligations [Line Items]	'
Customer balances subject to indemnification by Pershing, LLC	$1.40

Commitments_and_Contingent_Lia4

Commitments and Contingent Liabilities Variable Interest Entities (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Variable Interest Entity [Line Items]	'	'
Number of Private Equity Funds of which the Entity is a General Partner	2	'
Loans [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	$10,000	$10,000
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	27,319	22,354
Other Assets VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	49,967	51,086
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	99,517	87,222
Other Liabilities VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	37,457	44,854
Other Borrowings VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	10,964	10,964
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Non-controlling Interest [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	34,924	35,821
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Private Equity Funds Variable Interest Entities [Member] | Loans [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Private Equity Funds Variable Interest Entities [Member] | Other Liabilities VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Private Equity Funds Variable Interest Entities [Member] | Other Borrowings VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Private Equity Funds Variable Interest Entities [Member] | Non-controlling Interest [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	23,036	23,691
Tax Credit Variable Interest Entities [Member] | Loans [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	10,000	10,000
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	27,319	22,354
Tax Credit Variable Interest Entities [Member] | Other Assets VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	13,448	13,965
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	90,260	78,109
Tax Credit Variable Interest Entities [Member] | Other Liabilities VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	35,776	43,052
Tax Credit Variable Interest Entities [Member] | Other Borrowings VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	10,964	10,964
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Tax Credit Variable Interest Entities [Member] | Non-controlling Interest [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	9,869	10,000
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Other Variable Interest Entities [Member] | Loans [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Other Variable Interest Entities [Member] | Other Assets VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	9,178	8,952
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	9,257	9,113
Other Variable Interest Entities [Member] | Other Liabilities VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	1,681	1,802
Other Variable Interest Entities [Member] | Other Borrowings VIE [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0
Other Variable Interest Entities [Member] | Non-controlling Interest [Member]	'	'
Variable Interest Entity [Line Items]	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	2,019	2,130
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	$0	$0

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Numerator: [Abstract]:	'	'	'
Net income attributable to BOK Financial Corp. shareholders	$316,609	$351,191	$285,875
Less: Earnings allocated to participating securities	3,388	2,541	2,214
Numerator for basic earnings per share - income available to common shareholders	313,221	348,650	283,661
Effect of reallocating undistributed earnings of participating securities	7	6	6
Numerator for diluted earnings per share - income available to common shareholders	$313,228	$348,656	$283,667
Denominator: [Abstract]	'	'	'
Weighted average shares outstanding	68,719,069	68,221,013	68,313,898
Less: Participating securities included in weighted average shares outstanding (in shares)	730,172	536,970	526,222
Denominator for basic earnings per common share (in shares)	67,988,897	67,684,043	67,787,676
Dilutive effect of employee stock compensation plans (in shares)	216,622	280,897	251,087
Denominator for diluted earnings per common share (in shares)	68,205,519	67,964,940	68,038,763
Basic earnings per share (per share)	$4.61	$5.15	$4.18
Diluted earnings per share (per share)	$4.59	$5.13	$4.17
Excludes employee stock options with exercise prices greater than current market price.	0	224,653	769,041

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Common stock, authorized (in shares)	2,500,000,000		2,500,000,000		'
Common stock, par value (in dollars per share)	$0.00		$0.00		'
Accumulated Other Comprehensive Income [Roll Forward]	'		'		'
Beginning balance	$149,920,000		$128,979,000		$107,839,000
Net change in unrealized gain (loss)	-275,945,000		66,197,000		47,287,000
Transfer of net unrealized gain from AFS to Investment securities	'		'		0
Reclassification adjustments included in earnings [Abstract]	'		'		'
Interest revenue, Investment securities, Taxable securities	-3,210,000		-6,601,000		-1,357,000
Interest expense, Subordinated debentures	262,000		453,000		304,000
Net impairment losses recognized in earnings	2,308,000		7,351,000		23,507,000
Gain on available for sale securities, net	-10,720,000		-33,845,000		-34,144,000
Other comprehensive income (loss) before income taxes	-287,305,000		33,555,000		35,597,000
Federal and state income tax	111,762,000	[1]	-12,614,000	[1]	-14,457,000	[1]
Other comprehensive income (loss), net of income taxes	-175,543,000		20,941,000		21,140,000
Ending balance	-25,623,000		149,920,000		128,979,000
Total Capital (to Risk Weighted Assets) [Abstract]	'		'		'
Total Capital Ratio Required to be Well Capitalized	10.00%		10.00%		'
Total Capital	3,017,022,000		2,877,949,000		'
Total Capital to Risk Weighted Assets	15.56%		15.13%		'
Tier I Capital (to Risk Weighted Assets) [Abstract]	'		'		'
Tier I Capital Ratio Required to be Well Capitalized	6.00%		6.00%		'
Tier I Capital	2,668,981,000		2,430,671,000		'
Tier I Capital to Risk Weighted Assets	13.77%		12.78%		'
Tier I Capital (to Average Assets) [Abstract]	'		'		'
Leverage Ratio Required to be Well Capitalized	5.00%		5.00%		'
Tier I Capital to Average Assets	10.05%		9.01%		'
Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]	'		'		'
Accumulated Other Comprehensive Income [Roll Forward]	'		'		'
Beginning balance	155,553,000		135,740,000		122,494,000
Net change in unrealized gain (loss)	-284,104,000		58,921,000		45,593,000
Transfer of net unrealized gain from AFS to Investment securities	'		'		-12,999,000
Reclassification adjustments included in earnings [Abstract]	'		'		'
Interest revenue, Investment securities, Taxable securities	0		0		0
Interest expense, Subordinated debentures	0		0		0
Net impairment losses recognized in earnings	2,308,000		7,351,000		23,507,000
Gain on available for sale securities, net	-10,720,000		-33,845,000		-34,144,000
Other comprehensive income (loss) before income taxes	-292,516,000		32,427,000		21,957,000
Federal and state income tax	113,788,000	[1]	-12,614,000	[1]	-8,711,000	[1]
Other comprehensive income (loss), net of income taxes	-178,728,000		19,813,000		13,246,000
Ending balance	-23,175,000		155,553,000		135,740,000
Accumulated Unrealized Gain on Investment Securities Transferred from AFS [Member]	'		'		'
Accumulated Other Comprehensive Income [Roll Forward]	'		'		'
Beginning balance	3,078,000		6,673,000		0
Net change in unrealized gain (loss)	0		0		0
Transfer of net unrealized gain from AFS to Investment securities	'		'		12,999,000
Reclassification adjustments included in earnings [Abstract]	'		'		'
Interest revenue, Investment securities, Taxable securities	-3,210,000		-6,601,000		-1,357,000
Interest expense, Subordinated debentures	0		0		0
Net impairment losses recognized in earnings	0		0		0
Gain on available for sale securities, net	0		0		0
Other comprehensive income (loss) before income taxes	-3,210,000		-6,601,000		11,642,000
Federal and state income tax	1,250,000	[1]	3,006,000	[1]	-4,969,000	[1]
Other comprehensive income (loss), net of income taxes	-1,960,000		-3,595,000		6,673,000
Ending balance	1,118,000		3,078,000		6,673,000
Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]	'		'		'
Accumulated Other Comprehensive Income [Roll Forward]	'		'		'
Beginning balance	-8,296,000		-12,742,000		-13,777,000
Net change in unrealized gain (loss)	8,159,000		7,276,000		1,694,000
Transfer of net unrealized gain from AFS to Investment securities	'		'		0
Reclassification adjustments included in earnings [Abstract]	'		'		'
Interest revenue, Investment securities, Taxable securities	0		0		0
Interest expense, Subordinated debentures	0		0		0
Net impairment losses recognized in earnings	0		0		0
Gain on available for sale securities, net	0		0		0
Other comprehensive income (loss) before income taxes	8,159,000		7,276,000		1,694,000
Federal and state income tax	-3,174,000	[1]	-2,830,000	[1]	-659,000	[1]
Other comprehensive income (loss), net of income taxes	4,985,000		4,446,000		1,035,000
Ending balance	-3,311,000		-8,296,000		-12,742,000
Accumulated Loss on Effective Cash Flow Hedges [Member]	'		'		'
Accumulated Other Comprehensive Income [Roll Forward]	'		'		'
Beginning balance	-415,000		-692,000		-878,000
Net change in unrealized gain (loss)	0		0		0
Transfer of net unrealized gain from AFS to Investment securities	'		'		0
Reclassification adjustments included in earnings [Abstract]	'		'		'
Interest revenue, Investment securities, Taxable securities	0		0		0
Interest expense, Subordinated debentures	262,000		453,000		304,000
Net impairment losses recognized in earnings	0		0		0
Gain on available for sale securities, net	0		0		0
Other comprehensive income (loss) before income taxes	262,000		453,000		304,000
Federal and state income tax	-102,000	[1]	-176,000	[1]	-118,000	[1]
Other comprehensive income (loss), net of income taxes	160,000		277,000		186,000
Ending balance	-255,000		-415,000		-692,000
BOKF, NA [Member]	'		'		'
Allowed dividends without regulatory approval	225,000,000		275,000,000		270,000,000
Maximum percentage of unimpaired capital on loan commitments and equity investments to a single affiliate (in hundredths)	10.00%		'		'
Maximum percentage of unimpaired capital on loan commitments and equity investments to all affiliates (in hundredths)	20.00%		'		'
Maximum loan commitments and equity investments to a single affiliate	229,000,000		'		'
Maximum loan commitments and equity investments to all affiliates	459,000,000		'		'
Largest loan commitment and equity investment to a single affiliate	220,000,000		'		'
Aggregate loan commitment and equity investment to all affiliates	334,000,000		330,000,000		'
Largest amount outstanding to a single affiliate	22,000,000		'		'
Outstanding amounts to all affiliates	27,000,000		68,000,000		'
Total Capital (to Risk Weighted Assets) [Abstract]	'		'		'
Total Capital	2,293,673,000		2,296,451,000		'
Total Capital to Risk Weighted Assets	11.88%		12.13%		'
Tier I Capital (to Risk Weighted Assets) [Abstract]	'		'		'
Tier I Capital	1,946,247,000		1,849,769,000		'
Tier I Capital to Risk Weighted Assets	10.08%		9.77%		'
Tier I Capital (to Average Assets) [Abstract]	'		'		'
Tier I Capital to Average Assets	7.38%		6.89%		'
Other Non-Bank Subsidiaries [Member]	'		'		'
Allowed dividends without regulatory approval	158,000,000		'		'
Perpetual stock [Member]	'		'		'
Preferred stock, authorized (in shares)	1,000,000,000		'		'
Preferred stock at par value (in dollars per share)	$0.00		'		'
Preferred stock conversion rate	'one share of Common Stock for each 36 shares of Series A Preferred Stock at the option of the holder		'		'
Preferred stock, Rate of annual cumulative dividends (in hundredths)	10.00%		'		'
Preferred stock, Liquidation preference per share	$0.06		'		'
Preferred stock, Aggregate liquidation preference	$15,000,000		'		'
Preferred Stock, Shares Outstanding	0		0		0
Common Stock [Member]	'		'		'
Common stock, authorized (in shares)	2,500,000,000		'		'
Common stock, par value (in dollars per share)	$0.00		'		'
Common stock, number of vote per share	$1		'		'
[1]	1 Calculated using 39% effective tax rate.

Reportable_Segments_Details

Reportable Segments (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]	'	'	'
Net interest revenue from external sources	$674,477	$707,549	$693,045
Net interest revenue (expense) from internal sources	0	0	0
Net interest revenue	674,477	707,549	693,045
Provision for credit losses	-27,900	-22,000	-6,050
Net interest revenue after provision for credit losses	702,377	729,549	699,095
Other operating revenue	614,472	653,678	528,538
Operating expense	840,620	840,363	779,298
Income before taxes	476,229	542,864	448,335
Federal and state income tax	157,298	188,740	158,511
Net income	318,931	354,124	289,824
Net income attributable to non-controlling interests	2,322	2,933	3,949
Net income attributable to BOK Financial Corp. shareholders	316,609	351,191	285,875
Average assets	27,381,094	26,289,150	24,494,861
Average invested capital	3,011,082	2,905,955	2,681,865
Performance measurements: [Abstract]	'	'	'
Return on average assets	1.16%	1.34%	1.17%
Return on average invested capital	10.51%	12.09%	10.66%
Efficiency ratio	65.03%	62.87%	63.83%
Operating Segments [Member] | Commercial [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net interest revenue from external sources	364,604	367,533	342,853
Net interest revenue (expense) from internal sources	-37,025	-43,438	-30,689
Net interest revenue	327,579	324,095	312,164
Provision for credit losses	-3,468	10,852	20,760
Net interest revenue after provision for credit losses	331,047	313,243	291,404
Other operating revenue	171,900	171,131	147,545
Operating expense	244,211	246,954	230,458
Income before taxes	258,736	237,420	208,491
Federal and state income tax	100,648	92,356	81,103
Net income	158,088	145,064	127,388
Net income attributable to non-controlling interests	0	0	0
Net income attributable to BOK Financial Corp. shareholders	158,088	145,064	127,388
Average assets	10,483,706	10,147,805	9,383,530
Average invested capital	906,716	882,037	884,171
Performance measurements: [Abstract]	'	'	'
Return on average assets	1.51%	1.43%	1.36%
Return on average invested capital	17.44%	16.45%	14.41%
Efficiency ratio	49.18%	51.36%	50.22%
Operating Segments [Member] | Consumer [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net interest revenue from external sources	99,509	101,029	102,854
Net interest revenue (expense) from internal sources	20,290	21,305	27,416
Net interest revenue	119,799	122,334	130,270
Provision for credit losses	4,628	9,198	13,598
Net interest revenue after provision for credit losses	115,171	113,136	116,672
Other operating revenue	216,828	262,908	182,875
Operating expense	226,852	248,767	239,302
Income before taxes	105,147	127,277	60,245
Federal and state income tax	40,902	49,511	23,435
Net income	64,245	77,766	36,810
Net income attributable to non-controlling interests	0	0	0
Net income attributable to BOK Financial Corp. shareholders	64,245	77,766	36,810
Average assets	5,669,580	5,726,564	5,937,584
Average invested capital	293,736	289,665	273,905
Performance measurements: [Abstract]	'	'	'
Return on average assets	1.13%	1.36%	0.62%
Return on average invested capital	21.87%	26.85%	13.44%
Efficiency ratio	66.62%	63.97%	73.06%
Operating Segments [Member] | Wealth Management [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net interest revenue from external sources	25,478	27,647	30,859
Net interest revenue (expense) from internal sources	20,061	21,456	16,540
Net interest revenue	45,539	49,103	47,399
Provision for credit losses	1,275	2,284	2,960
Net interest revenue after provision for credit losses	44,264	46,819	44,439
Other operating revenue	213,790	200,007	171,827
Operating expense	237,540	214,293	190,702
Income before taxes	20,514	32,533	25,564
Federal and state income tax	7,980	12,655	9,944
Net income	12,534	19,878	15,620
Net income attributable to non-controlling interests	0	0	0
Net income attributable to BOK Financial Corp. shareholders	12,534	19,878	15,620
Average assets	4,556,132	4,357,641	4,073,623
Average invested capital	203,914	184,707	174,877
Performance measurements: [Abstract]	'	'	'
Return on average assets	0.28%	0.46%	0.38%
Return on average invested capital	6.15%	10.76%	8.93%
Efficiency ratio	91.92%	86.23%	87.21%
Corporate, Non-Segment [Member] | Funds Management and Other [Member]	'	'	'
Segment Reporting Information [Line Items]	'	'	'
Net interest revenue from external sources	184,886	211,340	216,479
Net interest revenue (expense) from internal sources	-3,326	677	-13,267
Net interest revenue	181,560	212,017	203,212
Provision for credit losses	-30,335	-44,334	-43,368
Net interest revenue after provision for credit losses	211,895	256,351	246,580
Other operating revenue	11,954	19,632	26,291
Operating expense	132,017	130,349	118,836
Income before taxes	91,832	145,634	154,035
Federal and state income tax	7,768	34,218	44,029
Net income	84,064	111,416	110,006
Net income attributable to non-controlling interests	2,322	2,933	3,949
Net income attributable to BOK Financial Corp. shareholders	81,742	108,483	106,057
Average assets	6,671,676	6,057,140	5,100,124
Average invested capital	$1,606,716	$1,549,546	$1,348,912

Fair_Value_Measurements_Fair_V

Fair Value Measurements, Fair Value Of Financial Instruments as Measured On a Recurring Basis (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Assets [Abstract]	'		'		'	'
Trading securities	$91,616		$214,102		'	'
Available for sale securities	10,147,162		11,287,221		'	'
Fair value option securities	167,125		284,296		'	'
Residential mortgage loans held for sale	200,546		293,762		'	'
Mortgage servicing rights, net	153,333		100,812		86,783	115,723
Derivative contracts, net of cash margin, Assets, Fair Value	265,012		338,106		'	'
Liabilities [Abstract]	'		'		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185		283,589		'	'
U.S. Government agency debentures [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	34,120		16,545		'	'
U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	21,011		86,361		'	'
Available for sale securities	7,716,010		9,889,821		'	'
Fair value option securities	157,431		257,040		'	'
Municipal and other tax-exempt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	27,350		90,326		'	'
Available for sale securities	73,775		87,142		'	'
Other trading securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	9,135		20,870		'	'
US Treasury Securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	1,042		1,002		'	'
Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	221,099		325,163		'	'
Commercial mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	2,055,804		895,075		'	'
Other debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	35,241		36,389		'	'
Fair value option securities	9,694		770		'	'
Perpetual preferred stock [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	22,863		25,072		'	'
Equity securities and mutual funds [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	21,328		27,557		'	'
Corporate debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Fair value option securities	0		26,486		'	'
Fair Value, Measurements, Recurring [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	91,616		214,102		'	'
Available for sale securities	10,147,162		11,287,221		'	'
Fair value option securities	167,125		284,296		'	'
Residential mortgage loans held for sale	200,546		293,762		'	'
Mortgage servicing rights, net	153,333	[1]	100,812	[1]	'	'
Derivative contracts, net of cash margin, Assets, Fair Value	265,012	[2]	338,106	[3]	'	'
Other assets, private equity funds	27,341		28,169		'	'
Liabilities [Abstract]	'		'		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185	[2]	283,589	[3]	'	'
Fair Value, Measurements, Recurring [Member] | U.S. Government agency debentures [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	34,120		16,545		'	'
Fair Value, Measurements, Recurring [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	21,011		86,361		'	'
Available for sale securities	7,716,010		9,889,821		'	'
Fair value option securities	157,431		257,040		'	'
Fair Value, Measurements, Recurring [Member] | Municipal and other tax-exempt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	27,350		90,326		'	'
Available for sale securities	73,775		87,142		'	'
Fair Value, Measurements, Recurring [Member] | Other trading securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	9,135		20,870		'	'
Fair Value, Measurements, Recurring [Member] | US Treasury Securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	1,042		1,002		'	'
Fair Value, Measurements, Recurring [Member] | Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	221,099		325,163		'	'
Fair Value, Measurements, Recurring [Member] | Commercial mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	2,055,804		895,075		'	'
Fair Value, Measurements, Recurring [Member] | Other debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	35,241		36,389		'	'
Fair value option securities	9,694		770		'	'
Fair Value, Measurements, Recurring [Member] | Perpetual preferred stock [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	22,863		25,072		'	'
Fair Value, Measurements, Recurring [Member] | Equity securities and mutual funds [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	21,328		27,557		'	'
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Fair value option securities	'		26,486		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Available for sale securities	1,042		5,167		'	'
Fair value option securities	0		0		'	'
Residential mortgage loans held for sale	'		0		'	'
Mortgages Held-for-sale, Fair Value Disclosure	0		'		'	'
Mortgage servicing rights, net	0	[1]	0	[1]	'	'
Derivative contracts, net of cash margin, Assets, Fair Value	2,712	[2]	11,597	[3]	'	'
Other assets, private equity funds	0		0		'	'
Liabilities [Abstract]	'		'		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	0	[2]	0	[3]	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Government agency debentures [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Available for sale securities	0		0		'	'
Fair value option securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Municipal and other tax-exempt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other trading securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury Securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	1,042		1,002		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Commercial mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair value option securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Perpetual preferred stock [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity securities and mutual funds [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		4,165		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Fair value option securities	'		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	91,616		214,102		'	'
Available for sale securities	10,119,396		11,233,792		'	'
Fair value option securities	167,125		284,296		'	'
Residential mortgage loans held for sale	'		293,762		'	'
Mortgages Held-for-sale, Fair Value Disclosure	200,546		'		'	'
Mortgage servicing rights, net	0	[1]	0	[1]	'	'
Derivative contracts, net of cash margin, Assets, Fair Value	262,300	[2]	326,509	[3]	'	'
Other assets, private equity funds	0		0		'	'
Liabilities [Abstract]	'		'		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185	[2]	283,589	[3]	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Government agency debentures [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	34,120		16,545		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	21,011		86,361		'	'
Available for sale securities	7,716,010		9,889,821		'	'
Fair value option securities	157,431		257,040		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal and other tax-exempt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	27,350		90,326		'	'
Available for sale securities	55,970		46,440		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	9,135		20,870		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury Securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	221,099		325,163		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	2,055,804		895,075		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	30,529		30,990		'	'
Fair value option securities	9,694		770		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Perpetual preferred stock [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	22,863		25,072		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity securities and mutual funds [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	17,121		21,231		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Fair value option securities	'		26,486		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Available for sale securities	26,724		48,262		'	'
Fair value option securities	0		0		'	'
Residential mortgage loans held for sale	'		0		'	'
Mortgages Held-for-sale, Fair Value Disclosure	0		'		'	'
Mortgage servicing rights, net	153,333	[1]	100,812	[1]	'	'
Derivative contracts, net of cash margin, Assets, Fair Value	0	[2]	0	[3]	'	'
Other assets, private equity funds	27,341		28,169		'	'
Liabilities [Abstract]	'		'		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	0	[2]	0	[3]	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Government agency debentures [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Available for sale securities	0		0		'	'
Fair value option securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Municipal and other tax-exempt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Available for sale securities	17,805		40,702		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Trading securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury Securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Commercial mortgage-backed securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	4,712		5,399		'	'
Fair value option securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Perpetual preferred stock [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Available for sale securities	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate debt securities [Member]	'		'		'	'
Assets [Abstract]	'		'		'	'
Fair value option securities	'		$0		'	'
[1]	A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 7, Mortgage Banking Activities.
[2]	See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets or identical instruments (Level 1) are exchange-traded energy derivative contracts, net of cash margin.
[3]	See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts based on quoted prices in active markets for identical instruments (Level 1) are exchange-traded energy and agricultural derivative contracts, net of cash margin.

Fair_Value_Measurements_Measur

Fair Value Measurements, Measured On Recurring Basis Significant Unobservable Inputs (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Balance at beginning of period	$40,702	$42,353
Transfers to Level 3 from Level 2	0	0
Purchases and capital calls	0	0
Redemptions and distributions	-19,238	-988
Other comprehensive gain (loss)	-3,506	-22
Balance at end of period	17,805	40,702
Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member] | Gain (loss) on assets [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member] | Gain on available for sale securities, net [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	1,216	1
Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member] | Other-than-temporary impairment losses [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	-1,369	-642
Available for sale Securities [Member] | Other debt securities [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Balance at beginning of period	5,399	5,900
Transfers to Level 3 from Level 2	0	0
Purchases and capital calls	0	0
Redemptions and distributions	-500	-500
Other comprehensive gain (loss)	-187	-1
Balance at end of period	4,712	5,399
Available for sale Securities [Member] | Other debt securities [Member] | Gain (loss) on assets [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Available for sale Securities [Member] | Other debt securities [Member] | Gain on available for sale securities, net [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Available for sale Securities [Member] | Other debt securities [Member] | Other-than-temporary impairment losses [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Available for sale Securities [Member] | Equity securities and mutual funds [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Balance at beginning of period	2,161	0
Transfers to Level 3 from Level 2	0	2,161
Purchases and capital calls	0	0
Redemptions and distributions	0	0
Other comprehensive gain (loss)	2,046	0
Balance at end of period	4,207	2,161
Available for sale Securities [Member] | Equity securities and mutual funds [Member] | Gain (loss) on assets [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Available for sale Securities [Member] | Equity securities and mutual funds [Member] | Gain on available for sale securities, net [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Available for sale Securities [Member] | Equity securities and mutual funds [Member] | Other-than-temporary impairment losses [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Other Assets [Member] | Private equity funds [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Balance at beginning of period	28,169	30,902
Transfers to Level 3 from Level 2	0	0
Purchases and capital calls	1,415	3,446
Redemptions and distributions	-5,294	-9,819
Other comprehensive gain (loss)	0	0
Balance at end of period	27,341	28,169
Other Assets [Member] | Private equity funds [Member] | Gain (loss) on assets [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	3,051	3,640
Other Assets [Member] | Private equity funds [Member] | Gain on available for sale securities, net [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	0	0
Other Assets [Member] | Private equity funds [Member] | Other-than-temporary impairment losses [Member]	'	'
Fair Value Assets Measured on Recurring Basis Unobservable Reconciliation [Roll Forward]	'	'
Gain (loss) recognized in earnings	$0	$0

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value Measurements, Financial Instruments Measured On a Recurring Basis, Quantitative Information (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Available for sale securities	$10,147,162		$11,287,221
Municipal and other tax-exempt securities [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Available for sale securities	73,775		87,142
Other debt securities [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Available for sale securities	35,241		36,389
Fair Value, Inputs, Level 3 [Member] | Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Asset, Par Value	'		45,570
Fair Value Inputs, Asset, Amortized Cost	'		40,857	[1]
Fair Value Inputs, Asset, Fair Value	'		40,702
Fair Value, Inputs, Level 3 [Member] | Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member] | External Credit Rating, Investment Grade [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Asset, Par Value	18,695		28,570
Fair Value Inputs, Asset, Amortized Cost	18,624		28,473	[1]
Fair Value Inputs, Asset, Fair Value	17,805		28,318
Fair Value Measurements, Valuation Techniques	'Discounted cash flows	[2]	'Discounted cash flows	[2]
Fair Value Measurements, Significant Unobservable Input	'Interest rate spread		'Interest rate spread
Fair Value Inputs, Assets, Discount Rate, Minimum	4.97%	[3]	1.00%	[4]
Fair Value Inputs, Assets, Discount Rate, Maximum	5.27%	[3]	1.50%	[4]
Fair Value Inputs, Assets, Discount Rate, Weighted Average	5.16%	[3]	1.25%	[4]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Minimum	95.02%	[5]	98.83%	[5]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Maximum	95.50%	[5]	99.43%	[5]
Fair Value Inputs, Fair Value As Percentage of Par Value, Weighted Average	95.24%	[5]	99.12%	[5]
Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Minimum	467		75
Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Maximum	518		80
Additional Decrease in Fair Value From a 100 Basis Point Increase in Interest Rate Spread	-172		'
Fair Value, Inputs, Level 3 [Member] | Available for sale Securities [Member] | Municipal and other tax-exempt securities [Member] | External Credit Rating, Non Investment Grade [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Asset, Par Value	'		17,000
Fair Value Inputs, Asset, Amortized Cost	'		12,384	[1]
Fair Value Inputs, Asset, Fair Value	'		12,384
Fair Value Measurements, Valuation Techniques	'		'Discounted cash flows	[2]
Fair Value Measurements, Significant Unobservable Input	'		'Interest rate spread
Fair Value Inputs, Assets, Discount Rate, Minimum	'		7.21%
Fair Value Inputs, Assets, Discount Rate, Maximum	'		9.83%
Fair Value Inputs, Assets, Discount Rate, Weighted Average	'		7.82%
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Minimum	'		72.79%	[5]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Maximum	'		73.00%	[5]
Fair Value Inputs, Fair Value As Percentage of Par Value, Weighted Average	'		72.85%	[5]
Below Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities	'		700
Fair Value, Inputs, Level 3 [Member] | Available for sale Securities [Member] | Other debt securities [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Asset, Par Value	4,900		5,400
Fair Value Inputs, Asset, Amortized Cost	4,900		5,400	[1]
Fair Value Inputs, Asset, Fair Value	4,712		5,399
Fair Value Measurements, Valuation Techniques	'Discounted cash flows	[2]	'Discounted cash flows	[2]
Fair Value Measurements, Significant Unobservable Input	'Interest rate spread		'Interest rate spread
Fair Value Inputs, Assets, Discount Rate, Minimum	5.67%	[6]	1.65%	[7]
Fair Value Inputs, Assets, Discount Rate, Maximum	5.67%	[6]	1.71%	[7]
Fair Value Inputs, Assets, Discount Rate, Weighted Average	5.67%	[6]	1.70%	[7]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Minimum	96.16%	[5]	100.00%	[5]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Maximum	96.16%	[5]	100.00%	[5]
Fair Value Inputs, Fair Value As Percentage of Par Value, Weighted Average	96.16%	[5]	100.00%	[5]
Average Yields On Comparable Short-term Taxable Securities Maximum	1.00%		1.00%
Additional Decrease in Fair Value From a 100 Basis Point Increase in Interest Rate Spread	-36		'
Fair Value, Inputs, Level 3 [Member] | Available for sale Securities [Member] | Equity securities and mutual funds [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Fair Value Inputs, Asset, Amortized Cost	2,420		2,420
Available for sale securities	$4,207		$2,161
Fair Value Measurements, Valuation Techniques	'Publicly announced preliminary purchase price information from acquirer.	[2]	'Tangible book value per share of publicly traded financial institutions of similar size, less liquidity discount.
Fair Value Measurements, Significant Unobservable Input	'Discount for settlement uncertainty.		'Peer group tangible book per share and liquidity discount
Fair Value Inputs, Assets, Liquidity Discount	'		20.00%
Fair Value, Inputs, Level 3 [Member] | Other assets - private equity funds [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Fair Value Measurements, Valuation Techniques	'Net asset value reported by underlying fund		'Net asset value reported by underlying fund
Fair Value Measurements, Significant Unobservable Input	'Net asset value reported by underlying fund		'Net asset value reported by underlying fund
[1]	Amortized cost reduced by other-than-temporary impairments recorded in earnings. See Note 2 for additional discussion.
[2]	Discounted cash flows developed using discount rates primarily based on reference to interest rate spreads for comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies, adjusted for lack of trading volume
[3]	Interest rate yields used to value investment grade tax-exempt securities represent a spread of 467 to 518 basis points over average yields for comparable tax-exempt securities.
[4]	Interest rate yields used to value investment grade tax-exempt securities represent a spread of 75 to 80 basis points over average yields for comparable tax-exempt securities.
[5]	Represents fair value as a percentage of par value
[6]	Fair value of shares of a smaller privately-held financial institution were valued using preliminary announced purchase information by a publicly-traded acquirer.
[7]	Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 1%.

Fair_Value_Measurements_Fair_V2

Fair Value Measurements, Fair Value Measured On a Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Impaired Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Gross charge-offs against allowance for loan losses	$6,598	$11,615
Net losses and expenses of repossessed assets, net	0	0
Real estate and other repossessed assets [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Gross charge-offs against allowance for loan losses	0	0
Net losses and expenses of repossessed assets, net	5,489	15,954
Fair Value, Inputs, Level 1 [Member] | Impaired Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Fair Value, Inputs, Level 1 [Member] | Real estate and other repossessed assets [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets, Fair Value Disclosure, Nonrecurring	0	0
Fair Value, Inputs, Level 2 [Member] | Impaired Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets, Fair Value Disclosure, Nonrecurring	8,380	21,589
Fair Value, Inputs, Level 2 [Member] | Real estate and other repossessed assets [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets, Fair Value Disclosure, Nonrecurring	20,733	39,077
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets, Fair Value Disclosure, Nonrecurring	4,622	3,891
Fair Value, Inputs, Level 3 [Member] | Real estate and other repossessed assets [Member]	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Assets, Fair Value Disclosure, Nonrecurring	$191	$4,421

Fair_Value_Measurements_Fair_V3

Fair Value Measurements Fair Value Measurement, Measured On Non-Recurring Basis, Signfiicant Unobservable Inputs, Quantitative Information (Details) (Fair Value, Measurements, Nonrecurring [Member], Fair Value, Inputs, Level 3 [Member], USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Impaired Loans [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Assets, Fair Value Disclosure, Nonrecurring	$4,622		$3,891
Fair Value Measurements, Valuation Techniques	'Appraised value, as adjusted		'Appraised value, as adjusted
Fair Value Measurements, Significant Unobservable Input	'Broker quotes and management's knowledge of industry and collateral.		'Broker quotes and management's knowledge of industry and collateral.
Real estate and other repossessed assets [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Assets, Fair Value Disclosure, Nonrecurring	191		4,421
Fair Value Measurements, Valuation Techniques	'Listing value, less cost to sell		'Listing value, less cost to sell
Fair Value Measurements, Significant Unobservable Input	'Marketability adjustments off appraised value		'Marketability adjustments off appraised value
Fair Value Measurement, Percentage of Appraised Value, Minimum	80.00%	[1]	58.00%	[2]
Fair Value Measurement, Percentage of Appraised Value, Maximum	85.00%	[1]	85.00%	[2]
Fair Value Measurement, Percentage of Appraised Value, Weighted Average	82.00%	[1]	76.00%	[2]
Fair Value Measurement, Fair Value With No Third Party Appraisal	'		$345
[1]	Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value.
[2]	Marketability adjustments includes consideration of estimated costs to sell which is approximately 15% of the fair value. In addition, $345 thousand of real estate and other repossessed assets at December 31, 2012 are based on uncorroborated expert opinions or management's knowledge of the collateral or industry and do not have an independently appraised value.

Fair_Value_Measurements_Financ

Fair Value Measurements, Financial Instruments (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011	Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Cash and due from banks	$512,931,000		$710,739,000		'	'
Interest-bearing cash and cash equivalents	574,282,000		575,500,000		'	'
Trading securities	91,616,000		214,102,000		'	'
Investment securities	677,878,000	[1]	499,534,000	[2]	'	'
Available for sale securities	10,147,162,000		11,287,221,000		'	'
Fair value option securities	167,125,000		284,296,000		'	'
Residential mortgage loans held for sale	200,546,000		293,762,000		'	'
Loans	12,792,264,000		12,311,456,000		'	'
Allowance for loan losses	-185,396,000		-215,507,000		-253,481,000	-292,971,000
Loans, net of allowance	12,606,868,000		12,095,949,000		'	'
Mortgage servicing rights, net	153,333,000		100,812,000		86,783,000	115,723,000
Derivative contracts, net of cash margin, Assets, Fair Value	265,012,000		338,106,000		'	'
Time deposits	2,695,993,000		2,967,992,000		'	'
Subordinated debentures	347,802,000		347,633,000		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185,000		283,589,000		'	'
Fair Value Assumptions and Methodology for Assets and Liabilities [Abstract]	'		'		'	'
Specific allocation of allowance for loan losses included in fair value of loans	157,000,000		171,000,000		'	'
Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	7,943,221,000		7,641,912,000		'	'
Allowance for loan losses	-79,180,000		-65,280,000		-83,443,000	-104,631,000
Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2,415,353,000		2,228,999,000		'	'
Allowance for loan losses	-41,573,000		-54,884,000		-67,034,000	-98,709,000
Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2,052,026,000		2,045,040,000		'	'
Allowance for loan losses	-29,465,000		-41,703,000		-46,476,000	-50,281,000
Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	381,664,000		395,505,000		'	'
Allowance for loan losses	-6,965,000		-9,453,000		-10,178,000	-12,614,000
U.S. Government agency debentures [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	34,120,000		16,545,000		'	'
U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	21,011,000		86,361,000		'	'
Investment securities	50,182,000		82,767,000		'	'
Available for sale securities	7,716,010,000		9,889,821,000		'	'
Fair value option securities	157,431,000		257,040,000		'	'
Municipal and other tax-exempt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	27,350,000		90,326,000		'	'
Investment securities	440,187,000		232,700,000		'	'
Available for sale securities	73,775,000		87,142,000		'	'
Other trading securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	9,135,000		20,870,000		'	'
US Treasury Securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	1,042,000		1,002,000		'	'
Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	221,099,000		325,163,000		'	'
Commercial mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	2,055,804,000		895,075,000		'	'
Other debt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Investment securities	187,509,000		184,067,000		'	'
Available for sale securities	35,241,000		36,389,000		'	'
Fair value option securities	9,694,000		770,000		'	'
Perpetual preferred stock [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	22,863,000		25,072,000		'	'
Equity securities and mutual funds [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	21,328,000		27,557,000		'	'
Corporate debt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Fair value option securities	0		26,486,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Cash and due from banks	512,931,000		710,739,000		'	'
Interest-bearing cash and cash equivalents	574,282,000		575,500,000		'	'
Trading securities	91,616,000		214,102,000		'	'
Investment securities	677,878,000		499,534,000		'	'
Available for sale securities	10,147,162,000		11,287,221,000		'	'
Fair value option securities	167,125,000		284,296,000		'	'
Residential mortgage loans held for sale	334,250,000		293,762,000		'	'
Loans	12,792,264,000		12,311,456,000		'	'
Allowance for loan losses	-185,396,000		-215,507,000		'	'
Loans, net of allowance	12,606,868,000		12,095,949,000		'	'
Mortgage servicing rights, net	153,333,000		100,812,000		'	'
Derivative contracts, net of cash margin, Assets, Fair Value	265,012,000		338,106,000		'	'
Other assets, private equity funds	27,341,000		28,169,000		'	'
Deposits with no stated maturity	17,573,334,000		18,211,068,000		'	'
Time deposits	2,695,993,000		2,967,992,000		'	'
Other borrowings	2,721,888,000		2,706,221,000		'	'
Subordinated debentures	347,802,000		347,633,000		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185,000		283,589,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	7,943,221,000		7,641,912,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2,415,353,000		2,228,999,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2,052,026,000		2,045,040,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	381,664,000		395,505,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Government agency debentures [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	34,120,000		16,545,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	21,011,000		86,361,000		'	'
Investment securities	50,182,000		82,767,000		'	'
Available for sale securities	7,716,010,000		9,889,821,000		'	'
Fair value option securities	157,431,000		257,040,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Municipal and other tax-exempt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	27,350,000		90,326,000		'	'
Investment securities	440,187,000		232,700,000		'	'
Available for sale securities	73,775,000		87,142,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	9,135,000		20,870,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | US Treasury Securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	1,042,000		1,002,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	221,099,000		325,163,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	2,055,804,000		895,075,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Investment securities	187,509,000		184,067,000		'	'
Available for sale securities	35,241,000		36,389,000		'	'
Fair value option securities	9,694,000		770,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Perpetual preferred stock [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	22,863,000		25,072,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Equity securities and mutual funds [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	21,328,000		27,557,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Fair value option securities	0		26,486,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Cash and due from banks	512,931,000		710,739,000		'	'
Interest-bearing cash and cash equivalents	574,282,000		575,500,000		'	'
Trading securities	91,616,000		214,102,000		'	'
Investment securities	687,127,000		528,458,000		'	'
Available for sale securities	10,147,162,000		11,287,221,000		'	'
Fair value option securities	167,125,000		284,296,000		'	'
Residential mortgage loans held for sale	200,546,000		293,762,000		'	'
Loans	12,674,420,000		12,314,243,000		'	'
Allowance for loan losses	0		0		'	'
Loans, net of allowance	12,674,420,000		12,314,243,000		'	'
Mortgage servicing rights, net	153,333,000		100,812,000		'	'
Derivative contracts, net of cash margin, Assets, Fair Value	265,012,000		338,106,000		'	'
Other assets, private equity funds	27,341,000		28,169,000		'	'
Deposits with no stated maturity	17,573,334,000		18,211,068,000		'	'
Time deposits	2,697,290,000		3,441,610,000		'	'
Other borrowings	2,693,788,000		2,369,224,000		'	'
Subordinated debentures	344,783,000		411,243,000		'	'
Derivative contracts, net of cash margin, Liabilities, Fair Value	247,185,000		283,589,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	7,835,325,000		7,606,505,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2,394,443,000		2,208,217,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2,068,690,000		2,110,773,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	375,962,000		388,748,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Government agency debentures [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	34,120,000		16,545,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	21,011,000		86,361,000		'	'
Investment securities	51,864,000		85,943,000		'	'
Available for sale securities	7,716,010,000		9,889,821,000		'	'
Fair value option securities	157,431,000		257,040,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Municipal and other tax-exempt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	27,350,000		90,326,000		'	'
Investment securities	439,870,000		235,940,000		'	'
Available for sale securities	73,775,000		87,142,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Trading securities	9,135,000		20,870,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | US Treasury Securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	1,042,000		1,002,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Privately issued residential mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	221,099,000		325,163,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial mortgage-backed securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	2,055,804,000		895,075,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Investment securities	195,393,000		206,575,000		'	'
Available for sale securities	35,241,000		36,389,000		'	'
Fair value option securities	9,694,000		770,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Perpetual preferred stock [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	22,863,000		25,072,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Equity securities and mutual funds [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Available for sale securities	21,328,000		27,557,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Corporate debt securities [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Fair value option securities	0		26,486,000		'	'
Contractual Yield, Minimum [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Time deposits	0.0001		0.0001		'	'
Other borrowings	0.0025		0.0009		'	'
Subordinated debentures	0.0095		0.01		'	'
Contractual Yield, Minimum [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0004		0.0021		'	'
Contractual Yield, Minimum [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0038		0.0021		'	'
Contractual Yield, Minimum [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0038		0.0038		'	'
Contractual Yield, Minimum [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0038		0.0038		'	'
Contractual Yield, Maximum [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Time deposits	0.0964		0.0964		'	'
Other borrowings	0.0478		0.0525		'	'
Subordinated debentures	0.05		0.05		'	'
Contractual Yield, Maximum [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.3		0.3		'	'
Contractual Yield, Maximum [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.18		0.18		'	'
Contractual Yield, Maximum [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.18		0.18		'	'
Contractual Yield, Maximum [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.21		0.21		'	'
Average Repricing [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Time deposits	2.12		2.15		'	'
Other borrowings	0.03		0		'	'
Subordinated debentures	2.63		3.56		'	'
Average Repricing [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.49		0.69		'	'
Average Repricing [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.78		0.92		'	'
Average Repricing [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	2.63		3.34		'	'
Average Repricing [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.55		0.32		'	'
Discount Rate, Minimum [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Time deposits	0.0075		0.008		'	'
Other borrowings	0.0008		0.0009		'	'
Subordinated debentures	0.0222		0.024		'	'
Discount Rate, Minimum [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0048		0.0051		'	'
Discount Rate, Minimum [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0121		0.0126		'	'
Discount Rate, Minimum [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0059		0.0086		'	'
Discount Rate, Minimum [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0122		0.0137		'	'
Discount Rate, Maximum [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Time deposits	0.0133		0.0115		'	'
Other borrowings	0.0264		0.0267		'	'
Subordinated debentures	0.0222		0.024		'	'
Discount Rate, Maximum [Member] | Commercial [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0433		0.0359		'	'
Discount Rate, Maximum [Member] | Commercial Real Estate [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0349		0.0318		'	'
Discount Rate, Maximum [Member] | Residential Mortgage [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	0.0473		0.0309		'	'
Discount Rate, Maximum [Member] | Consumer [Member]	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'		'	'
Loans	$0.04		$0.04		'	'
[1]	Carrying value includes $1.8 million of net unrealized gain which remains in Accumulated other comprehensive income (“AOCI”) in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.
[2]	Carrying value includes $5.0 million of net unrealized gain which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred from the Available for Sale securities portfolio to the Investment securities portfolio as discussed in greater detail following.

Parent_Company_Only_Financial_2

Parent Company Only Financial Statements Parent Company Only Financial Statements (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Assets [Abstract]	'	'	'	'
Cash and cash equivalents	$1,087,213	$1,286,239	$986,365	'
Available for sale securities	10,147,162	11,287,221	'	'
Other assets	359,894	324,153	'	'
Total assets	27,015,432	28,148,631	'	'
Liabilities and Shareholders' Equity [Abstract]	'	'	'	'
Other liabilities	133,647	164,316	'	'
Total liabilities	23,960,459	25,154,950	'	'
Shareholders' equity: [Abstract]	'	'	'	'
Common stock	4	4	'	'
Capital surplus	898,586	859,278	'	'
Retained earnings	2,349,428	2,137,541	'	'
Treasury stock	-202,346	-188,883	'	'
Accumulated other comprehensive income (loss)	-25,623	149,920	128,979	107,839
Total shareholders' equity	3,020,049	2,957,860	'	'
Total liabilities and equity	27,015,432	28,148,631	'	'
Income Statement [Abstract]	'	'	'	'
Other revenue	38,262	34,604	34,070	'
Net impairment losses recognized in earnings	-2,308	-7,351	-23,507	'
Interest expense	70,894	87,322	120,101	'
Professional fees and services	32,552	34,015	28,798	'
Other operating expense	840,620	840,363	779,298	'
Federal and state income tax	157,298	188,740	158,511	'
Net income attributable to BOK Financial Corp. shareholders	316,609	351,191	285,875	'
Cash Flows From Operating Activities:	'	'	'	'
Net income	318,931	354,124	289,824	'
Adjustments to net income to cash provided by operating activities [Abstract]	'	'	'	'
Tax benefit (expense) on exercise of stock options	-2,210	-120	-659	'
Change in other assets	-76,257	-10,999	-16,469	'
Change in other liabilities	-13,735	-3,729	-50,198	'
Net cash provided by operating activities	736,320	591,550	327,788	'
Cash Flows From Investing Activities:	'	'	'	'
Purchases of available for sale securities	-4,287,146	-7,334,843	-7,504,261	'
Proceeds from sales of available for sale securities	2,436,093	1,744,662	2,725,760	'
Acquisitions, net of cash acquired	-7,500	-23,615	0	'
Net cash provided by (used in) investing activities	437,029	-2,368,347	-1,564,144	'
Net Cash Used in Financing Activities [Abstract]	'	'	'	'
Issuance of common and treasury stock, net	16,566	14,650	14,541	'
Tax benefit on exercise of stock options	2,210	120	659	'
Dividends paid	-104,722	-166,982	-76,423	'
Repurchase of common stock	0	-20,558	-26,446	'
Net cash used in financing activities	-1,372,375	2,076,671	953,317	'
Net increase in cash and cash equivalents	-199,026	299,874	-283,039	'
Cash and cash equivalents at beginning of period	1,286,239	986,365	1,269,404	'
Cash and cash equivalents at end of period	1,087,213	1,286,239	986,365	'
Cash paid for interest	69,830	90,137	122,166	'
Parent Company [Member]	'	'	'	'
Assets [Abstract]	'	'	'	'
Cash and cash equivalents	561,297	457,514	386,695	'
Available for sale securities	27,526	44,881	'	'
Investments in subsidiaries	2,426,495	2,464,729	'	'
Other assets	12,872	4,324	'	'
Total assets	3,028,190	2,971,448	'	'
Liabilities and Shareholders' Equity [Abstract]	'	'	'	'
Other liabilities	8,141	13,588	'	'
Total liabilities	8,141	13,588	'	'
Shareholders' equity: [Abstract]	'	'	'	'
Common stock	4	4	'	'
Capital surplus	898,586	859,278	'	'
Retained earnings	2,349,428	2,137,541	'	'
Treasury stock	-202,346	-188,883	'	'
Accumulated other comprehensive income (loss)	-25,623	149,920	'	'
Total shareholders' equity	3,020,049	2,957,860	'	'
Total liabilities and equity	3,028,190	2,971,448	'	'
Income Statement [Abstract]	'	'	'	'
Dividends, interest and fees received from subsidiaries	225,340	275,330	270,474	'
Other revenue	3,341	2,295	2,128	'
Net impairment losses recognized in earnings	0	-1,099	-2,098	'
Total revenue	228,681	276,526	270,504	'
Interest expense	292	269	354	'
Professional fees and services	811	765	538	'
Other operating expense	3,272	3,099	7,688	'
Total expenses	4,375	4,133	8,580	'
Income before taxes and equity in undistributed income of subsidiaries	224,306	272,393	261,924	'
Federal and state income tax	-1,578	-1,706	-3,169	'
Income before equity in undistributed earnings of subsidiaries	225,884	274,099	265,093	'
Equity in undistributed income of subsidiaries	90,725	77,092	20,782	'
Net income attributable to BOK Financial Corp. shareholders	316,609	351,191	285,875	'
Cash Flows From Operating Activities:	'	'	'	'
Net income	316,609	351,191	285,875	'
Adjustments to net income to cash provided by operating activities [Abstract]	'	'	'	'
Equity in undistributed income of subsidiaries	-90,725	-77,092	-20,782	'
Tax benefit (expense) on exercise of stock options	-2,210	-120	-659	'
Change in other assets	-8,308	4,237	15,249	'
Change in other liabilities	4,263	-4,965	-18,225	'
Net cash provided by operating activities	219,629	273,251	261,458	'
Cash Flows From Investing Activities:	'	'	'	'
Purchases of available for sale securities	0	-5,343	-3,797	'
Proceeds from sales of available for sale securities	13,600	4,781	16,500	'
Investment in subsidiaries	-36,000	-9,100	-7,250	'
Acquisitions, net of cash acquired	-7,500	-20,000	0	'
Net cash provided by (used in) investing activities	-29,900	-29,662	5,453	'
Net Cash Used in Financing Activities [Abstract]	'	'	'	'
Issuance of common and treasury stock, net	16,566	14,650	14,541	'
Tax benefit on exercise of stock options	2,210	120	659	'
Dividends paid	-104,722	-166,982	-76,423	'
Repurchase of common stock	0	-20,558	-26,446	'
Net cash used in financing activities	-85,946	-172,770	-87,669	'
Net increase in cash and cash equivalents	103,783	70,819	179,242	'
Cash and cash equivalents at beginning of period	457,514	386,695	207,453	'
Cash and cash equivalents at end of period	561,297	457,514	386,695	'
Cash paid for interest	$292	$269	$354	'