BOK Financial (BOKF) 10-Q 1 Nov 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	9 Months Ended
	Sep. 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	$1,679,070,454
Entity Common Stock, Shares Outstanding	68,787,584
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'Q3
Document Type	'10-Q
Amendment Flag	'false
Document Period End Date	30-Sep-13

Consolidated_Statements_of_Ear

Consolidated Statements of Earnings (Unaudited) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest revenue [Abstract]	'	'	'	'
Loans	$125,069	$126,248	$374,479	$384,406
Residential mortgage loans held for sale	2,168	2,310	6,254	5,862
Trading securities	509	555	1,608	1,219
Taxable securities	3,434	4,124	10,836	12,840
Tax-exempt securities	1,163	764	3,341	2,662
Total investment securities	4,597	4,888	14,177	15,502
Taxable securities	50,179	59,482	156,569	180,721
Tax-exempt securities	560	699	1,851	1,931
Total available for sale securities	50,739	60,181	158,420	182,652
Fair value option securities	802	1,886	2,980	7,684
Funds sold and resell agreements	6	3	12	9
Total interest revenue	183,890	196,071	557,930	597,334
Interest expense [Abstract]	'	'	'	'
Deposits	13,526	15,917	42,316	49,805
Borrowed funds	1,804	1,652	5,134	5,033
Subordinated debentures	2,209	2,475	6,568	11,539
Total interest expense	17,539	20,044	54,018	66,377
Net interest revenue	166,351	176,027	503,912	530,957
Provision for credit losses	-8,500	0	-16,500	-8,000
Net interest revenue after provision for credit losses	174,851	176,027	520,412	538,957
Other operating revenue [Abstract]	'	'	'	'
Brokerage and trading revenue	32,338	31,261	96,963	94,972
Transaction card revenue	30,055	27,788	87,689	79,976
Trust fees and commissions	23,892	19,654	71,008	58,023
Deposit service charges and fees	24,742	25,148	71,670	74,743
Mortgage banking revenue	23,486	50,266	100,058	122,892
Bank-owned life insurance	2,408	2,707	7,870	8,416
Other revenue	9,852	9,149	30,535	27,273
Total fees and commissions	146,773	165,973	465,793	466,295
Gain (loss) on assets, net	-377	452	-1,576	-1,552
Gain (loss) on derivatives, net	31	464	-3,437	336
Gain (loss) on fair value option securities, net	-80	6,192	-12,407	11,311
Gain on available for sale securities, net	478	7,967	9,086	32,779
Total other-than-temporary impairment losses	-1,436	0	-2,574	-640
Portion of loss recognized in (reclassified from) other comprehensive income	-73	-1,104	266	-5,044
Net impairment losses recognized in earnings	-1,509	-1,104	-2,308	-5,684
Total other operating revenue	145,316	179,944	455,151	503,485
Other operating expense [Abstract]	'	'	'	'
Personnel	125,799	122,775	379,563	359,841
Business promotion	5,355	6,054	16,578	17,188
Contribution to BOKF Foundation	2,062	0	2,062	0
Professional fees and services	7,183	7,991	22,549	23,933
Net occupancy and equipment	17,280	16,914	50,670	49,843
Insurance	3,939	3,690	11,728	11,567
Data processing and communications	25,695	26,486	77,879	73,894
Printing, postage and supplies	3,505	3,611	10,759	10,825
Net losses and operating expenses of repossessed assets	2,014	5,706	3,542	13,863
Amortization of intangible assets	835	742	2,586	1,862
Mortgage banking costs	8,753	13,036	24,017	33,792
Change in fair value of mortgage servicing rights	346	9,576	-16,627	13,899
Other expense	7,878	5,759	23,268	16,980
Total other operating expense	210,644	222,340	608,574	627,487
Net income before taxes	109,523	133,631	366,989	414,955
Federal and state income taxes	33,461	45,778	121,980	144,447
Net income	76,062	87,853	245,009	270,508
Net income (loss) attributable to non-controlling interest	324	471	1,376	1,882
Net income attributable to BOK Financial Corporation shareholders	$75,738	$87,382	$243,633	$268,626
Earnings per share: [Abstract]	'	'	'	'
Basic (in dollars per share)	$1.10	$1.28	$3.55	$3.94
Diluted (in dollars per share)	$1.10	$1.27	$3.54	$3.92
Average shares used in computation: [Abstract]	'	'	'	'
Basic (in shares)	68,049,179	67,966,700	67,953,253	67,704,343
Diluted (in shares)	68,272,861	68,334,989	68,175,915	67,981,558
Dividends declared per share (in dollars per share)	$0.38	$0.38	$1.14	$1.09

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Statement of Comprehensive Income [Abstract]	'	'	'		'
Net income	$76,062	$87,853	$245,009		$270,508
Other comprehensive income before income taxes: [Abstract]	'	'	'		'
Net change in unrealized gain (loss)	-35,839	46,064	-240,384		86,098
Reclassification adjustments included in earnings [Abstract]	'	'	'		'
Interest revenue, Investment securities, Taxable securities	-696	-2,009	-2,717		-5,430
Interest expense, Subordinated debentures	85	68	209		399
Net impairment losses recognized in earnings	1,509	1,104	2,308		5,684
Gain on available for sale securities, net	-478	-7,967	-9,086		-32,779
Other comprehensive income (loss), before income taxes	-35,419	37,260	-249,670		53,972
Income tax benefit (expense)	13,779	-14,057	97,124	[1]	-20,558	[1]
Other comprehensive income (loss), net of income taxes	-21,640	23,203	-152,546		33,414
Comprehensive income	54,422	111,056	92,463		303,922
Comprehensive income attributable to non-controlling interests	324	471	1,376		1,882
Comprehensive income attributed to BOK Financial Corp. shareholders	$54,098	$110,585	$91,087		$302,040
[1]	Calculated using a 39% effective tax rate.

Consolidated_Balance_Sheets_Un

Consolidated Balance Sheets (Unaudited) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
In Thousands, unless otherwise specified
Assets [Abstract]	'		'		'
Cash and due from banks	$1,133,771		$1,266,834		$596,590
Funds sold and resell agreements	27,214		19,405		18,904
Trading securities	150,887		214,102		204,242
Investment securities	644,225	[1]	499,534	[2]	432,114	[3]
Available for sale securities	10,372,903		11,287,221		11,506,434
Fair value option securities	167,860		284,296		331,887
Residential mortgage loans held for sale	230,511		293,762		325,102
Loans	12,350,100		12,311,456		11,832,367
Allowance for loan losses	-194,325		-215,507		-233,756
Loans, net of allowance	12,155,775		12,095,949		11,598,611
Premises and equipment, net	275,347		265,920		259,195
Receivables	108,435		114,185		116,243
Goodwill	359,759		361,979		358,962
Intangible assets, net	25,407		28,192		33,196
Mortgage servicing rights, net	140,863		100,812		89,653
Real estate and other repossessed assets, net of allowance	108,122		103,791		104,128
Bankers' acceptances	748		605		1,605
Derivative contracts	377,325		338,106		435,653
Cash surrender value of bank-owned life insurance	282,490		274,531		271,830
Receivable on unsettled securities sales	93,020		211,052		32,480
Other assets	511,705		388,355		400,812
Total assets	27,166,367		28,148,631		27,117,641
Deposits [Abstract]	'		'		'
Noninterest-bearing demand deposits	7,331,976		8,038,286		6,848,401
Interest-bearing deposits: [Abstract]	'		'		'
Transaction	9,119,810		9,888,038		9,002,567
Savings	319,849		284,744		269,573
Time	2,720,020		2,967,992		3,022,326
Total deposits	19,491,655		21,179,060		19,142,867
Funds purchased	992,345		1,167,416		1,680,626
Repurchase agreements	782,418		887,030		1,109,696
Other borrowings	1,837,181		651,775		639,254
Subordinated debentures	347,758		347,633		347,592
Accrued interest, taxes and expense	182,076		176,678		182,410
Bankers' acceptances	748		605		1,605
Derivative contracts	232,544		283,589		254,422
Due on unsettled securities purchases	114,259		297,453		556,998
Other liabilities	158,409		163,711		189,696
Total liabilities	24,139,393		25,154,950		24,105,166
Shareholders' equity: [Abstract]	'		'		'
Common stock	4		4		4
Capital surplus	890,433		859,278		849,390
Retained earnings	2,303,688		2,137,541		2,148,292
Treasury stock	-200,255		-188,883		-184,422
Accumulated other comprehensive income (loss)	-2,626		149,920		162,393
Total shareholders' equity	2,991,244		2,957,860		2,975,657
Non-controlling interest	35,730		35,821		36,818
Total equity	3,026,974		2,993,681		3,012,475
Total liabilities and equity	$27,166,367		$28,148,631		$27,117,641
[1]	Carrying value includes $2.3 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 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.
[3]	Carrying value includes $6.2 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.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
In Thousands, except Share data, unless otherwise specified
Investment securities [Abstract]	'	'	'
Investment securities, fair value	$654,479	$528,458	$460,358
Real estate and other repossessed assets, Valuation allowance	$26,910	$36,873	$35,979
Shareholders' equity: [Abstract]	'	'	'
Common stock, par value (in dollars per share)	$0.00	$0.00	$0.00
Common stock, shares authorized (in shares)	2,500,000,000	2,500,000,000	2,500,000,000
Common stock, shares issued (in shares)	73,089,764	72,415,346	72,223,473
Common stock, shares outstanding (in shares)	73,089,764	72,415,346	72,223,473
Treasury stock, shares at cost (in shares)	4,302,180	4,087,995	4,008,119

Consolidated_Statements_of_Cha

Consolidated Statements of Changes in Equity (Unaudited) (USD $)	Total	Common Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total Shareholders' Equity [Member]	Non-Controlling Interest [Member]
In Thousands
Balance, beginning of period at Dec. 31, 2011	$2,786,652	$4	$128,979	$818,817	$1,953,332	($150,664)	$2,750,468	$36,184
Balance, beginning of period (in shares) at Dec. 31, 2011	'	71,533	'	'	'	3,380	'	'
Net income	270,508	'	'	'	268,626	'	268,626	1,882
Other comprehensive income (loss)	33,414	'	33,414	'	'	'	33,414	'
Treasury stock purchases (in shares)	'	'	'	'	'	384	'	'
Treasury stock purchases	-20,558	'	'	'	'	-20,558	-20,558	'
Exercise of stock options (in shares)	'	690	'	'	'	244	'	'
Exercise of stock options	11,526	'	'	24,726	'	-13,200	11,526	'
Tax benefit on exercise of stock options	-487	'	'	-487	'	'	-487	'
Stock-based compensation	6,334	'	'	6,334	'	'	6,334	'
Cash dividends on common stock	-73,666	'	'	'	-73,666	'	-73,666	'
Issuance of non-controlling interest in subsidiary	1,645	'	'	'	'	'	'	1,645
Capital calls and distributions, net	-2,893	'	'	'	'	'	'	-2,893
Balance, end of period at Sep. 30, 2012	3,012,475	4	162,393	849,390	2,148,292	-184,422	2,975,657	36,818
Balance, end of period (in shares) at Sep. 30, 2012	'	72,223	'	'	'	4,008	'	'
Balance, beginning of period at Dec. 31, 2012	2,993,681	4	149,920	859,278	2,137,541	-188,883	2,957,860	35,821
Balance, beginning of period (in shares) at Dec. 31, 2012	'	72,415	'	'	'	4,088	'	'
Net income	245,009	'	'	'	243,633	'	243,633	1,376
Other comprehensive income (loss)	-152,546	'	-152,546	'	'	'	-152,546	'
Treasury stock purchases (in shares)	'	'	'	'	'	0	'	'
Treasury stock purchases	0	'	'	'	'	0	0	'
Exercise of stock options (in shares)	'	675	'	'	'	214	'	'
Exercise of stock options	14,945	'	'	26,317	'	-11,372	14,945	'
Tax benefit on exercise of stock options	301	'	'	301	'	'	301	'
Stock-based compensation	4,537	'	'	4,537	'	'	4,537	'
Cash dividends on common stock	-77,486	'	'	'	-77,486	'	-77,486	'
Issuance of non-controlling interest in subsidiary	0	'	'	'	'	'	'	0
Capital calls and distributions, net	-1,467	'	'	'	'	'	'	-1,467
Balance, end of period at Sep. 30, 2013	$3,026,974	$4	($2,626)	$890,433	$2,303,688	($200,255)	$2,991,244	$35,730
Balance, end of period (in shares) at Sep. 30, 2013	'	73,090	'	'	'	4,302	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (Unaudited) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities:	'	'
Net income	$245,009	$270,508
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Provision for credit losses	-16,500	-8,000
Change in fair value of mortgage servicing rights	-16,627	13,899
Unrealized (gains) losses from derivatives	23,270	-2,665
Tax benefit on exercise of stock options	-301	487
Change in bank-owned life insurance	-7,870	-8,416
Stock-based compensation	4,537	6,334
Depreciation and amortization	40,820	37,452
Net amortization of securities discounts and premiums	47,468	68,579
Net realized gains on financial instruments and other assets	-7,917	-19,631
Net gain on mortgage loans held for sale	-79,045	-85,262
Mortgage loans originated for resale	-3,232,520	-2,634,809
Proceeds from sale of mortgage loans held for resale	3,364,095	2,590,960
Capitalized mortgage servicing rights	-39,157	-29,754
Change in trading and fair value option securities	177,953	189,182
Change in receivables	7,716	7,328
Change in other assets	58,311	-5,747
Change in accrued interest, taxes and expense	5,398	29,220
Change in other liabilities	-5,676	28,980
Net cash provided by operating activities	568,964	448,645
Cash Flows From Investing Activities:	'	'
Proceeds from maturities or redemptions of investment securities	113,570	67,571
Proceeds from maturities or redemptions of available for sale securities	2,197,656	3,444,670
Purchases of investment securities	-261,629	-60,542
Purchases of available for sale securities	-3,708,188	-6,412,356
Proceeds from sales of available for sale securities	2,140,531	1,660,876
Change in amount receivable on unsettled securities transactions	118,032	42,671
Loans originated net of principal collected	-27,426	-594,261
Net payments on derivative asset contracts	-67,707	-108,296
Acquisitions, net of cash acquired	0	-28,671
Proceeds from disposition of assets	80,678	135,760
Purchases of assets	-120,539	-77,032
Net cash provided by (used in) investing activities	464,978	-1,929,610
Cash Flows From Financing Activities:	'	'
Net change in demand deposits, transaction deposits and savings accounts	-1,439,433	739,943
Net change in time deposits	-247,972	-359,656
Net change in other borrowed funds	817,105	974,189
Repayment of subordinated debt	0	-53,787
Net proceeds on derivative liability contracts	61,764	90,646
Net change in derivative margin accounts	-105,226	-101,683
Change in amount due on unsettled security transactions	-183,194	-96,373
Issuance of common and treasury stock, net	14,945	11,526
Tax benefit on exercise of stock options	301	-487
Repurchase of common stock	0	-20,558
Dividends paid	-77,486	-73,666
Net cash provided by (used in) financing activities	-1,159,196	1,110,094
Net decrease in cash and cash equivalents	-125,254	-370,871
Cash and cash equivalents at beginning of period	1,286,239	986,365
Cash and cash equivalents at end of period	1,160,985	615,494
Cash paid for interest	51,689	66,819
Cash paid for taxes	104,589	113,663
Net loans and bank premises transferred to repossessed real estate and other assets	73,075	97,142
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period	88,618	84,520
Conveyance of other real estate owned guaranteed by U.S. government agencies	$31,641	$65,344

Significant_Accounting_Policie

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Significant Accounting Policies	'
	(1) Significant Accounting Policies
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements of BOK Financial Corporation (“BOK Financial” or “the Company”) have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
	The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA (“the Bank”), BOSC, Inc., The Milestone Group, Inc. and Cavanal Hill Investment Management Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Arizona, Bank of Arkansas, Bank of Oklahoma, Bank of Texas, Colorado State Bank and Trust, Bank of Kansas City, BOK Financial Mortgage and the TransFund electronic funds network.
	Certain reclassifications have been made to conform to the current period presentation.
	The financial information should be read in conjunction with BOK Financial’s 2012 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2012 have been derived from the audited financial statements included in BOK Financial’s 2012 Form 10-K but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements.  Operating results for the three-month and nine-month periods ended September 30, 2013 are not necessarily indicative of the results that may be expected for the year ending December 31, 2013.
	Newly Adopted and Pending Accounting Policies
	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 financial statements prepared under International Financial Reporting Standards by providing information about gross and net exposures. The new disclosure requirements were effective for the Company for interim and annual reporting period beginning 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 the scope of ASU 2011-11 applied for derivative contracts accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and securities borrowing and lending transactions 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.

Securities

Securities	9 Months Ended
	Sep. 30, 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):
			September 30, 2013								December 31, 2012								September 30, 2012
			Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain (Loss)				Fair				Net Unrealized Gain (Loss)
																			Value
	U.S. Government agency debentures		$	74,632			$	(598	)		$	16,545			$	(57	)		$	3,100			$	1
	U.S. agency residential mortgage-backed securities		26,129				456				86,361				447				119,835				566
	Municipal and other tax-exempt securities		37,057				81				90,326				(226		)		58,150				118
	Other trading securities		13,069				(25		)		20,870				(13		)		23,157				(1		)
	Total		$	150,887			$	(86	)		$	214,102			$	151			$	204,242			$	684
	Investment Securities
	The amortized cost and fair values of investment securities are as follows (in thousands):
			September 30, 2013
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	409,542			$	409,542			$	407,562			$	2,316			$	(4,296	)
	U.S. agency residential mortgage-backed securities – Other		53,858				56,182				58,442				2,260				—
	Other debt securities		178,501				178,501				188,475				10,094				(120		)
	Total		$	641,901			$	644,225			$	654,479			$	14,670			$	(4,416	)
	1	Carrying value includes $2.3 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 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.
			September 30, 2012
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	155,144			$	155,144			$	159,464			$	4,329			$	(9	)
	U.S. agency residential mortgage-backed securities – Other		85,699				91,911				95,128				3,356				(139		)
	Other debt securities		185,059				185,059				205,766				20,737				(30		)
	Total		$	425,902			$	432,114			$	460,358			$	28,422			$	(178	)
	1	Carrying value includes $6.2 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.
	During the three months ended September 30, 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 September 30, 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		$	28,674			$	277,808			$	93,703			$	9,357			$	409,542			3.92
	Fair value		28,928				276,908				92,195				9,531				407,562
	Nominal yield¹		3.35		%		1.52		%		2.29		%		2.74		%		1.85		%
	Other debt securities:
	Carrying value		9,631				32,542				35,539				100,789				178,501				8.78
	Fair value		9,647				32,883				36,445				109,500				188,475
	Nominal yield		3.98		%		5.08		%		5.51		%		6.27		%		5.78		%
	Total fixed maturity securities:
	Carrying value		$	38,305			$	310,350			$	129,242			$	110,146			$	588,043			5.39
	Fair value		38,575				309,791				128,640				119,031				596,037
	Nominal yield		3.51		%		1.9		%		3.17		%		5.97		%		3.04		%
	Residential mortgage-backed securities:
	Carrying value																		$	56,182			³
	Fair value																		58,442
	Nominal yield4																		2.73		%
	Total investment securities:
	Carrying value																		$	644,225
Fair value																		654,479
Nominal yield																		3.02		%
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 4.2 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):
		September 30, 2013
		Amortized				Fair				Gross Unrealized1
		Cost				Value				Gain				Loss				OTTI²
U.S. Treasury		$	1,052			$	1,052			$	—			$	—			$	—
Municipal and other tax-exempt		93,897				95,440				2,792				(1,249		)		—
Residential mortgage-backed securities:
U. S. government agencies:
FNMA		4,513,161				4,544,505				81,984				(50,640		)		—
FHLMC		2,412,948				2,412,116				30,673				(31,505		)		—
GNMA		978,361				984,065				11,054				(5,350		)		—
Other		38,979				40,701				1,722				—				—
Total U.S. government agencies		7,943,449				7,981,387				125,433				(87,495		)		—
Private issue:
Alt-A loans		109,234				109,592				2,970				—				(2,612		)
Jumbo-A loans		118,312				121,308				3,816				(138		)		(682		)
Total private issue		227,546				230,900				6,786				(138		)		(3,294		)
Total residential mortgage-backed securities		8,170,995				8,212,287				132,219				(87,633		)		(3,294		)
Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,985,924				1,946,295				354				(39,983		)		—
Other debt securities		35,091				35,362				459				(188		)		—
Perpetual preferred stock		22,171				23,680				1,534				(25		)		—
Equity securities and mutual funds		56,348				58,787				2,479				(40		)		—
Total		$	10,365,478			$	10,372,903			$	139,837			$	(129,118	)		$	(3,294	)
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.
		September 30, 2012
		Amortized				Fair				Gross Unrealized1
		Cost				Value				Gain				Loss				OTTI²
U.S. Treasury		$	1,000			$	1,002			$	2			$	—			$	—
Municipal and other tax-exempt		86,326				87,969				2,760				(152		)		(965		)
Residential mortgage-backed securities:
U. S. government agencies:
FNMA		5,740,232				5,900,174				161,314				(1,372		)		—
FHLMC		3,322,692				3,400,215				77,523				—				—
GNMA		1,151,058				1,181,134				30,076				—				—
Other		167,262				173,298				6,036				—				—
Total U.S. government agencies		10,381,244				10,654,821				274,949				(1,372		)		—
Private issue:
Alt-A loans		128,090				123,583				663				—				(5,170		)
Jumbo-A loans		208,900				208,139				3,617				(152		)		(4,226		)
Total private issue		336,990				331,722				4,280				(152		)		(9,396		)
Total residential mortgage-backed securities		10,718,234				10,986,543				279,229				(1,524		)		(9,396		)
Commercial mortgage-backed securities guaranteed by U.S. government agencies		336,130				339,095				3,271				(306		)		—
Other debt securities		35,710				36,456				746				—				—
Perpetual preferred stock		22,170				25,288				3,118				—				—
Equity securities and mutual funds		25,409				30,081				4,998				(326		)		—
Total		$	11,224,979			$	11,506,434			$	294,124			$	(2,308	)		$	(10,361	)
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 September 30, 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
																					Maturity5
U.S. Treasuries:
Amortized cost	$	1,052			$	—			$	—			$	—			$	1,052			1.42
Fair value	1,052				—				—				—				1,052
Nominal yield	0.24		%		—		%		—		%		—		%		0.24		%
Municipal and other tax-exempt:
Amortized cost	$	1,379			$	34,349			$	5,446			$	52,723			$	93,897			14.5
Fair value	1,404				35,542				5,689				52,805				95,440
Nominal yield¹	—		%		0.97		%		0.51		%		2.62		%	6	1.85		%
Commercial mortgage-backed securities:
Amortized cost	$	—			$	520,499			$	1,150,637			$	314,788			$	1,985,924			10.18
Fair value	—				514,668				1,121,936				309,691				1,946,295
Nominal yield	—		%		1.11		%		1.37		%		1.36		%		1.3		%
Other debt securities:
Amortized cost	$	—			$	30,191			$	—			$	4,900			$	35,091			5.56
Fair value	—				30,650				—				4,712				35,362
Nominal yield	—		%		1.8		%		—		%		1.54		%	6	1.77		%
Total fixed maturity securities:
Amortized cost	$	2,431			$	585,039			$	1,156,083			$	372,411			$	2,115,964			10.29
Fair value	2,456				580,860				1,127,625				367,208				2,078,149
Nominal yield	—		%		1.13		%		1.36		%		1.54		%		1.33		%
Residential mortgage-backed securities:
Amortized cost																	$	8,170,995			2
Fair value																	8,212,287
Nominal yield4																	1.92		%
Equity securities and mutual funds:
Amortized cost																	$	78,519			³
Fair value																	82,467
Nominal yield																	0.7		%
Total available-for-sale securities:
Amortized cost																	$	10,365,478
Fair value																	10,372,903
Nominal yield																	1.79		%
1	Calculated on a taxable equivalent basis using a 39% effective tax rate.
2	The average expected lives of mortgage-backed securities were 3.5 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):
	Three Months Ended								Nine Months Ended
	September 30,								September 30,
	2013				2012				2013				2012
Proceeds	$	355,650			$	209,325			$	2,140,531			$	1,660,876
Gross realized gains	3,164				7,967				18,948				40,133
Gross realized losses	(2,686		)		—				(9,862		)		(7,354		)
Related federal and state income tax expense	184				3,099				3,533				12,751
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):
	September 30,				December 31,				September 30,
	2013				2012				2012
Investment:
Carrying value	$	92,442			$	117,346			$	153,224
Fair value	95,658				121,647				158,899
Available for sale:
Amortized cost	5,020,732				4,070,250				3,634,955
Fair value	5,009,611				4,186,390				3,763,664
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. There were no securities pledged under this line of credit at September 30, 2013 or September 30, 2012.
Temporarily Impaired Securities as of September 30, 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		136			$	257,359			$	4,292			$	803			$	4			$	258,162			$	4,296
U.S. Agency residential mortgage-backed securities – Other		—			—				—				—				—				—				—
Other debt securities		29			1,326				59				780				61				2,106				120
Total investment		165			$	258,685			$	4,351			$	1,583			$	65			$	260,268			$	4,416
		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:
U.S. Treasury		—			$	—			$	—			$	—			$	—			$	—			$	—
Municipal and other tax-exempt1		46			$	20,274			$	352			$	19,575			$	897			$	39,849			$	1,249
Residential mortgage-backed securities:
U. S. agencies:
FNMA		79			2,328,213				50,640				—				—				2,328,213				50,640
FHLMC		46			1,402,010				31,505				—				—				1,402,010				31,505
GNMA		23			674,512				5,350				—				—				674,512				5,350
Total U.S. agencies		148			4,404,735				87,495				—				—				4,404,735				87,495
Private issue1:
Alt-A loans		10			11,336				707				48,849				1,905				60,185				2,612
Jumbo-A loans		10			15,326				682				11,742				138				27,068				820
Total private issue		20			26,662				1,389				60,591				2,043				87,253				3,432
Total residential mortgage-backed securities		168			4,431,397				88,884				60,591				2,043				4,491,988				90,927
Commercial mortgage-backed securities guaranteed by U.S. government agencies		116			1,803,008				39,983				—				—				1,803,008				39,983
Other debt securities		3			4,712				188				—				—				4,712				188
Perpetual preferred stocks		1			4,975				25				—				—				4,975				25
Equity securities and mutual   funds		97			1,529				40				—				—				1,529				40
Total available for sale		431			$	6,265,895			$	129,472			$	80,166			$	2,940			$	6,346,061			$	132,412
1Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:
Municipal and other tax-exempt		—			$	—			$	—			$	—			$	—			$	—			$	—
Alt-A loans		10			11,336				707				48,849				1,905				60,185				2,612
Jumbo-A loans		9			15,326				682				—				—				15,326				682
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:
Municipal and other tax-exempt		—			$	—			$	—			$	—			$	—			$	—			$	—
Alt-A loans		12			$	—			$	—			$	87,907			$	2,580			$	87,907			$	2,580
Jumbo-A loans		10			—				—				29,128				1,602				29,128				1,602
Temporarily Impaired Securities as of September 30, 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		6			$	7,548			$	9			$	—			$	—			$	7,548			$	9
U.S. Agency residential mortgage-backed securities – Other		1			—				—				19,066				139				19,066				139
Other debt securities		14			871				30				—				—				871				30
Total investment		21			$	8,419			$	39			$	19,066			$	139			$	27,485			$	178
		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-exempt1		51			$	13,492			$	970			$	27,485			$	147			$	40,977			$	1,117
Residential mortgage-backed securities:
U. S. agencies:
FNMA		12			483,258				1,372				—				—				483,258				1,372
FHLMC		—			—				—				—				—				—				—
GNMA		—			—				—				—				—				—				—
Total U.S. agencies		12			483,258				1,372				—				—				483,258				1,372
Private issue1:
Alt-A loans		13			—				—				105,862				5,170				105,862				5,170
Jumbo-A loans		15			—				—				121,746				4,378				121,746				4,378
Total private issue		28			—				—				227,608				9,548				227,608				9,548
Total residential mortgage-backed securities		40			483,258				1,372				227,608				9,548				710,866				10,920
Commercial mortgage-backed securities guaranteed by U.S. government agencies		8			42,445				306				—				—				42,445				306
Other debt securities		—			—				—				—				—				—				—
Perpetual preferred stocks		—			—				—				—				—				—				—
Equity securities and mutual funds		2			2,551				326				—				—				2,551				326
Total available for sale		101			$	541,746			$	2,974			$	255,093			$	9,695			$	796,839			$	12,669
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:
Municipal and other tax-exempt		21			$	12,431			$	965			$	—			$	—			$	12,431			$	965
Alt-A loans		13			—				—				105,862				5,170				105,862				5,170
Jumbo-A loans		14			—				—				107,071				4,226				107,071				4,226
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 September 30, 2013, the Company recorded a $1.4 million impairment related to certain municipal securities, which the Company now intends to sell prior to recovery of its amortized cost based on a tentative settlement offer from the securities issuer. We do not intend to sell any other 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 are 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 September 30, 2013.
At September 30, 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		$	—			$	—			$	275,067			$	271,781			$	21,162			$	21,405			$	—	$	—	$	113,313	$	114,376	$	409,542	$	407,562
Mortgage-backed securities -- other		56,182				58,442				—				—				—				—				—		—		—		—		56,182		58,442
Other debt securities		—				—				167,463				177,502				—				—				—		—		11,038		10,973		178,501		188,475
Total investment securities		$	56,182			$	58,442			$	442,530			$	449,283			$	21,162			$	21,405			$	—	$	—	$	124,351	$	125,349	$	644,225	$	654,479
		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		$	1,052			$	1,052			$	—			$	—			$	—			$	—			$	—	$	—	$	—	$	—	$	1,052	$	1,052
Municipal and other tax-exempt		—				—				47,747				48,564				15,819				15,525				17,924		19,140		12,407		12,211		93,897		95,440
Residential mortgage-backed securities:
U. S. government agencies:
FNMA		4,513,161				4,544,505				—				—				—				—				—		—		—		—		4,513,161		4,544,505
FHLMC		2,412,948				2,412,116				—				—				—				—				—		—		—		—		2,412,948		2,412,116
GNMA		978,361				984,065				—				—				—				—				—		—		—		—		978,361		984,065
Other		38,979				40,701				—				—				—				—				—		—		—		—		38,979		40,701
Total U.S. government agencies		7,943,449				7,981,387				—				—				—				—				—		—		—		—		7,943,449		7,981,387
Private issue:
Alt-A loans		—				—				—				—				—				—				109,234		109,592		—		—		109,234		109,592
Jumbo-A loans		—				—				—				—				—				—				118,312		121,308		—		—		118,312		121,308
Total private issue		—				—				—				—				—				—				227,546		230,900		—		—		227,546		230,900
Total residential mortgage-backed securities		7,943,449				7,981,387				—				—				—				—				227,546		230,900		—		—		8,170,995		8,212,287
Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,985,924				1,946,295				—				—				—				—				—		—		—		—		1,985,924		1,946,295
Other debt securities		—				—				4,900				4,712				30,191				30,650				—		—		—		—		35,091		35,362
Perpetual preferred stock		—				—				—				—				11,406				11,822				10,765		11,858		—		—		22,171		23,680
Equity securities and mutual funds		—				—				4				441				—				—				—		—		56,344		58,346		56,348		58,787
Total available for sale securities		$	9,930,425			$	9,928,734			$	52,651			$	53,717			$	57,416			$	57,997			$	256,235	$	261,898	$	68,751	$	70,557	$	10,365,478	$	10,372,903
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 September 30, 2013, the entire portfolio of privately issued residential mortgage-backed securities was rated below investment grade. The gross unrealized loss on these securities totaled $3.4 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 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, decreases in housing prices and estimated liquidation costs at foreclosure.
The primary assumptions used in this evaluation were:
	September 30,		December 31,		September 30,
	2013		2012		2012
Unemployment rate	Increasing to 7.5% over the next 12 months and remain at 7.5% thereafter		Increasing to 8.5% over the next 12 months, dropping to 8% over the following 21 months and holding at 8% 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 5% 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.		Starting with current depreciated housing prices based on information derived from the FHFA1, depreciating 2% over the next 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.		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.		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 senior or 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 senior or super-senior tranches which effectively increased 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 is 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 $139 thousand of additional credit loss impairments in earnings during the three months ended September 30, 2013.
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
													Three months ended
													September 30, 2013							Life-to-date
		Number of Securities			Amortized Cost				Fair Value				Number of			Amount				Number of Securities			Amount
													Securities
Alt-A		16			$	109,234			$	109,592			1			$	139			16			$	49,126
Jumbo-A		29			118,312				121,308				—			—				29			18,220
Total		45			$	227,546			$	230,900			1			$	139			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. Accordingly, all impairment of equity securities was considered temporary at September 30, 2013.
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):
		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2013				2012				2013				2012
Balance of credit-related OTTI recognized on available for sale debt, beginning of period		$	76,027			$	72,915			$	75,228			$	76,131
Additions for credit-related OTTI not previously recognized		67				—				619				248
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		73				1,104				320				5,436
Reductions for change in intent to hold before recovery		(3,589		)		—				(3,589		)		—
Sales		(5,232		)		—				(5,232		)		(7,796		)
Balance of credit-related OTTI recognized on available for sale debt securities, end of period		$	67,346			$	74,019			$	67,346			$	74,019
Additions above exclude other-than-temporary impairment recorded due to change in intent to hold before recovery.
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):
		September 30, 2013								December 31, 2012								September 30, 2012
		Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain				Fair				Net Unrealized Gain
																		Value
U.S. agency residential mortgage-backed securities		$	163,567			$	(5,365	)		$	257,040			$	3,314			$	305,445			$	13,827
Corporate debt securities		—				—				26,486				1,409				26,442				1,359
Other securities		4,293				1				770				47				—				—
Total		$	167,860			$	(5,364	)		$	284,296			$	4,770			$	331,887			$	15,186

Derivatives

Derivatives	9 Months Ended
	Sep. 30, 2013
Derivative Instrument Detail [Abstract]	'
Derivatives [Text Block]	'
	(3) Derivatives
	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 and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value.
	When bilateral netting agreements or similar arrangements 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 derivative contract type by counterparty basis.
	Derivative contracts may 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. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral, in the event of default is reasonably assured. As of September 30, 2013, a decrease in BOK Financial's credit rating to below investment grade would increase our obligation to post cash margin on existing contracts by approximately $27 million.
	None of these derivative contracts have been designated as hedging instruments.
	Customer Risk Management Programs
	BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, and foreign exchange rates, or to take positions in derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans or to-be-announced securities used by mortgage banking customers to hedge their loan production. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize its risk of 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.
	Interest Rate Risk Management Programs
	BOK Financial may use derivative contracts in managing its interest rate sensitivity and as part of its economic hedge of the change in the fair value of mortgage servicing rights. Interest rate swaps are generally used to reduce overall asset sensitivity by converting specific fixed-rate liabilities to floating-rate based on LIBOR. As of September 30, 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 5, 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 5 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.
	The following table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at September 30, 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		$	12,455,689		$	224,392		$	(99,970	)	$	124,422	$	(5,191	)	$	119,231
	Interest rate swaps		1,361,499			49,183			—			49,183		—			49,183
	Energy contracts		1,412,238			73,293			(42,078		)	31,215		(606		)	30,609
	Agricultural contracts		262,770			5,783			(3,430		)	2,353		—			2,353
	Foreign exchange contracts		164,970			164,970			—			164,970		—			164,970
	Equity option contracts		212,452			14,339			—			14,339		(3,360		)	10,979
	Total customer risk management programs		15,869,618			531,960			(145,478		)	386,482		(9,157		)	377,325
	Interest rate risk management programs		—			—			—			—		—			—
	Total derivative contracts		$	15,869,618		$	531,960		$	(145,478	)	$	386,482	$	(9,157	)	$	377,325
			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		$	12,529,704		$	221,720		$	(99,970	)	$	121,750	$	(118,166	)	$	3,584
	Interest rate swaps		1,361,499			49,518			—			49,518		(21,240		)	28,278
	Energy contracts		1,400,542			71,971			(42,078		)	29,893		(10,762		)	19,131
	Agricultural contracts		261,782			5,731			(3,430		)	2,301		(2,242		)	59
	Foreign exchange contracts		164,455			164,455			—			164,455		—			164,455
	Equity option contracts		212,452			14,339			—			14,339		—			14,339
	Total customer risk management programs		15,930,434			527,734			(145,478		)	382,256		(152,410		)	229,846
	Interest rate risk management programs		47,000			2,698			—			2,698		—			2,698
	Total derivative contracts		$	15,977,434		$	530,432		$	(145,478	)	$	384,954	$	(152,410	)	$	232,544
	1	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
	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
			Notional			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
			Notional			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 table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at September 30, 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		$	14,858,520		$	276,678		$	(121,573	)	$	155,105	$	(7,287	)	$	147,818
Interest rate swaps		1,301,109			79,350			—			79,350		—			79,350
Energy contracts		1,556,164			105,588			(67,030		)	38,558		(3,866		)	34,692
Agricultural contracts		198,735			6,835			(6,011		)	824		—			824
Foreign exchange contracts		150,232			150,232			—			150,232		—			150,232
Equity option contracts		217,283			14,460			—			14,460		—			14,460
Total customer risk management programs		18,282,043			633,143			(194,614		)	438,529		(11,153		)	427,376
Interest rate risk management programs		66,000			8,277			—			8,277		—			8,277
Total derivative contracts		$	18,348,043		$	641,420		$	(194,614	)	$	446,806	$	(11,153	)	$	435,653
		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		$	14,738,232		$	274,195		$	(121,573	)	$	152,622	$	(143,945	)	$	8,677
Interest rate swaps		1,301,109			79,937			—			79,937		(37,841		)	42,096
Energy contracts		1,596,791			107,556			(67,030		)	40,526		(2,836		)	37,690
Agricultural contracts		195,068			6,750			(6,011		)	739		—			739
Foreign exchange contracts		149,977			149,977			—			149,977		—			149,977
Equity option contracts		217,283			14,460			—			14,460		—			14,460
Total customer risk management programs		18,198,460			632,875			(194,614		)	438,261		(184,622		)	253,639
Interest rate risk management programs		25,000			783			—			783		—			783
Total derivative contracts		$	18,223,460		$	633,658		$	(194,614	)	$	439,044	$	(184,622	)	$	254,422
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 income statement (in thousands):
		Three Months Ended
		September 30, 2013						September 30, 2012
		Brokerage			Gain (Loss)			Brokerage			Gain (Loss)
		and Trading Revenue			on Derivatives, Net			and Trading			on Derivatives,
								Revenue			Net
Customer Risk Management Programs:
Interest rate contracts
To-be-announced residential mortgage-backed securities		$	(2,078	)	$	—		$	(803	)	$	—
Interest rate swaps		679			—			706			—
Energy contracts		1,682			—			1,856			—
Agricultural contracts		69			—			115			—
Foreign exchange contracts		192			—			124			—
Equity option contracts		—			—			—			—
Total customer risk management programs		544			—			1,998			—
Interest Rate Risk Management Programs		—			31			—			464
Total Derivative Contracts		$	544		$	31		$	1,998		$	464
		Nine Months Ended
		September 30, 2013						September 30, 2012
		Brokerage			Gain (Loss)			Brokerage			Gain (Loss)
		and Trading Revenue			on Derivatives, Net			and Trading			on Derivatives,
								Revenue			Net
Customer Risk Management Programs:
Interest rate contracts
To-be-announced residential mortgage-backed securities		$	(377	)	$	—		$	504		$	—
Interest rate swaps		2,214			—			2,850			—
Energy contracts		5,901			—			6,754			—
Agricultural contracts		254			—			298			—
Foreign exchange contracts		552			—			455			—
Equity option contracts		—			—			—			—
Total customer risk management programs		8,544			—			10,861			—
Interest Rate Risk Management Programs		—			(3,437		)	—			336
Total Derivative Contracts		$	8,544		$	(3,437	)	$	10,861		$	336
Net interest revenue was not significantly impacted by the settlement of amounts receivable or payable on interest rate swaps for the nine months ended September 30, 2013 and 2012, respectively.

Loans_and_Allowances_for_Credi

Loans and Allowances for Credit Losses	9 Months Ended
	Sep. 30, 2013
Loans Receivable, Net [Abstract]	'
Loans [Text Block]	'
	(4) Loans and Allowances for Credit Losses
	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 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 mortgage loans guaranteed by U.S. government agencies, are as follows.
	Interest is accrued at the applicable interest rate on the principal amount outstanding. 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 more than 90 days 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 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 value, debt service ratio and other underwriting standards. Nonaccruing loans may 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 a quarterly evaluation of available cash resources and collateral value and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 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 may have 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 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 the 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 based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.
	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 credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company’s method for monitoring and assessing credit risk.
	Portfolio segments of the loan portfolio are as follows (in thousands):
			September 30, 2013																December 31, 2012
			Fixed				Variable				Non-accrual				Total				Fixed				Variable				Non-accrual			Total
			Rate				Rate												Rate				Rate
	Commercial		$	4,209,349			$	3,342,204			$	19,522			$	7,571,075			$	4,158,548			$	3,458,897			$	24,467		$	7,641,912
	Commercial real estate		869,346				1,427,381				52,502				2,349,229				845,023				1,323,350				60,626			2,228,999
	Residential mortgage		1,766,819				228,690				39,256				2,034,765				1,747,038				251,394				46,608			2,045,040
	Consumer		137,193				256,214				1,624				395,031				175,412				217,384				2,709			395,505
	Total		$	6,982,707			$	5,254,489			$	112,904			$	12,350,100			$	6,926,021			$	5,251,025			$	134,410		$	12,311,456
	Accruing loans past due (90 days)1														$	188														$	3,925
			September 30, 2012
			Fixed				Variable				Non-accrual				Total
			Rate				Rate
	Commercial		$	3,889,382			$	3,355,763			$	21,762			$	7,266,907
	Commercial real estate		880,535				1,220,976				75,761				2,177,272
	Residential mortgage		1,728,220				258,816				29,267				2,016,303
	Consumer		181,614				185,162				5,109				371,885
	Total		$	6,679,751			$	5,020,717			$	131,899			$	11,832,367
	Accruing loans past due (90 days)1														$	1,181
	1	Excludes residential mortgage loans guaranteed by agencies of the U.S. government
	At September 30, 2013, $5.1 billion or 41% of the total loan portfolio is to businesses and individuals attributed to the Oklahoma market and $4.1 billion or 33% of our total loan portfolio is to businesses and individuals attributed to the Texas market. These geographic concentrations subject the loan portfolio to the general economic conditions within these areas.
	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 September 30, 2013, commercial loans attributed to the Oklahoma market totaled $2.8 billion or 37% of the commercial loan portfolio segment and commercial loans attributed to the Texas market totaled $2.9 billion or 38% of the commercial loan portfolio segment.
	The commercial loan portfolio segment is further divided into loan classes. The energy loan class totaled $2.3 billion or 19% of total loans at September 30, 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 $2.1 billion at September 30, 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 gaming, educational, public finance, insurance and community foundations.
	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 September 30, 2013, 36% of commercial real estate loans are secured by properties primarily located in the Dallas and Houston areas of Texas. An additional 24% of commercial real estate loans are secured by properties located primarily in the Tulsa and Oklahoma City metropolitan areas of Oklahoma.
	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 September 30, 2013, residential mortgage loans included $164 million 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 $792 million at September 30, 2013. Approximately, 70% of the home equity loan portfolio is comprised of first lien loans and 30% of the home equity portfolio is comprised of junior lien loans. Junior lien loans are distributed 75% to amortizing term loans and 25% 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 a 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.
	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 September 30, 2013, outstanding commitments totaled $7.2 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 September 30, 2013, outstanding standby letters of credit totaled $440 million. Commercial letters of credit are used to facilitate customer trade transactions with the drafts being drawn when the underlying transaction is consummated. At September 30, 2013, outstanding commercial letters of credit totaled $12 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 5, the Company also has separate accruals for 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 appropriateness of the allowance for loan losses and accrual for off-balance sheet credit losses (collectively "allowance for credit losses") is assessed by management based on an on-going quarterly evaluation of the probable estimated losses inherent in the portfolio, including probable losses on both outstanding loans and unused commitments.
	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, risk concentration and related factors. There have been no material changes in the approach or techniques utilized in developing the allowance for loan losses and the accrual for off-balance sheet credit losses for the three and nine months ended September 30, 2013.
	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 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 or modified in a TDR 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. Collateral value of real property 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 are generally not adjusted by the Company. Updated appraisals are obtained at least annually or more frequently if market conditions indicate collateral values have declined. Collateral value of mineral rights is generally determined by our internal staff of engineers based on projected 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 updated 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 estimated loss rates by loan class. The gross loss rate for each loan class is determined by the greater of the current gross loss rate based on the most recent twelve months or a ten-year gross loss rate. Recoveries are not directly considered in the estimation of 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, gross loss rates are adjusted for changes in risk grading. For each loan class, the current weighted average risk grade is compared to the long-term average risk grade. This comparison determines whether credit risk in each loan class is increasing or decreasing. 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 specific loan classes which have not yet been represented in the 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 loan or loan class. These factors include trends in the economy of our primary lending areas, concentrations in large balance loans and other relevant factors.
	An accrual for off-balance sheet credit losses is included in Other liabilities in the Consolidated Balance Sheets. The appropriateness of this 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.
	The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the three months ended September 30, 2013 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific Allowance				Total
	Allowance for loan losses:
	Beginning balance		$	64,044			$	49,687			$	39,206			$	7,738			$	42,449			$	203,124
	Provision for loan losses		(1,774		)		(6,279		)		(136		)		1,256				(1,567		)		(8,500		)
	Loans charged off		(1,354		)		(419		)		(961		)		(1,974		)		—				(4,708		)
	Recoveries		864				2,073				188				1,284				—				4,409
Ending balance		$	61,780			$	45,062			$	38,297			$	8,304			$	40,882			$	194,325
Allowance for off-balance sheet credit losses:
Beginning balance		$	402			$	1,178			$	6			$	18			$	—			$	1,604
Provision for off-balance sheet credit losses		(228		)		202				42				(16		)		—				—
Ending balance		$	174			$	1,380			$	48			$	2			$	—			$	1,604
Total provision for credit losses		$	(2,002	)		$	(6,077	)		$	(94	)		$	1,240			$	(1,567	)		$	(8,500	)
The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the nine months ended September 30, 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		(3,507		)		(10,077		)		187				513				(3,305		)		(16,189		)
Loans charged off		(6,190		)		(5,669		)		(4,797		)		(5,513		)		—				(22,169		)
Recoveries		6,197				5,924				1,204				3,851				—				17,176
Ending balance		$	61,780			$	45,062			$	38,297			$	8,304			$	40,882			$	194,325
Allowance for off-balance sheet credit losses:
Beginning balance		$	475			$	1,353			$	78			$	9			$	—			$	1,915
Provision for off-balance sheet credit losses		(301		)		27				(30		)		(7		)		—				(311		)
Ending balance		$	174			$	1,380			$	48			$	2			$	—			$	1,604
Total provision for credit losses		$	(3,808	)		$	(10,050	)		$	157			$	506			$	(3,305	)		$	(16,500	)
The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the three months ended September 30, 2012 is summarized as follows (in thousands):
		Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific Allowance				Total
Allowance for loan losses:
Beginning balance		$	83,477			$	55,806			$	42,688			$	8,840			$	40,858			$	231,669
Provision for loan losses		4				4,821				(370		)		3,293				56				7,804
Loans charged off		(812		)		(2,607		)		(1,600		)		(3,902		)		—				(8,921		)
Recoveries		(890		)	1	2,684				298				1,112				—				3,204
Ending balance		$	81,779			$	60,704			$	41,016			$	9,343			$	40,914			$	233,756
Allowance for off-balance sheet credit losses:
Beginning balance		$	8,224			$	1,425			$	80			$	18			$	—			$	9,747
Provision for off-balance sheet credit losses		(7,823		)		18				(4		)		5				—				(7,804		)
Ending balance		$	401			$	1,443			$	76			$	23			$	—			$	1,943
Total provision for credit losses		$	(7,819	)		$	4,839			$	(374	)		$	3,298			$	56			$	—
1	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa by the Oklahoma Supreme Court. Excluding this refund, BOK Financial had net charge-offs (recoveries) to average loans of (0.05%) on an annualized basis.
The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the nine months ended September 30, 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		995				(322		)		528				3,553				(5,436		)		(682		)
Loans charged off		(7,840		)		(10,548		)		(7,447		)		(8,303		)		—				(34,138		)
Recoveries		5,181			1	4,540				1,459				3,915				—				15,095
Ending balance		$	81,779			$	60,704			$	41,016			$	9,343			$	40,914			$	233,756
Allowance for off-balance sheet credit losses:
Beginning balance		$	7,906			$	1,250			$	91			$	14			$	—			$	9,261
Provision for off-balance sheet credit losses		(7,505		)		193				(15		)		9				—				(7,318		)
Ending balance		$	401			$	1,443			$	76			$	23			$	—			$	1,943
Total provision for credit losses		$	(6,510	)		$	(129	)		$	513			$	3,562			$	(5,436	)		$	(8,000	)
1	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa by the Oklahoma Supreme Court. Excluding this refund, BOK Financial had net charge-offs (recoveries) to average loans of (0.05%) on an annualized basis.
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at September 30, 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		$	7,551,553			$	61,208			$	19,522			$	572			$	7,571,075			$	61,780
Commercial real estate		2,296,727				44,574				52,502				488				2,349,229				45,062
Residential mortgage		1,996,086				38,083				38,679				214				2,034,765				38,297
Consumer		393,407				8,304				1,624				—				395,031				8,304
Total		12,237,773				152,169				112,327				1,274				12,350,100				153,443
Nonspecific allowance		—				—				—				—				—				40,882
Total		$	12,237,773			$	152,169			$	112,327			$	1,274			$	12,350,100			$	194,325
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		1,998,921				40,934				46,119				769				2,045,040				41,703
Consumer		392,796				9,328				2,709				125				395,505				9,453
Total		12,177,535				167,087				133,921				4,233				12,311,456				171,320
Nonspecific allowance		—				—				—				—				—				44,187
Total		$	12,177,535			$	167,087			$	133,921			$	4,233			$	12,311,456			$	215,507
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at September 30, 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		$	7,245,145			$	81,575			$	21,762			$	204			$	7,266,907			$	81,779
Commercial real estate		2,101,511				57,587				75,761				3,117				2,177,272				60,704
Residential mortgage		1,987,546				40,799				28,757				217				2,016,303				41,016
Consumer		366,776				9,214				5,109				129				371,885				9,343
Total		11,700,978				189,175				131,389				3,667				11,832,367				192,842
Nonspecific allowance		—				—				—				—				—				40,914
Total		$	11,700,978			$	189,175			$	131,389			$	3,667			$	11,832,367			$	233,756
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 September 30, 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		$	7,553,151			$	60,570			$	17,924			$	1,210			$	7,571,075			$	61,780
Commercial real estate		2,349,229				45,062				—				—				2,349,229				45,062
Residential mortgage		236,399				3,764				1,798,366				34,533				2,034,765				38,297
Consumer		268,690				2,797				126,341				5,507				395,031				8,304
Total		10,407,469				112,193				1,942,631				41,250				12,350,100				153,443
Nonspecific allowance		—				—				—				—				—				40,882
Total		$	10,407,469			$	112,193			$	1,942,631			$	41,250			$	12,350,100			$	194,325
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
The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at September 30, 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		$	7,249,429			$	80,676			$	17,478			$	1,103			$	7,266,907			$	81,779
Commercial real estate		2,177,235				60,704				37				—				2,177,272				60,704
Residential mortgage		275,490				6,416				1,740,813				34,600				2,016,303				41,016
Consumer		202,897				2,711				168,988				6,632				371,885				9,343
Total		9,905,051				150,507				1,927,316				42,335				11,832,367				192,842
Nonspecific allowance		—				—				—				—				—				40,914
Total		$	9,905,051			$	150,507			$	1,927,316			$	42,335			$	11,832,367			$	233,756
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 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 September 30, 2013 by the risk grade categories (in thousands):
		Internally Risk Graded												Non-Graded
		Performing				Potential Problem				Nonaccrual				Performing				Nonaccrual				Total
Commercial:
Energy		$	2,305,225			$	4,813			$	1,953			$	—			$	—			$	2,311,991
Services		2,130,169				11,455				6,927				—				—				2,148,551
Wholesale/retail		1,171,923				2,660				7,223				—				—				1,181,806
Manufacturing		378,723				2,894				843				—				—				382,460
Healthcare		1,158,436				43				1,733				—				—				1,160,212
Integrated food services		136,650				4,790				—				—				—				141,440
Other commercial and industrial		225,895				—				796				17,877				47				244,615
Total commercial		7,507,021				26,655				19,475				17,877				47				7,571,075
Commercial real estate:
Construction and land development		178,278				17,394				20,784				—				—				216,456
Retail		548,197				807				7,914				—				—				556,918
Office		413,083				2,122				6,838				—				—				422,043
Multifamily		504,548				11,556				4,350				—				—				520,454
Industrial		244,768				254				—				—				—				245,022
Other commercial real estate		365,051				10,669				12,616				—				—				388,336
Total commercial real estate		2,253,925				42,802				52,502				—				—				2,349,229
Residential mortgage:
Permanent mortgage		222,630				4,633				5,441				819,601				26,356				1,078,661
Permanent mortgages guaranteed by U.S. government agencies		—				—				—				163,342				577				163,919
Home equity		3,695				—				—				781,608				6,882				792,185
Total residential mortgage		226,325				4,633				5,441				1,764,551				33,815				2,034,765
Consumer:
Indirect automobile		—				—				—				9,800				957				10,757
Other consumer		267,564				846				280				115,197				387				384,274
Total consumer		267,564				846				280				124,997				1,344				395,031
Total		$	10,254,835			$	74,936			$	77,698			$	1,907,425			$	35,206			$	12,350,100
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				Nonaccrual				Performing				Nonaccrual				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:
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
The following table summarizes the Company’s loan portfolio at September 30, 2012 by the risk grade categories (in thousands):
		Internally Risk Graded												Non-Graded
		Performing				Potential Problem				Nonaccrual				Performing				Nonaccrual				Total
Commercial:
Energy		$	2,403,364			$	10,450			$	3,063			$	—			$	—			$	2,416,877
Services		1,923,017				34,452				10,099				—				—				1,967,568
Wholesale/retail		1,053,813				4,241				2,007				—				—				1,060,061
Manufacturing		330,608				10,469				2,283				—				—				343,360
Healthcare		1,019,362				184				3,305				—				—				1,022,851
Integrated food services		199,769				684				—				—				—				200,453
Other commercial and industrial		231,890				5,437				932				17,405				73				255,737
Total commercial		7,161,823				65,917				21,689				17,405				73				7,266,907
Commercial real estate:
Construction and land development		230,022				25,568				38,143				—				—				293,733
Retail		520,568				8,196				6,692				—				—				535,456
Office		391,859				12,554				9,833				—				—				414,246
Multifamily		383,317				6,667				3,145				—				—				393,129
Industrial		175,339				4,443				4,064				—				—				183,846
Other commercial real estate		329,659				13,319				13,847				—				37				356,862
Total commercial real estate		2,030,764				70,747				75,724				—				37				2,177,272
Residential mortgage:
Permanent mortgage		253,859				11,776				9,855				850,118				13,352				1,138,960
Permanent mortgages guaranteed by U.S. government agencies		—				—				—				161,761				510				162,271
Home equity		—				—				—				709,522				5,550				715,072
Total residential mortgage		253,859				11,776				9,855				1,721,401				19,412				2,016,303
Consumer:
Indirect automobile		—				—				—				45,349				1,932				47,281
Other consumer		198,419				1,663				2,815				121,345				362				324,604
Total consumer		198,419				1,663				2,815				166,694				2,294				371,885
Total		$	9,644,865			$	150,103			$	110,083			$	1,905,500			$	21,816			$	11,832,367
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 TDR and all loans repurchased from GNMA pools.
A summary of impaired loans follows (in thousands):
	As of																				For the							For the
	September 30, 2013																				Three Months Ended							Nine Months Ended
					Recorded Investment																September 30, 2013							September 30, 2013
	Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized			Average Recorded			Interest Income Recognized
	Principal								Allowance												Investment							Investment
	Balance
Commercial:
Energy	$	1,954			$	1,953			$	1,953			$	—			$	—			$	2,115			$	—		$	2,207		$	—
Services	9,105				6,927				5,789				1,138				515				7,188				—			9,509			—
Wholesale/retail	11,262				7,223				7,188				35				9				6,962				—			5,150			—
Manufacturing	1,051				843				843				—				—				860				—			1,425			—
Healthcare	2,340				1,733				1,685				48				48				2,202				—			2,450			—
Integrated food services	—				—				—				—				—				—				—			342			—
Other commercial and industrial	8,535				843				843				—				—				871				—			913			—
Total commercial	34,247				19,522				18,301				1,221				572				20,198				—			21,996			—
Commercial real estate:
Construction and land development	24,219				20,784				20,395				389				148				20,960				—			23,458			—
Retail	9,380				7,914				7,914				—				—				8,160				—			8,016			—
Office	8,254				6,838				6,830				8				8				7,333				—			6,834			—
Multifamily	4,351				4,350				4,350				—				—				5,399				—			3,528			—
Industrial	—				—				—				—				—				—				—			1,984			—
Other real estate loans	14,868				12,616				12,020				596				332				13,747				—			12,746			—
Total commercial real estate	61,072				52,502				51,509				993				488				55,599				—			56,566			—
Residential mortgage:
Permanent mortgage	39,648				31,797				31,527				270				214				32,272				539			35,829			1,142
Permanent mortgage guaranteed by U.S. government agencies1	171,935				163,919				163,919				—				—				162,497				1,722			162,337			5,130
Home equity	7,091				6,882				6,882				—				—				7,293				—			6,569			—
Total residential mortgage	218,674				202,598				202,328				270				214				202,062				2,261			204,735			6,272
Consumer:
Indirect automobile	960				957				957				—				—				1,073				—			1,268			—
Other consumer	677				667				667				—				—				758				—			899			—
Total consumer	1,637				1,624				1,624				—				—				1,831				—			2,167			—
Total	$	315,630			$	276,246			$	273,762			$	2,484			$	1,274			$	279,690			$	2,261		$	285,464		$	6,272
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 September 30, 2013, $577 thousand of these loans were nonaccruing and $163 million were 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, are recovered.
A summary of impaired loans at December 31, 2012 follows (in thousands):
						Recorded Investment
		Unpaid				Total				With No				With Allowance				Related Allowance
		Principal								Allowance
		Balance
Commercial:
Energy		$	2,460			$	2,460			$	2,460			$	—			$	—
Services		15,715				12,090				11,940				150				149
Wholesale/retail		9,186				3,077				3,016				61				15
Manufacturing		2,447				2,007				2,007				—				—
Healthcare		4,256				3,166				2,050				1,116				66
Integrated food services		684				684				684				—				—
Other commercial and industrial		8,482				983				983				—				—
Total commercial		43,230				24,467				23,140				1,327				230
Commercial real estate:
Construction and land development		44,721				26,131				25,575				556				155
Retail		9,797				8,117				8,117				—				—
Office		8,949				6,829				6,604				225				21
Multifamily		3,189				2,706				2,706				—				—
Industrial		3,968				3,968				—				3,968				2,290
Other real estate loans		15,377				12,875				10,049				2,826				643
Total commercial real estate		86,001				60,626				53,051				7,575				3,109
Residential mortgage:
Permanent mortgage		51,153				39,863				37,564				2,299				769
Permanent mortgage guaranteed by U.S. government agencies1		170,740				160,444				160,444				—				—
Home equity		6,256				6,256				6,256				—				—
Total residential mortgage		228,149				206,563				204,264				2,299				769
Consumer:
Indirect automobile		1,578				1,578				1,578				—				—
Other consumer		1,300				1,131				1,006				125				125
Total consumer		2,878				2,709				2,584				125				125
Total		$	360,258			$	294,365			$	283,039			$	11,326			$	4,233
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 were nonaccruing and $160 million were accruing based on the guarantee by U.S. government agencies.
A summary of impaired loans at September 30, 2012 follows (in thousands):
	As of																				For the							For the
	As of September 30, 2012																				Three Months Ended							Nine Months Ended
					Recorded Investment																September 30, 2012							September 30, 2012
	Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized			Average Recorded			Interest Income Recognized
	Principal								Allowance												Investment							Investment
	Balance
Commercial:
Energy	$	3,273			$	3,063			$	3,063			$	—			$	—			$	3,075			$	—		$	1,700		$	—
Services	13,135				10,099				9,978				121				120				10,111				—			13,534			—
Wholesale/retail	8,039				2,007				1,937				70				18				3,091				—			11,594			—
Manufacturing	6,548				2,283				2,283				—				—				7,257				—			12,667			—
Healthcare	4,395				3,305				2,159				1,146				66				3,308				—			4,396			—
Integrated food services	—				—				—				—				—				—				—			—			—
Other commercial and industrial	8,504				1,005				1,005				—				—				1,305				—			1,398			—
Total commercial	43,894				21,762				20,425				1,337				204				28,147				—			45,289			—
Commercial real estate:
Construction and land development	67,087				38,143				37,579				564				155				42,097				—			50,009			—
Retail	8,372				6,692				6,692				—				—				7,300				—			6,778			—
Office	13,736				9,833				9,608				225				21				10,211				—			10,645			—
Multifamily	3,259				3,145				3,145				—				—				3,182				—			3,329			—
Industrial	4,064				4,064				—				4,064				2,290				2,032				—			2,032			—
Other real estate loans	16,473				13,884				11,454				2,430				651				13,166				—			14,685			—
Total commercial real estate	112,991				75,761				68,478				7,283				3,117				77,988				—			87,478			—
Residential mortgage:
Permanent mortgage	31,068				23,207				22,906				301				217				20,672				398			24,287			1,193
Permanent mortgage guaranteed by U.S. government agencies1	169,622				162,271				162,271				—				—				163,863				1,680			178,542			5,039
Home equity	5,550				5,550				5,550				—				—				5,071				—			4,976			—
Total residential mortgage	206,240				191,028				190,727				301				217				189,606				2,078			207,805			6,232
Consumer:
Indirect automobile	1,932				1,932				1,932				—				—				2,095				—			2,063			—
Other consumer	5,219				3,177				3,048				129				129				3,967				—			2,249			—
Total consumer	7,151				5,109				4,980				129				129				6,062				—			4,312			—
Total	$	370,276			$	293,660			$	284,610			$	9,050			$	3,667			$	301,803			$	2,078		$	344,884		$	6,232
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 September 30, 2012, $510 thousand of these loans were nonaccruing and $162 million were 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 September 30, 2013 were as follows (in thousands):
		As of September 30, 2013																Amounts Charged Off During
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended September 30, 2013				Nine Months Ended
		Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2013
Nonaccruing TDRs:
Commercial:
Energy		$	—			$	—			$	—			$	—			$	—			$	—
Services		3,791				1,274				2,517				250				—				—
Wholesale/retail		275				141				134				9				—				—
Manufacturing		396				—				396				—				154				154
Healthcare		—				—				—				—				—				—
Integrated food services		—				—				—				—				—				—
Other commercial and industrial		772				30				742				—				—				—
Total commercial		5,234				1,445				3,789				259				154				154
Commercial real estate:
Construction and land development		10,673				1,776				8,897				148				—				54
Retail		6,030				2,032				3,998				—				—				627
Office		5,448				1,294				4,154				—				—				77
Multifamily		980				980				—				—				—				—
Industrial		—				—				—				—				—				—
Other real estate loans		8,482				6,874				1,608				—				—				—
Total commercial real estate		31,613				12,956				18,657				148				—				758
Residential mortgage:
Permanent mortgage		17,319				9,579				7,740				13				73				450
Home equity		3,782				3,219				563				—				61				127
Total residential mortgage		21,101				12,798				8,303				13				134				577
Consumer:
Indirect automobile		817				737				80				—				—				1
Other consumer		471				287				184				—				2				2
Total consumer		1,288				1,024				264				—				2				3
Total nonaccruing TDRs		$	59,236			$	28,223			$	31,013			$	420			$	290			$	1,492
		As of September 30, 2013																Amounts Charged Off During
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended September 30, 2013				Nine Months Ended
		Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2013
Accruing TDRs:
Residential mortgage:
Permanent mortgage		—				—				—				—				—				—
Permanent mortgages guaranteed by U.S. government agencies		50,099				11,975				38,124				—				—				—
Total residential mortgage		50,099				11,975				38,124				—				—				—
Total accruing TDRs		50,099				11,975				38,124				—				—				—
Total TDRs		$	109,335			$	40,198			$	69,137			$	420			$	290			$	1,492
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
		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
Manufacturing		—				—				—				—
Healthcare		64				64				—				—
Integrated food services		—				—				—				—
Other commercial and industrial		675				—				675				—
Total commercial		5,521				3,525				1,996				60
Commercial real estate:
Construction and land development		14,898				9,989				4,909				76
Retail		6,785				5,735				1,050				—
Office		3,899				1,920				1,979				—
Multifamily		—				—				—				—
Industrial		—				—				—				—
Other real estate loans		5,017				3,399				1,618				—
Total commercial real estate		30,599				21,043				9,556				76
Residential mortgage:
Permanent mortgage		20,490				12,214				8,276				54
Home equity		—				—				—				—
Total residential mortgage		20,490				12,214				8,276				54
Consumer:
Indirect automobile		532				492				40				—
Other consumer		2,328				2,097				231				83
Total consumer		2,860				2,589				271				83
Total nonaccuring TDRs		$	59,470			$	39,371			$	20,099			$	273
		As of
		December 31, 2012
		Recorded				Performing in Accordance With Modified Terms				Not				Specific
		Investment								Performing in Accordance With Modified Terms				Allowance
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
A summary of troubled debt restructurings by accruing status as of September 30, 2012 were as follows (in thousands):
		As of September 30, 2012																Amounts Charged Off During
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended Sept. 30, 2012				Nine Months Ended
		Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2012
Nonaccruing TDRs:
Commercial:
Energy		$	—			$	—			$	—			$	—			$	—			$	—
Services		2,594				2,109				485				—				—				—
Wholesale/retail		1,557				1,385				172				18				—				—
Manufacturing		—				—				—				—				—				—
Healthcare		72				72				—				—				—				—
Integrated food services		—				—				—				—				—				—
Other commercial and industrial		678				—				678				—				—				—
Total commercial		4,901				3,566				1,335				18				—				—
Commercial real estate:
Construction and land development		18,406				9,842				8,564				76				982				3,252
Retail		3,448				3,448				—				—				150				150
Office		3,376				1,368				2,008				—				—				269
Multifamily		—				—				—				—				—				—
Industrial		—				—				—				—				—				—
Other real estate loans		5,310				3,574				1,736				55				87				2,269
Total commercial real estate		30,540				18,232				12,308				131				1,219				5,940
Residential mortgage:
Permanent mortgage		6,925				4,245				2,680				54				—				24
Home equity		—				—				—				—				—				—
Total residential mortgage		6,925				4,245				2,680				54				—				24
Consumer:
Indirect automobile		—				—				—				—				—				—
Other consumer		2,213				443				1,770				88				1,345				1,345
Total consumer		2,213				443				1,770				88				1,345				1,345
Total nonaccruing TDRs		$	44,579			$	26,486			$	18,093			$	291			$	2,564			$	7,309
		As of September 30, 2012																Amounts Charged Off During
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended Sept. 30, 2012				Nine Months Ended
		Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2012
Nonaccruing TDRs:
Accruing TDRs:
Residential mortgage:
Permanent mortgage		3,402				2,225				1,177				—				—				83
Permanent mortgages guaranteed by U.S. government agencies		24,590				7,684				16,906				—				—				—
Total residential mortgage		27,992				9,909				18,083				—				—				83
Total accruing TDRs		27,992				9,909				18,083				—				—				83
Total TDRs		$	72,571			$	36,395			$	36,176			$	291			$	2,564			$	7,392
Troubled debt restructurings generally consist of interest rates concessions, payment stream concessions or a combination of concessions to distressed borrowers. The following tables detail the recorded balance of loans at September 30, 2013 by class that were restructured during the three and nine months ended September 30, 2013 by primary type of concession (in thousands):
	Three Months Ended
	Sept. 30, 2013
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				610				228				—				838			838
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				396				—				396			396
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				—				—				—				—			—
Total commercial	—				—				—				610				624				—				1,234			1,234
Commercial real estate:
Construction and land development	—				—				—				—				—				—				—			—
Retail	—				—				—				—				498				—				498			498
Office	—				—				—				—				—				—				—			—
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				—				—				—			—
Total commercial real estate	—				—				—				—				498				—				498			498
Residential mortgage:
Permanent mortgage	—				—				—				—				—				222				222			222
Permanent mortgage guaranteed by U.S. government agencies	1,971				2,892				4,863				—				—				—				—			4,863
Home equity	—				—				—				—				—				515				515			515
Total residential mortgage	1,971				2,892				4,863				—				—				737				737			5,600
Consumer:
Indirect automobile	—				—				—				—				—				58				58			58
Other consumer	—				—				—				—				—				58				58			58
Total consumer	—				—				—				—				—				116				116			116
Total	$	1,971			$	2,892			$	4,863			$	610			$	1,122			$	853			$	2,585		$	7,448
	Nine Months Ended
	30-Sep-13
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				610				1,351				—				1,961			1,961
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				396				—				396			396
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				145				—				—				145			145
Total commercial	—				—				—				755				1,747				—				2,502			2,502
Commercial real estate:
Construction and land development	—				—				—				—				—				—				—			—
Retail	—				—				—				—				1,110				—				1,110			1,110
Office	—				—				—				—				3,173				—				3,173			3,173
Multifamily	—				—				—				—				980				—				980			980
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				3,870				—				3,870			3,870
Total commercial real estate	—				—				—				—				9,133				—				9,133			9,133
Residential mortgage:
Permanent mortgage	—				—				—				—				132				864				996			996
Permanent mortgage guaranteed by U.S. government agencies	9,817				9,589				19,406				—				—				—				—			19,406
Home equity	—				—				—				—				—				2,490				2,490			2,490
Total residential mortgage	9,817				9,589				19,406				—				132				3,354				3,486			22,892
Consumer:
Indirect automobile	—				—				—				—				—				633				633			633
Other consumer	—				—				—				81				—				130				211			211
Total consumer	—				—				—				81				—				763				844			844
Total	$	9,817			$	9,589			$	19,406			$	836			$	11,012			$	4,117			$	15,965		$	35,371
Troubled debt restructurings generally consist of interest rates concessions, payment stream concessions or a combination of concessions to distressed borrowers. The following tables detail the recorded balance of loans by class that were restructured during the three and nine months ended September 30, 2012 by primary type of concession (in thousands):
	Three Months Ended
	Sept. 30, 2012
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				875				—				—				875			875
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				—				—				—			—
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				—				—				—				—			—
Total commercial	—				—				—				875				—				—				875			875
Commercial real estate:
Construction and land development	—				—				—				—				6,598				—				6,598			6,598
Retail	—				—				—				—				—				—				—			—
Office	—				—				—				—				—				—				—			—
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				—				—				—			—
Total commercial real estate	—				—				—				—				6,598				—				6,598			6,598
Residential mortgage:
Permanent mortgage	—				—				—				—				—				—				—			—
Permanent mortgage guaranteed by U.S. government agencies	—				961				961				—				—				—				—			961
Home equity	—				—				—				—				—				—				—			—
Total residential mortgage	—				961				961				—				—				—				—			961
Consumer:
Indirect automobile	—				—				—				—				—				—				—			—
Other consumer	—				—				—				87				—				—				87			87
Total consumer	—				—				—				87				—				—				87			87
Total	$	—			$	961			$	961			$	962			$	6,598			$	—			$	7,560		$	8,521
	Nine Months Ended
	30-Sep-12
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				875				70				—				945			945
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				—				—				—			—
Healthcare	—				—				—				—				—				72				72			72
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				—				—				—				—			—
Total commercial	—				—				—				875				70				72				1,017			1,017
Commercial real estate:
Construction and land development	—				—				—				1,280				6,598				—				7,878			7,878
Retail	—				—				—				2,398				—				—				2,398			2,398
Office	—				—				—				1,368				—				—				1,368			1,368
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				1,605				—				1,605			1,605
Total commercial real estate	—				—				—				5,046				8,203				—				13,249			13,249
Residential mortgage:
Permanent mortgage	—				151				151				—				—				781				781			932
Permanent mortgage guaranteed by U.S. government agencies	—				4,465				4,465				—				—				—				—			4,465
Home equity	—				—				—				—				—				—				—			—
Total residential mortgage	—				4,616				4,616				—				—				781				781			5,397
Consumer:
Indirect automobile	—				—				—				—				—				—				—			—
Other consumer	—				—				—				452				—				1,630				2,082			2,082
Total consumer	—				—				—				452				—				1,630				2,082			2,082
Total	$	—			$	4,616			$	4,616			$	6,373			$	8,273			$	2,483			$	17,129		$	21,745
The following table summarizes, by loan class, the recorded investment at September 30, 2013 of loans modified as TDRs within the previous 12 months and for which there was a payment default during the three and nine months ended September 30, 2013 (in thousands):
	Three Months Ended												Nine Months Ended
	Sept. 30, 2013												Sept. 30, 2013
	Accruing				Nonaccrual				Total				Accruing				Nonaccrual				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				1,338				1,338				—				1,948				1,948
Wholesale/retail	—				—				—				—				—				—
Manufacturing	—				396				396				—				396				396
Healthcare	—				—				—				—				—				—
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				145				145				—				168				168
Total commercial	—				1,879				1,879				—				2,512				2,512
Commercial real estate:
Construction and land development	—				257				257				—				257				257
Retail	—				1,110				1,110				—				1,110				1,110
Office	—				3,173				3,173				—				3,173				3,173
Multifamily	—				—				—				—				980				980
Industrial	—				—				—				—				—				—
Other real estate loans	—				—				—				—				3,870				3,870
Total commercial real estate	—				4,540				4,540				—				9,390				9,390
Residential mortgage:
Permanent mortgage	—				820				820				—				941				941
Permanent mortgage guaranteed by U.S. government agencies	22,359				—				22,359				26,636				—				26,636
Home equity	—				563				563				—				630				630
Total residential mortgage	22,359				1,383				23,742				26,636				1,571				28,207
Consumer:
Indirect automobile	—				81				81				—				116				116
Other consumer	—				53				53				—				53				53
Total consumer	—				134				134				—				169				169
Total	$	22,359			$	7,936			$	30,295			$	26,636			$	13,642			$	40,278
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.
The following table summarizes, by loan class, the recorded investment at September 30, 2012 of loans modified as TDRs within the previous 12 months and for which there was a payment default during the three and nine months ended September 30, 2012 (in thousands):
	Three Months Ended												Nine Months Ended
	Sept. 30, 2012												Sept. 30, 2012
	Accruing				Nonaccrual				Total				Accruing				Nonaccrual				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				70				70				—				70				70
Wholesale/retail	—				—				—				—				—				—
Manufacturing	—				—				—				—				—				—
Healthcare	—				—				—				—				—				—
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				—				—				—				—				—
Total commercial	—				70				70				—				70				70
Commercial real estate:
Construction and land development	—				1,183				1,183				—				1,183				1,183
Retail	—				—				—				—				2,398				2,398
Office	—				—				—				—				1,368				1,368
Multifamily	—				—				—				—				—				—
Industrial	—				—				—				—				—				—
Other real estate loans	—				—				—				—				—				—
Total commercial real estate	—				1,183				1,183				—				4,949				4,949
Residential mortgage:
Permanent mortgage	151				—				151				151				—				151
Permanent mortgage guaranteed by U.S. government agencies	3,946				—				3,946				4,635				—				4,635
Home equity	—				—				—				—				—				—
Total residential mortgage	4,097				—				4,097				4,786				—				4,786
Consumer:
Indirect automobile	—				—				—				—				—				—
Other consumer	—				1,770				1,770				—				1,770				1,770
Total consumer	—				1,770				1,770				—				1,770				1,770
Total	$	4,097			$	3,023			$	7,120			$	4,786			$	6,789			$	11,575
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 September 30, 2013 is as follows (in thousands):
						Past Due
		Current				30 to 89				90 Days				Nonaccrual				Total
						Days				or More
Commercial:
Energy		$	2,308,639			$	1,399			$	—			$	1,953			$	2,311,991
Services		2,140,835				704				85				6,927				2,148,551
Wholesale/retail		1,173,628				955				—				7,223				1,181,806
Manufacturing		381,048				569				—				843				382,460
Healthcare		1,158,340				139				—				1,733				1,160,212
Integrated food services		141,440				—				—				—				141,440
Other commercial and industrial		243,656				116				—				843				244,615
Total commercial		7,547,586				3,882				85				19,522				7,571,075
Commercial real estate:
Construction and land development		195,672				—				—				20,784				216,456
Retail		548,810				194				—				7,914				556,918
Office		415,205				—				—				6,838				422,043
Multifamily		516,104				—				—				4,350				520,454
Industrial		244,415				607				—				—				245,022
Other real estate loans		375,250				470				—				12,616				388,336
Total commercial real estate		2,295,456				1,271				—				52,502				2,349,229
Residential mortgage:
Permanent mortgage		1,040,616				6,248				—				31,797				1,078,661
Permanent mortgages guaranteed by U.S. government agencies		20,985				18,639				123,718				577				163,919
Home equity		782,954				2,321				28				6,882				792,185
Total residential mortgage		1,844,555				27,208				123,746				39,256				2,034,765
Consumer:
Indirect automobile		9,416				384				—				957				10,757
Other consumer		382,188				1,344				75				667				384,274
Total consumer		391,604				1,728				75				1,624				395,031
Total		$	12,079,201			$	34,089			$	123,906			$	112,904			$	12,350,100
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:
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
A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of September 30, 2012 is as follows (in thousands):
						Past Due
		Current				30 to 89				90 Days				Nonaccrual				Total
						Days				or More
Commercial:
Energy		$	2,408,812			$	5,002			$	—			$	3,063			$	2,416,877
Services		1,956,190				741				538				10,099				1,967,568
Wholesale/retail		1,056,730				1,324				—				2,007				1,060,061
Manufacturing		340,243				834				—				2,283				343,360
Healthcare		1,014,771				4,775				—				3,305				1,022,851
Integrated food services		200,453				—				—				—				200,453
Other commercial and industrial		254,167				240				325				1,005				255,737
Total commercial		7,231,366				12,916				863				21,762				7,266,907
Commercial real estate:
Construction and land development		245,258				10,297				35				38,143				293,733
Retail		528,396				368				—				6,692				535,456
Office		403,223				1,190				—				9,833				414,246
Multifamily		389,949				35				—				3,145				393,129
Industrial		177,951				1,831				—				4,064				183,846
Other real estate loans		340,586				2,391				1				13,884				356,862
Total commercial real estate		2,085,363				16,112				36				75,761				2,177,272
Residential mortgage:
Permanent mortgage		1,097,550				17,953				250				23,207				1,138,960
Permanent mortgages guaranteed by U.S. government agencies		19,786				16,629				125,346				510				162,271
Home equity		706,561				2,961				—				5,550				715,072
Total residential mortgage		1,823,897				37,543				125,596				29,267				2,016,303
Consumer:
Indirect automobile		43,588				1,729				32				1,932				47,281
Other consumer		319,549				1,878				—				3,177				324,604
Total consumer		363,137				3,607				32				5,109				371,885
Total		$	11,503,763			$	70,178			$	126,527			$	131,899			$	11,832,367

Mortgage_Banking_Activities

Mortgage Banking Activities	9 Months Ended
	Sep. 30, 2013
Mortgage Banking [Abstract]	'
Mortgage Banking Activities [Text Block]	'
	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 loan 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):
			September 30, 2013							December 31, 2012						September 30, 2012
			Unpaid Principal Balance/				Fair Value			Unpaid Principal Balance/			Fair Value			Unpaid			Fair Value
			Notional							Notional						Principal
																Balance/
																Notional
	Residential mortgage loans held for sale		$	220,800			$	228,926		$	269,718		$	281,935		$	294,794		$	313,927
	Residential mortgage loan commitments		351,196				10,948			356,634			12,733			452,129			22,319
	Forward sales contracts		560,069				(9,363		)	598,442			(906		)	722,043			(11,144		)
							$	230,511					$	293,762					$	325,102
	No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of September 30, 2013, December 31, 2012 or September 30, 2012. No credit losses were recognized on residential mortgage loans held for sale for the nine month periods ended September 30, 2013 and 2012.
	Mortgage banking revenue was as follows (in thousands):
			Three Months Ended							Nine Months Ended
			September 30,				September 30,			September 30,			September 30,
			2013				2012			2013			2012
	Originating and marketing revenue:
	Residential mortgages loan held for sale		$	31,047			$	40,463		$	79,045		$	85,262
	Residential mortgage loan commitments		12,668				6,512			(1,774		)	15,722
	Forward sales contracts		(31,167		)		(6,618		)	(8,457		)	(7,856		)
	Total originating and marketing revenue		12,548				40,357			68,814			93,128
	Servicing revenue		10,938				9,909			31,244			29,764
	Total mortgage banking revenue		$	23,486			$	50,266		$	100,058		$	122,892
	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):
			September 30,				December 31,			September 30,
			2013				2012			2012
	Number of residential mortgage loans serviced for others		104,115				98,246			97,465
	Outstanding principal balance of residential mortgage loans serviced for others		$	13,298,479			$	11,981,624		$	11,756,350
	Weighted average interest rate		4.42		%		4.71		%	4.85		%
	Remaining term (in months)		292				289			289
	Activity in capitalized mortgage servicing rights during the three months ended September 30, 2013 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, June 30, 2013		$	15,582			$	117,307		$	132,889
	Additions, net		—				13,225			13,225
	Change in fair value due to loan runoff		(693		)		(4,212		)	(4,905		)
	Change in fair value due to market changes		(76		)		(270		)	(346		)
	Balance, Sept. 30, 2013		$	14,813			$	126,050		$	140,863
	Activity in capitalized mortgage servicing rights during the nine months ended September 30, 2013 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, December 31, 2012		$	12,976			$	87,836		$	100,812
	Additions, net		—				39,157			39,157
	Change in fair value due to loan runoff		(2,504		)		(13,229		)	(15,733		)
	Change in fair value due to market changes		4,341				12,286			16,627
	Balance, Sept. 30, 2013		$	14,813			$	126,050		$	140,863
	Activity in capitalized mortgage servicing rights during the three months ended September 30, 2012 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, June 30, 2012		$	16,361			$	75,422		$	91,783
	Additions, net		—				12,107			12,107
	Change in fair value due to loan runoff		(998		)		(3,663		)	(4,661		)
	Change in fair value due to market changes		(2,648		)		(6,928		)	(9,576		)
	Balance, Sept. 30, 2012		$	12,715			$	76,938		$	89,653
	Activity in capitalized mortgage servicing rights during the nine months ended September 30, 2012 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, December 31, 2011		$	18,903			$	67,880		$	86,783
	Additions, net		—				29,754			29,754
	Change in fair value due to loan runoff		(2,958		)		(10,027		)	(12,985		)
	Change in fair value due to market changes		(3,230		)		(10,669		)	(13,899		)
Balance, Sept. 30, 2012		$	12,715			$	76,938		$	89,653
Changes in the fair value of mortgage servicing rights are included in Other operating expense 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 based on significant unobservable inputs were as follows:
		September 30,		December 31,		September 30,
		2013		2012		2012
Discount rate – risk-free rate plus a market premium		10.23%		10.29%		10.32%
Prepayment rate – based upon loan interest rate, original term and loan type		7.03% - 30.92%		8.38% - 43.94%		9.14% - 46.42
Loan servicing costs – annually per loan based upon loan type:
Performing loans		$58 - $105		$55 - $105		$55 - $105
Delinquent loans		$135 - $500		$135 - $500		$135 - $500
Loans in foreclosure		$875 - $4,250		$875 - $4,250		$875 - $3,750
Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life		1.54%		0.87%		0.77%
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 September 30, 2013 follows (in thousands):
		< 4.00%				4.00% - 4.99%			5.00% - 5.99%			> 5.99%			Total
Fair value		$	60,587			$	47,954		$	25,965		$	6,357		$	140,863
Outstanding principal of loans serviced for others		$	5,367,632			$	4,214,910		$	2,436,350		$	1,279,587		$	13,298,479
Weighted average prepayment rate1		7.03		%		8.26		%	12.05		%	30.92		%	10.64		%
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 September 30, 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 $1.7 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 $2.1 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 September 30, 2013 follows (in thousands):
						Past Due
		Current				30 to 59			60 to 89			90 Days or More			Total
						Days			Days
FHLMC		$	4,603,938			$	38,363		$	9,870		$	35,126		$	4,687,297
FNMA		3,787,198				22,249			5,441			20,040			3,834,928
GNMA		4,381,908				127,465			36,463			14,793			4,560,629
Other		208,047				1,588			18			5,972			215,625
Total		$	12,981,091			$	189,665		$	51,792		$	75,931		$	13,298,479
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 $198 million at September 30, 2013, $227 million at December 31, 2012 and $238 million at September 30, 2012. A separate accrual for these off-balance sheet commitments is included in Other liabilities in the Consolidated Balance Sheets totaling $9.3 million at September 30, 2013, $11 million at December 31, 2012 and $18 million at September 30, 2012. At September 30, 2013, approximately 6% of the loans sold with recourse with an outstanding principal balance of $11 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. 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 allowance for losses on loans sold with recourse included in Other liabilities in the Consolidated Balance Sheets is summarized as follows (in thousands):
		Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013				2012			2013			2012
Beginning balance		$	9,665			$	17,832		$	11,359		$	18,683
Provision for recourse losses		601				1,055			270			3,495
Loans charged off, net		(981		)		(1,255		)	(2,344		)	(4,546		)
Ending balance		$	9,285			$	17,632		$	9,285		$	17,632
The Company also has an 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. The level of repurchases and indemnifications related to standard representations and warranties has remained low. The Company repurchased 5 loans from the agencies for $232 thousand during the third quarter of 2013 and had no related losses. There were two indemnification on loans paid during third quarter of 2013.
A summary of unresolved deficiency requests from the agencies and related accrual for credit losses follows (in thousands, except for number of unresolved deficiency requests):
	September 30,				December 31,
	2013				2012
Number of unresolved deficiency requests	524				389
Aggregate outstanding principal balance subject to unresolved deficiency requests	$	64,428			$	44,831
Unpaid principal balance subject to indemnification by the Company	2,440				1,233
Accrual for credit losses related to potential loan repurchases under representations and warranties	7,903				5,291

Employee_Benefits

Employee Benefits	9 Months Ended
	Sep. 30, 2013
Compensation And Retirment Disclosure [Abstract]	'
Employee Benefits [Text Block]	'
	(6) Employee Benefits
	BOK Financial has sponsored a defined benefit Pension Plan for all employees who satisfied certain age and service requirements.  Pension Plan benefits were curtailed as of April 1, 2006. The Company recognized periodic pension expense of $500 thousand and $965 thousand for the three months ended September 30, 2013 and 2012, respectively and $1.5 million and $2.9 million for the nine months ended September 30, 2013 and 2012, respectively. The Company made no Pension Plan contributions during the three and nine months ended September 30, 2013 and 2012.
	Management has been advised that the maximum allowable contribution for 2013 is $23 million. No minimum contribution is required for 2013.

Commitments_and_Contingent_Lia

Commitments and Contingent Liabilities	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingent Liabilities	'
	Litigation Contingencies
	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 $6.4 million at September 30, 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 limits both the amount and structure of these types of investments. As a result, the Company's private equity activity might be curtailed.
	Consolidated tax credit investment entities represent the Company's interest in entities earning federal new market tax credits related to qualifying loans. 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 Company also has interests in various unrelated alternative investments generally consisting of unconsolidated limited partnership interests in or loans to entities for which investment return is primarily 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.
	A summary of consolidated and unconsolidated alternative investments as of September 30, 2013, December 31, 2012 and September 30, 2012 is as follows (in thousands):
		September 30, 2013
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	27,799	$	—	$	—	$	23,710
	Tax credit entities	10,000		13,577		—		10,964		10,000
	Other	—		9,510		—		—		2,020
	Total consolidated	$	10,000	$	50,886	$	—	$	10,964	$	35,730
	Unconsolidated:
	Tax credit entities	$	30,345	$	92,039	$	44,285	$	—	$	—
	Other	—		9,596		1,698		—		—
	Total unconsolidated	$	30,345	$	101,635	$	45,983	$	—	$	—
		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	$	—	$	—
		September 30, 2012
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	28,792	$	—	$	—	$	24,777
	Tax credit entities	10,000		14,094		—		10,964		10,000
	Other	—		9,024		—		—		2,041
	Total consolidated	$	10,000	$	51,910	$	—	$	10,964	$	36,818
	Unconsolidated:
	Tax credit entities	$	17,486	$	69,717	$	36,433	$	—	$	—
	Other	—		9,902		2,062		—		—
	Total unconsolidated	$	17,486	$	79,619	$	38,495	$	—	$	—
	Other Commitments and Contingencies
	At September 30, 2013, Cavanal Hill Funds’ assets included $843 million of U.S. Treasury, $1.2 billion of cash management and $273 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 September 30, 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 the third quarter of 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.
	The Company agreed to guarantee rents totaling $28.7 million through September of 2017 to the City of Tulsa 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 $12.0 million at September 30, 2013. Current leases expire or are subject to lessee termination options 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 of Tulsa 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 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.

Shareholders_Equity

Shareholders' Equity	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Note [Abstract]	'
Shareholders' Equity [Text Block]	'
	(8) Shareholders' Equity
	On October 29, 2013, the Company declared a a quarterly cash dividend of $0.40 per common share on or about November 29, 2013 to shareholders of record as of November 16, 2013.
	Dividends declared during the three and nine months ended September 30, 2013 were $0.38 and $1.14 per share, respectively. Dividends declared during the three and nine months ended September 30, 2012 were $0.38 and $1.09 per share, respectively.
	Accumulated Other Comprehensive Income (Loss)
	AOCI includes unrealized gains and losses on available for sale ("AFS") securities and 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 are being amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of premium 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 are being 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, 2011		$	135,740		$	6,673		$	(12,742	)	$	(692	)	$	128,979
	Net change in unrealized gain (loss)		86,390			—			(292		)	—			86,098
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(5,430		)	—			—			(5,430		)
	Interest expense, Subordinated debentures		—			—			—			399			399
	Net impairment losses recognized in earnings		5,684			—			—			—			5,684
	Gain on available for sale securities, net		(32,779		)	—			—			—			(32,779		)
	Other comprehensive income (loss), before income taxes		59,295			(5,430		)	(292		)	399			53,972
	Income tax benefit (expense)1		(23,066		)	2,550			113			(155		)	(20,558		)
	Other comprehensive income (loss), net of income taxes		36,229			(2,880		)	(179		)	244			33,414
	Balance, Sept. 30, 2012		$	171,969		$	3,793		$	(12,921	)	$	(448	)	$	162,393
	Balance, December 31, 2012		$	155,553		$	3,078		$	(8,296	)	$	(415	)	$	149,920
	Net change in unrealized gains (losses)		(240,384		)	—			—			—			(240,384		)
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(2,717		)	—			—			(2,717		)
	Interest expense, Subordinated debentures		—			—			—			209			209
	Net impairment losses recognized in earnings		2,308			—			—			—			2,308
	Gain on available for sale securities, net		(9,086		)	—			—			—			(9,086		)
	Other comprehensive income (loss), before income taxes		(247,162		)	(2,717		)	—			209			(249,670		)
	Income tax benefit (expense)1		96,146			1,059			—			(81		)	97,124
	Other comprehensive income (loss), net of income taxes		(151,016		)	(1,658		)	—			128			(152,546		)
	Balance, Sept. 30, 2013		$	4,537		$	1,420		$	(8,296	)	$	(287	)	$	(2,626	)
	1	Calculated using a 39% effective tax rate.

Earnings_Per_Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	(9)  Earnings Per Share
	(In thousands, except share and per share amounts)	Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Numerator:
	Net income attributable to BOK Financial Corp. shareholders	$	75,738	$	87,382	$	243,633	$	268,626
	Less: Earnings allocated to participating securities	799		278		2,623		1,994
	Numerator for basic earnings per share – income available to common shareholders	74,939		87,104		241,010		266,632
	Effect of reallocating undistributed earnings of participating securities	2		1		6		6
	Numerator for diluted earnings per share – income available to common shareholders	$	74,941	$	87,105	$	241,016	$	266,638
	Denominator:
	Weighted average shares outstanding	68,770,950		68,183,171		68,687,609		68,204,078
	Less:  Participating securities included in weighted average shares outstanding	721,771		216,471		734,356		499,735
	Denominator for basic earnings per common share	68,049,179		67,966,700		67,953,253		67,704,343
	Dilutive effect of employee stock compensation plans1	223,682		368,289		222,662		277,215
	Denominator for diluted earnings per common share	68,272,861		68,334,989		68,175,915		67,981,558
	Basic earnings per share	$	1.1	$	1.28	$	3.55	$	3.94
	Diluted earnings per share	$	1.1	$	1.27	$	3.54	$	3.92
	1  Excludes employee stock options with exercise prices greater than current market price.	—		87,749		—		270,288

Reportable_Segments

Reportable Segments	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Reportable Segments [Text Block]	'
	(10)  Reportable Segments
	Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	91,540		$	25,131		$	6,300		$	43,380		$	166,351
	Net interest revenue (expense) from internal sources	(9,405		)	5,060			$	4,837		(492		)	—
	Net interest revenue	82,135			30,191			11,137			42,888			166,351
	Provision for credit losses	(1,326		)	1,331			255			(8,760		)	(8,500		)
	Net interest revenue after provision for credit losses	83,461			28,860			10,882			51,648			174,851
	Other operating revenue	42,509			46,932			55,601			274			145,316
	Other operating expense	60,969			56,431			59,993			33,251			210,644
	Net income before taxes	65,001			19,361			6,490			18,671			109,523
	Federal and state income taxes	25,285			7,531			2,525			(1,880		)	33,461
	Net income	39,716			11,830			3,965			20,551			76,062
	Net loss attributable to non-controlling interest	—			—			—			324			324
	Net income attributable to BOK Financial Corp. shareholders	$	39,716		$	11,830		$	3,965		$	20,227		$	75,738
	Average assets	$	10,460,986		$	5,655,914		$	4,385,941		$	6,751,891		$	27,254,732
	Average invested capital	911,229			293,716			206,872			1,553,106			2,964,923
	Performance measurements:
	Return on average assets	1.51		%	0.83		%	0.36		%				1.1		%
	Return on average invested capital	17.29		%	15.98		%	7.62		%				10.13		%
	Efficiency ratio	48.92		%	71.53		%	89.99		%				66.03		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	272,889		$	74,056		$	19,373		$	137,594		$	503,912
	Net interest revenue (expense) from internal sources	(27,907		)	15,711			$	15,209		(3,013		)	—
	Net interest revenue	244,982			89,767			34,582			134,581			503,912
	Provision for credit losses	(219		)	3,663			1,704			(21,648		)	(16,500		)
	Net interest revenue after provision for credit losses	245,201			86,104			32,878			156,229			520,412
	Other operating revenue	127,352			152,066			163,368			12,365			455,151
	Other operating expense	179,795			152,122			178,694			97,963			608,574
	Net income before taxes	192,758			86,048			17,552			70,631			366,989
	Federal and state income taxes	74,983			33,473			6,828			6,696			121,980
	Net income	117,775			52,575			10,724			63,935			245,009
	Net income attributable to non-controlling interest	—			—			—			1,376			1,376
	Net income attributable to BOK Financial Corp. shareholders	$	117,775		$	52,575		$	10,724		$	62,559		$	243,633
	Average assets	$	10,470,800		$	5,691,406		$	4,537,922		$	6,774,754		$	27,474,882
	Average invested capital	900,789			295,394			204,592			1,595,910			2,996,685
	Performance measurements:
	Return on average assets	1.5		%	1.24		%	0.32		%				1.19		%
	Return on average invested capital	17.48		%	23.8		%	7		%				10.87		%
	Efficiency ratio	48.3		%	64.28		%	90.57		%				63.35		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2012 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	91,381		$	24,862		$	7,064		$	52,720		$	176,027
	Net interest revenue (expense) from internal sources	(11,002		)	5,410			5,452			140			—
	Net interest revenue	80,379			30,272			12,516			52,860			176,027
	Provision for credit losses	3,253			338			509			(4,100		)	—
	Net interest revenue after provision for credit losses	77,126			29,934			12,007			56,960			176,027
	Other operating revenue	40,091			80,640			50,156			9,057			179,944
	Other operating expense	62,633			74,486			53,917			31,304			222,340
	Net income before taxes	54,584			36,088			8,246			34,713			133,631
	Federal and state income taxes	21,233			14,038			3,208			7,299			45,778
	Net income	33,351			22,050			5,038			27,414			87,853
	Net loss attributable to non-controlling interest	—			—			—			471			471
	Net income attributable to BOK Financial Corp. shareholders	$	33,351		$	22,050		$	5,038		$	26,943		$	87,382
	Average assets	$	10,065,208		$	5,671,356		$	4,273,386		$	6,578,222		$	26,588,172
	Average invested capital	865,157			292,280			188,755			1,601,000			2,947,192
Performance measurements:
Return on average assets	1.32		%	1.55		%	0.47		%				1.31		%
Return on average invested capital	15.34		%	30.01		%	10.59		%				11.8		%
Efficiency ratio	51.99		%	61.11		%	86.27		%				61.18		%
Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2012 is as follows (in thousands):
	Commercial			Consumer			Wealth			Funds Management and Other			BOK
							Management						Financial
													Consolidated
Net interest revenue from external sources	$	274,423		$	77,173		$	21,340		$	158,021		$	530,957
Net interest revenue (expense) from internal sources	(34,491		)	15,093			15,503			3,895			—
Net interest revenue	239,932			92,266			36,843			161,916			530,957
Provision for credit losses	10,393			5,991			1,680			(26,064		)	(8,000		)
Net interest revenue after provision for credit losses	229,539			86,275			35,163			187,980			538,957
Other operating revenue	131,042			205,400			148,105			18,938			503,485
Other operating expense	181,119			197,399			158,505			90,464			627,487
Net income before taxes	179,462			94,276			24,763			116,454			414,955
Federal and state income taxes	69,811			36,673			9,633			28,330			144,447
Net income	109,651			57,603			15,130			88,124			270,508
Net income attributable to non-controlling interest	—			—			—			1,882			1,882
Net income attributable to BOK Financial Corp. shareholders	$	109,651		$	57,603		$	15,130		$	86,242		$	268,626
Average assets	$	9,981,793		$	5,705,411		$	4,202,977		$	5,993,489		$	25,883,670
Average invested capital	880,777			287,888			179,772			1,535,515			2,883,952
Performance measurements:
Return on average assets	1.47		%	1.35		%	0.48		%				1.39		%
Return on average invested capital	16.63		%	26.73		%	11.25		%				12.44		%
Efficiency ratio	50.8		%	63.62		%	85.91		%				60.68		%

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	(11) 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. There were no transfers in or out of quoted prices in active markets for identical instruments, significant other observable inputs or significant unobservable inputs during the nine months ended September 30, 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 prices provided by third-party pricing services at September 30, 2013, December 31, 2012 or September 30, 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 September 30, 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		$	74,632			$	—			$	74,632			$	—
	U.S. agency residential mortgage-backed securities		26,129				—				26,129				—
	Municipal and other tax-exempt securities		37,057				—				37,057				—
	Other trading securities		13,069				—				13,069				—
	Total trading securities		150,887				—				150,887				—
	Available for sale securities:
	U.S. Treasury		1,052				1,052				—				—
	Municipal and other tax-exempt		95,440				—				55,769				39,671
	U.S. agency residential mortgage-backed securities		7,981,387				—				7,981,387				—
	Privately issued residential mortgage-backed securities		230,900				—				230,900				—
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,946,295				—				1,946,295				—
	Other debt securities		35,362				—				30,650				4,712
	Perpetual preferred stock		23,680				—				23,680				—
	Equity securities and mutual funds		58,787				—				54,580				4,207
	Total available for sale securities		10,372,903				1,052				10,323,261				48,590
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		163,567				—				163,567				—
	Other securities		4,293				—				4,293				—
	Total fair value option securities		167,860				—				167,860				—
	Residential mortgage loans held for sale		230,511				—				230,511				—
	Mortgage servicing rights1		140,863				—				—				140,863
	Derivative contracts, net of cash margin2		377,325				644				376,681				—
	Other assets – private equity funds		27,799				—				—				27,799
	Liabilities:
	Derivative contracts, net of cash margin2		232,544				—				232,544				—
	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 5, 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 contacts, 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 rights1		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 5, 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 contacts, net of cash margin.
The fair value of financial assets and liabilities that are measured on a recurring basis are as follows as of September 30, 2012 (in thousands):
		Total				Quoted Prices in				Significant Other Observable Inputs				Significant Unobservable Inputs
						Active Markets for Identical Instruments
Assets:
Trading securities:
U.S. Government agency debentures		$	3,100			$	—			$	3,100			$	—
U.S. agency residential mortgage-backed securities		119,835				—				119,835				—
Municipal and other tax-exempt securities		58,150				—				58,150				—
Other trading securities		23,157				—				23,157				—
Total trading securities		204,242				—				204,242				—
Available for sale securities:
U.S. Treasury		1,002				1,002				—				—
Municipal and other tax-exempt		87,969				—				46,690				41,279
U.S. agency residential mortgage-backed securities		10,654,821				—				10,654,821				—
Privately issued residential mortgage-backed securities		331,722				—				331,722				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		339,095				—				339,095				—
Other debt securities		36,456				—				31,056				5,400
Perpetual preferred stock		25,288				—				25,288				—
Equity securities and mutual funds		30,081				6,912				23,169				—
Total available for sale securities		11,506,434				7,914				11,451,841				46,679
Fair value option securities:
U.S. agency residential mortgage-backed securities		305,445				—				305,445				—
Corporate debt securities		26,442				—				26,442				—
Total fair value option securities		331,887				—				331,887				—
Residential mortgage loans held for sale		325,102				—				325,102				—
Mortgage servicing rights1		89,653				—				—				89,653
Derivative contracts, net of cash margin 2		472,783				8,301				464,482				—
Other assets – private equity funds		28,792				—				—				28,792
Liabilities:
Derivative contracts, net of cash margin 2		435,497				—				435,497				—
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 5, 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 contacts, 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 for the three months ended September 30, 2013 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
		Available for Sale Securities
		Municipal and other tax-exempt				Other debt securities				Equity securities and mutual funds				Other assets – private equity funds
Balance, June 30, 2013		$	38,847			$	5,193			$	2,247			$	28,379
Purchases and capital calls		—				—				—				567
Redemptions and distributions		—				(500		)		—				(1,589		)
Gain (loss) recognized in earnings:
Gain on other assets, net		—				—				—				442
Gain on available for sale securities, net		—				—				—				—
Other-than-temporary impairment losses		(1,369		)		—				—				—
Other comprehensive gain (loss)		2,193				19				1,960				—
Balance, Sept. 30, 2013		$	39,671			$	4,712			$	4,207			$	27,799
The following represents the changes for the nine months ended September 30, 2013 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
		Available for Sale Securities
		Municipal and other tax-exempt				Other debt securities				Equity securities and mutual funds				Other assets – private equity funds
Balance, Dec. 31, 2012		$	40,702			$	5,399			$	2,161			$	28,169
Purchases and capital calls		—				—				—				1,207
Redemptions and distributions		(98		)		(500		)		—				(3,424		)
Gain (loss) recognized in earnings:
Gain on other assets, net		—				—				—				1,847
Gain on available for sale securities, net		—				—				—				—
Other-than-temporary impairment losses		(1,369		)		—				—				—
Other comprehensive gain (loss)		436				(187		)		2,046				—
Balance, Sept. 30, 2013		$	39,671			$	4,712			$	4,207			$	27,799
The following represents the changes for the three months ended September 30, 2012 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
		Available for Sale Securities
		Municipal and other tax-exempt				Other debt securities				Other assets – private equity funds
Balance, June 30, 2012		$	41,662			$	5,388			$	31,492
Purchases, and capital calls		—				—				476
Redemptions and distributions		1				—				(3,906		)
Gain (loss) recognized in earnings
Gain on other assets, net		—				—				730
Gain on available for sale securities, net		—				—				—
Other-than-temporary impairment losses		—				—				—
Other comprehensive (loss)		(384		)		12				—
Balance, Sept. 30, 2012		$	41,279			$	5,400			$	28,792
The following represents the changes for the nine months ended September 30, 2012 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
		Available for Sale Securities
		Municipal and other tax-exempt				Other debt securities				Other assets – private equity funds
Balance, Dec. 31, 2011		$	42,353			$	5,900			$	30,902
Purchases, and capital calls		—				—				2,385
Redemptions and distributions		(462		)		(500		)		(7,072		)
Gain (loss) recognized in earnings
Gain on other assets, net		—				—				2,577
Gain on available for sale securities, net		1				—				—
Other-than-temporary impairment losses		—				—				—
Other comprehensive (loss)		(613		)		—				—
Balance, Sept. 30, 2012		$	41,279			$	5,400			$	28,792
A summary of quantitative information about assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) as of September 30, 2013 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		$	21,545			$	21,467			$	20,531			Discounted cash flows	1	Interest rate spread		4.98%-5.28% (5.15%)	2
																		95.02%-95.55% (95.29%)	3
Below investment grade		23,925				17,924				19,140				Proposed settlement agreement	4	Discount for settlement uncertainty
																		80.00% (80.00%)	3
Total municipal and other tax-exempt securities		45,470				39,391				39,671
Other debt securities		4,900				4,900				4,712				Discounted cash flows	1	Interest rate spread		5.60%-5.68% (5.67%)	5
																		96.16%-96.16% (96.16%)	3
Equity securities and mutual funds		N/A				2,420				4,207				Publicly announced preliminary purchase price information from acquirer.		Discount for settlement uncertainty		N/A	7
Other assets - private equity funds		N/A				N/A				27,799				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 462 to 517 basis points over average yields for comparable tax-exempt securities.
3	Represents fair value as a percentage of par value
4	Fair value based on proposed settlement agreement between bond holders and issuer.
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 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 September 30, 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 $199 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 $45 thousand. For municipal and other tax-exempt securities rated below investment grade by at least one of the nationally-recognized rating agencies, a 100 basis point increase in the spread over average yields for comparable securities would significant change the fair value of these securities.
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 mutual funds		N/A				2,161				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 Recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 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		$	29,100			$	28,999			$	28,848			Discounted cash flows	1	Interest rate spread		1.00%-1.50% (1.25%)	2
																		98.85%-99.47% (99.13%)	3
Below investment grade		17,000				13,396				12,431				Discounted cash flows	1	Interest rate spread		7.20%-9.88% (7.77%)	4
																		73.06%-73.30% (73.13%)	3
Total municipal and other tax-exempt securities		46,100				42,395				41,279
Other debt securities		5,400				5,400				5,400				Discounted cash flows	1	Interest rate spread		1.70%-1.73% (1.71%)	5
																		100.00%-100.00% (100.00%)	3
Other assets - private equity funds		N/A				N/A				28,792				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.
Fair Value of Assets and Liabilities Measured on a Non-Recurring Basis
Assets measured at fair value on a non-recurring basis include 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.
The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2013 for which the fair value was adjusted during the nine months ended September 30, 2013:
													Fair Value Adjustments for the
	Carrying Value at September 30, 2013												Three Months Ended September 30, 2013 Recognized in:							Nine Months Ended September 30, 2013 Recognized in:
	Quoted Prices				Significant				Significant				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net			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	$	—			$	10,607			$	4,787			$	660			$	—		$	6,900	$	—
Real estate and other repossessed assets	—				14,901				170				—				1,767			—		2,560
The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2012 for which the fair value was adjusted during the nine months ended September 30, 2012:
													Fair Value Adjustments for the
	Carrying Value at September 30, 2012												Three Months Ended September 30, 2012 Recognized in:							Nine Months Ended September 30, 2012 Recognized in:
	Quoted Prices				Significant				Significant				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net			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	$	—			$	25,521			$	1,655			$	3,915			$	—		$	10,797	$	—
Real estate and other repossessed assets	—				38,386				6,617				—				4,398			—		11,068
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 the same or 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 September 30, 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		$	4,787			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
Real estate and other repossessed assets		170				Listing value, less cost to sell		Marketability adjustments off appraised value		82%-85% (83%)1
1	Marketability adjustments include consideration of estimated costs to sell which is approximately 15% of fair value.
A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 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		$	1,655			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
Real estate and other repossessed assets		6,617				Listing value, less cost to sell		Marketability adjustments off appraised value		68%-100% (85%)1
1	Marketability adjustments include consideration of estimated costs to sell which is approximately 15% of fair value. In addition, $796 thousand of real estate and other repossessed assets at September 30, 2012 are based on expert opinions or management's knowledge of the collateral or industry and do not have and independently appraised value.
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 basis as of September 30, 2013 (dollars in thousands):
		Carrying				Range of		Average			Discount			Estimated
		Value				Contractual		Re-pricing			Rate			Fair
						Yields		(in years)						Value
Cash and cash equivalents		$	1,133,771											$	1,133,771
Trading securities:
U.S. Government agency debentures		74,632												74,632
U.S. agency residential mortgage-backed securities		26,129												26,129
Municipal and other tax-exempt securities		37,057												37,057
Other trading securities		13,069												13,069
Total trading securities		150,887												150,887
Investment securities:
Municipal and other tax-exempt		409,542												407,562
U.S. agency residential mortgage-backed securities		56,182												58,442
Other debt securities		178,501												188,475
Total investment securities		644,225												654,479
Available for sale securities:
U.S. Treasury		1,052												1,052
Municipal and other tax-exempt		95,440												95,440
U.S. agency residential mortgage-backed securities		7,981,387												7,981,387
Privately issued residential mortgage-backed securities		230,900												230,900
Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,946,295												1,946,295
Other debt securities		35,362												35,362
Perpetual preferred stock		23,680												23,680
Equity securities and mutual funds		58,787												58,787
Total available for sale securities		10,372,903												10,372,903
Fair value option securities:
U.S. agency residential mortgage-backed securities		163,567												163,567
Other securities		4,293												4,293
Total fair value option securities		167,860												167,860
Residential mortgage loans held for sale		230,511												230,511
Loans:
Commercial		7,571,075				0.25% - 30.00%		0.46			0.50% - 4.19%			7,493,143
Commercial real estate		2,349,229				0.38% - 18.00%		0.79			1.20% - 3.42%			2,326,908
Residential mortgage		2,034,765				0.38% - 18.00%		2.56			0.64% - 4.40%			2,056,072
Consumer		395,031				0.38% - 21.00%		0.55			1.24% - 3.71%			388,490
Total loans		12,350,100												12,264,613
Allowance for loan losses		(194,325		)										—
Net loans		12,155,775												12,264,613
Mortgage servicing rights		140,863												140,863
Derivative instruments with positive fair value, net of cash margin		377,325												377,325
Other assets – private equity funds		27,799												27,799
Deposits with no stated maturity		16,771,635												16,771,635
Time deposits		2,720,020				0.01% - 9.64%		2.08			0.75% - 1.28%			2,739,764
Other borrowed funds		3,611,944				0.25% - 4.78%		—			0.06% - 2.65%			3,570,228
Subordinated debentures		347,758				0.95% - 5.00%		2.87			2.22	%		344,854
Derivative instruments with negative fair value, net of cash margin		232,544												232,544
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 basis as of December 31, 2012 (dollars in thousands):
		Carrying				Range of		Average			Discount			Estimated
		Value				Contractual		Re-pricing			Rate			Fair
						Yields		(in years)						Value
Cash and cash equivalents		$	1,286,239											$	1,286,239
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
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			0.80% - 1.15%			3,037,708
Other borrowed funds		2,706,221				0.09% - 5.25%		—			0.09% - 2.67%			2,696,574
Subordinated debentures		347,633				1.00% - 5.00%		3.56			2.4	%		345,675
Derivative instruments with negative fair value, net of cash margin		283,589												283,589
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 basis as of September 30, 2012 (dollars in thousands):
		Carrying				Range of		Average			Discount			Estimated
		Value				Contractual		Re-pricing			Rate			Fair
						Yields		(in years)						Value
Cash and cash equivalents		$	615,494											$	615,494
Trading securities:
U.S. Government agency debentures		3,100												3,100
U.S. agency residential mortgage-backed securities		119,835												119,835
Municipal and other tax-exempt securities		58,150												58,150
Other trading securities		23,157												23,157
Total trading securities		204,242												204,242
Investment securities:
Municipal and other tax-exempt		155,144												159,464
U.S. agency residential mortgage-backed securities		91,911												95,128
Other debt securities		185,059												205,766
Total investment securities		432,114												460,358
Available for sale securities:
U.S. Treasury		1,002												1,002
Municipal and other tax-exempt		87,969												87,969
U.S. agency residential mortgage-backed securities		10,654,821												10,654,821
Privately issued residential mortgage-backed securities		331,722												331,722
Commercial mortgage-backed securities guaranteed by U.S. government agencies		339,095												339,095
Other debt securities		36,456												36,456
Perpetual preferred stock		25,288												25,288
Equity securities and mutual funds		30,081												30,081
Total available for sale securities		11,506,434												11,506,434
Fair value option securities:
U.S. agency residential mortgage-backed securities		305,445												305,445
Corporate debt securities		26,442												26,442
Total fair value option securities		331,887												331,887
Residential mortgage loans held for sale		325,102												325,102
Loans:
Commercial		7,266,907				0.25% - 30.00%		0.64			0.58% - 3.50%			7,232,761
Commercial real estate		2,177,272				0.38% - 18.00%		0.93			1.30% - 3.17%			2,142,239
Residential mortgage		2,016,303				0.38% - 18.00%		3.31			0.99% - 3.17%			2,084,251
Consumer		371,885				0.38% - 21.00%		0.32			1.43% - 3.69%			368,546
Total loans		11,832,367												11,827,797
Allowance for loan losses		(233,756		)										—
Net loans		11,598,611												11,827,797
Mortgage servicing rights		89,653												89,653
Derivative instruments with positive fair value, net of cash margin		472,783												472,783
Other assets – private equity funds		28,791												28,791
Deposits with no stated maturity		16,120,541												16,120,541
Time deposits		3,022,326				0.01% - 9.64%		2.14			0.85% - 1.15%			3,099,183
Other borrowed funds		3,429,575				0.09% - 5.25%		—			0.09% - 2.67%			3,420,135
Subordinated debentures		347,592				1.12% - 5.00%		3.79			2.26	%		345,852
Derivative instruments with negative fair value, net of cash margin		435,497												435,497
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 $153 million at September 30, 2013, $171 million at December 31, 2012 and $193 million at September 30, 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 September 30, 2013, December 31, 2012 or September 30, 2012.
Fair Value Election
As more fully disclosed in Note 2 and Note 5 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.

Federal_and_State_Income_Taxes

Federal and State Income Taxes	9 Months Ended
	Sep. 30, 2013
Effective Income Tax Rate Reconciliation, Percent [Abstract]	'
Federal and State Income Taxes	'
	(12) Federal and State Income Taxes
	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):
		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2013				2012				2013			2012
	Amount:
	Federal statutory tax	$	38,333			$	46,771			$	128,446		$	145,234
	Tax exempt revenue	(1,860		)		(1,398		)		(5,405		)	(3,996		)
	Effect of state income taxes, net of federal benefit	2,072				3,640				8,572			10,210
	Utilization of tax credits	(1,669		)		(718		)		(5,217		)	(3,282		)
	Bank-owned life insurance	(871		)		(931		)		(2,749		)	(2,886		)
	Reduction of tax accrual	(1,400		)		(950		)		(1,400		)	(950		)
	Charitable Contribution to BOKF Foundation	(1,115		)		—				(1,115		)	—
	Other, net	(29		)		(636		)		848			117
	Total	$	33,461			$	45,778			$	121,980		$	144,447
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Percent of pretax income:
	Federal statutory tax	35	%		35	%		35	%		35	%
	Tax exempt revenue	(2	)		(1	)		(1	)		(1	)
	Effect of state income taxes, net of federal benefit	2			3			2			2
	Utilization of tax credits	(1	)		(1	)		(1	)		(1	)
	Bank-owned life insurance	(1	)		(1	)		(1	)		(1	)
	Reduction of tax accrual	(1	)		(1	)		(1	)		—
	Charitable Contribution to BOKF Foundation	(1	)		—			—			—
	Other, net	—			—			—			1
	Total	31	%		34	%		33	%		35	%

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	(13) Subsequent Events
	The Company evaluated events from the date of the consolidated financial statements on September 30, 2013 through the issuance of those consolidated financial statements included in this Quarterly Report on Form 10-Q. No events were identified requiring recognition in and/or disclosure in the consolidated financial statements.

Significant_Accounting_Policie1

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Principles of Consolidation [Policy Text Block]	'
	The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA (“the Bank”), BOSC, Inc., The Milestone Group, Inc. and Cavanal Hill Investment Management Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Arizona, Bank of Arkansas, Bank of Oklahoma, Bank of Texas, Colorado State Bank and Trust, Bank of Kansas City, BOK Financial Mortgage and the TransFund electronic funds network.
Reclassification, Policy [Policy Text Block]	'
	Certain reclassifications have been made to conform to the current period presentation.
Newly Adopted and Pending Accounting Policies [Policy Text Block]	'
	Newly Adopted and Pending Accounting Policies
	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 financial statements prepared under International Financial Reporting Standards by providing information about gross and net exposures. The new disclosure requirements were effective for the Company for interim and annual reporting period beginning 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 the scope of ASU 2011-11 applied for derivative contracts accounted for in accordance with Topic 815, Derivatives and Hedging, including bifurcated embedded derivatives, repurchase agreements and reverse repurchase agreements and securities borrowing and lending transactions 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.
Derivatives, Policy [Policy Text Block]	'
	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 and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value.
	When bilateral netting agreements or similar arrangements 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 derivative contract type by counterparty basis.
	Derivative contracts may 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. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral, in the event of default is reasonably assured. As of September 30, 2013, a decrease in BOK Financial's credit rating to below investment grade would increase our obligation to post cash margin on existing contracts by approximately $27 million.
	None of these derivative contracts have been designated as hedging instruments.
	Customer Risk Management Programs
	BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, and foreign exchange rates, or to take positions in derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans or to-be-announced securities used by mortgage banking customers to hedge their loan production. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize its risk of 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.
	Interest Rate Risk Management Programs
	BOK Financial may use derivative contracts in managing its interest rate sensitivity and as part of its economic hedge of the change in the fair value of mortgage servicing rights. Interest rate swaps are generally used to reduce overall asset sensitivity by converting specific fixed-rate liabilities to floating-rate based on LIBOR. As of September 30, 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 5, 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 5 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.
Loans and Allowances for Credit Losses, 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 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 mortgage loans guaranteed by U.S. government agencies, are as follows.
	Interest is accrued at the applicable interest rate on the principal amount outstanding. 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 more than 90 days 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 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 value, debt service ratio and other underwriting standards. Nonaccruing loans may 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 a quarterly evaluation of available cash resources and collateral value and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 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 may have 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 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 the 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 based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.
	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 credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company’s method for monitoring and assessing credit risk.
Loans and Allowances for Credit Losses, Allowances for Credit Losses [Policy Text Block]	'
	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 5, the Company also has separate accruals for 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 appropriateness of the allowance for loan losses and accrual for off-balance sheet credit losses (collectively "allowance for credit losses") is assessed by management based on an on-going quarterly evaluation of the probable estimated losses inherent in the portfolio, including probable losses on both outstanding loans and unused commitments.
	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, risk concentration and related factors. There have been no material changes in the approach or techniques utilized in developing the allowance for loan losses and the accrual for off-balance sheet credit losses for the three and nine months ended September 30, 2013.
	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 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 or modified in a TDR 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. Collateral value of real property 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 are generally not adjusted by the Company. Updated appraisals are obtained at least annually or more frequently if market conditions indicate collateral values have declined. Collateral value of mineral rights is generally determined by our internal staff of engineers based on projected 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 updated 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 estimated loss rates by loan class. The gross loss rate for each loan class is determined by the greater of the current gross loss rate based on the most recent twelve months or a ten-year gross loss rate. Recoveries are not directly considered in the estimation of 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, gross loss rates are adjusted for changes in risk grading. For each loan class, the current weighted average risk grade is compared to the long-term average risk grade. This comparison determines whether credit risk in each loan class is increasing or decreasing. 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 specific loan classes which have not yet been represented in the 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 loan or loan class. These factors include trends in the economy of our primary lending areas, concentrations in large balance loans and other relevant factors.
	An accrual for off-balance sheet credit losses is included in Other liabilities in the Consolidated Balance Sheets. The appropriateness of this 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.

Securities_Tables

Securities (Tables)	9 Months Ended
	Sep. 30, 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):
			September 30, 2013								December 31, 2012								September 30, 2012
			Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain (Loss)				Fair				Net Unrealized Gain (Loss)
																			Value
	U.S. Government agency debentures		$	74,632			$	(598	)		$	16,545			$	(57	)		$	3,100			$	1
	U.S. agency residential mortgage-backed securities		26,129				456				86,361				447				119,835				566
	Municipal and other tax-exempt securities		37,057				81				90,326				(226		)		58,150				118
	Other trading securities		13,069				(25		)		20,870				(13		)		23,157				(1		)
	Total		$	150,887			$	(86	)		$	214,102			$	151			$	204,242			$	684
Investment Securities (Held-to-Maturity) [Table Text Block]	'
	The amortized cost and fair values of investment securities are as follows (in thousands):
			September 30, 2013
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	409,542			$	409,542			$	407,562			$	2,316			$	(4,296	)
	U.S. agency residential mortgage-backed securities – Other		53,858				56,182				58,442				2,260				—
	Other debt securities		178,501				178,501				188,475				10,094				(120		)
	Total		$	641,901			$	644,225			$	654,479			$	14,670			$	(4,416	)
	1	Carrying value includes $2.3 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 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.
			September 30, 2012
			Amortized				Carrying				Fair				Gross Unrealized2
			Cost				Value1				Value				Gain				Loss
	Municipal and other tax-exempt		$	155,144			$	155,144			$	159,464			$	4,329			$	(9	)
	U.S. agency residential mortgage-backed securities – Other		85,699				91,911				95,128				3,356				(139		)
	Other debt securities		185,059				185,059				205,766				20,737				(30		)
	Total		$	425,902			$	432,114			$	460,358			$	28,422			$	(178	)
	1	Carrying value includes $6.2 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.
	During the three months ended September 30, 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 September 30, 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		$	28,674			$	277,808			$	93,703			$	9,357			$	409,542			3.92
	Fair value		28,928				276,908				92,195				9,531				407,562
	Nominal yield¹		3.35		%		1.52		%		2.29		%		2.74		%		1.85		%
	Other debt securities:
	Carrying value		9,631				32,542				35,539				100,789				178,501				8.78
	Fair value		9,647				32,883				36,445				109,500				188,475
	Nominal yield		3.98		%		5.08		%		5.51		%		6.27		%		5.78		%
	Total fixed maturity securities:
	Carrying value		$	38,305			$	310,350			$	129,242			$	110,146			$	588,043			5.39
	Fair value		38,575				309,791				128,640				119,031				596,037
	Nominal yield		3.51		%		1.9		%		3.17		%		5.97		%		3.04		%
	Residential mortgage-backed securities:
	Carrying value																		$	56,182			³
	Fair value																		58,442
	Nominal yield4																		2.73		%
	Total investment securities:
	Carrying value																		$	644,225
	Fair value																		654,479
	Nominal yield																		3.02		%
	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 4.2 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):
			September 30, 2013
			Amortized				Fair				Gross Unrealized1
			Cost				Value				Gain				Loss				OTTI²
	U.S. Treasury		$	1,052			$	1,052			$	—			$	—			$	—
	Municipal and other tax-exempt		93,897				95,440				2,792				(1,249		)		—
	Residential mortgage-backed securities:
	U. S. government agencies:
	FNMA		4,513,161				4,544,505				81,984				(50,640		)		—
	FHLMC		2,412,948				2,412,116				30,673				(31,505		)		—
	GNMA		978,361				984,065				11,054				(5,350		)		—
	Other		38,979				40,701				1,722				—				—
	Total U.S. government agencies		7,943,449				7,981,387				125,433				(87,495		)		—
	Private issue:
	Alt-A loans		109,234				109,592				2,970				—				(2,612		)
	Jumbo-A loans		118,312				121,308				3,816				(138		)		(682		)
	Total private issue		227,546				230,900				6,786				(138		)		(3,294		)
	Total residential mortgage-backed securities		8,170,995				8,212,287				132,219				(87,633		)		(3,294		)
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,985,924				1,946,295				354				(39,983		)		—
	Other debt securities		35,091				35,362				459				(188		)		—
	Perpetual preferred stock		22,171				23,680				1,534				(25		)		—
	Equity securities and mutual funds		56,348				58,787				2,479				(40		)		—
	Total		$	10,365,478			$	10,372,903			$	139,837			$	(129,118	)		$	(3,294	)
	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.
			September 30, 2012
			Amortized				Fair				Gross Unrealized1
			Cost				Value				Gain				Loss				OTTI²
	U.S. Treasury		$	1,000			$	1,002			$	2			$	—			$	—
	Municipal and other tax-exempt		86,326				87,969				2,760				(152		)		(965		)
	Residential mortgage-backed securities:
	U. S. government agencies:
	FNMA		5,740,232				5,900,174				161,314				(1,372		)		—
	FHLMC		3,322,692				3,400,215				77,523				—				—
	GNMA		1,151,058				1,181,134				30,076				—				—
	Other		167,262				173,298				6,036				—				—
	Total U.S. government agencies		10,381,244				10,654,821				274,949				(1,372		)		—
	Private issue:
	Alt-A loans		128,090				123,583				663				—				(5,170		)
Jumbo-A loans		208,900				208,139				3,617				(152		)		(4,226		)
Total private issue		336,990				331,722				4,280				(152		)		(9,396		)
Total residential mortgage-backed securities		10,718,234				10,986,543				279,229				(1,524		)		(9,396		)
Commercial mortgage-backed securities guaranteed by U.S. government agencies		336,130				339,095				3,271				(306		)		—
Other debt securities		35,710				36,456				746				—				—
Perpetual preferred stock		22,170				25,288				3,118				—				—
Equity securities and mutual funds		25,409				30,081				4,998				(326		)		—
Total		$	11,224,979			$	11,506,434			$	294,124			$	(2,308	)		$	(10,361	)
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 September 30, 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
																					Maturity5
U.S. Treasuries:
Amortized cost	$	1,052			$	—			$	—			$	—			$	1,052			1.42
Fair value	1,052				—				—				—				1,052
Nominal yield	0.24		%		—		%		—		%		—		%		0.24		%
Municipal and other tax-exempt:
Amortized cost	$	1,379			$	34,349			$	5,446			$	52,723			$	93,897			14.5
Fair value	1,404				35,542				5,689				52,805				95,440
Nominal yield¹	—		%		0.97		%		0.51		%		2.62		%	6	1.85		%
Commercial mortgage-backed securities:
Amortized cost	$	—			$	520,499			$	1,150,637			$	314,788			$	1,985,924			10.18
Fair value	—				514,668				1,121,936				309,691				1,946,295
Nominal yield	—		%		1.11		%		1.37		%		1.36		%		1.3		%
Other debt securities:
Amortized cost	$	—			$	30,191			$	—			$	4,900			$	35,091			5.56
Fair value	—				30,650				—				4,712				35,362
Nominal yield	—		%		1.8		%		—		%		1.54		%	6	1.77		%
Total fixed maturity securities:
Amortized cost	$	2,431			$	585,039			$	1,156,083			$	372,411			$	2,115,964			10.29
Fair value	2,456				580,860				1,127,625				367,208				2,078,149
Nominal yield	—		%		1.13		%		1.36		%		1.54		%		1.33		%
Residential mortgage-backed securities:
Amortized cost																	$	8,170,995			2
Fair value																	8,212,287
Nominal yield4																	1.92		%
Equity securities and mutual funds:
Amortized cost																	$	78,519			³
Fair value																	82,467
Nominal yield																	0.7		%
Total available-for-sale securities:
Amortized cost																	$	10,365,478
Fair value																	10,372,903
Nominal yield																	1.79		%
1	Calculated on a taxable equivalent basis using a 39% effective tax rate.
2	The average expected lives of mortgage-backed securities were 3.5 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):
	Three Months Ended								Nine Months Ended
	September 30,								September 30,
	2013				2012				2013				2012
Proceeds	$	355,650			$	209,325			$	2,140,531			$	1,660,876
Gross realized gains	3,164				7,967				18,948				40,133
Gross realized losses	(2,686		)		—				(9,862		)		(7,354		)
Related federal and state income tax expense	184				3,099				3,533				12,751
Securities Pledged As Collateral [Table Text Block]	'
		September 30,				December 31,				September 30,
		2013				2012				2012
	Investment:
	Carrying value	$	92,442			$	117,346			$	153,224
	Fair value	95,658				121,647				158,899
	Available for sale:
	Amortized cost	5,020,732				4,070,250				3,634,955
	Fair value	5,009,611				4,186,390				3,763,664
Schedule of Unrealized Loss on Investments [Table Text Block]	'
	or September 30, 2012.
	Temporarily Impaired Securities as of September 30, 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		136			$	257,359			$	4,292			$	803			$	4			$	258,162			$	4,296
	U.S. Agency residential mortgage-backed securities – Other		—			—				—				—				—				—				—
	Other debt securities		29			1,326				59				780				61				2,106				120
	Total investment		165			$	258,685			$	4,351			$	1,583			$	65			$	260,268			$	4,416
			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:
	U.S. Treasury		—			$	—			$	—			$	—			$	—			$	—			$	—
	Municipal and other tax-exempt1		46			$	20,274			$	352			$	19,575			$	897			$	39,849			$	1,249
	Residential mortgage-backed securities:
	U. S. agencies:
	FNMA		79			2,328,213				50,640				—				—				2,328,213				50,640
	FHLMC		46			1,402,010				31,505				—				—				1,402,010				31,505
	GNMA		23			674,512				5,350				—				—				674,512				5,350
	Total U.S. agencies		148			4,404,735				87,495				—				—				4,404,735				87,495
	Private issue1:
	Alt-A loans		10			11,336				707				48,849				1,905				60,185				2,612
	Jumbo-A loans		10			15,326				682				11,742				138				27,068				820
	Total private issue		20			26,662				1,389				60,591				2,043				87,253				3,432
	Total residential mortgage-backed securities		168			4,431,397				88,884				60,591				2,043				4,491,988				90,927
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		116			1,803,008				39,983				—				—				1,803,008				39,983
	Other debt securities		3			4,712				188				—				—				4,712				188
	Perpetual preferred stocks		1			4,975				25				—				—				4,975				25
	Equity securities and mutual   funds		97			1,529				40				—				—				1,529				40
	Total available for sale		431			$	6,265,895			$	129,472			$	80,166			$	2,940			$	6,346,061			$	132,412
	1Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:
	Municipal and other tax-exempt		—			$	—			$	—			$	—			$	—			$	—			$	—
	Alt-A loans		10			11,336				707				48,849				1,905				60,185				2,612
	Jumbo-A loans		9			15,326				682				—				—				15,326				682
	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:
Municipal and other tax-exempt		—			$	—			$	—			$	—			$	—			$	—			$	—
Alt-A loans		12			$	—			$	—			$	87,907			$	2,580			$	87,907			$	2,580
Jumbo-A loans		10			—				—				29,128				1,602				29,128				1,602
Temporarily Impaired Securities as of September 30, 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		6			$	7,548			$	9			$	—			$	—			$	7,548			$	9
U.S. Agency residential mortgage-backed securities – Other		1			—				—				19,066				139				19,066				139
Other debt securities		14			871				30				—				—				871				30
Total investment		21			$	8,419			$	39			$	19,066			$	139			$	27,485			$	178
		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-exempt1		51			$	13,492			$	970			$	27,485			$	147			$	40,977			$	1,117
Residential mortgage-backed securities:
U. S. agencies:
FNMA		12			483,258				1,372				—				—				483,258				1,372
FHLMC		—			—				—				—				—				—				—
GNMA		—			—				—				—				—				—				—
Total U.S. agencies		12			483,258				1,372				—				—				483,258				1,372
Private issue1:
Alt-A loans		13			—				—				105,862				5,170				105,862				5,170
Jumbo-A loans		15			—				—				121,746				4,378				121,746				4,378
Total private issue		28			—				—				227,608				9,548				227,608				9,548
Total residential mortgage-backed securities		40			483,258				1,372				227,608				9,548				710,866				10,920
Commercial mortgage-backed securities guaranteed by U.S. government agencies		8			42,445				306				—				—				42,445				306
Other debt securities		—			—				—				—				—				—				—
Perpetual preferred stocks		—			—				—				—				—				—				—
Equity securities and mutual funds		2			2,551				326				—				—				2,551				326
Total available for sale		101			$	541,746			$	2,974			$	255,093			$	9,695			$	796,839			$	12,669
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:
Municipal and other tax-exempt		21			$	12,431			$	965			$	—			$	—			$	12,431			$	965
Alt-A loans		13			—				—				105,862				5,170				105,862				5,170
Jumbo-A loans		14			—				—				107,071				4,226				107,071				4,226
On a quarterly basis, the
Investments by Lowest Credit Rating [Table Text Block]	'
	At September 30, 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		$	—			$	—			$	275,067			$	271,781			$	21,162			$	21,405			$	—	$	—	$	113,313	$	114,376	$	409,542	$	407,562
	Mortgage-backed securities -- other		56,182				58,442				—				—				—				—				—		—		—		—		56,182		58,442
	Other debt securities		—				—				167,463				177,502				—				—				—		—		11,038		10,973		178,501		188,475
	Total investment securities		$	56,182			$	58,442			$	442,530			$	449,283			$	21,162			$	21,405			$	—	$	—	$	124,351	$	125,349	$	644,225	$	654,479
			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		$	1,052			$	1,052			$	—			$	—			$	—			$	—			$	—	$	—	$	—	$	—	$	1,052	$	1,052
	Municipal and other tax-exempt		—				—				47,747				48,564				15,819				15,525				17,924		19,140		12,407		12,211		93,897		95,440
	Residential mortgage-backed securities:
	U. S. government agencies:
	FNMA		4,513,161				4,544,505				—				—				—				—				—		—		—		—		4,513,161		4,544,505
	FHLMC		2,412,948				2,412,116				—				—				—				—				—		—		—		—		2,412,948		2,412,116
	GNMA		978,361				984,065				—				—				—				—				—		—		—		—		978,361		984,065
	Other		38,979				40,701				—				—				—				—				—		—		—		—		38,979		40,701
	Total U.S. government agencies		7,943,449				7,981,387				—				—				—				—				—		—		—		—		7,943,449		7,981,387
	Private issue:
	Alt-A loans		—				—				—				—				—				—				109,234		109,592		—		—		109,234		109,592
	Jumbo-A loans		—				—				—				—				—				—				118,312		121,308		—		—		118,312		121,308
	Total private issue		—				—				—				—				—				—				227,546		230,900		—		—		227,546		230,900
	Total residential mortgage-backed securities		7,943,449				7,981,387				—				—				—				—				227,546		230,900		—		—		8,170,995		8,212,287
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,985,924				1,946,295				—				—				—				—				—		—		—		—		1,985,924		1,946,295
	Other debt securities		—				—				4,900				4,712				30,191				30,650				—		—		—		—		35,091		35,362
	Perpetual preferred stock		—				—				—				—				11,406				11,822				10,765		11,858		—		—		22,171		23,680
	Equity securities and mutual funds		—				—				4				441				—				—				—		—		56,344		58,346		56,348		58,787
	Total available for sale securities		$	9,930,425			$	9,928,734			$	52,651			$	53,717			$	57,416			$	57,997			$	256,235	$	261,898	$	68,751	$	70,557	$	10,365,478	$	10,372,903
	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 Privately Issued Residential Mortgage-backed Securities [Table Text Block]	'
														Credit Losses Recognized
														Three months ended
														September 30, 2013							Life-to-date
			Number of Securities			Amortized Cost				Fair Value				Number of			Amount				Number of Securities			Amount
														Securities
	Alt-A		16			$	109,234			$	109,592			1			$	139			16			$	49,126
	Jumbo-A		29			118,312				121,308				—			—				29			18,220
	Total		45			$	227,546			$	230,900			1			$	139			45			$	67,346
Other-than-temporary impairement, Private Lable Mortgage-Backed Securities, Assumptions Used to Develop Projected Cash Flows [Table Text Block]	'
	The primary assumptions used in this evaluation were:
		September 30,		December 31,		September 30,
		2013		2012		2012
	Unemployment rate	Increasing to 7.5% over the next 12 months and remain at 7.5% thereafter		Increasing to 8.5% over the next 12 months, dropping to 8% over the following 21 months and holding at 8% 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 5% 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.		Starting with current depreciated housing prices based on information derived from the FHFA1, depreciating 2% over the next 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.		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.		Estimated cash flows were discounted at rates that range from 2.00% to 6.25% based on our current expected yields.
Rollforward Other-than-temporary Impairment Credit Losses Recognized in Earnings [Table Text Block]	'
			Three Months Ended								Nine Months Ended
			September 30,								September 30,
			2013				2012				2013				2012
	Balance of credit-related OTTI recognized on available for sale debt, beginning of period		$	76,027			$	72,915			$	75,228			$	76,131
	Additions for credit-related OTTI not previously recognized		67				—				619				248
	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		73				1,104				320				5,436
	Reductions for change in intent to hold before recovery		(3,589		)		—				(3,589		)		—
	Sales		(5,232		)		—				(5,232		)		(7,796		)
	Balance of credit-related OTTI recognized on available for sale debt securities, end of period		$	67,346			$	74,019			$	67,346			$	74,019
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):
			September 30, 2013								December 31, 2012								September 30, 2012
			Fair Value				Net Unrealized Gain (Loss)				Fair Value				Net Unrealized Gain				Fair				Net Unrealized Gain
																			Value
	U.S. agency residential mortgage-backed securities		$	163,567			$	(5,365	)		$	257,040			$	3,314			$	305,445			$	13,827
	Corporate debt securities		—				—				26,486				1,409				26,442				1,359
	Other securities		4,293				1				770				47				—				—
	Total		$	167,860			$	(5,364	)		$	284,296			$	4,770			$	331,887			$	15,186

Derivatives_Tables

Derivatives (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 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		$	12,455,689		$	224,392		$	(99,970	)	$	124,422	$	(5,191	)	$	119,231
	Interest rate swaps		1,361,499			49,183			—			49,183		—			49,183
	Energy contracts		1,412,238			73,293			(42,078		)	31,215		(606		)	30,609
	Agricultural contracts		262,770			5,783			(3,430		)	2,353		—			2,353
	Foreign exchange contracts		164,970			164,970			—			164,970		—			164,970
	Equity option contracts		212,452			14,339			—			14,339		(3,360		)	10,979
	Total customer risk management programs		15,869,618			531,960			(145,478		)	386,482		(9,157		)	377,325
	Interest rate risk management programs		—			—			—			—		—			—
	Total derivative contracts		$	15,869,618		$	531,960		$	(145,478	)	$	386,482	$	(9,157	)	$	377,325
			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		$	12,529,704		$	221,720		$	(99,970	)	$	121,750	$	(118,166	)	$	3,584
	Interest rate swaps		1,361,499			49,518			—			49,518		(21,240		)	28,278
	Energy contracts		1,400,542			71,971			(42,078		)	29,893		(10,762		)	19,131
	Agricultural contracts		261,782			5,731			(3,430		)	2,301		(2,242		)	59
	Foreign exchange contracts		164,455			164,455			—			164,455		—			164,455
	Equity option contracts		212,452			14,339			—			14,339		—			14,339
	Total customer risk management programs		15,930,434			527,734			(145,478		)	382,256		(152,410		)	229,846
	Interest rate risk management programs		47,000			2,698			—			2,698		—			2,698
	Total derivative contracts		$	15,977,434		$	530,432		$	(145,478	)	$	384,954	$	(152,410	)	$	232,544
	1	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
	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
			Notional			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
			Notional			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 table summarizes the fair values of derivative contracts recorded as “derivative contracts” assets and liabilities in the balance sheet at September 30, 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		$	14,858,520		$	276,678		$	(121,573	)	$	155,105	$	(7,287	)	$	147,818
	Interest rate swaps		1,301,109			79,350			—			79,350		—			79,350
Energy contracts		1,556,164			105,588			(67,030		)	38,558		(3,866		)	34,692
Agricultural contracts		198,735			6,835			(6,011		)	824		—			824
Foreign exchange contracts		150,232			150,232			—			150,232		—			150,232
Equity option contracts		217,283			14,460			—			14,460		—			14,460
Total customer risk management programs		18,282,043			633,143			(194,614		)	438,529		(11,153		)	427,376
Interest rate risk management programs		66,000			8,277			—			8,277		—			8,277
Total derivative contracts		$	18,348,043		$	641,420		$	(194,614	)	$	446,806	$	(11,153	)	$	435,653
		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		$	14,738,232		$	274,195		$	(121,573	)	$	152,622	$	(143,945	)	$	8,677
Interest rate swaps		1,301,109			79,937			—			79,937		(37,841		)	42,096
Energy contracts		1,596,791			107,556			(67,030		)	40,526		(2,836		)	37,690
Agricultural contracts		195,068			6,750			(6,011		)	739		—			739
Foreign exchange contracts		149,977			149,977			—			149,977		—			149,977
Equity option contracts		217,283			14,460			—			14,460		—			14,460
Total customer risk management programs		18,198,460			632,875			(194,614		)	438,261		(184,622		)	253,639
Interest rate risk management programs		25,000			783			—			783		—			783
Total derivative contracts		$	18,223,460		$	633,658		$	(194,614	)	$	439,044	$	(184,622	)	$	254,422
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 income statement (in thousands):
			Three Months Ended
			September 30, 2013						September 30, 2012
			Brokerage			Gain (Loss)			Brokerage			Gain (Loss)
			and Trading Revenue			on Derivatives, Net			and Trading			on Derivatives,
									Revenue			Net
	Customer Risk Management Programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	(2,078	)	$	—		$	(803	)	$	—
	Interest rate swaps		679			—			706			—
	Energy contracts		1,682			—			1,856			—
	Agricultural contracts		69			—			115			—
	Foreign exchange contracts		192			—			124			—
	Equity option contracts		—			—			—			—
	Total customer risk management programs		544			—			1,998			—
	Interest Rate Risk Management Programs		—			31			—			464
	Total Derivative Contracts		$	544		$	31		$	1,998		$	464
			Nine Months Ended
			September 30, 2013						September 30, 2012
			Brokerage			Gain (Loss)			Brokerage			Gain (Loss)
			and Trading Revenue			on Derivatives, Net			and Trading			on Derivatives,
									Revenue			Net
	Customer Risk Management Programs:
	Interest rate contracts
	To-be-announced residential mortgage-backed securities		$	(377	)	$	—		$	504		$	—
	Interest rate swaps		2,214			—			2,850			—
	Energy contracts		5,901			—			6,754			—
	Agricultural contracts		254			—			298			—
	Foreign exchange contracts		552			—			455			—
	Equity option contracts		—			—			—			—
	Total customer risk management programs		8,544			—			10,861			—
	Interest Rate Risk Management Programs		—			(3,437		)	—			336
	Total Derivative Contracts		$	8,544		$	(3,437	)	$	10,861		$	336

Loans_and_Allowances_for_Credi1

Loans and Allowances for Credit Losses (Tables)	9 Months Ended
	Sep. 30, 2013
Loans Receivable, Net [Abstract]	'
Schedule of Loans by Portfolio Segment [Table Text Block]	'
	Portfolio segments of the loan portfolio are as follows (in thousands):
			September 30, 2013																December 31, 2012
			Fixed				Variable				Non-accrual				Total				Fixed				Variable				Non-accrual			Total
			Rate				Rate												Rate				Rate
	Commercial		$	4,209,349			$	3,342,204			$	19,522			$	7,571,075			$	4,158,548			$	3,458,897			$	24,467		$	7,641,912
	Commercial real estate		869,346				1,427,381				52,502				2,349,229				845,023				1,323,350				60,626			2,228,999
	Residential mortgage		1,766,819				228,690				39,256				2,034,765				1,747,038				251,394				46,608			2,045,040
	Consumer		137,193				256,214				1,624				395,031				175,412				217,384				2,709			395,505
	Total		$	6,982,707			$	5,254,489			$	112,904			$	12,350,100			$	6,926,021			$	5,251,025			$	134,410		$	12,311,456
	Accruing loans past due (90 days)1														$	188														$	3,925
			September 30, 2012
			Fixed				Variable				Non-accrual				Total
			Rate				Rate
	Commercial		$	3,889,382			$	3,355,763			$	21,762			$	7,266,907
	Commercial real estate		880,535				1,220,976				75,761				2,177,272
	Residential mortgage		1,728,220				258,816				29,267				2,016,303
	Consumer		181,614				185,162				5,109				371,885
	Total		$	6,679,751			$	5,020,717			$	131,899			$	11,832,367
	Accruing loans past due (90 days)1														$	1,181
	1	Excludes residential mortgage loans guaranteed by agencies of the U.S. government
Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]	'
	The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the three months ended September 30, 2013 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific Allowance				Total
	Allowance for loan losses:
	Beginning balance		$	64,044			$	49,687			$	39,206			$	7,738			$	42,449			$	203,124
	Provision for loan losses		(1,774		)		(6,279		)		(136		)		1,256				(1,567		)		(8,500		)
	Loans charged off		(1,354		)		(419		)		(961		)		(1,974		)		—				(4,708		)
	Recoveries		864				2,073				188				1,284				—				4,409
	Ending balance		$	61,780			$	45,062			$	38,297			$	8,304			$	40,882			$	194,325
	Allowance for off-balance sheet credit losses:
	Beginning balance		$	402			$	1,178			$	6			$	18			$	—			$	1,604
	Provision for off-balance sheet credit losses		(228		)		202				42				(16		)		—				—
	Ending balance		$	174			$	1,380			$	48			$	2			$	—			$	1,604
	Total provision for credit losses		$	(2,002	)		$	(6,077	)		$	(94	)		$	1,240			$	(1,567	)		$	(8,500	)
	The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the nine months ended September 30, 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		(3,507		)		(10,077		)		187				513				(3,305		)		(16,189		)
	Loans charged off		(6,190		)		(5,669		)		(4,797		)		(5,513		)		—				(22,169		)
	Recoveries		6,197				5,924				1,204				3,851				—				17,176
	Ending balance		$	61,780			$	45,062			$	38,297			$	8,304			$	40,882			$	194,325
	Allowance for off-balance sheet credit losses:
	Beginning balance		$	475			$	1,353			$	78			$	9			$	—			$	1,915
	Provision for off-balance sheet credit losses		(301		)		27				(30		)		(7		)		—				(311		)
	Ending balance		$	174			$	1,380			$	48			$	2			$	—			$	1,604
	Total provision for credit losses		$	(3,808	)		$	(10,050	)		$	157			$	506			$	(3,305	)		$	(16,500	)
	The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the three months ended September 30, 2012 is summarized as follows (in thousands):
			Commercial				Commercial Real Estate				Residential Mortgage				Consumer				Nonspecific Allowance				Total
	Allowance for loan losses:
	Beginning balance		$	83,477			$	55,806			$	42,688			$	8,840			$	40,858			$	231,669
	Provision for loan losses		4				4,821				(370		)		3,293				56				7,804
	Loans charged off		(812		)		(2,607		)		(1,600		)		(3,902		)		—				(8,921		)
	Recoveries		(890		)	1	2,684				298				1,112				—				3,204
	Ending balance		$	81,779			$	60,704			$	41,016			$	9,343			$	40,914			$	233,756
	Allowance for off-balance sheet credit losses:
	Beginning balance		$	8,224			$	1,425			$	80			$	18			$	—			$	9,747
	Provision for off-balance sheet credit losses		(7,823		)		18				(4		)		5				—				(7,804		)
	Ending balance		$	401			$	1,443			$	76			$	23			$	—			$	1,943
	Total provision for credit losses		$	(7,819	)		$	4,839			$	(374	)		$	3,298			$	56			$	—
	1	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa by the Oklahoma Supreme Court. Excluding this refund, BOK Financial had net charge-offs (recoveries) to average loans of (0.05%) on an annualized basis.
	The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the nine months ended September 30, 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		995				(322		)		528				3,553				(5,436		)		(682		)
	Loans charged off		(7,840		)		(10,548		)		(7,447		)		(8,303		)		—				(34,138		)
	Recoveries		5,181			1	4,540				1,459				3,915				—				15,095
	Ending balance		$	81,779			$	60,704			$	41,016			$	9,343			$	40,914			$	233,756
	Allowance for off-balance sheet credit losses:
	Beginning balance		$	7,906			$	1,250			$	91			$	14			$	—			$	9,261
	Provision for off-balance sheet credit losses		(7,505		)		193				(15		)		9				—				(7,318		)
	Ending balance		$	401			$	1,443			$	76			$	23			$	—			$	1,943
	Total provision for credit losses		$	(6,510	)		$	(129	)		$	513			$	3,562			$	(5,436	)		$	(8,000	)
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 September 30, 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		$	7,551,553			$	61,208			$	19,522			$	572			$	7,571,075			$	61,780
	Commercial real estate		2,296,727				44,574				52,502				488				2,349,229				45,062
	Residential mortgage		1,996,086				38,083				38,679				214				2,034,765				38,297
	Consumer		393,407				8,304				1,624				—				395,031				8,304
	Total		12,237,773				152,169				112,327				1,274				12,350,100				153,443
	Nonspecific allowance		—				—				—				—				—				40,882
	Total		$	12,237,773			$	152,169			$	112,327			$	1,274			$	12,350,100			$	194,325
	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		1,998,921				40,934				46,119				769				2,045,040				41,703
	Consumer		392,796				9,328				2,709				125				395,505				9,453
	Total		12,177,535				167,087				133,921				4,233				12,311,456				171,320
	Nonspecific allowance		—				—				—				—				—				44,187
	Total		$	12,177,535			$	167,087			$	133,921			$	4,233			$	12,311,456			$	215,507
	The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at September 30, 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		$	7,245,145			$	81,575			$	21,762			$	204			$	7,266,907			$	81,779
	Commercial real estate		2,101,511				57,587				75,761				3,117				2,177,272				60,704
	Residential mortgage		1,987,546				40,799				28,757				217				2,016,303				41,016
	Consumer		366,776				9,214				5,109				129				371,885				9,343
	Total		11,700,978				189,175				131,389				3,667				11,832,367				192,842
	Nonspecific allowance		—				—				—				—				—				40,914
	Total		$	11,700,978			$	189,175			$	131,389			$	3,667			$	11,832,367			$	233,756
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 September 30, 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		$	7,553,151			$	60,570			$	17,924			$	1,210			$	7,571,075			$	61,780
	Commercial real estate		2,349,229				45,062				—				—				2,349,229				45,062
	Residential mortgage		236,399				3,764				1,798,366				34,533				2,034,765				38,297
	Consumer		268,690				2,797				126,341				5,507				395,031				8,304
	Total		10,407,469				112,193				1,942,631				41,250				12,350,100				153,443
	Nonspecific allowance		—				—				—				—				—				40,882
	Total		$	10,407,469			$	112,193			$	1,942,631			$	41,250			$	12,350,100			$	194,325
	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
	The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at September 30, 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		$	7,249,429			$	80,676			$	17,478			$	1,103			$	7,266,907			$	81,779
	Commercial real estate		2,177,235				60,704				37				—				2,177,272				60,704
	Residential mortgage		275,490				6,416				1,740,813				34,600				2,016,303				41,016
	Consumer		202,897				2,711				168,988				6,632				371,885				9,343
	Total		9,905,051				150,507				1,927,316				42,335				11,832,367				192,842
	Nonspecific allowance		—				—				—				—				—				40,914
	Total		$	9,905,051			$	150,507			$	1,927,316			$	42,335			$	11,832,367			$	233,756
Schedule of Credit Quality Indicators [Table Text Block]	'
	The following table summarizes the Company’s loan portfolio at September 30, 2013 by the risk grade categories (in thousands):
			Internally Risk Graded												Non-Graded
			Performing				Potential Problem				Nonaccrual				Performing				Nonaccrual				Total
	Commercial:
	Energy		$	2,305,225			$	4,813			$	1,953			$	—			$	—			$	2,311,991
	Services		2,130,169				11,455				6,927				—				—				2,148,551
	Wholesale/retail		1,171,923				2,660				7,223				—				—				1,181,806
	Manufacturing		378,723				2,894				843				—				—				382,460
	Healthcare		1,158,436				43				1,733				—				—				1,160,212
	Integrated food services		136,650				4,790				—				—				—				141,440
	Other commercial and industrial		225,895				—				796				17,877				47				244,615
	Total commercial		7,507,021				26,655				19,475				17,877				47				7,571,075
	Commercial real estate:
	Construction and land development		178,278				17,394				20,784				—				—				216,456
	Retail		548,197				807				7,914				—				—				556,918
	Office		413,083				2,122				6,838				—				—				422,043
	Multifamily		504,548				11,556				4,350				—				—				520,454
	Industrial		244,768				254				—				—				—				245,022
	Other commercial real estate		365,051				10,669				12,616				—				—				388,336
	Total commercial real estate		2,253,925				42,802				52,502				—				—				2,349,229
	Residential mortgage:
	Permanent mortgage		222,630				4,633				5,441				819,601				26,356				1,078,661
	Permanent mortgages guaranteed by U.S. government agencies		—				—				—				163,342				577				163,919
	Home equity		3,695				—				—				781,608				6,882				792,185
	Total residential mortgage		226,325				4,633				5,441				1,764,551				33,815				2,034,765
	Consumer:
	Indirect automobile		—				—				—				9,800				957				10,757
	Other consumer		267,564				846				280				115,197				387				384,274
	Total consumer		267,564				846				280				124,997				1,344				395,031
	Total		$	10,254,835			$	74,936			$	77,698			$	1,907,425			$	35,206			$	12,350,100
	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				Nonaccrual				Performing				Nonaccrual				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:
	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
	The following table summarizes the Company’s loan portfolio at September 30, 2012 by the risk grade categories (in thousands):
			Internally Risk Graded												Non-Graded
			Performing				Potential Problem				Nonaccrual				Performing				Nonaccrual				Total
Commercial:
Energy		$	2,403,364			$	10,450			$	3,063			$	—			$	—			$	2,416,877
Services		1,923,017				34,452				10,099				—				—				1,967,568
Wholesale/retail		1,053,813				4,241				2,007				—				—				1,060,061
Manufacturing		330,608				10,469				2,283				—				—				343,360
Healthcare		1,019,362				184				3,305				—				—				1,022,851
Integrated food services		199,769				684				—				—				—				200,453
Other commercial and industrial		231,890				5,437				932				17,405				73				255,737
Total commercial		7,161,823				65,917				21,689				17,405				73				7,266,907
Commercial real estate:
Construction and land development		230,022				25,568				38,143				—				—				293,733
Retail		520,568				8,196				6,692				—				—				535,456
Office		391,859				12,554				9,833				—				—				414,246
Multifamily		383,317				6,667				3,145				—				—				393,129
Industrial		175,339				4,443				4,064				—				—				183,846
Other commercial real estate		329,659				13,319				13,847				—				37				356,862
Total commercial real estate		2,030,764				70,747				75,724				—				37				2,177,272
Residential mortgage:
Permanent mortgage		253,859				11,776				9,855				850,118				13,352				1,138,960
Permanent mortgages guaranteed by U.S. government agencies		—				—				—				161,761				510				162,271
Home equity		—				—				—				709,522				5,550				715,072
Total residential mortgage		253,859				11,776				9,855				1,721,401				19,412				2,016,303
Consumer:
Indirect automobile		—				—				—				45,349				1,932				47,281
Other consumer		198,419				1,663				2,815				121,345				362				324,604
Total consumer		198,419				1,663				2,815				166,694				2,294				371,885
Total		$	9,644,865			$	150,103			$	110,083			$	1,905,500			$	21,816			$	11,832,367
Summary of Impaired Loans [Table Text Block]	'
	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 TDR and all loans repurchased from GNMA pools.
	A summary of impaired loans follows (in thousands):
		As of																				For the							For the
		September 30, 2013																				Three Months Ended							Nine Months Ended
						Recorded Investment																September 30, 2013							September 30, 2013
		Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized			Average Recorded			Interest Income Recognized
		Principal								Allowance												Investment							Investment
		Balance
	Commercial:
	Energy	$	1,954			$	1,953			$	1,953			$	—			$	—			$	2,115			$	—		$	2,207		$	—
	Services	9,105				6,927				5,789				1,138				515				7,188				—			9,509			—
	Wholesale/retail	11,262				7,223				7,188				35				9				6,962				—			5,150			—
	Manufacturing	1,051				843				843				—				—				860				—			1,425			—
	Healthcare	2,340				1,733				1,685				48				48				2,202				—			2,450			—
	Integrated food services	—				—				—				—				—				—				—			342			—
	Other commercial and industrial	8,535				843				843				—				—				871				—			913			—
	Total commercial	34,247				19,522				18,301				1,221				572				20,198				—			21,996			—
	Commercial real estate:
	Construction and land development	24,219				20,784				20,395				389				148				20,960				—			23,458			—
	Retail	9,380				7,914				7,914				—				—				8,160				—			8,016			—
	Office	8,254				6,838				6,830				8				8				7,333				—			6,834			—
	Multifamily	4,351				4,350				4,350				—				—				5,399				—			3,528			—
	Industrial	—				—				—				—				—				—				—			1,984			—
	Other real estate loans	14,868				12,616				12,020				596				332				13,747				—			12,746			—
	Total commercial real estate	61,072				52,502				51,509				993				488				55,599				—			56,566			—
	Residential mortgage:
	Permanent mortgage	39,648				31,797				31,527				270				214				32,272				539			35,829			1,142
	Permanent mortgage guaranteed by U.S. government agencies1	171,935				163,919				163,919				—				—				162,497				1,722			162,337			5,130
	Home equity	7,091				6,882				6,882				—				—				7,293				—			6,569			—
	Total residential mortgage	218,674				202,598				202,328				270				214				202,062				2,261			204,735			6,272
	Consumer:
	Indirect automobile	960				957				957				—				—				1,073				—			1,268			—
	Other consumer	677				667				667				—				—				758				—			899			—
	Total consumer	1,637				1,624				1,624				—				—				1,831				—			2,167			—
	Total	$	315,630			$	276,246			$	273,762			$	2,484			$	1,274			$	279,690			$	2,261		$	285,464		$	6,272
	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 September 30, 2013, $577 thousand of these loans were nonaccruing and $163 million were 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, are recovered.
	A summary of impaired loans at December 31, 2012 follows (in thousands):
							Recorded Investment
			Unpaid				Total				With No				With Allowance				Related Allowance
			Principal								Allowance
			Balance
	Commercial:
	Energy		$	2,460			$	2,460			$	2,460			$	—			$	—
	Services		15,715				12,090				11,940				150				149
	Wholesale/retail		9,186				3,077				3,016				61				15
	Manufacturing		2,447				2,007				2,007				—				—
	Healthcare		4,256				3,166				2,050				1,116				66
	Integrated food services		684				684				684				—				—
	Other commercial and industrial		8,482				983				983				—				—
	Total commercial		43,230				24,467				23,140				1,327				230
	Commercial real estate:
	Construction and land development		44,721				26,131				25,575				556				155
	Retail		9,797				8,117				8,117				—				—
	Office		8,949				6,829				6,604				225				21
	Multifamily		3,189				2,706				2,706				—				—
	Industrial		3,968				3,968				—				3,968				2,290
	Other real estate loans		15,377				12,875				10,049				2,826				643
	Total commercial real estate		86,001				60,626				53,051				7,575				3,109
	Residential mortgage:
	Permanent mortgage		51,153				39,863				37,564				2,299				769
	Permanent mortgage guaranteed by U.S. government agencies1		170,740				160,444				160,444				—				—
Home equity		6,256				6,256				6,256				—				—
Total residential mortgage		228,149				206,563				204,264				2,299				769
Consumer:
Indirect automobile		1,578				1,578				1,578				—				—
Other consumer		1,300				1,131				1,006				125				125
Total consumer		2,878				2,709				2,584				125				125
Total		$	360,258			$	294,365			$	283,039			$	11,326			$	4,233
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 were nonaccruing and $160 million were accruing based on the guarantee by U.S. government agencies.
A summary of impaired loans at September 30, 2012 follows (in thousands):
	As of																				For the							For the
	As of September 30, 2012																				Three Months Ended							Nine Months Ended
					Recorded Investment																September 30, 2012							September 30, 2012
	Unpaid				Total				With No				With Allowance				Related Allowance				Average Recorded				Interest Income Recognized			Average Recorded			Interest Income Recognized
	Principal								Allowance												Investment							Investment
	Balance
Commercial:
Energy	$	3,273			$	3,063			$	3,063			$	—			$	—			$	3,075			$	—		$	1,700		$	—
Services	13,135				10,099				9,978				121				120				10,111				—			13,534			—
Wholesale/retail	8,039				2,007				1,937				70				18				3,091				—			11,594			—
Manufacturing	6,548				2,283				2,283				—				—				7,257				—			12,667			—
Healthcare	4,395				3,305				2,159				1,146				66				3,308				—			4,396			—
Integrated food services	—				—				—				—				—				—				—			—			—
Other commercial and industrial	8,504				1,005				1,005				—				—				1,305				—			1,398			—
Total commercial	43,894				21,762				20,425				1,337				204				28,147				—			45,289			—
Commercial real estate:
Construction and land development	67,087				38,143				37,579				564				155				42,097				—			50,009			—
Retail	8,372				6,692				6,692				—				—				7,300				—			6,778			—
Office	13,736				9,833				9,608				225				21				10,211				—			10,645			—
Multifamily	3,259				3,145				3,145				—				—				3,182				—			3,329			—
Industrial	4,064				4,064				—				4,064				2,290				2,032				—			2,032			—
Other real estate loans	16,473				13,884				11,454				2,430				651				13,166				—			14,685			—
Total commercial real estate	112,991				75,761				68,478				7,283				3,117				77,988				—			87,478			—
Residential mortgage:
Permanent mortgage	31,068				23,207				22,906				301				217				20,672				398			24,287			1,193
Permanent mortgage guaranteed by U.S. government agencies1	169,622				162,271				162,271				—				—				163,863				1,680			178,542			5,039
Home equity	5,550				5,550				5,550				—				—				5,071				—			4,976			—
Total residential mortgage	206,240				191,028				190,727				301				217				189,606				2,078			207,805			6,232
Consumer:
Indirect automobile	1,932				1,932				1,932				—				—				2,095				—			2,063			—
Other consumer	5,219				3,177				3,048				129				129				3,967				—			2,249			—
Total consumer	7,151				5,109				4,980				129				129				6,062				—			4,312			—
Total	$	370,276			$	293,660			$	284,610			$	9,050			$	3,667			$	301,803			$	2,078		$	344,884		$	6,232
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 September 30, 2012, $510 thousand of these loans were nonaccruing and $162 million were accruing based on the guarantee by U.S. government agencies.
Troubled Debt Restructurings [Table Text Block]	'
	Troubled Debt Restructurings
	A summary of troubled debt restructurings ("TDRs") by accruing status as of September 30, 2013 were as follows (in thousands):
			As of September 30, 2013																Amounts Charged Off During
			Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended September 30, 2013				Nine Months Ended
			Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2013
	Nonaccruing TDRs:
	Commercial:
	Energy		$	—			$	—			$	—			$	—			$	—			$	—
	Services		3,791				1,274				2,517				250				—				—
	Wholesale/retail		275				141				134				9				—				—
	Manufacturing		396				—				396				—				154				154
	Healthcare		—				—				—				—				—				—
	Integrated food services		—				—				—				—				—				—
	Other commercial and industrial		772				30				742				—				—				—
	Total commercial		5,234				1,445				3,789				259				154				154
	Commercial real estate:
	Construction and land development		10,673				1,776				8,897				148				—				54
	Retail		6,030				2,032				3,998				—				—				627
	Office		5,448				1,294				4,154				—				—				77
	Multifamily		980				980				—				—				—				—
	Industrial		—				—				—				—				—				—
	Other real estate loans		8,482				6,874				1,608				—				—				—
	Total commercial real estate		31,613				12,956				18,657				148				—				758
	Residential mortgage:
	Permanent mortgage		17,319				9,579				7,740				13				73				450
	Home equity		3,782				3,219				563				—				61				127
	Total residential mortgage		21,101				12,798				8,303				13				134				577
	Consumer:
	Indirect automobile		817				737				80				—				—				1
	Other consumer		471				287				184				—				2				2
	Total consumer		1,288				1,024				264				—				2				3
	Total nonaccruing TDRs		$	59,236			$	28,223			$	31,013			$	420			$	290			$	1,492
			As of September 30, 2013																Amounts Charged Off During
			Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended September 30, 2013				Nine Months Ended
			Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2013
	Accruing TDRs:
	Residential mortgage:
	Permanent mortgage		—				—				—				—				—				—
	Permanent mortgages guaranteed by U.S. government agencies		50,099				11,975				38,124				—				—				—
	Total residential mortgage		50,099				11,975				38,124				—				—				—
	Total accruing TDRs		50,099				11,975				38,124				—				—				—
	Total TDRs		$	109,335			$	40,198			$	69,137			$	420			$	290			$	1,492
	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
			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
	Manufacturing		—				—				—				—
	Healthcare		64				64				—				—
	Integrated food services		—				—				—				—
	Other commercial and industrial		675				—				675				—
	Total commercial		5,521				3,525				1,996				60
	Commercial real estate:
	Construction and land development		14,898				9,989				4,909				76
	Retail		6,785				5,735				1,050				—
	Office		3,899				1,920				1,979				—
	Multifamily		—				—				—				—
	Industrial		—				—				—				—
Other real estate loans		5,017				3,399				1,618				—
Total commercial real estate		30,599				21,043				9,556				76
Residential mortgage:
Permanent mortgage		20,490				12,214				8,276				54
Home equity		—				—				—				—
Total residential mortgage		20,490				12,214				8,276				54
Consumer:
Indirect automobile		532				492				40				—
Other consumer		2,328				2,097				231				83
Total consumer		2,860				2,589				271				83
Total nonaccuring TDRs		$	59,470			$	39,371			$	20,099			$	273
		As of
		December 31, 2012
		Recorded				Performing in Accordance With Modified Terms				Not				Specific
		Investment								Performing in Accordance With Modified Terms				Allowance
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
A summary of troubled debt restructurings by accruing status as of September 30, 2012 were as follows (in thousands):
		As of September 30, 2012																Amounts Charged Off During
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended Sept. 30, 2012				Nine Months Ended
		Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2012
Nonaccruing TDRs:
Commercial:
Energy		$	—			$	—			$	—			$	—			$	—			$	—
Services		2,594				2,109				485				—				—				—
Wholesale/retail		1,557				1,385				172				18				—				—
Manufacturing		—				—				—				—				—				—
Healthcare		72				72				—				—				—				—
Integrated food services		—				—				—				—				—				—
Other commercial and industrial		678				—				678				—				—				—
Total commercial		4,901				3,566				1,335				18				—				—
Commercial real estate:
Construction and land development		18,406				9,842				8,564				76				982				3,252
Retail		3,448				3,448				—				—				150				150
Office		3,376				1,368				2,008				—				—				269
Multifamily		—				—				—				—				—				—
Industrial		—				—				—				—				—				—
Other real estate loans		5,310				3,574				1,736				55				87				2,269
Total commercial real estate		30,540				18,232				12,308				131				1,219				5,940
Residential mortgage:
Permanent mortgage		6,925				4,245				2,680				54				—				24
Home equity		—				—				—				—				—				—
Total residential mortgage		6,925				4,245				2,680				54				—				24
Consumer:
Indirect automobile		—				—				—				—				—				—
Other consumer		2,213				443				1,770				88				1,345				1,345
Total consumer		2,213				443				1,770				88				1,345				1,345
Total nonaccruing TDRs		$	44,579			$	26,486			$	18,093			$	291			$	2,564			$	7,309
		As of September 30, 2012																Amounts Charged Off During
		Recorded				Performing in Accordance With Modified Terms				Not				Specific				Three Months Ended Sept. 30, 2012				Nine Months Ended
		Investment								Performing in Accordance With Modified Terms				Allowance								Sept. 30, 2012
Nonaccruing TDRs:
Accruing TDRs:
Residential mortgage:
Permanent mortgage		3,402				2,225				1,177				—				—				83
Permanent mortgages guaranteed by U.S. government agencies		24,590				7,684				16,906				—				—				—
Total residential mortgage		27,992				9,909				18,083				—				—				83
Total accruing TDRs		27,992				9,909				18,083				—				—				83
Total TDRs		$	72,571			$	36,395			$	36,176			$	291			$	2,564			$	7,392
Troubled debt restructurings generally consist of interest rates concessions, payment stream concessions or a combination of concessions to distressed borrowers. The following tables detail the recorded balance of loans at September 30, 2013 by class that were restructured during the three and nine months ended September 30, 2013 by primary type of concession (in thousands):
	Three Months Ended
	Sept. 30, 2013
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				610				228				—				838			838
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				396				—				396			396
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				—				—				—				—			—
Total commercial	—				—				—				610				624				—				1,234			1,234
Commercial real estate:
Construction and land development	—				—				—				—				—				—				—			—
Retail	—				—				—				—				498				—				498			498
Office	—				—				—				—				—				—				—			—
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				—				—				—			—
Total commercial real estate	—				—				—				—				498				—				498			498
Residential mortgage:
Permanent mortgage	—				—				—				—				—				222				222			222
Permanent mortgage guaranteed by U.S. government agencies	1,971				2,892				4,863				—				—				—				—			4,863
Home equity	—				—				—				—				—				515				515			515
Total residential mortgage	1,971				2,892				4,863				—				—				737				737			5,600
Consumer:
Indirect automobile	—				—				—				—				—				58				58			58
Other consumer	—				—				—				—				—				58				58			58
Total consumer	—				—				—				—				—				116				116			116
Total	$	1,971			$	2,892			$	4,863			$	610			$	1,122			$	853			$	2,585		$	7,448
	Nine Months Ended
	30-Sep-13
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				610				1,351				—				1,961			1,961
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				396				—				396			396
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				145				—				—				145			145
Total commercial	—				—				—				755				1,747				—				2,502			2,502
Commercial real estate:
Construction and land development	—				—				—				—				—				—				—			—
Retail	—				—				—				—				1,110				—				1,110			1,110
Office	—				—				—				—				3,173				—				3,173			3,173
Multifamily	—				—				—				—				980				—				980			980
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				3,870				—				3,870			3,870
Total commercial real estate	—				—				—				—				9,133				—				9,133			9,133
Residential mortgage:
Permanent mortgage	—				—				—				—				132				864				996			996
Permanent mortgage guaranteed by U.S. government agencies	9,817				9,589				19,406				—				—				—				—			19,406
Home equity	—				—				—				—				—				2,490				2,490			2,490
Total residential mortgage	9,817				9,589				19,406				—				132				3,354				3,486			22,892
Consumer:
Indirect automobile	—				—				—				—				—				633				633			633
Other consumer	—				—				—				81				—				130				211			211
Total consumer	—				—				—				81				—				763				844			844
Total	$	9,817			$	9,589			$	19,406			$	836			$	11,012			$	4,117			$	15,965		$	35,371
Troubled debt restructurings generally consist of interest rates concessions, payment stream concessions or a combination of concessions to distressed borrowers. The following tables detail the recorded balance of loans by class that were restructured during the three and nine months ended September 30, 2012 by primary type of concession (in thousands):
	Three Months Ended
	Sept. 30, 2012
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				875				—				—				875			875
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				—				—				—			—
Healthcare	—				—				—				—				—				—				—			—
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				—				—				—				—			—
Total commercial	—				—				—				875				—				—				875			875
Commercial real estate:
Construction and land development	—				—				—				—				6,598				—				6,598			6,598
Retail	—				—				—				—				—				—				—			—
Office	—				—				—				—				—				—				—			—
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				—				—				—			—
Total commercial real estate	—				—				—				—				6,598				—				6,598			6,598
Residential mortgage:
Permanent mortgage	—				—				—				—				—				—				—			—
Permanent mortgage guaranteed by U.S. government agencies	—				961				961				—				—				—				—			961
Home equity	—				—				—				—				—				—				—			—
Total residential mortgage	—				961				961				—				—				—				—			961
Consumer:
Indirect automobile	—				—				—				—				—				—				—			—
Other consumer	—				—				—				87				—				—				87			87
Total consumer	—				—				—				87				—				—				87			87
Total	$	—			$	961			$	961			$	962			$	6,598			$	—			$	7,560		$	8,521
	Nine Months Ended
	30-Sep-12
	Accruing												Nonaccrual															Total
	Payment Stream				Combination & Other				Total				Interest Rate				Payment Stream				Combination & Other				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—			$	—		$	—
Services	—				—				—				875				70				—				945			945
Wholesale/retail	—				—				—				—				—				—				—			—
Manufacturing	—				—				—				—				—				—				—			—
Healthcare	—				—				—				—				—				72				72			72
Integrated food services	—				—				—				—				—				—				—			—
Other commercial and industrial	—				—				—				—				—				—				—			—
Total commercial	—				—				—				875				70				72				1,017			1,017
Commercial real estate:
Construction and land development	—				—				—				1,280				6,598				—				7,878			7,878
Retail	—				—				—				2,398				—				—				2,398			2,398
Office	—				—				—				1,368				—				—				1,368			1,368
Multifamily	—				—				—				—				—				—				—			—
Industrial	—				—				—				—				—				—				—			—
Other real estate loans	—				—				—				—				1,605				—				1,605			1,605
Total commercial real estate	—				—				—				5,046				8,203				—				13,249			13,249
Residential mortgage:
Permanent mortgage	—				151				151				—				—				781				781			932
Permanent mortgage guaranteed by U.S. government agencies	—				4,465				4,465				—				—				—				—			4,465
Home equity	—				—				—				—				—				—				—			—
Total residential mortgage	—				4,616				4,616				—				—				781				781			5,397
Consumer:
Indirect automobile	—				—				—				—				—				—				—			—
Other consumer	—				—				—				452				—				1,630				2,082			2,082
Total consumer	—				—				—				452				—				1,630				2,082			2,082
Total	$	—			$	4,616			$	4,616			$	6,373			$	8,273			$	2,483			$	17,129		$	21,745
The following table summarizes, by loan class, the recorded investment at September 30, 2013 of loans modified as TDRs within the previous 12 months and for which there was a payment default during the three and nine months ended September 30, 2013 (in thousands):
	Three Months Ended												Nine Months Ended
	Sept. 30, 2013												Sept. 30, 2013
	Accruing				Nonaccrual				Total				Accruing				Nonaccrual				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				1,338				1,338				—				1,948				1,948
Wholesale/retail	—				—				—				—				—				—
Manufacturing	—				396				396				—				396				396
Healthcare	—				—				—				—				—				—
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				145				145				—				168				168
Total commercial	—				1,879				1,879				—				2,512				2,512
Commercial real estate:
Construction and land development	—				257				257				—				257				257
Retail	—				1,110				1,110				—				1,110				1,110
Office	—				3,173				3,173				—				3,173				3,173
Multifamily	—				—				—				—				980				980
Industrial	—				—				—				—				—				—
Other real estate loans	—				—				—				—				3,870				3,870
Total commercial real estate	—				4,540				4,540				—				9,390				9,390
Residential mortgage:
Permanent mortgage	—				820				820				—				941				941
Permanent mortgage guaranteed by U.S. government agencies	22,359				—				22,359				26,636				—				26,636
Home equity	—				563				563				—				630				630
Total residential mortgage	22,359				1,383				23,742				26,636				1,571				28,207
Consumer:
Indirect automobile	—				81				81				—				116				116
Other consumer	—				53				53				—				53				53
Total consumer	—				134				134				—				169				169
Total	$	22,359			$	7,936			$	30,295			$	26,636			$	13,642			$	40,278
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.
The following table summarizes, by loan class, the recorded investment at September 30, 2012 of loans modified as TDRs within the previous 12 months and for which there was a payment default during the three and nine months ended September 30, 2012 (in thousands):
	Three Months Ended												Nine Months Ended
	Sept. 30, 2012												Sept. 30, 2012
	Accruing				Nonaccrual				Total				Accruing				Nonaccrual				Total
Commercial:
Energy	$	—			$	—			$	—			$	—			$	—			$	—
Services	—				70				70				—				70				70
Wholesale/retail	—				—				—				—				—				—
Manufacturing	—				—				—				—				—				—
Healthcare	—				—				—				—				—				—
Integrated food services	—				—				—				—				—				—
Other commercial and industrial	—				—				—				—				—				—
Total commercial	—				70				70				—				70				70
Commercial real estate:
Construction and land development	—				1,183				1,183				—				1,183				1,183
Retail	—				—				—				—				2,398				2,398
Office	—				—				—				—				1,368				1,368
Multifamily	—				—				—				—				—				—
Industrial	—				—				—				—				—				—
Other real estate loans	—				—				—				—				—				—
Total commercial real estate	—				1,183				1,183				—				4,949				4,949
Residential mortgage:
Permanent mortgage	151				—				151				151				—				151
Permanent mortgage guaranteed by U.S. government agencies	3,946				—				3,946				4,635				—				4,635
Home equity	—				—				—				—				—				—
Total residential mortgage	4,097				—				4,097				4,786				—				4,786
Consumer:
Indirect automobile	—				—				—				—				—				—
Other consumer	—				1,770				1,770				—				1,770				1,770
Total consumer	—				1,770				1,770				—				1,770				1,770
Total	$	4,097			$	3,023			$	7,120			$	4,786			$	6,789			$	11,575
Summary of Loans by Aging Status [Table Text Block]	'
	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 September 30, 2013 is as follows (in thousands):
							Past Due
			Current				30 to 89				90 Days				Nonaccrual				Total
							Days				or More
	Commercial:
	Energy		$	2,308,639			$	1,399			$	—			$	1,953			$	2,311,991
	Services		2,140,835				704				85				6,927				2,148,551
	Wholesale/retail		1,173,628				955				—				7,223				1,181,806
	Manufacturing		381,048				569				—				843				382,460
	Healthcare		1,158,340				139				—				1,733				1,160,212
	Integrated food services		141,440				—				—				—				141,440
	Other commercial and industrial		243,656				116				—				843				244,615
	Total commercial		7,547,586				3,882				85				19,522				7,571,075
	Commercial real estate:
	Construction and land development		195,672				—				—				20,784				216,456
	Retail		548,810				194				—				7,914				556,918
	Office		415,205				—				—				6,838				422,043
	Multifamily		516,104				—				—				4,350				520,454
	Industrial		244,415				607				—				—				245,022
	Other real estate loans		375,250				470				—				12,616				388,336
	Total commercial real estate		2,295,456				1,271				—				52,502				2,349,229
	Residential mortgage:
	Permanent mortgage		1,040,616				6,248				—				31,797				1,078,661
	Permanent mortgages guaranteed by U.S. government agencies		20,985				18,639				123,718				577				163,919
	Home equity		782,954				2,321				28				6,882				792,185
	Total residential mortgage		1,844,555				27,208				123,746				39,256				2,034,765
	Consumer:
	Indirect automobile		9,416				384				—				957				10,757
	Other consumer		382,188				1,344				75				667				384,274
	Total consumer		391,604				1,728				75				1,624				395,031
	Total		$	12,079,201			$	34,089			$	123,906			$	112,904			$	12,350,100
	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:
	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
A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of September 30, 2012 is as follows (in thousands):
						Past Due
		Current				30 to 89				90 Days				Nonaccrual				Total
						Days				or More
Commercial:
Energy		$	2,408,812			$	5,002			$	—			$	3,063			$	2,416,877
Services		1,956,190				741				538				10,099				1,967,568
Wholesale/retail		1,056,730				1,324				—				2,007				1,060,061
Manufacturing		340,243				834				—				2,283				343,360
Healthcare		1,014,771				4,775				—				3,305				1,022,851
Integrated food services		200,453				—				—				—				200,453
Other commercial and industrial		254,167				240				325				1,005				255,737
Total commercial		7,231,366				12,916				863				21,762				7,266,907
Commercial real estate:
Construction and land development		245,258				10,297				35				38,143				293,733
Retail		528,396				368				—				6,692				535,456
Office		403,223				1,190				—				9,833				414,246
Multifamily		389,949				35				—				3,145				393,129
Industrial		177,951				1,831				—				4,064				183,846
Other real estate loans		340,586				2,391				1				13,884				356,862
Total commercial real estate		2,085,363				16,112				36				75,761				2,177,272
Residential mortgage:
Permanent mortgage		1,097,550				17,953				250				23,207				1,138,960
Permanent mortgages guaranteed by U.S. government agencies		19,786				16,629				125,346				510				162,271
Home equity		706,561				2,961				—				5,550				715,072
Total residential mortgage		1,823,897				37,543				125,596				29,267				2,016,303
Consumer:
Indirect automobile		43,588				1,729				32				1,932				47,281
Other consumer		319,549				1,878				—				3,177				324,604
Total consumer		363,137				3,607				32				5,109				371,885
Total		$	11,503,763			$	70,178			$	126,527			$	131,899			$	11,832,367

Mortgage_Banking_Activities_Ta

Mortgage Banking Activities (Tables)	9 Months Ended
	Sep. 30, 2013
Mortgage Banking [Abstract]	'
Components of Residential Mortgage Loans Held For Sale [Table Text Block]	'
			September 30, 2013							December 31, 2012						September 30, 2012
			Unpaid Principal Balance/				Fair Value			Unpaid Principal Balance/			Fair Value			Unpaid			Fair Value
			Notional							Notional						Principal
																Balance/
																Notional
	Residential mortgage loans held for sale		$	220,800			$	228,926		$	269,718		$	281,935		$	294,794		$	313,927
	Residential mortgage loan commitments		351,196				10,948			356,634			12,733			452,129			22,319
	Forward sales contracts		560,069				(9,363		)	598,442			(906		)	722,043			(11,144		)
							$	230,511					$	293,762					$	325,102
Mortgage Banking Revenue [Table Text Block]	'
	Mortgage banking revenue was as follows (in thousands):
			Three Months Ended							Nine Months Ended
			September 30,				September 30,			September 30,			September 30,
			2013				2012			2013			2012
	Originating and marketing revenue:
	Residential mortgages loan held for sale		$	31,047			$	40,463		$	79,045		$	85,262
	Residential mortgage loan commitments		12,668				6,512			(1,774		)	15,722
	Forward sales contracts		(31,167		)		(6,618		)	(8,457		)	(7,856		)
	Total originating and marketing revenue		12,548				40,357			68,814			93,128
	Servicing revenue		10,938				9,909			31,244			29,764
	Total mortgage banking revenue		$	23,486			$	50,266		$	100,058		$	122,892
Summary of Mortgage Servicing Rights [Table Text Block]	'
	The following represents a summary of mortgage servicing rights (Dollars in thousands):
			September 30,				December 31,			September 30,
			2013				2012			2012
	Number of residential mortgage loans serviced for others		104,115				98,246			97,465
	Outstanding principal balance of residential mortgage loans serviced for others		$	13,298,479			$	11,981,624		$	11,756,350
	Weighted average interest rate		4.42		%		4.71		%	4.85		%
	Remaining term (in months)		292				289			289
Activity in Capitalized Mortgage Servicing Rights [Table Text Block]	'
	Activity in capitalized mortgage servicing rights during the three months ended September 30, 2013 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, June 30, 2013		$	15,582			$	117,307		$	132,889
	Additions, net		—				13,225			13,225
	Change in fair value due to loan runoff		(693		)		(4,212		)	(4,905		)
	Change in fair value due to market changes		(76		)		(270		)	(346		)
	Balance, Sept. 30, 2013		$	14,813			$	126,050		$	140,863
	Activity in capitalized mortgage servicing rights during the nine months ended September 30, 2013 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, December 31, 2012		$	12,976			$	87,836		$	100,812
	Additions, net		—				39,157			39,157
	Change in fair value due to loan runoff		(2,504		)		(13,229		)	(15,733		)
	Change in fair value due to market changes		4,341				12,286			16,627
	Balance, Sept. 30, 2013		$	14,813			$	126,050		$	140,863
	Activity in capitalized mortgage servicing rights during the three months ended September 30, 2012 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, June 30, 2012		$	16,361			$	75,422		$	91,783
	Additions, net		—				12,107			12,107
	Change in fair value due to loan runoff		(998		)		(3,663		)	(4,661		)
	Change in fair value due to market changes		(2,648		)		(6,928		)	(9,576		)
	Balance, Sept. 30, 2012		$	12,715			$	76,938		$	89,653
	Activity in capitalized mortgage servicing rights during the nine months ended September 30, 2012 was as follows (in thousands):
			Purchased				Originated			Total
	Balance, December 31, 2011		$	18,903			$	67,880		$	86,783
	Additions, net		—				29,754			29,754
	Change in fair value due to loan runoff		(2,958		)		(10,027		)	(12,985		)
	Change in fair value due to market changes		(3,230		)		(10,669		)	(13,899		)
	Balance, Sept. 30, 2012		$	12,715			$	76,938		$	89,653
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 based on significant unobservable inputs were as follows:
			September 30,		December 31,		September 30,
			2013		2012		2012
	Discount rate – risk-free rate plus a market premium		10.23%		10.29%		10.32%
	Prepayment rate – based upon loan interest rate, original term and loan type		7.03% - 30.92%		8.38% - 43.94%		9.14% - 46.42
	Loan servicing costs – annually per loan based upon loan type:
	Performing loans		$58 - $105		$55 - $105		$55 - $105
	Delinquent loans		$135 - $500		$135 - $500		$135 - $500
	Loans in foreclosure		$875 - $4,250		$875 - $4,250		$875 - $3,750
	Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life		1.54%		0.87%		0.77%
Stratification of Loan Servicing Portfolio [Table Text Block]	'
	Stratification of the residential mortgage loan servicing portfolio and outstanding principal of loans serviced for others by interest rate at September 30, 2013 follows (in thousands):
			< 4.00%				4.00% - 4.99%			5.00% - 5.99%			> 5.99%			Total
	Fair value		$	60,587			$	47,954		$	25,965		$	6,357		$	140,863
	Outstanding principal of loans serviced for others		$	5,367,632			$	4,214,910		$	2,436,350		$	1,279,587		$	13,298,479
	Weighted average prepayment rate1		7.03		%		8.26		%	12.05		%	30.92		%	10.64		%
	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 [Table Text Block]	'
	The aging status of our mortgage loans serviced for others by investor at September 30, 2013 follows (in thousands):
							Past Due
			Current				30 to 59			60 to 89			90 Days or More			Total
							Days			Days
	FHLMC		$	4,603,938			$	38,363		$	9,870		$	35,126		$	4,687,297
	FNMA		3,787,198				22,249			5,441			20,040			3,834,928
	GNMA		4,381,908				127,465			36,463			14,793			4,560,629
	Other		208,047				1,588			18			5,972			215,625
	Total		$	12,981,091			$	189,665		$	51,792		$	75,931		$	13,298,479
Activity in Allowance for Losses On Loans Sold With Recourse [Table Text Block]	'
			Three Months Ended							Nine Months Ended
			September 30,							September 30,
			2013				2012			2013			2012
	Beginning balance		$	9,665			$	17,832		$	11,359		$	18,683
	Provision for recourse losses		601				1,055			270			3,495
	Loans charged off, net		(981		)		(1,255		)	(2,344		)	(4,546		)
	Ending balance		$	9,285			$	17,632		$	9,285		$	17,632
Summary of Unresolved Deficiency Requests and Related Accrual for Credit Losses [Table Text Block]	'
	A summary of unresolved deficiency requests from the agencies and related accrual for credit losses follows (in thousands, except for number of unresolved deficiency requests):
		September 30,				December 31,
		2013				2012
	Number of unresolved deficiency requests	524				389
	Aggregate outstanding principal balance subject to unresolved deficiency requests	$	64,428			$	44,831
	Unpaid principal balance subject to indemnification by the Company	2,440				1,233
	Accrual for credit losses related to potential loan repurchases under representations and warranties	7,903				5,291

Commitments_and_Contingent_Lia1

Commitments and Contingent Liabilities Commitments and Contingent Liabilities - Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments and Contingencies Disclosure [Abstract]	'
Schedule of Variable Interest Entities [Table Text Block]	'
	A summary of consolidated and unconsolidated alternative investments as of September 30, 2013, December 31, 2012 and September 30, 2012 is as follows (in thousands):
		September 30, 2013
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	27,799	$	—	$	—	$	23,710
	Tax credit entities	10,000		13,577		—		10,964		10,000
	Other	—		9,510		—		—		2,020
	Total consolidated	$	10,000	$	50,886	$	—	$	10,964	$	35,730
	Unconsolidated:
	Tax credit entities	$	30,345	$	92,039	$	44,285	$	—	$	—
	Other	—		9,596		1,698		—		—
	Total unconsolidated	$	30,345	$	101,635	$	45,983	$	—	$	—
		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	$	—	$	—
		September 30, 2012
		Loans		Other		Other		Other		Non-controlling
				assets		liabilities		borrowings		interest
	Consolidated:
	Private equity funds	$	—	$	28,792	$	—	$	—	$	24,777
	Tax credit entities	10,000		14,094		—		10,964		10,000
	Other	—		9,024		—		—		2,041
	Total consolidated	$	10,000	$	51,910	$	—	$	10,964	$	36,818
	Unconsolidated:
	Tax credit entities	$	17,486	$	69,717	$	36,433	$	—	$	—
	Other	—		9,902		2,062		—		—
	Total unconsolidated	$	17,486	$	79,619	$	38,495	$	—	$	—

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Stockholders' Equity Note [Abstract]	'
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, 2011		$	135,740		$	6,673		$	(12,742	)	$	(692	)	$	128,979
	Net change in unrealized gain (loss)		86,390			—			(292		)	—			86,098
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(5,430		)	—			—			(5,430		)
	Interest expense, Subordinated debentures		—			—			—			399			399
	Net impairment losses recognized in earnings		5,684			—			—			—			5,684
	Gain on available for sale securities, net		(32,779		)	—			—			—			(32,779		)
	Other comprehensive income (loss), before income taxes		59,295			(5,430		)	(292		)	399			53,972
	Income tax benefit (expense)1		(23,066		)	2,550			113			(155		)	(20,558		)
	Other comprehensive income (loss), net of income taxes		36,229			(2,880		)	(179		)	244			33,414
	Balance, Sept. 30, 2012		$	171,969		$	3,793		$	(12,921	)	$	(448	)	$	162,393
	Balance, December 31, 2012		$	155,553		$	3,078		$	(8,296	)	$	(415	)	$	149,920
	Net change in unrealized gains (losses)		(240,384		)	—			—			—			(240,384		)
	Reclassification adjustments included in earnings:
	Interest revenue, Investment securities, Taxable securities		—			(2,717		)	—			—			(2,717		)
	Interest expense, Subordinated debentures		—			—			—			209			209
	Net impairment losses recognized in earnings		2,308			—			—			—			2,308
	Gain on available for sale securities, net		(9,086		)	—			—			—			(9,086		)
	Other comprehensive income (loss), before income taxes		(247,162		)	(2,717		)	—			209			(249,670		)
	Income tax benefit (expense)1		96,146			1,059			—			(81		)	97,124
	Other comprehensive income (loss), net of income taxes		(151,016		)	(1,658		)	—			128			(152,546		)
	Balance, Sept. 30, 2013		$	4,537		$	1,420		$	(8,296	)	$	(287	)	$	(2,626	)
	1	Calculated using a 39% effective tax rate.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Table Text Block]	'
	(In thousands, except share and per share amounts)	Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Numerator:
	Net income attributable to BOK Financial Corp. shareholders	$	75,738	$	87,382	$	243,633	$	268,626
	Less: Earnings allocated to participating securities	799		278		2,623		1,994
	Numerator for basic earnings per share – income available to common shareholders	74,939		87,104		241,010		266,632
	Effect of reallocating undistributed earnings of participating securities	2		1		6		6
	Numerator for diluted earnings per share – income available to common shareholders	$	74,941	$	87,105	$	241,016	$	266,638
	Denominator:
	Weighted average shares outstanding	68,770,950		68,183,171		68,687,609		68,204,078
	Less:  Participating securities included in weighted average shares outstanding	721,771		216,471		734,356		499,735
	Denominator for basic earnings per common share	68,049,179		67,966,700		67,953,253		67,704,343
	Dilutive effect of employee stock compensation plans1	223,682		368,289		222,662		277,215
	Denominator for diluted earnings per common share	68,272,861		68,334,989		68,175,915		67,981,558
	Basic earnings per share	$	1.1	$	1.28	$	3.55	$	3.94
	Diluted earnings per share	$	1.1	$	1.27	$	3.54	$	3.92
	1  Excludes employee stock options with exercise prices greater than current market price.	—		87,749		—		270,288

Reportable_Segments_Tables

Reportable Segments (Tables)	9 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Reportable Segments [Table Text Block]	'
	Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	91,540		$	25,131		$	6,300		$	43,380		$	166,351
	Net interest revenue (expense) from internal sources	(9,405		)	5,060			$	4,837		(492		)	—
	Net interest revenue	82,135			30,191			11,137			42,888			166,351
	Provision for credit losses	(1,326		)	1,331			255			(8,760		)	(8,500		)
	Net interest revenue after provision for credit losses	83,461			28,860			10,882			51,648			174,851
	Other operating revenue	42,509			46,932			55,601			274			145,316
	Other operating expense	60,969			56,431			59,993			33,251			210,644
	Net income before taxes	65,001			19,361			6,490			18,671			109,523
	Federal and state income taxes	25,285			7,531			2,525			(1,880		)	33,461
	Net income	39,716			11,830			3,965			20,551			76,062
	Net loss attributable to non-controlling interest	—			—			—			324			324
	Net income attributable to BOK Financial Corp. shareholders	$	39,716		$	11,830		$	3,965		$	20,227		$	75,738
	Average assets	$	10,460,986		$	5,655,914		$	4,385,941		$	6,751,891		$	27,254,732
	Average invested capital	911,229			293,716			206,872			1,553,106			2,964,923
	Performance measurements:
	Return on average assets	1.51		%	0.83		%	0.36		%				1.1		%
	Return on average invested capital	17.29		%	15.98		%	7.62		%				10.13		%
	Efficiency ratio	48.92		%	71.53		%	89.99		%				66.03		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2013 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	272,889		$	74,056		$	19,373		$	137,594		$	503,912
	Net interest revenue (expense) from internal sources	(27,907		)	15,711			$	15,209		(3,013		)	—
	Net interest revenue	244,982			89,767			34,582			134,581			503,912
	Provision for credit losses	(219		)	3,663			1,704			(21,648		)	(16,500		)
	Net interest revenue after provision for credit losses	245,201			86,104			32,878			156,229			520,412
	Other operating revenue	127,352			152,066			163,368			12,365			455,151
	Other operating expense	179,795			152,122			178,694			97,963			608,574
	Net income before taxes	192,758			86,048			17,552			70,631			366,989
	Federal and state income taxes	74,983			33,473			6,828			6,696			121,980
	Net income	117,775			52,575			10,724			63,935			245,009
	Net income attributable to non-controlling interest	—			—			—			1,376			1,376
	Net income attributable to BOK Financial Corp. shareholders	$	117,775		$	52,575		$	10,724		$	62,559		$	243,633
	Average assets	$	10,470,800		$	5,691,406		$	4,537,922		$	6,774,754		$	27,474,882
	Average invested capital	900,789			295,394			204,592			1,595,910			2,996,685
	Performance measurements:
	Return on average assets	1.5		%	1.24		%	0.32		%				1.19		%
	Return on average invested capital	17.48		%	23.8		%	7		%				10.87		%
	Efficiency ratio	48.3		%	64.28		%	90.57		%				63.35		%
	Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended September 30, 2012 is as follows (in thousands):
		Commercial			Consumer			Wealth			Funds Management and Other			BOK
								Management						Financial
														Consolidated
	Net interest revenue from external sources	$	91,381		$	24,862		$	7,064		$	52,720		$	176,027
	Net interest revenue (expense) from internal sources	(11,002		)	5,410			5,452			140			—
	Net interest revenue	80,379			30,272			12,516			52,860			176,027
	Provision for credit losses	3,253			338			509			(4,100		)	—
	Net interest revenue after provision for credit losses	77,126			29,934			12,007			56,960			176,027
	Other operating revenue	40,091			80,640			50,156			9,057			179,944
	Other operating expense	62,633			74,486			53,917			31,304			222,340
	Net income before taxes	54,584			36,088			8,246			34,713			133,631
	Federal and state income taxes	21,233			14,038			3,208			7,299			45,778
	Net income	33,351			22,050			5,038			27,414			87,853
	Net loss attributable to non-controlling interest	—			—			—			471			471
	Net income attributable to BOK Financial Corp. shareholders	$	33,351		$	22,050		$	5,038		$	26,943		$	87,382
	Average assets	$	10,065,208		$	5,671,356		$	4,273,386		$	6,578,222		$	26,588,172
	Average invested capital	865,157			292,280			188,755			1,601,000			2,947,192
	Performance measurements:
Return on average assets	1.32		%	1.55		%	0.47		%				1.31		%
Return on average invested capital	15.34		%	30.01		%	10.59		%				11.8		%
Efficiency ratio	51.99		%	61.11		%	86.27		%				61.18		%
Reportable segments reconciliation to the Consolidated Financial Statements for the nine months ended September 30, 2012 is as follows (in thousands):
	Commercial			Consumer			Wealth			Funds Management and Other			BOK
							Management						Financial
													Consolidated
Net interest revenue from external sources	$	274,423		$	77,173		$	21,340		$	158,021		$	530,957
Net interest revenue (expense) from internal sources	(34,491		)	15,093			15,503			3,895			—
Net interest revenue	239,932			92,266			36,843			161,916			530,957
Provision for credit losses	10,393			5,991			1,680			(26,064		)	(8,000		)
Net interest revenue after provision for credit losses	229,539			86,275			35,163			187,980			538,957
Other operating revenue	131,042			205,400			148,105			18,938			503,485
Other operating expense	181,119			197,399			158,505			90,464			627,487
Net income before taxes	179,462			94,276			24,763			116,454			414,955
Federal and state income taxes	69,811			36,673			9,633			28,330			144,447
Net income	109,651			57,603			15,130			88,124			270,508
Net income attributable to non-controlling interest	—			—			—			1,882			1,882
Net income attributable to BOK Financial Corp. shareholders	$	109,651		$	57,603		$	15,130		$	86,242		$	268,626
Average assets	$	9,981,793		$	5,705,411		$	4,202,977		$	5,993,489		$	25,883,670
Average invested capital	880,777			287,888			179,772			1,535,515			2,883,952
Performance measurements:
Return on average assets	1.47		%	1.35		%	0.48		%				1.39		%
Return on average invested capital	16.63		%	26.73		%	11.25		%				12.44		%
Efficiency ratio	50.8		%	63.62		%	85.91		%				60.68		%

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 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		$	74,632			$	—			$	74,632			$	—
	U.S. agency residential mortgage-backed securities		26,129				—				26,129				—
	Municipal and other tax-exempt securities		37,057				—				37,057				—
	Other trading securities		13,069				—				13,069				—
	Total trading securities		150,887				—				150,887				—
	Available for sale securities:
	U.S. Treasury		1,052				1,052				—				—
	Municipal and other tax-exempt		95,440				—				55,769				39,671
	U.S. agency residential mortgage-backed securities		7,981,387				—				7,981,387				—
	Privately issued residential mortgage-backed securities		230,900				—				230,900				—
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,946,295				—				1,946,295				—
	Other debt securities		35,362				—				30,650				4,712
	Perpetual preferred stock		23,680				—				23,680				—
	Equity securities and mutual funds		58,787				—				54,580				4,207
	Total available for sale securities		10,372,903				1,052				10,323,261				48,590
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		163,567				—				163,567				—
	Other securities		4,293				—				4,293				—
	Total fair value option securities		167,860				—				167,860				—
	Residential mortgage loans held for sale		230,511				—				230,511				—
	Mortgage servicing rights1		140,863				—				—				140,863
	Derivative contracts, net of cash margin2		377,325				644				376,681				—
	Other assets – private equity funds		27,799				—				—				27,799
	Liabilities:
	Derivative contracts, net of cash margin2		232,544				—				232,544				—
	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 5, 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 contacts, 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 rights1		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 5, 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 contacts, net of cash margin.
The fair value of financial assets and liabilities that are measured on a recurring basis are as follows as of September 30, 2012 (in thousands):
		Total				Quoted Prices in				Significant Other Observable Inputs				Significant Unobservable Inputs
						Active Markets for Identical Instruments
Assets:
Trading securities:
U.S. Government agency debentures		$	3,100			$	—			$	3,100			$	—
U.S. agency residential mortgage-backed securities		119,835				—				119,835				—
Municipal and other tax-exempt securities		58,150				—				58,150				—
Other trading securities		23,157				—				23,157				—
Total trading securities		204,242				—				204,242				—
Available for sale securities:
U.S. Treasury		1,002				1,002				—				—
Municipal and other tax-exempt		87,969				—				46,690				41,279
U.S. agency residential mortgage-backed securities		10,654,821				—				10,654,821				—
Privately issued residential mortgage-backed securities		331,722				—				331,722				—
Commercial mortgage-backed securities guaranteed by U.S. government agencies		339,095				—				339,095				—
Other debt securities		36,456				—				31,056				5,400
Perpetual preferred stock		25,288				—				25,288				—
Equity securities and mutual funds		30,081				6,912				23,169				—
Total available for sale securities		11,506,434				7,914				11,451,841				46,679
Fair value option securities:
U.S. agency residential mortgage-backed securities		305,445				—				305,445				—
Corporate debt securities		26,442				—				26,442				—
Total fair value option securities		331,887				—				331,887				—
Residential mortgage loans held for sale		325,102				—				325,102				—
Mortgage servicing rights1		89,653				—				—				89,653
Derivative contracts, net of cash margin 2		472,783				8,301				464,482				—
Other assets – private equity funds		28,792				—				—				28,792
Liabilities:
Derivative contracts, net of cash margin 2		435,497				—				435,497				—
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 5, 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 contacts, net of cash margin.
Fair Value Assets Measured On Recurring Basis, Significant Unobservable Inputs [Table Text Block]	'
	The following represents the changes for the three months ended September 30, 2013 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
			Available for Sale Securities
			Municipal and other tax-exempt				Other debt securities				Equity securities and mutual funds				Other assets – private equity funds
	Balance, June 30, 2013		$	38,847			$	5,193			$	2,247			$	28,379
	Purchases and capital calls		—				—				—				567
	Redemptions and distributions		—				(500		)		—				(1,589		)
	Gain (loss) recognized in earnings:
	Gain on other assets, net		—				—				—				442
	Gain on available for sale securities, net		—				—				—				—
	Other-than-temporary impairment losses		(1,369		)		—				—				—
	Other comprehensive gain (loss)		2,193				19				1,960				—
	Balance, Sept. 30, 2013		$	39,671			$	4,712			$	4,207			$	27,799
	The following represents the changes for the nine months ended September 30, 2013 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
			Available for Sale Securities
			Municipal and other tax-exempt				Other debt securities				Equity securities and mutual funds				Other assets – private equity funds
	Balance, Dec. 31, 2012		$	40,702			$	5,399			$	2,161			$	28,169
	Purchases and capital calls		—				—				—				1,207
	Redemptions and distributions		(98		)		(500		)		—				(3,424		)
	Gain (loss) recognized in earnings:
	Gain on other assets, net		—				—				—				1,847
	Gain on available for sale securities, net		—				—				—				—
	Other-than-temporary impairment losses		(1,369		)		—				—				—
	Other comprehensive gain (loss)		436				(187		)		2,046				—
	Balance, Sept. 30, 2013		$	39,671			$	4,712			$	4,207			$	27,799
	The following represents the changes for the three months ended September 30, 2012 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
			Available for Sale Securities
			Municipal and other tax-exempt				Other debt securities				Other assets – private equity funds
	Balance, June 30, 2012		$	41,662			$	5,388			$	31,492
	Purchases, and capital calls		—				—				476
	Redemptions and distributions		1				—				(3,906		)
	Gain (loss) recognized in earnings
	Gain on other assets, net		—				—				730
	Gain on available for sale securities, net		—				—				—
	Other-than-temporary impairment losses		—				—				—
	Other comprehensive (loss)		(384		)		12				—
	Balance, Sept. 30, 2012		$	41,279			$	5,400			$	28,792
	The following represents the changes for the nine months ended September 30, 2012 related to assets measured at fair value on a recurring basis using significant unobservable inputs (in thousands):
			Available for Sale Securities
			Municipal and other tax-exempt				Other debt securities				Other assets – private equity funds
	Balance, Dec. 31, 2011		$	42,353			$	5,900			$	30,902
	Purchases, and capital calls		—				—				2,385
	Redemptions and distributions		(462		)		(500		)		(7,072		)
	Gain (loss) recognized in earnings
	Gain on other assets, net		—				—				2,577
	Gain on available for sale securities, net		1				—				—
	Other-than-temporary impairment losses		—				—				—
	Other comprehensive (loss)		(613		)		—				—
	Balance, Sept. 30, 2012		$	41,279			$	5,400			$	28,792
Fair Value Inputs, Fair Value Measured On a Recurring Basis, 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 September 30, 2013 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		$	21,545			$	21,467			$	20,531			Discounted cash flows	1	Interest rate spread		4.98%-5.28% (5.15%)	2
																			95.02%-95.55% (95.29%)	3
	Below investment grade		23,925				17,924				19,140				Proposed settlement agreement	4	Discount for settlement uncertainty
																			80.00% (80.00%)	3
	Total municipal and other tax-exempt securities		45,470				39,391				39,671
	Other debt securities		4,900				4,900				4,712				Discounted cash flows	1	Interest rate spread		5.60%-5.68% (5.67%)	5
																			96.16%-96.16% (96.16%)	3
	Equity securities and mutual funds		N/A				2,420				4,207				Publicly announced preliminary purchase price information from acquirer.		Discount for settlement uncertainty		N/A	7
	Other assets - private equity funds		N/A				N/A				27,799				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 462 to 517 basis points over average yields for comparable tax-exempt securities.
	3	Represents fair value as a percentage of par value
	4	Fair value based on proposed settlement agreement between bond holders and issuer.
	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 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 September 30, 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 $199 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 $45 thousand. For municipal and other tax-exempt securities rated below investment grade by at least one of the nationally-recognized rating agencies, a 100 basis point increase in the spread over average yields for comparable securities would significant change the fair value of these securities.
	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 mutual funds		N/A				2,161				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 Recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 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		$	29,100			$	28,999			$	28,848			Discounted cash flows	1	Interest rate spread		1.00%-1.50% (1.25%)	2
																			98.85%-99.47% (99.13%)	3
	Below investment grade		17,000				13,396				12,431				Discounted cash flows	1	Interest rate spread		7.20%-9.88% (7.77%)	4
																			73.06%-73.30% (73.13%)	3
	Total municipal and other tax-exempt securities		46,100				42,395				41,279
	Other debt securities		5,400				5,400				5,400				Discounted cash flows	1	Interest rate spread		1.70%-1.73% (1.71%)	5
																			100.00%-100.00% (100.00%)	3
	Other assets - private equity funds		N/A				N/A				28,792				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.
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) during the period. The carrying value represents only those assets with a balance at September 30, 2013 for which the fair value was adjusted during the nine months ended September 30, 2013:
														Fair Value Adjustments for the
		Carrying Value at September 30, 2013												Three Months Ended September 30, 2013 Recognized in:							Nine Months Ended September 30, 2013 Recognized in:
		Quoted Prices				Significant				Significant				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net			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	$	—			$	10,607			$	4,787			$	660			$	—		$	6,900	$	—
	Real estate and other repossessed assets	—				14,901				170				—				1,767			—		2,560
	The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at September 30, 2012 for which the fair value was adjusted during the nine months ended September 30, 2012:
														Fair Value Adjustments for the
		Carrying Value at September 30, 2012												Three Months Ended September 30, 2012 Recognized in:							Nine Months Ended September 30, 2012 Recognized in:
		Quoted Prices				Significant				Significant				Gross charge-offs against allowance for loan losses				Net losses and expenses of repossessed assets, net			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	$	—			$	25,521			$	1,655			$	3,915			$	—		$	10,797	$	—
	Real estate and other repossessed assets	—				38,386				6,617				—				4,398			—		11,068
Fair Value Inputs, Fair Value Measured On a Nonrecurring Basis, Quantitative Information [Table Text Block]	'
	A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 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		$	4,787			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
	Real estate and other repossessed assets		170				Listing value, less cost to sell		Marketability adjustments off appraised value		82%-85% (83%)1
	1	Marketability adjustments include consideration of estimated costs to sell which is approximately 15% of fair value.
	A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of September 30, 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		$	1,655			Appraised value, as adjusted		Broker quotes and management's knowledge of industry and collateral.		N/A
	Real estate and other repossessed assets		6,617				Listing value, less cost to sell		Marketability adjustments off appraised value		68%-100% (85%)1
	1	Marketability adjustments include consideration of estimated costs to sell which is approximately 15% of fair value. In addition, $796 thousand of real estate and other repossessed assets at September 30, 2012 are based on expert opinions or management's knowledge of the collateral or industry and do not have and independently appraised value.
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 basis as of September 30, 2013 (dollars in thousands):
			Carrying				Range of		Average			Discount			Estimated
			Value				Contractual		Re-pricing			Rate			Fair
							Yields		(in years)						Value
	Cash and cash equivalents		$	1,133,771											$	1,133,771
	Trading securities:
	U.S. Government agency debentures		74,632												74,632
	U.S. agency residential mortgage-backed securities		26,129												26,129
	Municipal and other tax-exempt securities		37,057												37,057
	Other trading securities		13,069												13,069
	Total trading securities		150,887												150,887
	Investment securities:
	Municipal and other tax-exempt		409,542												407,562
	U.S. agency residential mortgage-backed securities		56,182												58,442
	Other debt securities		178,501												188,475
	Total investment securities		644,225												654,479
	Available for sale securities:
	U.S. Treasury		1,052												1,052
	Municipal and other tax-exempt		95,440												95,440
	U.S. agency residential mortgage-backed securities		7,981,387												7,981,387
	Privately issued residential mortgage-backed securities		230,900												230,900
	Commercial mortgage-backed securities guaranteed by U.S. government agencies		1,946,295												1,946,295
	Other debt securities		35,362												35,362
	Perpetual preferred stock		23,680												23,680
	Equity securities and mutual funds		58,787												58,787
	Total available for sale securities		10,372,903												10,372,903
	Fair value option securities:
	U.S. agency residential mortgage-backed securities		163,567												163,567
	Other securities		4,293												4,293
	Total fair value option securities		167,860												167,860
	Residential mortgage loans held for sale		230,511												230,511
	Loans:
	Commercial		7,571,075				0.25% - 30.00%		0.46			0.50% - 4.19%			7,493,143
	Commercial real estate		2,349,229				0.38% - 18.00%		0.79			1.20% - 3.42%			2,326,908
	Residential mortgage		2,034,765				0.38% - 18.00%		2.56			0.64% - 4.40%			2,056,072
	Consumer		395,031				0.38% - 21.00%		0.55			1.24% - 3.71%			388,490
	Total loans		12,350,100												12,264,613
	Allowance for loan losses		(194,325		)										—
	Net loans		12,155,775												12,264,613
	Mortgage servicing rights		140,863												140,863
	Derivative instruments with positive fair value, net of cash margin		377,325												377,325
	Other assets – private equity funds		27,799												27,799
	Deposits with no stated maturity		16,771,635												16,771,635
	Time deposits		2,720,020				0.01% - 9.64%		2.08			0.75% - 1.28%			2,739,764
	Other borrowed funds		3,611,944				0.25% - 4.78%		—			0.06% - 2.65%			3,570,228
	Subordinated debentures		347,758				0.95% - 5.00%		2.87			2.22	%		344,854
	Derivative instruments with negative fair value, net of cash margin		232,544												232,544
	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 basis as of December 31, 2012 (dollars in thousands):
			Carrying				Range of		Average			Discount			Estimated
			Value				Contractual		Re-pricing			Rate			Fair
							Yields		(in years)						Value
	Cash and cash equivalents		$	1,286,239											$	1,286,239
	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
	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			0.80% - 1.15%			3,037,708
Other borrowed funds		2,706,221				0.09% - 5.25%		—			0.09% - 2.67%			2,696,574
Subordinated debentures		347,633				1.00% - 5.00%		3.56			2.4	%		345,675
Derivative instruments with negative fair value, net of cash margin		283,589												283,589
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 basis as of September 30, 2012 (dollars in thousands):
		Carrying				Range of		Average			Discount			Estimated
		Value				Contractual		Re-pricing			Rate			Fair
						Yields		(in years)						Value
Cash and cash equivalents		$	615,494											$	615,494
Trading securities:
U.S. Government agency debentures		3,100												3,100
U.S. agency residential mortgage-backed securities		119,835												119,835
Municipal and other tax-exempt securities		58,150												58,150
Other trading securities		23,157												23,157
Total trading securities		204,242												204,242
Investment securities:
Municipal and other tax-exempt		155,144												159,464
U.S. agency residential mortgage-backed securities		91,911												95,128
Other debt securities		185,059												205,766
Total investment securities		432,114												460,358
Available for sale securities:
U.S. Treasury		1,002												1,002
Municipal and other tax-exempt		87,969												87,969
U.S. agency residential mortgage-backed securities		10,654,821												10,654,821
Privately issued residential mortgage-backed securities		331,722												331,722
Commercial mortgage-backed securities guaranteed by U.S. government agencies		339,095												339,095
Other debt securities		36,456												36,456
Perpetual preferred stock		25,288												25,288
Equity securities and mutual funds		30,081												30,081
Total available for sale securities		11,506,434												11,506,434
Fair value option securities:
U.S. agency residential mortgage-backed securities		305,445												305,445
Corporate debt securities		26,442												26,442
Total fair value option securities		331,887												331,887
Residential mortgage loans held for sale		325,102												325,102
Loans:
Commercial		7,266,907				0.25% - 30.00%		0.64			0.58% - 3.50%			7,232,761
Commercial real estate		2,177,272				0.38% - 18.00%		0.93			1.30% - 3.17%			2,142,239
Residential mortgage		2,016,303				0.38% - 18.00%		3.31			0.99% - 3.17%			2,084,251
Consumer		371,885				0.38% - 21.00%		0.32			1.43% - 3.69%			368,546
Total loans		11,832,367												11,827,797
Allowance for loan losses		(233,756		)										—
Net loans		11,598,611												11,827,797
Mortgage servicing rights		89,653												89,653
Derivative instruments with positive fair value, net of cash margin		472,783												472,783
Other assets – private equity funds		28,791												28,791
Deposits with no stated maturity		16,120,541												16,120,541
Time deposits		3,022,326				0.01% - 9.64%		2.14			0.85% - 1.15%			3,099,183
Other borrowed funds		3,429,575				0.09% - 5.25%		—			0.09% - 2.67%			3,420,135
Subordinated debentures		347,592				1.12% - 5.00%		3.79			2.26	%		345,852
Derivative instruments with negative fair value, net of cash margin		435,497												435,497

Federal_and_State_Income_Taxes1

Federal and State Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2013
Effective Income Tax Rate Reconciliation, Percent [Abstract]	'
Reconciliation of income (loss) to income tax expense	'
		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2013				2012				2013			2012
	Amount:
	Federal statutory tax	$	38,333			$	46,771			$	128,446		$	145,234
	Tax exempt revenue	(1,860		)		(1,398		)		(5,405		)	(3,996		)
	Effect of state income taxes, net of federal benefit	2,072				3,640				8,572			10,210
	Utilization of tax credits	(1,669		)		(718		)		(5,217		)	(3,282		)
	Bank-owned life insurance	(871		)		(931		)		(2,749		)	(2,886		)
	Reduction of tax accrual	(1,400		)		(950		)		(1,400		)	(950		)
	Charitable Contribution to BOKF Foundation	(1,115		)		—				(1,115		)	—
	Other, net	(29		)		(636		)		848			117
	Total	$	33,461			$	45,778			$	121,980		$	144,447
		Three Months Ended						Nine Months Ended
		September 30,						September 30,
		2013			2012			2013			2012
	Percent of pretax income:
	Federal statutory tax	35	%		35	%		35	%		35	%
	Tax exempt revenue	(2	)		(1	)		(1	)		(1	)
	Effect of state income taxes, net of federal benefit	2			3			2			2
	Utilization of tax credits	(1	)		(1	)		(1	)		(1	)
	Bank-owned life insurance	(1	)		(1	)		(1	)		(1	)
	Reduction of tax accrual	(1	)		(1	)		(1	)		—
	Charitable Contribution to BOKF Foundation	(1	)		—			—			—
	Other, net	—			—			—			1
	Total	31	%		34	%		33	%		35	%

Significant_Accounting_Policie2

Significant Accounting Policies Loans and Allowance for Credit Losses (Details)	9 Months Ended
	Sep. 30, 2013
Loans and Allowance for Credit Losses [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
Loans and Allowances for Credit Losses, Minimum No of Days After Which Past Due Non-Risk Graded Loans Are Charged Off	'60 days
Loans and Allowances for Credit Losses, Maximum 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

Trading_Securities_Details

Trading Securities (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Schedule of Trading Securities [Line Items]	'	'	'
Trading Securities, Fair Value	$150,887,000	$214,102,000	$204,242,000
Trading Securities, Net Unrealized Gain (Loss)	-86,000	151,000	684,000
U.S. Government agency debentures [Member]	'	'	'
Schedule of Trading Securities [Line Items]	'	'	'
Trading Securities, Fair Value	74,632,000	16,545,000	3,100,000
Trading Securities, Net Unrealized Gain (Loss)	-598,000	-57,000	1,000
U.S. agency residential mortgage-backed securities [Member]	'	'	'
Schedule of Trading Securities [Line Items]	'	'	'
Trading Securities, Fair Value	26,129,000	86,361,000	119,835,000
Trading Securities, Net Unrealized Gain (Loss)	456,000	447,000	566,000
Municipal and other tax-exempt securities [Member]	'	'	'
Schedule of Trading Securities [Line Items]	'	'	'
Trading Securities, Fair Value	37,057,000	90,326,000	58,150,000
Trading Securities, Net Unrealized Gain (Loss)	81,000	-226,000	118,000
Trading Securities, Pledged as Collateral	0	13,000,000	0
Other trading securities [Member]	'	'	'
Schedule of Trading Securities [Line Items]	'	'	'
Trading Securities, Fair Value	13,069,000	20,870,000	23,157,000
Trading Securities, Net Unrealized Gain (Loss)	($25,000)	($13,000)	($1,000)

Investment_HeldtoMaturity_Secu

Investment (Held-to-Maturity) Securities (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012		Sep. 30, 2011
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'		'
Investment Securities, Amortized Cost	$641,901,000		$494,493,000		$425,902,000		'
Investments Securities, Carrying Value	644,225,000	[1]	499,534,000	[2]	432,114,000	[3]	'
Investment securities, fair value	654,479,000		528,458,000		460,358,000		'
Investment Securities, Gross Unrealized Gain	14,670,000	[4]	29,427,000	[4]	28,422,000	[4]	'
Investment Securities, Gross Unrealized Loss	4,416,000	[4]	503,000	[4]	178,000	[4]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	644,225,000	[1]	499,534,000	[2]	432,114,000	[3]	'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Fair value	654,479,000		528,458,000		460,358,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Nominal Yield	3.02%		'		'		'
Investment Securities, Pledged as Collateral [Abstract]	'		'		'		'
Investment Securities, Pledged as Collateral, Carrying Value	92,442,000		117,346,000		153,224,000		'
Investment Securities, Pledged as Collateral, Fair Value	95,658,000		121,647,000		158,899,000		'
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	165		67		21		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	258,685,000		93,649,000		8,419,000		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,583,000		0		19,066,000		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	260,268,000		93,649,000		27,485,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4,351,000		503,000		39,000		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	65,000		0		139,000		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	4,416,000		503,000		178,000		'
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	56,182,000	[5]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	58,442,000	[5]	'		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	442,530,000		'		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	449,283,000		'		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Carrying Value	21,162,000		'		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Fair Value	21,405,000		'		'		'
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	124,351,000		'		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	125,349,000		'		'		'
Fixed Maturity Securities [Member]	'		'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'		'
Investments Securities, Carrying Value	588,043,000		'		'		'
Investment securities, fair value	596,037,000		'		'		'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value	38,305,000		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value	310,350,000		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value	129,242,000		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value	110,146,000		'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	588,043,000		'		'		'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Fair Value	38,575,000		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Fair Value	309,791,000		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value	128,640,000		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Fair Value	119,031,000		'		'		'
Investment Securities, Debt Maturities, Fair value	596,037,000		'		'		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield	3.51%		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Nominal Yield	1.90%		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield	3.17%		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield	5.97%		'		'		'
Investment Securities, Debt Maturities, Nominal Yield	3.04%		'		'		'
Investment Securities, Debt Maturities, Weighted Average Maturity	5.39	[6]	'		'		'
Municipal and other tax-exempt securities [Member]	'		'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'		'
Investment Securities, Amortized Cost	409,542,000		232,700,000		155,144,000		'
Investments Securities, Carrying Value	409,542,000	[1]	232,700,000	[2]	155,144,000	[3]	'
Investment securities, fair value	407,562,000		235,940,000		159,464,000		'
Investment Securities, Gross Unrealized Gain	2,316,000	[4]	3,723,000	[4]	4,329,000	[4]	'
Investment Securities, Gross Unrealized Loss	4,296,000	[4]	483,000	[4]	9,000	[4]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value	28,674,000		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value	277,808,000		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value	93,703,000		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value	9,357,000		'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	409,542,000	[1]	232,700,000	[2]	155,144,000	[3]	'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Fair Value	28,928,000		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Fair Value	276,908,000		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value	92,195,000		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Fair Value	9,531,000		'		'		'
Investment Securities, Debt Maturities, Fair value	407,562,000		235,940,000		159,464,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield	3.35%	[7]	'		'		'
Investment Securities, Debt Maturities, One to Five Years, Nominal Yield	1.52%	[7]	'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield	2.29%	[7]	'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield	2.74%	[7]	'		'		'
Investment Securities, Debt Maturities, Nominal Yield	1.85%	[7]	'		'		'
Investment Securities, Debt Maturities, Weighted Average Maturity	3.92	[6]	'		'		'
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	136		53		6		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	257,359,000		92,768,000		7,548,000		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	803,000		0		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	258,162,000		92,768,000		7,548,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4,292,000		483,000		9,000		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	4,000		0		0		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	4,296,000		483,000		9,000		'
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	[5]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[5]	'		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	275,067,000		'		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	271,781,000		'		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Carrying Value	21,162,000		'		'		'
Investment Securities, Portfolio Concentration Rated A to BBB, Fair Value	21,405,000		'		'		'
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	113,313,000		'		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	114,376,000		'		'		'
Other debt securities [Member]	'		'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'		'
Investment Securities, Amortized Cost	178,501,000		184,067,000		185,059,000		'
Investments Securities, Carrying Value	178,501,000	[1]	184,067,000	[2]	185,059,000	[3]	'
Investment securities, fair value	188,475,000		206,575,000		205,766,000		'
Investment Securities, Gross Unrealized Gain	10,094,000	[4]	22,528,000	[4]	20,737,000	[4]	'
Investment Securities, Gross Unrealized Loss	120,000	[4]	20,000	[4]	30,000	[4]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less than One Year, Net Carrying Value	9,631,000		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Net Carrying Value	32,542,000		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Net Carrying Value	35,539,000		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Net Carrying Value	100,789,000		'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	178,501,000	[1]	184,067,000	[2]	185,059,000	[3]	'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Fair Value	9,647,000		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Fair Value	32,883,000		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Fair Value	36,445,000		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Fair Value	109,500,000		'		'		'
Investment Securities, Debt Maturities, Fair value	188,475,000		206,575,000		205,766,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Less Than One Year, Nominal Yield	3.98%		'		'		'
Investment Securities, Debt Maturities, One to Five Years, Nominal Yield	5.08%		'		'		'
Investment Securities, Debt Maturities, Six to Ten Years, Nominal Yield	5.51%		'		'		'
Investment Securities, Debt Maturities, Over Ten Years, Nominal Yield	6.27%		'		'		'
Investment Securities, Debt Maturities, Nominal Yield	5.78%		'		'		'
Investment Securities, Debt Maturities, Weighted Average Maturity	8.78	[6]	'		'		'
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	29		14		14		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	1,326,000		881,000		871,000		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	780,000		0		0		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	2,106,000		881,000		871,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	59,000		20,000		30,000		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	61,000		0		0		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	120,000		20,000		30,000		'
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	[5]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	0	[5]	'		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Carrying Value	167,463,000		'		'		'
Investment Securities, Portfolio Concentration Rated AAA to AA, Fair Value	177,502,000		'		'		'
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	11,038,000		'		'		'
Investment Securities, Portfolio Concentration Not Rated, Fair Value	10,973,000		'		'		'
U.S. agency residential mortgage-backed securities [Member] | Other [Member]	'		'		'		'
Schedule of Investment (Held-to-Maturity) Securities [Line Items]	'		'		'		'
Investment Securities, Amortized Cost	53,858,000		77,726,000		85,699,000		'
Investments Securities, Carrying Value	56,182,000	[1]	82,767,000	[2]	91,911,000	[3]	'
Investment securities, fair value	58,442,000		85,943,000		95,128,000		'
Investment Securities, Gross Unrealized Gain	2,260,000	[4]	3,176,000	[4]	3,356,000	[4]	'
Investment Securities, Gross Unrealized Loss	0	[4]	0	[4]	139,000	[4]	'
Investment Securities, Debt Maturities, Net Carrying Value [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Net Carrying Value	56,182,000	[1]	82,767,000	[2]	91,911,000	[3]	'
Investment Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Fair value	58,442,000		85,943,000		95,128,000		'
Investment Securities, Debt Maturities, Nominal Yield [Abstract]	'		'		'		'
Investment Securities, Debt Maturities, Nominal Yield	2.73%	[8]	'		'		'
Investment Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities	4.2		'		'		'
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	2,300,000		5,000,000		6,200,000		13,000,000
Investment Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]	'		'		'		'
Investment Securities, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions	0		0		1		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0		0		0		'
Investment Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0		0		19,066,000		'
Investment Securities, Continuous Unrealized Loss Position, Fair Value	0		0		19,066,000		'
Investment Securities, Continuous Unrealized Loss Position, Aggregate Losses [Abstract]	'		'		'		'
Investment Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0		0		0		'
Investment Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0		139,000		'
Investment Securities, Continuous Unrealized Loss Position, Accumulated Loss	0		0		139,000		'
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	56,182,000	[5]	'		'		'
Investment Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value	58,442,000	[5]	'		'		'
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 $2.3 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 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.
[3]	Carrying value includes $6.2 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.
[4]	Gross unrealized gains and losses are not recognized in AOCI in the Consolidated Balance Sheets.
[5]	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.
[6]	Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.
[7]	Calculated on a taxable equivalent basis using a 39% effective tax rate.
[8]	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 $)

3 Months Ended

9 Months Ended

3 Months Ended

57 Months Ended

3 Months Ended

57 Months Ended

3 Months Ended

57 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2012

Fixed Maturity Securities [Member]

U.S. Treasury securities [Member]

U.S. Treasury securities [Member]

U.S. Treasury securities [Member]

Municipal and other tax-exempt securities [Member]

Municipal and other tax-exempt securities [Member]

Municipal and other tax-exempt securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Commercial mortgage-backed securities [Member]

Other debt securities [Member]

Other debt securities [Member]

Other debt securities [Member]

Residential Mortgage Backed Securities [Member]

Residential Mortgage Backed Securities [Member]

Residential Mortgage Backed Securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

U.S. agency residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Privately issued residential mortgage-backed securities [Member]

Perpetual Preferred, Equity Securities and Mutual Funds [Member]

Perpetual preferred stock [Member]

Perpetual preferred stock [Member]

Perpetual preferred stock [Member]

Equity securities and mutual funds [Member]

Equity securities and mutual funds [Member]

Equity securities and mutual funds [Member]

Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]

Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]

Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]

Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]

Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]

Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]

Government National Mortgage Association Certificates and Obligations (GNMA) [Member]

Government National Mortgage Association Certificates and Obligations (GNMA) [Member]

Government National Mortgage Association Certificates and Obligations (GNMA) [Member]

Other [Member]

Other [Member]

Other [Member]

Alt-A [Member]

Alt-A [Member]

Alt-A [Member]

Alt-A [Member]

Jumbo-A Loans [Member]

Jumbo-A Loans [Member]

Jumbo-A Loans [Member]

Jumbo-A Loans [Member]

Schedule of Available-for-sale Securities [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Amortized Cost Basis

$10,365,478

$11,224,979

$10,365,478

$11,224,979

$11,032,634

$2,115,964

$1,052

$1,000

$1,000

$93,897

$84,892

$86,326

$1,985,924

$890,746

$336,130

$35,091

$35,680

$35,710

$8,170,995

$9,973,552

$10,718,234

$7,943,449

$9,650,650

$10,381,244

$4,513,161

$5,308,463

$5,740,232

$2,412,948

$2,978,608

$3,322,692

$978,361

$1,215,554

$1,151,058

$38,979

$148,025

$167,262

$227,546

$322,902

$336,990

$227,546

$109,234

$109,234

$124,314

$128,090

$118,312

$118,312

$198,588

$208,900

$78,519

$22,171

$22,171

$22,170

$56,348

$24,593

$25,409

Available-for-sale Securities, Fair Value

10,372,903

11,506,434

10,372,903

11,506,434

11,287,221

2,078,149

1,052

1,002

1,002

95,440

87,142

87,969

1,946,295

895,075

339,095

35,362

36,389

36,456

8,212,287

10,214,984

10,986,543

7,981,387

9,889,821

10,654,821

4,544,505

5,453,549

5,900,174

2,412,116

3,045,564

3,400,215

984,065

1,237,041

1,181,134

40,701

153,667

173,298

230,900

325,163

331,722

230,900

109,592

109,592

123,174

123,583

121,308

121,308

201,989

208,139

82,467

23,680

25,072

25,288

58,787

27,557

30,081

Available-for-sale Securities, Gross Unrealized Gain

139,837

[1]

294,124

[1]

139,837

[1]

294,124

[1]

261,184

[1]

'

0

[1]

2

[1]

2

[1]

2,792

[1]

2,414

[1]

2,760

[1]

354

[1]

5,006

[1]

3,271

[1]

459

[1]

709

[1]

746

[1]

132,219

[1]

246,910

[1]

279,229

[1]

125,433

[1]

240,332

[1]

274,949

[1]

81,984

[1]

146,247

[1]

161,314

[1]

30,673

[1]

66,956

[1]

77,523

[1]

11,054

[1]

21,487

[1]

30,076

[1]

1,722

[1]

5,642

[1]

6,036

[1]

6,786

[1]

6,578

[1]

4,280

[1]

6,786

[1]

2,970

[1]

2,970

[1]

1,440

[1]

663

[1]

3,816

[1]

3,816

[1]

5,138

[1]

3,617

[1]

'

1,534

[1]

2,901

[1]

3,118

[1]

2,479

[1]

3,242

[1]

4,998

[1]

Available-for-sale Securities, Gross Unrealized Loss

129,118

[1]

2,308

[1]

129,118

[1]

2,308

[1]

2,414

[1]

'

0

[1]

0

[1]

0

[1]

1,249

[1]

164

[1]

152

[1]

39,983

[1]

677

[1]

306

[1]

188

[1]

0

[1]

0

[1]

87,633

[1]

1,295

[1]

1,524

[1]

87,495

[1]

1,161

[1]

1,372

[1]

50,640

[1]

1,161

[1]

1,372

[1]

31,505

[1]

0

[1]

0

[1]

5,350

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

138

[1]

134

[1]

152

[1]

138

[1]

0

[1]

0

[1]

0

[1]

0

[1]

138

[1]

138

[1]

134

[1]

152

[1]

'

25

[1]

0

[1]

0

[1]

40

[1]

278

[1]

326

[1]

Available-for-Sale Securities, Other Than Temporary Impairments

-3,294

[2]

-10,361

[2]

-3,294

[2]

-10,361

[2]

-4,183

[2]

'

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

-965

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

-3,294

[2]

-4,183

[2]

-9,396

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

-3,294

[2]

-4,183

[2]

-9,396

[2]

-3,294

[2]

-2,612

[2]

-2,612

[2]

-2,580

[2]

-5,170

[2]

-682

[2]

-682

[2]

-1,603

[2]

-4,226

[2]

'

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

0

[2]

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

'

'

'

'

'

2,431

1,052

'

'

1,379

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, One to Five Years, Amortized Cost Basis

'

'

'

'

'

585,039

0

'

'

34,349

'

'

520,499

'

'

30,191

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Six To Ten Years, Amortized Cost Basis

'

'

'

'

'

1,156,083

0

'

'

5,446

'

'

1,150,637

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Over Ten Years, Amortized Cost Basis

'

'

'

'

'

372,411

0

'

'

52,723

'

'

314,788

'

'

4,900

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Fair Value, Rolling Maturity [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Less than One Year, Fair Value

'

'

'

'

'

2,456

1,052

'

'

1,404

'

'

0

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, One to Five Years, Fair Value

'

'

'

'

'

580,860

0

'

'

35,542

'

'

514,668

'

'

30,650

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Six to Ten Years, Fair Value

'

'

'

'

'

1,127,625

0

'

'

5,689

'

'

1,121,936

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Over Ten Years, Fair Value

'

'

'

'

'

367,208

0

'

'

52,805

'

'

309,691

'

'

4,712

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Nominal Yield [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Less than One Year, Nominal Yield

'

'

'

'

'

0.00%

0.24%

'

'

0.00%

[3]

'

'

0.00%

'

'

0.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, One to Five Years, Nominal Yield

'

'

'

'

'

1.13%

0.00%

'

'

0.97%

[3]

'

'

1.11%

'

'

1.80%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Six To Ten Years, Nominal Yield

'

'

'

'

'

1.36%

0.00%

'

'

0.51%

[3]

'

'

1.37%

'

'

0.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Over Ten Years, Nominal Yield

'

'

'

'

'

1.54%

0.00%

'

'

2.62%

[3],[4]

'

'

1.36%

'

'

1.54%

[4]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Nominal Yield

1.79%

'

1.79%

'

'

1.33%

0.24%

'

'

1.85%

[3]

'

'

1.30%

'

'

1.77%

'

'

1.92%

[5]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.70%

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Weighted Average Maturity

'

'

'

'

'

10.29

[6]

1.42

[6]

'

'

14.5

[6]

'

'

10.18

[6]

'

'

5.56

[6]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Effective tax rate for nominal yield calculation

'

'

'

'

'

'

'

'

'

39.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Average Expected Life of Mortgage-backed Securities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Debt Maturities, Number of days for interest rates to reset

'

'

'

'

'

'

'

'

'

'35 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Gross Realized Gain (Loss), Disclosures [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Proceeds

355,650

209,325

2,140,531

1,660,876

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Gross realized gains

3,164

7,967

18,948

40,133

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Gross realized losses

-2,686

0

-9,862

-7,354

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Related federal and state income tax expense

184

3,099

3,533

12,751

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Pledged as Collateral [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Pledged As Collateral, Amortized cost

5,020,732

3,634,955

5,020,732

3,634,955

4,070,250

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Pledged As Collateral, Fair value

5,009,611

3,763,664

5,009,611

3,763,664

4,186,390

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions

431

101

431

101

106

'

0

'

'

46

[7]

38

51

[8]

116

8

8

3

3

0

168

35

40

148

12

12

79

12

12

46

0

0

23

0

0

'

'

'

20

[7]

23

[9]

28

[8]

20

[7]

10

[7]

10

[7]

12

[9]

13

[8]

10

[7]

10

[7]

11

[9]

15

[8]

'

1

0

0

97

22

2

Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, OTTI Portion, Number of Positions

'

'

'

'

'

'

'

'

'

0

0

21

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

10

10

12

13

9

9

10

14

'

'

'

'

'

'

'

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

6,265,895

541,746

6,265,895

541,746

448,144

'

0

'

'

20,274

[7]

6,150

13,492

[8]

1,803,008

275,065

42,445

4,712

4,899

0

4,431,397

161,828

483,258

4,404,735

161,828

483,258

2,328,213

161,828

483,258

1,402,010

0

0

674,512

0

0

'

'

'

26,662

[7]

0

[9]

0

[8]

26,662

[7]

11,336

[7]

11,336

[7]

0

[9]

0

[8]

15,326

[7]

15,326

[7]

0

[9]

0

[8]

'

4,975

0

0

1,529

202

2,551

Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value

80,166

255,093

80,166

255,093

159,428

'

0

'

'

19,575

[7]

26,108

27,485

[8]

0

0

0

0

0

0

60,591

131,159

227,608

0

0

0

0

0

0

0

0

0

0

0

0

'

'

'

60,591

[7]

131,159

[9]

227,608

[8]

60,591

[7]

48,849

[7]

48,849

[7]

87,907

[9]

105,862

[8]

11,742

[7]

11,742

[7]

43,252

[9]

121,746

[8]

'

0

0

0

0

2,161

0

Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value

6,346,061

796,839

6,346,061

796,839

607,572

'

0

'

'

39,849

[7]

32,258

40,977

[8]

1,803,008

275,065

42,445

4,712

4,899

0

4,491,988

292,987

710,866

4,404,735

161,828

483,258

2,328,213

161,828

483,258

1,402,010

0

0

674,512

0

0

'

'

'

87,253

[7]

131,159

[9]

227,608

[8]

87,253

[7]

60,185

[7]

60,185

[7]

87,907

[9]

105,862

[8]

27,068

[7]

27,068

[7]

43,252

[9]

121,746

[8]

'

4,975

0

0

1,529

2,363

2,551

Available-for-sale Securities, Continuous Unrealized Loss Position, Less Than Twelve Months, OTTI Portion, Fair Value

'

'

'

'

'

'

'

'

'

0

0

12,431

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11,336

11,336

0

0

15,326

15,326

0

0

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, OTTI Portion, Fair Value

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

48,849

48,849

87,907

105,862

0

0

29,128

107,071

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, OTTI Portion, Fair Value

'

'

'

'

'

'

'

'

'

0

0

12,431

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

60,185

60,185

87,907

105,862

15,326

15,326

29,128

107,071

'

'

'

'

'

'

'

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

129,472

2,974

129,472

2,974

1,850

'

0

'

'

352

[7]

11

970

[8]

39,983

677

306

188

0

0

88,884

1,161

1,372

87,495

1,161

1,372

50,640

1,161

1,372

31,505

0

0

5,350

0

0

'

'

'

1,389

[7]

0

[9]

0

[8]

1,389

[7]

707

[7]

707

[7]

0

[9]

0

[8]

682

[7]

682

[7]

0

[9]

0

[8]

'

25

0

0

40

1

326

Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss

2,940

9,695

2,940

9,695

4,747

'

0

'

'

897

[7]

153

147

[8]

0

0

0

0

0

0

2,043

4,317

9,548

0

0

0

0

0

0

0

0

0

0

0

0

'

'

'

2,043

[7]

4,317

[9]

9,548

[8]

2,043

[7]

1,905

[7]

1,905

[7]

2,580

[9]

5,170

[8]

138

[7]

138

[7]

1,737

[9]

4,378

[8]

'

0

0

0

0

277

0

Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss

132,412

12,669

132,412

12,669

6,597

'

0

'

'

1,249

[7]

164

1,117

[8]

39,983

677

306

188

0

0

90,927

5,478

10,920

87,495

1,161

1,372

50,640

1,161

1,372

31,505

0

0

5,350

0

0

'

'

'

3,432

[7]

4,317

[9]

9,548

[8]

3,432

[7]

2,612

[7]

2,612

[7]

2,580

[9]

5,170

[8]

820

[7]

820

[7]

1,737

[9]

4,378

[8]

'

25

0

0

40

278

326

Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses

'

'

'

'

'

'

'

'

'

0

0

965

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

707

707

0

0

682

682

0

0

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, OTTI Portion, Aggregate Losses

'

'

'

'

'

'

'

'

'

0

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,905

1,905

2,580

5,170

0

0

1,602

4,226

'

'

'

'

'

'

'

Available-for-sale Securities, Continuous Unrealized Loss Position, OTTI Portion, Aggregate Losses

'

'

'

'

'

'

'

'

'

0

0

965

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,612

2,612

2,580

5,170

682

682

1,602

4,226

'

'

'

'

'

'

'

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

9,930,425

[10]

'

9,930,425

[10]

'

'

'

1,052

[10]

'

'

0

[10]

'

'

1,985,924

[10]

'

'

0

[10]

'

'

7,943,449

[10]

'

'

7,943,449

[10]

'

'

4,513,161

[10]

'

'

2,412,948

[10]

'

'

978,361

[10]

'

'

38,979

[10]

'

'

0

[10]

'

'

0

[10]

0

[10]

0

[10]

'

'

0

[10]

0

[10]

'

'

'

0

[10]

'

'

0

[10]

'

'

Available-for-sale Securities, Portfolio Concentration US Govt or GSE Securities Not Rated, Fair Value

9,928,734

[10]

'

9,928,734

[10]

'

'

'

1,052

[10]

'

'

0

[10]

'

'

1,946,295

[10]

'

'

0

[10]

'

'

7,981,387

[10]

'

'

7,981,387

[10]

'

'

4,544,505

[10]

'

'

2,412,116

[10]

'

'

984,065

[10]

'

'

40,701

[10]

'

'

0

[10]

'

'

0

[10]

0

[10]

0

[10]

'

'

0

[10]

0

[10]

'

'

'

0

[10]

'

'

0

[10]

'

'

Available-for-sale securities, Portfolio Concentration Rated AAA To AA, Amortized Cost

52,651

'

52,651

'

'

'

0

'

'

47,747

'

'

0

'

'

4,900

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

0

0

'

'

0

0

'

'

'

0

'

'

4

'

'

Available-for-sale Securities, Portfolio Concentration Rated AAA To AA, Fair Value

53,717

'

53,717

'

'

'

0

'

'

48,564

'

'

0

'

'

4,712

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

0

0

'

'

0

0

'

'

'

0

'

'

441

'

'

Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Amortized Cost

57,416

'

57,416

'

'

'

0

'

'

15,819

'

'

0

'

'

30,191

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

0

0

'

'

0

0

'

'

'

11,406

'

'

0

'

'

Available-for-sale Securities, Portfolio Concentration Rated A To BBB, Fair Value

57,997

'

57,997

'

'

'

0

'

'

15,525

'

'

0

'

'

30,650

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

0

0

'

'

0

0

'

'

'

11,822

'

'

0

'

'

Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Amortized Cost

256,235

'

256,235

'

'

'

0

'

'

17,924

'

'

0

'

'

0

'

'

227,546

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

227,546

'

'

227,546

109,234

109,234

'

'

118,312

118,312

'

'

'

10,765

'

'

0

'

'

Available-for-sale Securities, Portfolio Concentration Rated Below Investment Grade, Fair Value

261,898

'

261,898

'

'

'

0

'

'

19,140

'

'

0

'

'

0

'

'

230,900

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

230,900

'

'

230,900

109,592

109,592

'

'

121,308

121,308

'

'

'

11,858

'

'

0

'

'

Available-for-sale Securities, Portfolio Concentration Not Rated, Amortized Cost

68,751

'

68,751

'

'

'

0

'

'

12,407

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

0

0

'

'

0

0

'

'

'

0

'

'

56,344

'

'

Available-for-sale Securities, Portfolio Concentration Not Rated, Fair Value

70,557

'

70,557

'

'

'

0

'

'

12,211

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

'

'

0

0

0

'

'

0

0

'

'

'

0

'

'

58,346

'

'

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 7.5% over the next 12 months and remain at 7.5% thereafter

'Increasing to 8.5% over the next 12 months, dropping to 8% over the following 21 months and holding at 8% 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 5% 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]

'Starting with current depreciated housing prices based on information derived from the FHFA1, depreciating 2% over the next 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.

'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.

'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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

45

'

'

45

16

16

'

'

29

29

'

'

'

'

'

'

'

'

'

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

'

'

45

1

16

'

'

0

29

'

'

'

'

'

'

'

'

'

Amount of Credit Losses Recognized in Current Period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$139

'

'

$67,346

$139

$49,126

'

'

$0

$18,220

'

'

'

'

'

'

'

'

'

[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.

[3]

Calculated on a taxable equivalent basis using a 39% effective tax rate.

[4]

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.

[5]

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.

[6]

Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.

[7]

Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:Municipal and other tax-exempt — $— $— $— $— $— $—Alt-A loans 10 11,336 707 48,849 1,905 60,185 2,612Jumbo-A loans 9 15,326 682 — — 15,326 682

[8]

Includes the following securities for which an unrealized loss remains in AOCI after an other-than-temporary credit loss has been recognized in income:Municipal and other tax-exempt 21 $12,431 $965 $— $— $12,431 $965Alt-A loans 13 — — 105,862 5,170 105,862 5,170Jumbo-A loans 14 — — 107,071 4,226 107,071 4,226

[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:Municipal and other tax-exempt — $— $— $— $— $— $—Alt-A loans 12 $— $— $87,907 $2,580 $87,907 $2,580Jumbo-A loans 10 — — 29,128 1,602 29,128 1,602

[10]

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.

[11]

Federal Housing Finance Agency

Rollforward_of_CreditRelated_O

Rollforward of Credit-Related Other-than-temporary Impairment Recognized in Earnings (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Mar. 31, 2012
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	$76,027	$72,915
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, No Previous Impairment	67	0	619	248	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses	73	1,104	320	5,436	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status	-3,589	0	-3,589	0	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold	-5,232	0	-5,232	-7,796	'	'
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Ending Balance	$67,346	$74,019	$67,346	$74,019	$76,027	$72,915

Securities_Fair_Value_Option_S

Securities Fair Value Option Securities (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Schedule of Fair Value Option Securities [Line Items]	'	'	'
Fair Value Option Securities, Fair Value	$167,860	$284,296	$331,887
Fair Value Option Securities, Unrealized Gain or Loss	-5,364	4,770	15,186
U.S. agency residential mortgage-backed securities [Member]	'	'	'
Schedule of Fair Value Option Securities [Line Items]	'	'	'
Fair Value Option Securities, Fair Value	163,567	257,040	305,445
Fair Value Option Securities, Unrealized Gain or Loss	-5,365	3,314	13,827
Corporate debt securities [Member]	'	'	'
Schedule of Fair Value Option Securities [Line Items]	'	'	'
Fair Value Option Securities, Fair Value	0	26,486	26,442
Fair Value Option Securities, Unrealized Gain or Loss	0	1,409	1,359
Other debt securities [Member]	'	'	'
Schedule of Fair Value Option Securities [Line Items]	'	'	'
Fair Value Option Securities, Fair Value	4,293	770	0
Fair Value Option Securities, Unrealized Gain or Loss	$1	$47	$0

Derivatives_Fair_Value_of_Deri

Derivatives, Fair Value of Derivatives Contracts (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derviative contracts, net of cash margin, assets	$377,325,000		$338,106,000		$435,653,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Fair Value, Net of Cash Collateral	232,544,000		283,589,000		254,422,000
Increase in cash margin obligation for derivative holdings with a decrease in credit rating from A1 to below investment grade	27,000,000		'		'
Not Designated as Hedging Instrument [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	15,869,618,000	[1]	16,188,105,000	[1]	18,348,043,000	[1]
Derivative Liability, Notional	15,977,434,000	[1]	16,547,182,000	[1]	18,223,460,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	531,960,000		404,875,000		641,420,000
Derivative Asset, Netting Adjustments	-145,478,000		-63,305,000		-194,614,000
Derivative Assets, Net Fair Value Before Cash Collateral	386,482,000		341,570,000		446,806,000
Derivative Asset, Cash Collateral	-9,157,000		-3,464,000		-11,153,000
Derviative contracts, net of cash margin, assets	377,325,000		338,106,000		435,653,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	530,432,000		396,263,000		633,658,000
Derivative Liability, Netting Adjustments	-145,478,000		-63,305,000		-194,614,000
Derivative Liability, Net Fair Value Before Cash Collateral	384,954,000		332,958,000		439,044,000
Derivative Liability, Fair Value, Cash Collateral	-152,410,000		-49,369,000		-184,622,000
Derivative Liability, Fair Value, Net of Cash Collateral	232,544,000		283,589,000		254,422,000
Not Designated as Hedging Instrument [Member] | To-be-announced residential mortgage-backed securities [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	12,455,689,000	[1]	12,850,805,000	[1]	14,858,520,000	[1]
Derivative Liability, Notional	12,529,704,000	[1]	13,239,078,000	[1]	14,738,232,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	224,392,000		46,113,000		276,678,000
Derivative Asset, Netting Adjustments	-99,970,000		-15,656,000		-121,573,000
Derivative Assets, Net Fair Value Before Cash Collateral	124,422,000		30,457,000		155,105,000
Derivative Asset, Cash Collateral	-5,191,000		0		-7,287,000
Derviative contracts, net of cash margin, assets	119,231,000		30,457,000		147,818,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	221,720,000		43,064,000		274,195,000
Derivative Liability, Netting Adjustments	-99,970,000		-15,656,000		-121,573,000
Derivative Liability, Net Fair Value Before Cash Collateral	121,750,000		27,408,000		152,622,000
Derivative Liability, Fair Value, Cash Collateral	-118,166,000		-15,467,000		-143,945,000
Derivative Liability, Fair Value, Net of Cash Collateral	3,584,000		11,941,000		8,677,000
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	1,361,499,000	[1]	1,319,827,000	[1]	1,301,109,000	[1]
Derivative Liability, Notional	1,361,499,000	[1]	1,319,827,000	[1]	1,301,109,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	49,183,000		72,201,000		79,350,000
Derivative Asset, Netting Adjustments	0		0		0
Derivative Assets, Net Fair Value Before Cash Collateral	49,183,000		72,201,000		79,350,000
Derivative Asset, Cash Collateral	0		0		0
Derviative contracts, net of cash margin, assets	49,183,000		72,201,000		79,350,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	49,518,000		72,724,000		79,937,000
Derivative Liability, Netting Adjustments	0		0		0
Derivative Liability, Net Fair Value Before Cash Collateral	49,518,000		72,724,000		79,937,000
Derivative Liability, Fair Value, Cash Collateral	-21,240,000		-31,945,000		-37,841,000
Derivative Liability, Fair Value, Net of Cash Collateral	28,278,000		40,779,000		42,096,000
Not Designated as Hedging Instrument [Member] | Energy contracts [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	1,412,238,000	[1]	1,346,780,000	[1]	1,556,164,000	[1]
Derivative Liability, Notional	1,400,542,000	[1]	1,334,349,000	[1]	1,596,791,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	73,293,000		82,349,000		105,588,000
Derivative Asset, Netting Adjustments	-42,078,000		-44,485,000		-67,030,000
Derivative Assets, Net Fair Value Before Cash Collateral	31,215,000		37,864,000		38,558,000
Derivative Asset, Cash Collateral	-606,000		-3,464,000		-3,866,000
Derviative contracts, net of cash margin, assets	30,609,000		34,400,000		34,692,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	71,971,000		83,654,000		107,556,000
Derivative Liability, Netting Adjustments	-42,078,000		-44,485,000		-67,030,000
Derivative Liability, Net Fair Value Before Cash Collateral	29,893,000		39,169,000		40,526,000
Derivative Liability, Fair Value, Cash Collateral	-10,762,000		-1,769,000		-2,836,000
Derivative Liability, Fair Value, Net of Cash Collateral	19,131,000		37,400,000		37,690,000
Not Designated as Hedging Instrument [Member] | Agricultural contracts [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	262,770,000	[1]	212,434,000	[1]	198,735,000	[1]
Derivative Liability, Notional	261,782,000	[1]	212,135,000	[1]	195,068,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	5,783,000		3,638,000		6,835,000
Derivative Asset, Netting Adjustments	-3,430,000		-3,164,000		-6,011,000
Derivative Assets, Net Fair Value Before Cash Collateral	2,353,000		474,000		824,000
Derivative Asset, Cash Collateral	0		0		0
Derviative contracts, net of cash margin, assets	2,353,000		474,000		824,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	5,731,000		3,571,000		6,750,000
Derivative Liability, Netting Adjustments	-3,430,000		-3,164,000		-6,011,000
Derivative Liability, Net Fair Value Before Cash Collateral	2,301,000		407,000		739,000
Derivative Liability, Fair Value, Cash Collateral	-2,242,000		-188,000		0
Derivative Liability, Fair Value, Net of Cash Collateral	59,000		219,000		739,000
Not Designated as Hedging Instrument [Member] | Foreign exchange contracts [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	164,970,000	[1]	180,318,000	[1]	150,232,000	[1]
Derivative Liability, Notional	164,455,000	[1]	179,852,000	[1]	149,977,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	164,970,000		180,318,000		150,232,000
Derivative Asset, Netting Adjustments	0		0		0
Derivative Assets, Net Fair Value Before Cash Collateral	164,970,000		180,318,000		150,232,000
Derivative Asset, Cash Collateral	0		0		0
Derviative contracts, net of cash margin, assets	164,970,000		180,318,000		150,232,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	164,455,000		179,852,000		149,977,000
Derivative Liability, Netting Adjustments	0		0		0
Derivative Liability, Net Fair Value Before Cash Collateral	164,455,000		179,852,000		149,977,000
Derivative Liability, Fair Value, Cash Collateral	0		0		0
Derivative Liability, Fair Value, Net of Cash Collateral	164,455,000		179,852,000		149,977,000
Not Designated as Hedging Instrument [Member] | Equity option contracts [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	212,452,000	[1]	211,941,000	[1]	217,283,000	[1]
Derivative Liability, Notional	212,452,000	[1]	211,941,000	[1]	217,283,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	14,339,000		12,593,000		14,460,000
Derivative Asset, Netting Adjustments	0		0		0
Derivative Assets, Net Fair Value Before Cash Collateral	14,339,000		12,593,000		14,460,000
Derivative Asset, Cash Collateral	-3,360,000		0		0
Derviative contracts, net of cash margin, assets	10,979,000		12,593,000		14,460,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	14,339,000		12,593,000		14,460,000
Derivative Liability, Netting Adjustments	0		0		0
Derivative Liability, Net Fair Value Before Cash Collateral	14,339,000		12,593,000		14,460,000
Derivative Liability, Fair Value, Cash Collateral	0		0		0
Derivative Liability, Fair Value, Net of Cash Collateral	14,339,000		12,593,000		14,460,000
Not Designated as Hedging Instrument [Member] | Customer risk management programs [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	15,869,618,000	[1]	16,122,105,000	[1]	18,282,043,000	[1]
Derivative Liability, Notional	15,930,434,000	[1]	16,497,182,000	[1]	18,198,460,000	[1]
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	531,960,000		397,212,000		633,143,000
Derivative Asset, Netting Adjustments	-145,478,000		-63,305,000		-194,614,000
Derivative Assets, Net Fair Value Before Cash Collateral	386,482,000		333,907,000		438,529,000
Derivative Asset, Cash Collateral	-9,157,000		-3,464,000		-11,153,000
Derviative contracts, net of cash margin, assets	377,325,000		330,443,000		427,376,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	527,734,000		395,458,000		632,875,000
Derivative Liability, Netting Adjustments	-145,478,000		-63,305,000		-194,614,000
Derivative Liability, Net Fair Value Before Cash Collateral	382,256,000		332,153,000		438,261,000
Derivative Liability, Fair Value, Cash Collateral	-152,410,000		-49,369,000		-184,622,000
Derivative Liability, Fair Value, Net of Cash Collateral	229,846,000		282,784,000		253,639,000
Not Designated as Hedging Instrument [Member] | Interest rate risk management programs [Member]	'		'		'
Notional Amount of Derivatives [Abstract]	'		'		'
Derivative Asset, Notional	0	[1]	66,000,000	[1]	66,000,000	[1]
Derivative Liability, Notional	47,000,000	[1]	50,000,000	[1]	25,000,000	[1]
Derivatives, Notional	47,000,000	[1]	'		'
Derivative Asset, Fair Value, Net [Abstract]	'		'		'
Derivative Asset, Gross Fair Value	0		7,663,000		8,277,000
Derivative Asset, Netting Adjustments	0		0		0
Derivative Assets, Net Fair Value Before Cash Collateral	0		7,663,000		8,277,000
Derivative Asset, Cash Collateral	0		0		0
Derviative contracts, net of cash margin, assets	0		7,663,000		8,277,000
Derivative Liability, Fair Value, Net [Abstract]	'		'		'
Derivative Liability, Gross Fair Value	2,698,000		805,000		783,000
Derivative Liability, Netting Adjustments	0		0		0
Derivative Liability, Net Fair Value Before Cash Collateral	2,698,000		805,000		783,000
Derivative Liability, Fair Value, Cash Collateral	0		0		0
Derivative Liability, Fair Value, Net of Cash Collateral	$2,698,000		$805,000		$783,000
[1]	Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.

Derivatives_Derivatives_Instru

Derivatives, Derivatives Instruments Gain (Loss) in Income Statement (Details) (Not Designated as Hedging Instrument [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	$544	$1,998	$8,544	$10,861
Gain (Loss) on Derivatives, Net	31	464	-3,437	336
To-be-announced residential mortgage-backed securities [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	-2,078	-803	-377	504
Gain (Loss) on Derivatives, Net	0	0	0	0
Interest rate swaps [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	679	706	2,214	2,850
Gain (Loss) on Derivatives, Net	0	0	0	0
Energy contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	1,682	1,856	5,901	6,754
Gain (Loss) on Derivatives, Net	0	0	0	0
Agricultural contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	69	115	254	298
Gain (Loss) on Derivatives, Net	0	0	0	0
Foreign exchange contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	192	124	552	455
Gain (Loss) on Derivatives, Net	0	0	0	0
Equity option contracts [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	0	0	0	0
Gain (Loss) on Derivatives, Net	0	0	0	0
Customer risk management programs [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	544	1,998	8,544	10,861
Gain (Loss) on Derivatives, Net	0	0	0	0
Interest rate risk management programs [Member]	'	'	'	'
Derivative Instruments, Gain (Loss) Recognized in Income, Net [Abstract]	'	'	'	'
Brokergage and Trading Revenue	0	0	0	0
Gain (Loss) on Derivatives, Net	$31	$464	($3,437)	$336

Loans_and_Allowance_for_Credit

Loans and Allowance for Credit Losses Part 1 (Details) (USD $)	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012
Loan receivables disclosure [Abstract]	'		'		'
Loans, fixed rate of interest	$6,982,707,000		$6,926,021,000		$6,679,751,000
Loans, variable rate of interest	5,254,489,000		5,251,025,000		5,020,717,000
Loans, non-accrual	112,904,000		134,410,000		131,899,000
Total	12,350,100,000		12,311,456,000		11,832,367,000
Accruing loans past due (90 days)	188,000	[1]	3,925,000	[1]	1,181,000	[1]
Loans receivable, other information [Abstract]	'		'		'
Amount of total loan portfolio to businesses and individuals in Oklahoma	5,100,000,000		'		'
Percentage of total loan portfolio to businesses and individuals in Oklahoma (in hundredths)	41.00%		'		'
Amount of total loan portfolio to businesses and individuals in Texas	4,100,000,000		'		'
Percentage of total loan portfolio to businesses and individuals in Texas (in hundredths)	33.00%		'		'
Credit Commitments [Abstract]	'		'		'
Outstanding commitments to extend credit	7,200,000,000		'		'
Outstanding standby letters of credit	440,000,000		'		'
Outstanding commercial letters of credit	12,000,000		'		'
Commercial [Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Loans, fixed rate of interest	4,209,349,000		4,158,548,000		3,889,382,000
Loans, variable rate of interest	3,342,204,000		3,458,897,000		3,355,763,000
Loans, non-accrual	19,522,000		24,467,000		21,762,000
Total	7,571,075,000		7,641,912,000		7,266,907,000
Loans receivable, other information [Abstract]	'		'		'
Amount of loan portfolio to businesses in Oklahoma	2,800,000,000		'		'
Percentage of loan portfolio to businesses in Oklahoma (in hundredths)	37.00%		'		'
Amount of loan portfolio to businesses in Texas	2,900,000,000		'		'
Percentage of loan portfolio to businesses in Texas (in hundredths)	38.00%		'		'
Energy [Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Total	2,311,991,000		2,460,659,000		2,416,877,000
Loans receivable, other information [Abstract]	'		'		'
Percentage of energy loans in loan portfolio	19.00%		'		'
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]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Total	2,148,551,000		2,164,186,000		1,967,568,000
Loans receivable, other information [Abstract]	'		'		'
Amount of loans with individual balances less than $10 million	1,100,000,000		'		'
Maximum loan amount for certain individual loans in category	10,000,000		'		'
Commercial Real Estate [Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Loans, fixed rate of interest	869,346,000		845,023,000		880,535,000
Loans, variable rate of interest	1,427,381,000		1,323,350,000		1,220,976,000
Loans, non-accrual	52,502,000		60,626,000		75,761,000
Total	2,349,229,000		2,228,999,000		2,177,272,000
Loans receivable, other information [Abstract]	'		'		'
Percentage of loan portfolio secured by property in Texas (in hundredths)	36.00%		'		'
Percentage of loan portfolio secured by property in Oklahoma (in hundredths)	24.00%		'		'
Residential Mortgage [Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Loans, fixed rate of interest	1,766,819,000		1,747,038,000		1,728,220,000
Loans, variable rate of interest	228,690,000		251,394,000		258,816,000
Loans, non-accrual	39,256,000		46,608,000		29,267,000
Total	2,034,765,000		2,045,040,000		2,016,303,000
Permanent mortage [Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Total	1,078,661,000		1,123,965,000		1,138,960,000
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 US govenment agencies [Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Total	163,919,000		160,444,000		162,271,000
Loans receivable, other information [Abstract]	'		'		'
Amount of loans guaranteed by US government and previously sold into GNMA mortgage pools	164,000,000		'		'
Home equity {Member]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Total	792,185,000		760,631,000		715,072,000
Loans receivable, other information [Abstract]	'		'		'
Percentage of home equity portfolio comprised of first lien loans	70.00%		'		'
Percentage of home equity portfolio comprised of junior lien loans	30.00%		'		'
Percentage of junior lien home equity loans that are amortizing term loans	75.00%		'		'
Percentage of junior lien home equity loans that are revolving lines of credit	25.00%		'		'
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]	'		'		'
Loan receivables disclosure [Abstract]	'		'		'
Loans, fixed rate of interest	137,193,000		175,412,000		181,614,000
Loans, variable rate of interest	256,214,000		217,384,000		185,162,000
Loans, non-accrual	1,624,000		2,709,000		5,109,000
Total	$395,031,000		$395,505,000		$371,885,000
[1]	Excludes residential mortgage loans guaranteed by agencies of the U.S. government

Loans_and_Allowances_for_Credi2

Loans and Allowances for Credit Losses Part 2 (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2013	Sep. 30, 2012		Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		$215,507,000	$253,481,000		$203,124,000	'	$231,669,000
Provision for loan losses	-8,500,000	7,804,000		-16,189,000	-682,000		'	'	'
Loans charged off	-4,708,000	-8,921,000		-22,169,000	-34,138,000		'	'	'
Recoveries	4,409,000	3,204,000		17,176,000	15,095,000		'	'	'
Ending balance	194,325,000	233,756,000		194,325,000	233,756,000		203,124,000	'	231,669,000
Allowance for off-balance sheet credit losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		1,915,000	9,261,000		1,604,000	'	9,747,000
Provision for off-balance sheet credit losses	0	-7,804,000		-311,000	-7,318,000		'	'	'
Ending balance	1,604,000	1,943,000		1,604,000	1,943,000		1,604,000	'	9,747,000
Total provision for credit losses	-8,500,000	0		-16,500,000	-8,000,000		'	'	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	12,237,773,000	11,700,978,000		12,237,773,000	11,700,978,000		'	12,177,535,000	'
Individually measured for impairment, recorded investment	112,327,000	131,389,000		112,327,000	131,389,000		'	133,921,000	'
Total	12,350,100,000	11,832,367,000		12,350,100,000	11,832,367,000		'	12,311,456,000	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	152,169,000	189,175,000		152,169,000	189,175,000		'	167,087,000	'
Individually measured for impairment, related allowance	1,274,000	3,667,000		1,274,000	3,667,000		'	4,233,000	'
Total measured for impairment, related allowance	194,325,000	233,756,000		194,325,000	233,756,000		203,124,000	'	231,669,000
Commercial [Member]	'	'		'	'		'	'	'
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		65,280,000	83,443,000		64,044,000	'	83,477,000
Provision for loan losses	-1,774,000	4,000		-3,507,000	995,000		'	'	'
Loans charged off	-1,354,000	-812,000		-6,190,000	-7,840,000		'	'	'
Recoveries	864,000	-890,000	[1]	6,197,000	5,181,000	[1]	'	'	'
Ending balance	61,780,000	81,779,000		61,780,000	81,779,000		64,044,000	'	83,477,000
Allowance for off-balance sheet credit losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		475,000	7,906,000		402,000	'	8,224,000
Provision for off-balance sheet credit losses	-228,000	-7,823,000		-301,000	-7,505,000		'	'	'
Ending balance	174,000	401,000		174,000	401,000		402,000	'	8,224,000
Total provision for credit losses	-2,002,000	-7,819,000		-3,808,000	-6,510,000		'	'	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	7,551,553,000	7,245,145,000		7,551,553,000	7,245,145,000		'	7,617,445,000	'
Individually measured for impairment, recorded investment	19,522,000	21,762,000		19,522,000	21,762,000		'	24,467,000	'
Total	7,571,075,000	7,266,907,000		7,571,075,000	7,266,907,000		'	7,641,912,000	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	61,208,000	81,575,000		61,208,000	81,575,000		'	65,050,000	'
Individually measured for impairment, related allowance	572,000	204,000		572,000	204,000		'	230,000	'
Total measured for impairment, related allowance	61,780,000	81,779,000		61,780,000	81,779,000		64,044,000	'	83,477,000
Commercial Real Estate [Member]	'	'		'	'		'	'	'
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		54,884,000	67,034,000		49,687,000	'	55,806,000
Provision for loan losses	-6,279,000	4,821,000		-10,077,000	-322,000		'	'	'
Loans charged off	-419,000	-2,607,000		-5,669,000	-10,548,000		'	'	'
Recoveries	2,073,000	2,684,000		5,924,000	4,540,000		'	'	'
Ending balance	45,062,000	60,704,000		45,062,000	60,704,000		49,687,000	'	55,806,000
Allowance for off-balance sheet credit losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		1,353,000	1,250,000		1,178,000	'	1,425,000
Provision for off-balance sheet credit losses	202,000	18,000		27,000	193,000		'	'	'
Ending balance	1,380,000	1,443,000		1,380,000	1,443,000		1,178,000	'	1,425,000
Total provision for credit losses	-6,077,000	4,839,000		-10,050,000	-129,000		'	'	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	2,296,727,000	2,101,511,000		2,296,727,000	2,101,511,000		'	2,168,373,000	'
Individually measured for impairment, recorded investment	52,502,000	75,761,000		52,502,000	75,761,000		'	60,626,000	'
Total	2,349,229,000	2,177,272,000		2,349,229,000	2,177,272,000		'	2,228,999,000	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	44,574,000	57,587,000		44,574,000	57,587,000		'	51,775,000	'
Individually measured for impairment, related allowance	488,000	3,117,000		488,000	3,117,000		'	3,109,000	'
Total measured for impairment, related allowance	45,062,000	60,704,000		45,062,000	60,704,000		49,687,000	'	55,806,000
Residential Mortgage [Member]	'	'		'	'		'	'	'
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		41,703,000	46,476,000		39,206,000	'	42,688,000
Provision for loan losses	-136,000	-370,000		187,000	528,000		'	'	'
Loans charged off	-961,000	-1,600,000		-4,797,000	-7,447,000		'	'	'
Recoveries	188,000	298,000		1,204,000	1,459,000		'	'	'
Ending balance	38,297,000	41,016,000		38,297,000	41,016,000		39,206,000	'	42,688,000
Allowance for off-balance sheet credit losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		78,000	91,000		6,000	'	80,000
Provision for off-balance sheet credit losses	42,000	-4,000		-30,000	-15,000		'	'	'
Ending balance	48,000	76,000		48,000	76,000		6,000	'	80,000
Total provision for credit losses	-94,000	-374,000		157,000	513,000		'	'	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	1,996,086,000	1,987,546,000		1,996,086,000	1,987,546,000		'	1,998,921,000	'
Individually measured for impairment, recorded investment	38,679,000	28,757,000		38,679,000	28,757,000		'	46,119,000	'
Total	2,034,765,000	2,016,303,000		2,034,765,000	2,016,303,000		'	2,045,040,000	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	38,083,000	40,799,000		38,083,000	40,799,000		'	40,934,000	'
Individually measured for impairment, related allowance	214,000	217,000		214,000	217,000		'	769,000	'
Total measured for impairment, related allowance	38,297,000	41,016,000		38,297,000	41,016,000		39,206,000	'	42,688,000
Consumer [Member]	'	'		'	'		'	'	'
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		9,453,000	10,178,000		7,738,000	'	8,840,000
Provision for loan losses	1,256,000	3,293,000		513,000	3,553,000		'	'	'
Loans charged off	-1,974,000	-3,902,000		-5,513,000	-8,303,000		'	'	'
Recoveries	1,284,000	1,112,000		3,851,000	3,915,000		'	'	'
Ending balance	8,304,000	9,343,000		8,304,000	9,343,000		7,738,000	'	8,840,000
Allowance for off-balance sheet credit losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		9,000	14,000		18,000	'	18,000
Provision for off-balance sheet credit losses	-16,000	5,000		-7,000	9,000		'	'	'
Ending balance	2,000	23,000		2,000	23,000		18,000	'	18,000
Total provision for credit losses	1,240,000	3,298,000		506,000	3,562,000		'	'	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	393,407,000	366,776,000		393,407,000	366,776,000		'	392,796,000	'
Individually measured for impairment, recorded investment	1,624,000	5,109,000		1,624,000	5,109,000		'	2,709,000	'
Total	395,031,000	371,885,000		395,031,000	371,885,000		'	395,505,000	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	8,304,000	9,214,000		8,304,000	9,214,000		'	9,328,000	'
Individually measured for impairment, related allowance	0	129,000		0	129,000		'	125,000	'
Total measured for impairment, related allowance	8,304,000	9,343,000		8,304,000	9,343,000		7,738,000	'	8,840,000
Specific Allowance [Member]	'	'		'	'		'	'	'
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		'	'		'	171,320,000	'
Ending balance	153,443,000	192,842,000		153,443,000	192,842,000		'	171,320,000	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	12,237,773,000	11,700,978,000		12,237,773,000	11,700,978,000		'	12,177,535,000	'
Individually measured for impairment, recorded investment	112,327,000	131,389,000		112,327,000	131,389,000		'	133,921,000	'
Total	12,350,100,000	11,832,367,000		12,350,100,000	11,832,367,000		'	12,311,456,000	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	152,169,000	189,175,000		152,169,000	189,175,000		'	167,087,000	'
Individually measured for impairment, related allowance	1,274,000	3,667,000		1,274,000	3,667,000		'	4,233,000	'
Total measured for impairment, related allowance	153,443,000	192,842,000		153,443,000	192,842,000		'	171,320,000	'
Nonspecific Allowance [Member]	'	'		'	'		'	'	'
Allowance for loan losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		44,187,000	46,350,000		42,449,000	'	40,858,000
Provision for loan losses	-1,567,000	56,000		-3,305,000	-5,436,000		'	'	'
Loans charged off	0	0		0	0		'	'	'
Recoveries	0	0		0	0		'	'	'
Ending balance	40,882,000	40,914,000		40,882,000	40,914,000		42,449,000	'	40,858,000
Allowance for off-balance sheet credit losses [Roll Forward]	'	'		'	'		'	'	'
Beginning balance	'	'		0	0		0	'	0
Provision for off-balance sheet credit losses	0	0		0	0		'	'	'
Ending balance	0	0		0	0		0	'	0
Total provision for credit losses	-1,567,000	56,000		-3,305,000	-5,436,000		'	'	'
Recorded investment [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, recorded investment	0	0		0	0		'	0	'
Individually measured for impairment, recorded investment	0	0		0	0		'	0	'
Total	0	0		0	0		'	0	'
Related allowance [Abstract]	'	'		'	'		'	'	'
Collectively measured for impairment, related allowance	0	0		0	0		'	0	'
Individually measured for impairment, related allowance	0	0		0	0		'	0	'
Total measured for impairment, related allowance	$40,882,000	$40,914,000		$40,882,000	$40,914,000		$42,449,000	'	$40,858,000
[1]	Includes $7.1 million of negative recovery related to a refund of a settlement between BOK Financial and the City of Tulsa by the Oklahoma Supreme Court. Excluding this refund, BOK Financial had net charge-offs (recoveries) to average loans of (0.05%) on an annualized basis.

Loans_and_Allowances_for_Credi3

Loans and Allowances for Credit Losses Part 3 (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	$10,407,469,000	'	$10,350,320,000	$9,905,051,000	'	'
Non-Graded, Recorded Investment	1,942,631,000	'	1,961,136,000	1,927,316,000	'	'
Total	12,350,100,000	'	12,311,456,000	11,832,367,000	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	112,193,000	'	127,322,000	150,507,000	'	'
Non-Graded, Allowance	41,250,000	'	43,998,000	42,335,000	'	'
Allowance For Financing Receivable Total	194,325,000	203,124,000	215,507,000	233,756,000	231,669,000	253,481,000
Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	10,254,835,000	'	10,111,255,000	9,644,865,000	'	'
Non-Graded, Recorded Investment	1,907,425,000	'	1,924,879,000	1,905,500,000	'	'
Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	74,936,000	'	140,912,000	150,103,000	'	'
Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	77,698,000	'	98,153,000	110,083,000	'	'
Non-Graded, Recorded Investment	35,206,000	'	36,257,000	21,816,000	'	'
Commercial [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	7,553,151,000	'	7,624,442,000	7,249,429,000	'	'
Non-Graded, Recorded Investment	17,924,000	'	17,470,000	17,478,000	'	'
Total	7,571,075,000	'	7,641,912,000	7,266,907,000	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	60,570,000	'	64,181,000	80,676,000	'	'
Non-Graded, Allowance	1,210,000	'	1,099,000	1,103,000	'	'
Allowance For Financing Receivable Total	61,780,000	'	65,280,000	81,779,000	'	'
Commercial [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	7,507,021,000	'	7,533,757,000	7,161,823,000	'	'
Non-Graded, Recorded Investment	17,877,000	'	17,406,000	17,405,000	'	'
Commercial [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	26,655,000	'	66,282,000	65,917,000	'	'
Commercial [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	19,475,000	'	24,403,000	21,689,000	'	'
Non-Graded, Recorded Investment	47,000	'	64,000	73,000	'	'
Energy [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	2,311,991,000	'	2,460,659,000	2,416,877,000	'	'
Energy [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,305,225,000	'	2,448,954,000	2,403,364,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Energy [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	4,813,000	'	9,245,000	10,450,000	'	'
Energy [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	1,953,000	'	2,460,000	3,063,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Services [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	2,148,551,000	'	2,164,186,000	1,967,568,000	'	'
Services [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,130,169,000	'	2,119,734,000	1,923,017,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Services [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	11,455,000	'	32,362,000	34,452,000	'	'
Services [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	6,927,000	'	12,090,000	10,099,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Wholesale/retail [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	1,181,806,000	'	1,106,439,000	1,060,061,000	'	'
Wholesale/retail [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	1,171,923,000	'	1,093,413,000	1,053,813,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Wholesale/retail [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,660,000	'	9,949,000	4,241,000	'	'
Wholesale/retail [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	7,223,000	'	3,077,000	2,007,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Manufacturing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	382,460,000	'	348,484,000	343,360,000	'	'
Manufacturing [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	378,723,000	'	337,132,000	330,608,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Manufacturing [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,894,000	'	9,345,000	10,469,000	'	'
Manufacturing [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	843,000	'	2,007,000	2,283,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Healthcare [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	1,160,212,000	'	1,081,406,000	1,022,851,000	'	'
Healthcare [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	1,158,436,000	'	1,077,773,000	1,019,362,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Healthcare [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	43,000	'	467,000	184,000	'	'
Healthcare [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	1,733,000	'	3,166,000	3,305,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Integrated food services [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	141,440,000	'	191,106,000	200,453,000	'	'
Integrated food services [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	136,650,000	'	190,422,000	199,769,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Integrated food services [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	4,790,000	'	0	684,000	'	'
Integrated food services [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	684,000	0	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Other commercial and industrial [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	244,615,000	'	289,632,000	255,737,000	'	'
Other commercial and industrial [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	225,895,000	'	266,329,000	231,890,000	'	'
Non-Graded, Recorded Investment	17,877,000	'	17,406,000	17,405,000	'	'
Other commercial and industrial [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	4,914,000	5,437,000	'	'
Other commercial and industrial [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	796,000	'	919,000	932,000	'	'
Non-Graded, Recorded Investment	47,000	'	64,000	73,000	'	'
Commercial Real Estate [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,349,229,000	'	2,228,999,000	2,177,235,000	'	'
Non-Graded, Recorded Investment	0	'	0	37,000	'	'
Total	2,349,229,000	'	2,228,999,000	2,177,272,000	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	45,062,000	'	54,884,000	60,704,000	'	'
Non-Graded, Allowance	0	'	0	0	'	'
Allowance For Financing Receivable Total	45,062,000	'	54,884,000	60,704,000	'	'
Commercial Real Estate [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,253,925,000	'	2,105,105,000	2,030,764,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Commercial Real Estate [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	42,802,000	'	63,268,000	70,747,000	'	'
Commercial Real Estate [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	52,502,000	'	60,626,000	75,724,000	'	'
Non-Graded, Recorded Investment	0	'	0	37,000	'	'
Construction and land development [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	216,456,000	'	253,093,000	293,733,000	'	'
Construction and land development [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	178,278,000	'	204,010,000	230,022,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Construction and land development [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	17,394,000	'	22,952,000	25,568,000	'	'
Construction and land development [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	20,784,000	'	26,131,000	38,143,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Retail [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	556,918,000	'	522,786,000	535,456,000	'	'
Retail [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	548,197,000	'	508,342,000	520,568,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Retail [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	807,000	'	6,327,000	8,196,000	'	'
Retail [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	7,914,000	'	8,117,000	6,692,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Office [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	422,043,000	'	427,872,000	414,246,000	'	'
Office [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	413,083,000	'	405,763,000	391,859,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Office [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	2,122,000	'	15,280,000	12,554,000	'	'
Office [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	6,838,000	'	6,829,000	9,833,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Multifamily [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	520,454,000	'	402,896,000	393,129,000	'	'
Multifamily [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	504,548,000	'	393,566,000	383,317,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Multifamily [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	11,556,000	'	6,624,000	6,667,000	'	'
Multifamily [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	4,350,000	'	2,706,000	3,145,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Industrial [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	245,022,000	'	245,994,000	183,846,000	'	'
Industrial [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	244,768,000	'	241,761,000	175,339,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Industrial [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	254,000	'	265,000	4,443,000	'	'
Industrial [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	3,968,000	4,064,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Other commercial real estate [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	388,336,000	'	376,358,000	356,862,000	'	'
Other commercial real estate [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	365,051,000	'	351,663,000	329,659,000	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Other commercial real estate [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	10,669,000	'	11,820,000	13,319,000	'	'
Other commercial real estate [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	12,616,000	'	12,875,000	13,847,000	'	'
Non-Graded, Recorded Investment	0	'	0	37,000	'	'
Residential Mortgage [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	236,399,000	'	265,503,000	275,490,000	'	'
Non-Graded, Recorded Investment	1,798,366,000	'	1,779,537,000	1,740,813,000	'	'
Total	2,034,765,000	'	2,045,040,000	2,016,303,000	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	3,764,000	'	5,270,000	6,416,000	'	'
Non-Graded, Allowance	34,533,000	'	36,433,000	34,600,000	'	'
Allowance For Financing Receivable Total	38,297,000	'	41,703,000	41,016,000	'	'
Residential Mortgage [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	226,325,000	'	242,823,000	253,859,000	'	'
Non-Graded, Recorded Investment	1,764,551,000	'	1,745,338,000	1,721,401,000	'	'
Residential Mortgage [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	4,633,000	'	10,271,000	11,776,000	'	'
Residential Mortgage [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	5,441,000	'	12,409,000	9,855,000	'	'
Non-Graded, Recorded Investment	33,815,000	'	34,199,000	19,412,000	'	'
Permanent mortage [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	1,078,661,000	'	1,123,965,000	1,138,960,000	'	'
Permanent mortage [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	222,630,000	'	242,823,000	253,859,000	'	'
Non-Graded, Recorded Investment	819,601,000	'	831,008,000	850,118,000	'	'
Permanent mortage [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	4,633,000	'	10,271,000	11,776,000	'	'
Permanent mortage [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	5,441,000	'	12,409,000	9,855,000	'	'
Non-Graded, Recorded Investment	26,356,000	'	27,454,000	13,352,000	'	'
Permanent mortgages guaranteed by US govenment agencies [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	163,919,000	'	160,444,000	162,271,000	'	'
Permanent mortgages guaranteed by US govenment agencies [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Non-Graded, Recorded Investment	163,342,000	'	159,955,000	161,761,000	'	'
Permanent mortgages guaranteed by US govenment agencies [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Permanent mortgages guaranteed by US govenment agencies [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Non-Graded, Recorded Investment	577,000	'	489,000	510,000	'	'
Home equity {Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	792,185,000	'	760,631,000	715,072,000	'	'
Home equity {Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	3,695,000	'	0	0	'	'
Non-Graded, Recorded Investment	781,608,000	'	754,375,000	709,522,000	'	'
Home equity {Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Home equity {Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Non-Graded, Recorded Investment	6,882,000	'	6,256,000	5,550,000	'	'
Consumer [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	268,690,000	'	231,376,000	202,897,000	'	'
Non-Graded, Recorded Investment	126,341,000	'	164,129,000	168,988,000	'	'
Total	395,031,000	'	395,505,000	371,885,000	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	2,797,000	'	2,987,000	2,711,000	'	'
Non-Graded, Allowance	5,507,000	'	6,466,000	6,632,000	'	'
Allowance For Financing Receivable Total	8,304,000	'	9,453,000	9,343,000	'	'
Consumer [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	267,564,000	'	229,570,000	198,419,000	'	'
Non-Graded, Recorded Investment	124,997,000	'	162,135,000	166,694,000	'	'
Consumer [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	846,000	'	1,091,000	1,663,000	'	'
Consumer [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	280,000	'	715,000	2,815,000	'	'
Non-Graded, Recorded Investment	1,344,000	'	1,994,000	2,294,000	'	'
Indirect automobile [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	10,757,000	'	34,735,000	47,281,000	'	'
Indirect automobile [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Non-Graded, Recorded Investment	9,800,000	'	33,157,000	45,349,000	'	'
Indirect automobile [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Indirect automobile [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Non-Graded, Recorded Investment	957,000	'	1,578,000	1,932,000	'	'
Other consumer [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Total	384,274,000	'	360,770,000	324,604,000	'	'
Other consumer [Member] | Performing [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	267,564,000	'	229,570,000	198,419,000	'	'
Non-Graded, Recorded Investment	115,197,000	'	128,978,000	121,345,000	'	'
Other consumer [Member] | Potential Problem [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	846,000	'	1,091,000	1,663,000	'	'
Other consumer [Member] | Nonaccrual [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	280,000	'	715,000	2,815,000	'	'
Non-Graded, Recorded Investment	387,000	'	416,000	362,000	'	'
Specific Allowance [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	10,407,469,000	'	10,350,320,000	9,905,051,000	'	'
Non-Graded, Recorded Investment	1,942,631,000	'	1,961,136,000	1,927,316,000	'	'
Total	12,350,100,000	'	12,311,456,000	11,832,367,000	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	112,193,000	'	127,322,000	150,507,000	'	'
Non-Graded, Allowance	41,250,000	'	43,998,000	42,335,000	'	'
Allowance For Financing Receivable Total	153,443,000	'	171,320,000	192,842,000	'	'
Nonspecific Allowance [Member]	'	'	'	'	'	'
Recorded Investment [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Recorded Investment	0	'	0	0	'	'
Non-Graded, Recorded Investment	0	'	0	0	'	'
Total	0	'	0	0	'	'
Related Allowance [Abstract]	'	'	'	'	'	'
Internally Risk Graded, Allowance	0	'	0	0	'	'
Non-Graded, Allowance	0	'	0	0	'	'
Allowance For Financing Receivable Total	$40,882,000	$42,449,000	$44,187,000	$40,914,000	$40,858,000	$46,350,000

Loans_and_Allowances_for_Credi4

Loans and Allowances for Credit Losses Part 4 (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	$315,630		$370,276		$315,630		$370,276		$360,258
Impaired loans, recorded investment, total	276,246		293,660		276,246		293,660		294,365
Impaired loans, recorded investment with no related allowance	273,762		284,610		273,762		284,610		283,039
Impaired loans, recorded investment with related allowance	2,484		9,050		2,484		9,050		11,326
Impaired loans, related allowance	1,274		3,667		1,274		3,667		4,233
Impaired loans, average recorded investment	279,690		301,803		285,464		344,884		'
Impaired loans, interest income recognized	2,261		2,078		6,272		6,232		'
Commercial [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	34,247		43,894		34,247		43,894		43,230
Impaired loans, recorded investment, total	19,522		21,762		19,522		21,762		24,467
Impaired loans, recorded investment with no related allowance	18,301		20,425		18,301		20,425		23,140
Impaired loans, recorded investment with related allowance	1,221		1,337		1,221		1,337		1,327
Impaired loans, related allowance	572		204		572		204		230
Impaired loans, average recorded investment	20,198		28,147		21,996		45,289		'
Impaired loans, interest income recognized	0		0		0		0		'
Energy [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	1,954		3,273		1,954		3,273		2,460
Impaired loans, recorded investment, total	1,953		3,063		1,953		3,063		2,460
Impaired loans, recorded investment with no related allowance	1,953		3,063		1,953		3,063		2,460
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	2,115		3,075		2,207		1,700		'
Impaired loans, interest income recognized	0		0		0		0		'
Services [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	9,105		13,135		9,105		13,135		15,715
Impaired loans, recorded investment, total	6,927		10,099		6,927		10,099		12,090
Impaired loans, recorded investment with no related allowance	5,789		9,978		5,789		9,978		11,940
Impaired loans, recorded investment with related allowance	1,138		121		1,138		121		150
Impaired loans, related allowance	515		120		515		120		149
Impaired loans, average recorded investment	7,188		10,111		9,509		13,534		'
Impaired loans, interest income recognized	0		0		0		0		'
Wholesale/retail [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	11,262		8,039		11,262		8,039		9,186
Impaired loans, recorded investment, total	7,223		2,007		7,223		2,007		3,077
Impaired loans, recorded investment with no related allowance	7,188		1,937		7,188		1,937		3,016
Impaired loans, recorded investment with related allowance	35		70		35		70		61
Impaired loans, related allowance	9		18		9		18		15
Impaired loans, average recorded investment	6,962		3,091		5,150		11,594		'
Impaired loans, interest income recognized	0		0		0		0		'
Healthcare [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	2,340		4,395		2,340		4,395		4,256
Impaired loans, recorded investment, total	1,733		3,305		1,733		3,305		3,166
Impaired loans, recorded investment with no related allowance	1,685		2,159		1,685		2,159		2,050
Impaired loans, recorded investment with related allowance	48		1,146		48		1,146		1,116
Impaired loans, related allowance	48		66		48		66		66
Impaired loans, average recorded investment	2,202		3,308		2,450		4,396		'
Impaired loans, interest income recognized	0		0		0		0		'
Manufacturing [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	1,051		6,548		1,051		6,548		2,447
Impaired loans, recorded investment, total	843		2,283		843		2,283		2,007
Impaired loans, recorded investment with no related allowance	843		2,283		843		2,283		2,007
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	860		7,257		1,425		12,667		'
Impaired loans, interest income recognized	0		0		0		0		'
Integrated food services [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	0		0		0		0		684
Impaired loans, recorded investment, total	0		0		0		0		684
Impaired loans, recorded investment with no related allowance	0		0		0		0		684
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	0		0		342		0		'
Impaired loans, interest income recognized	0		0		0		0		'
Other commercial and industrial [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	8,535		8,504		8,535		8,504		8,482
Impaired loans, recorded investment, total	843		1,005		843		1,005		983
Impaired loans, recorded investment with no related allowance	843		1,005		843		1,005		983
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	871		1,305		913		1,398		'
Impaired loans, interest income recognized	0		0		0		0		'
Commercial Real Estate [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	61,072		112,991		61,072		112,991		86,001
Impaired loans, recorded investment, total	52,502		75,761		52,502		75,761		60,626
Impaired loans, recorded investment with no related allowance	51,509		68,478		51,509		68,478		53,051
Impaired loans, recorded investment with related allowance	993		7,283		993		7,283		7,575
Impaired loans, related allowance	488		3,117		488		3,117		3,109
Impaired loans, average recorded investment	55,599		77,988		56,566		87,478		'
Impaired loans, interest income recognized	0		0		0		0		'
Construction and land development [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	24,219		67,087		24,219		67,087		44,721
Impaired loans, recorded investment, total	20,784		38,143		20,784		38,143		26,131
Impaired loans, recorded investment with no related allowance	20,395		37,579		20,395		37,579		25,575
Impaired loans, recorded investment with related allowance	389		564		389		564		556
Impaired loans, related allowance	148		155		148		155		155
Impaired loans, average recorded investment	20,960		42,097		23,458		50,009		'
Impaired loans, interest income recognized	0		0		0		0		'
Retail [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	9,380		8,372		9,380		8,372		9,797
Impaired loans, recorded investment, total	7,914		6,692		7,914		6,692		8,117
Impaired loans, recorded investment with no related allowance	7,914		6,692		7,914		6,692		8,117
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	8,160		7,300		8,016		6,778		'
Impaired loans, interest income recognized	0		0		0		0		'
Office [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	8,254		13,736		8,254		13,736		8,949
Impaired loans, recorded investment, total	6,838		9,833		6,838		9,833		6,829
Impaired loans, recorded investment with no related allowance	6,830		9,608		6,830		9,608		6,604
Impaired loans, recorded investment with related allowance	8		225		8		225		225
Impaired loans, related allowance	8		21		8		21		21
Impaired loans, average recorded investment	7,333		10,211		6,834		10,645		'
Impaired loans, interest income recognized	0		0		0		0		'
Multifamily [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	4,351		3,259		4,351		3,259		3,189
Impaired loans, recorded investment, total	4,350		3,145		4,350		3,145		2,706
Impaired loans, recorded investment with no related allowance	4,350		3,145		4,350		3,145		2,706
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	5,399		3,182		3,528		3,329		'
Impaired loans, interest income recognized	0		0		0		0		'
Industrial [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	0		4,064		0		4,064		3,968
Impaired loans, recorded investment, total	0		4,064		0		4,064		3,968
Impaired loans, recorded investment with no related allowance	0		0		0		0		0
Impaired loans, recorded investment with related allowance	0		4,064		0		4,064		3,968
Impaired loans, related allowance	0		2,290		0		2,290		2,290
Impaired loans, average recorded investment	0		2,032		1,984		2,032		'
Impaired loans, interest income recognized	0		0		0		0		'
Other commercial real estate [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	14,868		16,473		14,868		16,473		15,377
Impaired loans, recorded investment, total	12,616		13,884		12,616		13,884		12,875
Impaired loans, recorded investment with no related allowance	12,020		11,454		12,020		11,454		10,049
Impaired loans, recorded investment with related allowance	596		2,430		596		2,430		2,826
Impaired loans, related allowance	332		651		332		651		643
Impaired loans, average recorded investment	13,747		13,166		12,746		14,685		'
Impaired loans, interest income recognized	0		0		0		0		'
Residential Mortgage [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	218,674		206,240		218,674		206,240		228,149
Impaired loans, recorded investment, total	202,598		191,028		202,598		191,028		206,563
Impaired loans, recorded investment with no related allowance	202,328		190,727		202,328		190,727		204,264
Impaired loans, recorded investment with related allowance	270		301		270		301		2,299
Impaired loans, related allowance	214		217		214		217		769
Impaired loans, average recorded investment	202,062		189,606		204,735		207,805		'
Impaired loans, interest income recognized	2,261		2,078		6,272		6,232		'
Permanent mortage [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	39,648		31,068		39,648		31,068		51,153
Impaired loans, recorded investment, total	31,797		23,207		31,797		23,207		39,863
Impaired loans, recorded investment with no related allowance	31,527		22,906		31,527		22,906		37,564
Impaired loans, recorded investment with related allowance	270		301		270		301		2,299
Impaired loans, related allowance	214		217		214		217		769
Impaired loans, average recorded investment	32,272		20,672		35,829		24,287		'
Impaired loans, interest income recognized	539		398		1,142		1,193		'
Permanent mortgages guaranteed by US govenment agencies [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	171,935	[1]	169,622	[2]	171,935	[1]	169,622	[2]	170,740	[3]
Impaired loans, recorded investment, total	163,919	[1]	162,271	[2]	163,919	[1]	162,271	[2]	160,444	[3]
Impaired loans, recorded investment with no related allowance	163,919	[1]	162,271	[2]	163,919	[1]	162,271	[2]	160,444	[3]
Impaired loans, recorded investment with related allowance	0	[1]	0	[2]	0	[1]	0	[2]	0	[3]
Impaired loans, related allowance	0	[1]	0	[2]	0	[1]	0	[2]	0	[3]
Impaired loans, average recorded investment	162,497	[1]	163,863	[2]	162,337	[1]	178,542	[2]	'
Impaired loans, interest income recognized	1,722	[1]	1,680	[2]	5,130	[1]	5,039	[2]	'
Home equity {Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	7,091		5,550		7,091		5,550		6,256
Impaired loans, recorded investment, total	6,882		5,550		6,882		5,550		6,256
Impaired loans, recorded investment with no related allowance	6,882		5,550		6,882		5,550		6,256
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	7,293		5,071		6,569		4,976		'
Impaired loans, interest income recognized	0		0		0		0		'
Consumer [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	1,637		7,151		1,637		7,151		2,878
Impaired loans, recorded investment, total	1,624		5,109		1,624		5,109		2,709
Impaired loans, recorded investment with no related allowance	1,624		4,980		1,624		4,980		2,584
Impaired loans, recorded investment with related allowance	0		129		0		129		125
Impaired loans, related allowance	0		129		0		129		125
Impaired loans, average recorded investment	1,831		6,062		2,167		4,312		'
Impaired loans, interest income recognized	0		0		0		0		'
Indirect automobile [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	960		1,932		960		1,932		1,578
Impaired loans, recorded investment, total	957		1,932		957		1,932		1,578
Impaired loans, recorded investment with no related allowance	957		1,932		957		1,932		1,578
Impaired loans, recorded investment with related allowance	0		0		0		0		0
Impaired loans, related allowance	0		0		0		0		0
Impaired loans, average recorded investment	1,073		2,095		1,268		2,063		'
Impaired loans, interest income recognized	0		0		0		0		'
Other consumer [Member]	'		'		'		'		'
Impaired loans [Abstract]	'		'		'		'		'
Impaired loans, unpaid principal balance	677		5,219		677		5,219		1,300
Impaired loans, recorded investment, total	667		3,177		667		3,177		1,131
Impaired loans, recorded investment with no related allowance	667		3,048		667		3,048		1,006
Impaired loans, recorded investment with related allowance	0		129		0		129		125
Impaired loans, related allowance	0		129		0		129		125
Impaired loans, average recorded investment	758		3,967		899		2,249		'
Impaired loans, interest income recognized	$0		$0		$0		$0		'
[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 September 30, 2013, $577 thousand of these loans were nonaccruing and $163 million were accruing based on the guarantee by U.S. government agencies.
[2]	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 September 30, 2012, $510 thousand of these loans were nonaccruing and $162 million were accruing based on the guarantee by U.S. government agencies.
[3]	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 were nonaccruing and $160 million were accruing based on the guarantee by U.S. government agencies.

Loans_and_Allowances_for_Credi5

Loans and Allowances for Credit Losses Part 5 (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	$109,335	$72,571	$109,335	$72,571	$97,985
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	40,198	36,395	40,198	36,395	48,126
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	69,137	36,176	69,137	36,176	49,859
Troubled Debt Restructuring, Specific allowance	420	291	420	291	273
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	290	2,564	1,492	7,392	'
Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	59,236	44,579	59,236	44,579	59,470
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	28,223	26,486	28,223	26,486	39,371
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	31,013	18,093	31,013	18,093	20,099
Troubled Debt Restructuring, Specific allowance	420	291	420	291	273
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	290	2,564	1,492	7,309	'
Accruing [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	50,099	27,992	50,099	27,992	38,515
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	11,975	9,909	11,975	9,909	8,755
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	38,124	18,083	38,124	18,083	29,760
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	83	'
Commercial [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	5,234	4,901	5,234	4,901	5,521
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,445	3,566	1,445	3,566	3,525
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	3,789	1,335	3,789	1,335	1,996
Troubled Debt Restructuring, Specific allowance	259	18	259	18	60
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	154	0	154	0	'
Energy [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	0	0	0	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Services [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	3,791	2,594	3,791	2,594	2,492
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,274	2,109	1,274	2,109	2,099
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	2,517	485	2,517	485	393
Troubled Debt Restructuring, Specific allowance	250	0	250	0	45
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Wholesale/retail [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	275	1,557	275	1,557	2,290
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	141	1,385	141	1,385	1,362
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	134	172	134	172	928
Troubled Debt Restructuring, Specific allowance	9	18	9	18	15
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Manufacturing [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	396	0	396	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	396	0	396	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	154	0	154	0	'
Healthcare [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	0	72	0	72	64
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	72	0	72	64
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Integrated food services [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	0	0	0	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Other commercial and industrial [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	772	678	772	678	675
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	30	0	30	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	742	678	742	678	675
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Commercial Real Estate [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	31,613	30,540	31,613	30,540	30,599
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	12,956	18,232	12,956	18,232	21,043
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	18,657	12,308	18,657	12,308	9,556
Troubled Debt Restructuring, Specific allowance	148	131	148	131	76
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	1,219	758	5,940	'
Construction and land development [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	10,673	18,406	10,673	18,406	14,898
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,776	9,842	1,776	9,842	9,989
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	8,897	8,564	8,897	8,564	4,909
Troubled Debt Restructuring, Specific allowance	148	76	148	76	76
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	982	54	3,252	'
Retail [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	6,030	3,448	6,030	3,448	6,785
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	2,032	3,448	2,032	3,448	5,735
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	3,998	0	3,998	0	1,050
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	150	627	150	'
Office [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	5,448	3,376	5,448	3,376	3,899
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,294	1,368	1,294	1,368	1,920
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	4,154	2,008	4,154	2,008	1,979
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	77	269	'
Multifamily [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	980	0	980	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	980	0	980	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Industrial [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	0	0	0	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	0	0	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Other commercial real estate [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	8,482	5,310	8,482	5,310	5,017
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	6,874	3,574	6,874	3,574	3,399
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	1,608	1,736	1,608	1,736	1,618
Troubled Debt Restructuring, Specific allowance	0	55	0	55	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	87	0	2,269	'
Residential Mortgage [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	21,101	6,925	21,101	6,925	20,490
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	12,798	4,245	12,798	4,245	12,214
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	8,303	2,680	8,303	2,680	8,276
Troubled Debt Restructuring, Specific allowance	13	54	13	54	54
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	134	0	577	24	'
Permanent mortage [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	17,319	6,925	17,319	6,925	20,490
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	9,579	4,245	9,579	4,245	12,214
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	7,740	2,680	7,740	2,680	8,276
Troubled Debt Restructuring, Specific allowance	13	54	13	54	54
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	73	0	450	24	'
Permanent mortage [Member] | Accruing [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	0	3,402	0	3,402	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	0	2,225	0	2,225	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	0	1,177	0	1,177	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	83	'
Permanent mortgages guaranteed by US govenment agencies [Member] | Accruing [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	50,099	24,590	50,099	24,590	38,515
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	11,975	7,684	11,975	7,684	8,755
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	38,124	16,906	38,124	16,906	29,760
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	0	0	'
Home equity {Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	3,782	0	3,782	0	0
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	3,219	0	3,219	0	0
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	563	0	563	0	0
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	61	0	127	0	'
Consumer [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	1,288	2,213	1,288	2,213	2,860
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	1,024	443	1,024	443	2,589
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	264	1,770	264	1,770	271
Troubled Debt Restructuring, Specific allowance	0	88	0	88	83
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	2	1,345	3	1,345	'
Indirect automobile [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	817	0	817	0	532
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	737	0	737	0	492
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	80	0	80	0	40
Troubled Debt Restructuring, Specific allowance	0	0	0	0	0
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	0	0	1	0	'
Other consumer [Member] | Nonaccrual [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Troubled Debt Restructuring, Recorded Investment	471	2,213	471	2,213	2,328
Troubled Debt Restructuring, Performing in Accordance With Modified Terms	287	443	287	443	2,097
Troubled Debt Restructuring, Not Performing in Accordance With Modified Terms	184	1,770	184	1,770	231
Troubled Debt Restructuring, Specific allowance	0	88	0	88	83
Financing Receivables, Impaired, Troubled Debt Restructuring, Charge-offs	$2	$1,345	$2	$1,345	'

Loans_and_Allowances_for_Credi6

Loans and Allowances for Credit Losses Part 6 (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	$7,448	$8,521	$35,371	$21,745
Troubled Debt Restructurings, Recorded Balance With Payment Default	30,295	7,120	40,278	11,575
Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	4,863	961	19,406	4,616
Troubled Debt Restructurings, Recorded Balance With Payment Default	22,359	4,097	26,636	4,786
Accruing [Member] | Payment Stream Modification [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,971	0	9,817	0
Accruing [Member] | Combination & Other Modifications [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,892	961	9,589	4,616
Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	2,585	7,560	15,965	17,129
Troubled Debt Restructurings, Recorded Balance With Payment Default	7,936	3,023	13,642	6,789
Nonaccrual [Member] | Interest Rate Modification [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	610	962	836	6,373
Nonaccrual [Member] | Payment Stream Modification [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,122	6,598	11,012	8,273
Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	853	0	4,117	2,483
Commercial [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,234	875	2,502	1,017
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,879	70	2,512	70
Commercial [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Commercial [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	0	0	0
Commercial [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	0	0
Commercial [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	1,234	875	2,502	1,017
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,879	70	2,512	70
Commercial [Member] | Nonaccrual [Member] | Interest Rate Modification [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	610	875	755	875
Commercial [Member] | Nonaccrual [Member] | Payment Stream Modification [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	624	0	1,747	70
Commercial [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	0	72
Energy [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Energy [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	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	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	0	0
Services [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	838	875	1,961	945
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,338	70	1,948	70
Services [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Services [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	838	875	1,961	945
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,338	70	1,948	70
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	610	875	610	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	228	0	1,351	70
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	0	0
Wholesale/retail [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Wholesale/retail [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
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	0	0	0
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	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	0	0
Manufacturing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	396	0	396	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	396	0	396	0
Manufacturing [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Manufacturing [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	396	0	396	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	396	0	396	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	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	396	0	396	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	0	0
Healthcare [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	72
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Healthcare [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Healthcare [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	72
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	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	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	0	0	72
Integrated food services [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	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	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	0	0
Other commercial and industrial [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	145	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	145	0	168	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	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	0	0	145	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	145	0	168	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	0	0	145	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	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	0	0	0	0
Commercial Real Estate [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	498	6,598	9,133	13,249
Troubled Debt Restructurings, Recorded Balance With Payment Default	4,540	1,183	9,390	4,949
Commercial Real Estate [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	498	6,598	9,133	13,249
Troubled Debt Restructurings, Recorded Balance With Payment Default	4,540	1,183	9,390	4,949
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	0	5,046
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	498	6,598	9,133	8,203
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	0	0
Construction and land development [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	6,598	0	7,878
Troubled Debt Restructurings, Recorded Balance With Payment Default	257	1,183	257	1,183
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	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
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	0	0	0
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	0	0
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	6,598	0	7,878
Troubled Debt Restructurings, Recorded Balance With Payment Default	257	1,183	257	1,183
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	0	0	1,280
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	6,598	0	6,598
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	0	0
Retail [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	498	0	1,110	2,398
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,110	0	1,110	2,398
Retail [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Retail [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	498	0	1,110	2,398
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,110	0	1,110	2,398
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	0	0	2,398
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	498	0	1,110	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	0	0
Office [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	3,173	1,368
Troubled Debt Restructurings, Recorded Balance With Payment Default	3,173	0	3,173	1,368
Office [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Office [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	3,173	1,368
Troubled Debt Restructurings, Recorded Balance With Payment Default	3,173	0	3,173	1,368
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	0	0	1,368
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	0	0	3,173	0
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	0	0
Multifamily [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	980	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	980	0
Multifamily [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	980	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	980	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	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	980	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	0	0
Industrial [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Industrial [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	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	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	0	0
Other commercial real estate [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	3,870	1,605
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	3,870	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	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	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	0	0	3,870	1,605
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	3,870	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	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	0	0	3,870	1,605
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	0	0
Residential Mortgage [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	5,600	961	22,892	5,397
Troubled Debt Restructurings, Recorded Balance With Payment Default	23,742	4,097	28,207	4,786
Residential Mortgage [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	4,863	961	19,406	4,616
Troubled Debt Restructurings, Recorded Balance With Payment Default	22,359	4,097	26,636	4,786
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	1,971	0	9,817	0
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	2,892	961	9,589	4,616
Residential Mortgage [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	737	0	3,486	781
Troubled Debt Restructurings, Recorded Balance With Payment Default	1,383	0	1,571	0
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	0	0	0
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	0	0	132	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	737	0	3,354	781
Permanent mortage [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	222	0	996	932
Troubled Debt Restructurings, Recorded Balance With Payment Default	820	151	941	151
Permanent mortage [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	151
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	151	0	151
Permanent mortage [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	0	0	0
Permanent mortage [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	0	151
Permanent mortage [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	222	0	996	781
Troubled Debt Restructurings, Recorded Balance With Payment Default	820	0	941	0
Permanent mortage [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	0	0
Permanent mortage [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	132	0
Permanent mortage [Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	222	0	864	781
Permanent mortgages guaranteed by US govenment agencies [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	4,863	961	19,406	4,465
Troubled Debt Restructurings, Recorded Balance With Payment Default	22,359	3,946	26,636	4,635
Permanent mortgages guaranteed by US govenment agencies [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	4,863	961	19,406	4,465
Troubled Debt Restructurings, Recorded Balance With Payment Default	22,359	3,946	26,636	4,635
Permanent mortgages guaranteed by US govenment 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	1,971	0	9,817	0
Permanent mortgages guaranteed by US govenment 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	2,892	961	9,589	4,465
Permanent mortgages guaranteed by US govenment agencies [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Permanent mortgages guaranteed by US govenment 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	0	0
Permanent mortgages guaranteed by US govenment 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	0	0
Permanent mortgages guaranteed by US govenment 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	0	0
Home equity {Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	515	0	2,490	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	563	0	630	0
Home equity {Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
Home equity {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	0	0	0
Home equity {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	0	0
Home equity {Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	515	0	2,490	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	563	0	630	0
Home equity {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	0	0
Home equity {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	0	0
Home equity {Member] | Nonaccrual [Member] | Combination & Other Modifications [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	515	0	2,490	0
Consumer [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	116	87	844	2,082
Troubled Debt Restructurings, Recorded Balance With Payment Default	134	1,770	169	1,770
Consumer [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	0	0
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	0	0	0
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	0	0
Consumer [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	116	87	844	2,082
Troubled Debt Restructurings, Recorded Balance With Payment Default	134	1,770	169	1,770
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	0	87	81	452
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	0	0
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	116	0	763	1,630
Indirect automobile [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	58	0	633	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	81	0	116	0
Indirect automobile [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Indirect automobile [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	58	0	633	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	81	0	116	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	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	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	58	0	633	0
Other consumer [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	58	87	211	2,082
Troubled Debt Restructurings, Recorded Balance With Payment Default	53	1,770	53	1,770
Other consumer [Member] | Accruing [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	0	0	0	0
Troubled Debt Restructurings, Recorded Balance With Payment Default	0	0	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	0	0	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	0	0
Other consumer [Member] | Nonaccrual [Member]	'	'	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'	'	'
Troubled Debt Restructurings, Recorded Balance Modified During The Period	58	87	211	2,082
Troubled Debt Restructurings, Recorded Balance With Payment Default	53	1,770	53	1,770
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	0	87	81	452
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	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	$58	$0	$130	$1,630

Loans_and_Allowances_for_Credi7

Loans and Allowances for Credit Losses Part 7 (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	$12,079,201,000	$12,014,834,000	$11,503,763,000
Past due 30 to 89 days	34,089,000	37,938,000	70,178,000
Past due 90 days or more	123,906,000	124,274,000	126,527,000
Nonaccrual	112,904,000	134,410,000	131,899,000
Total	12,350,100,000	12,311,456,000	11,832,367,000
Commercial [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	7,547,586,000	7,611,023,000	7,231,366,000
Past due 30 to 89 days	3,882,000	5,994,000	12,916,000
Past due 90 days or more	85,000	428,000	863,000
Nonaccrual	19,522,000	24,467,000	21,762,000
Total	7,571,075,000	7,641,912,000	7,266,907,000
Energy [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	2,308,639,000	2,454,928,000	2,408,812,000
Past due 30 to 89 days	1,399,000	3,071,000	5,002,000
Past due 90 days or more	0	200,000	0
Nonaccrual	1,953,000	2,460,000	3,063,000
Total	2,311,991,000	2,460,659,000	2,416,877,000
Services [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	2,140,835,000	2,150,386,000	1,956,190,000
Past due 30 to 89 days	704,000	1,710,000	741,000
Past due 90 days or more	85,000	0	538,000
Nonaccrual	6,927,000	12,090,000	10,099,000
Total	2,148,551,000	2,164,186,000	1,967,568,000
Wholesale/retail [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	1,173,628,000	1,103,307,000	1,056,730,000
Past due 30 to 89 days	955,000	5,000	1,324,000
Past due 90 days or more	0	50,000	0
Nonaccrual	7,223,000	3,077,000	2,007,000
Total	1,181,806,000	1,106,439,000	1,060,061,000
Manufacturing [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	381,048,000	346,442,000	340,243,000
Past due 30 to 89 days	569,000	35,000	834,000
Past due 90 days or more	0	0	0
Nonaccrual	843,000	2,007,000	2,283,000
Total	382,460,000	348,484,000	343,360,000
Healthcare [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	1,158,340,000	1,077,022,000	1,014,771,000
Past due 30 to 89 days	139,000	1,040,000	4,775,000
Past due 90 days or more	0	178,000	0
Nonaccrual	1,733,000	3,166,000	3,305,000
Total	1,160,212,000	1,081,406,000	1,022,851,000
Integrated food services [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	141,440,000	190,416,000	200,453,000
Past due 30 to 89 days	0	6,000	0
Past due 90 days or more	0	0	0
Nonaccrual	0	684,000	0
Total	141,440,000	191,106,000	200,453,000
Other commercial and industrial [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	243,656,000	288,522,000	254,167,000
Past due 30 to 89 days	116,000	127,000	240,000
Past due 90 days or more	0	0	325,000
Nonaccrual	843,000	983,000	1,005,000
Total	244,615,000	289,632,000	255,737,000
Commercial Real Estate [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	2,295,456,000	2,159,287,000	2,085,363,000
Past due 30 to 89 days	1,271,000	5,657,000	16,112,000
Past due 90 days or more	0	3,429,000	36,000
Nonaccrual	52,502,000	60,626,000	75,761,000
Total	2,349,229,000	2,228,999,000	2,177,272,000
Construction and land development [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	195,672,000	226,962,000	245,258,000
Past due 30 to 89 days	0	0	10,297,000
Past due 90 days or more	0	0	35,000
Nonaccrual	20,784,000	26,131,000	38,143,000
Total	216,456,000	253,093,000	293,733,000
Retail [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	548,810,000	514,252,000	528,396,000
Past due 30 to 89 days	194,000	349,000	368,000
Past due 90 days or more	0	68,000	0
Nonaccrual	7,914,000	8,117,000	6,692,000
Total	556,918,000	522,786,000	535,456,000
Office [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	415,205,000	417,866,000	403,223,000
Past due 30 to 89 days	0	3,177,000	1,190,000
Past due 90 days or more	0	0	0
Nonaccrual	6,838,000	6,829,000	9,833,000
Total	422,043,000	427,872,000	414,246,000
Multifamily [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	516,104,000	400,151,000	389,949,000
Past due 30 to 89 days	0	39,000	35,000
Past due 90 days or more	0	0	0
Nonaccrual	4,350,000	2,706,000	3,145,000
Total	520,454,000	402,896,000	393,129,000
Industrial [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	244,415,000	242,026,000	177,951,000
Past due 30 to 89 days	607,000	0	1,831,000
Past due 90 days or more	0	0	0
Nonaccrual	0	3,968,000	4,064,000
Total	245,022,000	245,994,000	183,846,000
Other commercial real estate [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	375,250,000	358,030,000	340,586,000
Past due 30 to 89 days	470,000	2,092,000	2,391,000
Past due 90 days or more	0	3,361,000	1,000
Nonaccrual	12,616,000	12,875,000	13,884,000
Total	388,336,000	376,358,000	356,862,000
Residential Mortgage [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	1,844,555,000	1,854,347,000	1,823,897,000
Past due 30 to 89 days	27,208,000	23,687,000	37,543,000
Past due 90 days or more	123,746,000	120,398,000	125,596,000
Nonaccrual	39,256,000	46,608,000	29,267,000
Total	2,034,765,000	2,045,040,000	2,016,303,000
Permanent mortage [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	1,040,616,000	1,075,687,000	1,097,550,000
Past due 30 to 89 days	6,248,000	8,366,000	17,953,000
Past due 90 days or more	0	49,000	250,000
Nonaccrual	31,797,000	39,863,000	23,207,000
Total	1,078,661,000	1,123,965,000	1,138,960,000
Permanent mortgages guaranteed by US govenment agencies [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	20,985,000	26,560,000	19,786,000
Past due 30 to 89 days	18,639,000	13,046,000	16,629,000
Past due 90 days or more	123,718,000	120,349,000	125,346,000
Nonaccrual	577,000	489,000	510,000
Total	163,919,000	160,444,000	162,271,000
Home equity {Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	782,954,000	752,100,000	706,561,000
Past due 30 to 89 days	2,321,000	2,275,000	2,961,000
Past due 90 days or more	28,000	0	0
Nonaccrual	6,882,000	6,256,000	5,550,000
Total	792,185,000	760,631,000	715,072,000
Consumer [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	391,604,000	390,177,000	363,137,000
Past due 30 to 89 days	1,728,000	2,600,000	3,607,000
Past due 90 days or more	75,000	19,000	32,000
Nonaccrual	1,624,000	2,709,000	5,109,000
Total	395,031,000	395,505,000	371,885,000
Indirect automobile [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	9,416,000	31,869,000	43,588,000
Past due 30 to 89 days	384,000	1,273,000	1,729,000
Past due 90 days or more	0	15,000	32,000
Nonaccrual	957,000	1,578,000	1,932,000
Total	10,757,000	34,735,000	47,281,000
Other consumer [Member]	'	'	'
Financing receivable, recorded investment, aging [Abstract]	'	'	'
Current	382,188,000	358,308,000	319,549,000
Past due 30 to 89 days	1,344,000	1,327,000	1,878,000
Past due 90 days or more	75,000	4,000	0
Nonaccrual	667,000	1,131,000	3,177,000
Total	$384,274,000	$360,770,000	$324,604,000

Mortgage_Banking_Activities_Co

Mortgage Banking Activities, Components of Loans Held For Sale (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'	'	'
Components of Residential Mortgages Held For Sale Gross, Fair Value	$230,511	$325,102	$230,511	$325,102	$293,762
Number of days for past due loans (in days)	'90 days	'	'90 days	'	'
Mortgage Banking Revenue [Abstract]	'	'	'	'	'
Originating and marketing revenue	12,548	40,357	68,814	93,128	'
Servicing revenue	10,938	9,909	31,244	29,764	'
Mortgage banking revenue	23,486	50,266	100,058	122,892	'
Residential Mortgage Loans Held For Sale Gross [Member]	'	'	'	'	'
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'	'	'
Residential Mortgage Loans Held For Sale Unpaid Principal Balance, Gross	220,800	294,794	220,800	294,794	269,718
Components of Residential Mortgages Held For Sale Gross, Fair Value	228,926	313,927	228,926	313,927	281,935
Number of days for past due loans (in days)	'90 days	'90 days	'90 days	'90 days	'90 days
Residential mortgage loans held for sale, nonperforming	0	0	0	0	0
Credit losses recognized on residential mortgage loans held for sale	'	'	0	0	'
Mortgage Banking Revenue [Abstract]	'	'	'	'	'
Originating and marketing revenue	31,047	40,463	79,045	85,262	'
Residential Mortgage Loan Commitments [Member]	'	'	'	'	'
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'	'	'
Residential Mortgage, Derivatives, Notional	351,196	452,129	351,196	452,129	356,634
Components of Residential Mortgages Held For Sale Gross, Fair Value	10,948	22,319	10,948	22,319	12,733
Minimum Number of Days Outstanding For Residential Mortgage Commitments	'60 days	'60 days	'60 days	'60 days	'60 days
Maximum Number of Days Outstanding For Residential Mortgage Commitments	'90 days	'90 days	'90 days	'90 days	'90 days
Mortgage Banking Revenue [Abstract]	'	'	'	'	'
Originating and marketing revenue	12,668	6,512	-1,774	15,722	'
Forward Sales Contracts [Member]	'	'	'	'	'
Schedule of Residential Mortgage Loans Held For Sale [Line Items]	'	'	'	'	'
Residential Mortgage, Derivatives, Notional	560,069	722,043	560,069	722,043	598,442
Components of Residential Mortgages Held For Sale Gross, Fair Value	-9,363	-11,144	-9,363	-11,144	-906
Minimum Number of Days for Delivery of Forward Sales Contracts	'60 days	'60 days	'60 days	'60 days	'60 days
Maximum Number of Days for Delivery of Forward Sales Contracts	'90 days	'90 days	'90 days	'90 days	'90 days
Mortgage Banking Revenue [Abstract]	'	'	'	'	'
Originating and marketing revenue	($31,167)	($6,618)	($8,457)	($7,856)	'

Mortgage_Banking_Activities_Mo

Mortgage Banking Activities, Mortgage Servicing Rights (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Summary of Mortgage Servicing Rights [Abstract]	'	'	'	'	'	'	'
Number of residential mortgage loans serviced	104,115	97,465	104,115	97,465	98,246	'	'
Outstanding principal balance of residential mortgage loans serviced for others	$13,298,479,000	$11,756,350,000	$13,298,479,000	$11,756,350,000	$11,981,624,000	'	'
Weighted average interest rate (in hundredths)	4.42%	4.85%	4.42%	4.85%	4.71%	'	'
Remaining term (in months)	'292 months	'289 months	'292 months	'289 months	'289 months	'	'
Servicing Asset at Fair Value, Amount [Roll Forward]	'	'	'	'	'	'	'
Beginning balance	'	'	100,812,000	86,783,000	86,783,000	132,889,000	91,783,000
Additions, net	13,225,000	12,107,000	39,157,000	29,754,000	'	'	'
Change in fair value due to loan runoff	-4,905,000	-4,661,000	-15,733,000	-12,985,000	'	'	'
Change in fair value due to market changes	-346,000	-9,576,000	16,627,000	-13,899,000	'	'	'
Ending balance	140,863,000	89,653,000	140,863,000	89,653,000	100,812,000	132,889,000	91,783,000
Servicing Assets at Fair Value, Assumptions Used to Estimate Fair Value [Abstract]	'	'	'	'	'	'	'
Discount rate - risk-free rate plus a market premium (in hundredths)	'	'	10.23%	10.32%	10.29%	'	'
Prepayment rate - estimated based upon loan interest rate, original term and loan type, minimum (in hundredths)	'	'	7.03%	9.14%	8.38%	'	'
Prepayment rate - estimated based upon loan interest rate, original term and loan type, maximum (in hundredths)	'	'	30.92%	46.42%	43.94%	'	'
Loan servicing costs - annually per loan based upon loan type, performing, minimum (in dollars per loan)	'	'	58	55	55	'	'
Loan servicing costs - annually per loan based upon loan type, performing, maximum (in dollars per loan)	'	'	105	105	105	'	'
Loan servicing costs - annually per loan based upon loan type, delinquent, minimum (in dollars per loan)	'	'	135	135	135	'	'
Loan servicing costs - annually per loan based upon loan type, delinquent, maximum (in dollars per loan)	'	'	500	500	500	'	'
Loan servicing costs - annually per loan based upon loan type, foreclosure, minimum (in dollars per loan)	'	'	875	875	875	'	'
Loan servicing costs - annually per loan based upon loan type, foreclosure, maximum (in dollars per loan)	'	'	4,250	3,750	4,250	'	'
Escrow earnings rate - indexed to rates paid on deposit accounts with comparable average life (in hundredths)	'	'	1.54%	0.77%	0.87%	'	'
Purchased [Member]	'	'	'	'	'	'	'
Servicing Asset at Fair Value, Amount [Roll Forward]	'	'	'	'	'	'	'
Beginning balance	'	'	12,976,000	18,903,000	18,903,000	15,582,000	16,361,000
Additions, net	0	0	0	0	'	'	'
Change in fair value due to loan runoff	-693,000	-998,000	-2,504,000	-2,958,000	'	'	'
Change in fair value due to market changes	-76,000	-2,648,000	4,341,000	-3,230,000	'	'	'
Ending balance	14,813,000	12,715,000	14,813,000	12,715,000	'	15,582,000	16,361,000
Originated [Member]	'	'	'	'	'	'	'
Servicing Asset at Fair Value, Amount [Roll Forward]	'	'	'	'	'	'	'
Beginning balance	'	'	87,836,000	67,880,000	67,880,000	117,307,000	75,422,000
Additions, net	13,225,000	12,107,000	39,157,000	29,754,000	'	'	'
Change in fair value due to loan runoff	-4,212,000	-3,663,000	-13,229,000	-10,027,000	'	'	'
Change in fair value due to market changes	-270,000	-6,928,000	12,286,000	-10,669,000	'	'	'
Ending balance	$126,050,000	$76,938,000	$126,050,000	$76,938,000	'	$117,307,000	$75,422,000

Mortgage_Banking_Activities_Lo

Mortgage Banking Activities, Loan Servicing Portfolio (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'	'	'	'	'	'
Fair value	$140,863,000	$132,889,000	$100,812,000	$89,653,000	$91,783,000	$86,783,000
Outstanding principal of loans serviced for others	13,298,479,000	'	'	'	'	'
Weighted average prepayment rate (in hundredths)	10.64%	'	'	'	'	'
Increase in Fair Value Of Mortgage Servicing Rights Due To 50 Basis Point Increase In Mortgage Interest Rates	1,700,000	'	'	'	'	'
Decrease in Fair Value Of Mortgage Servicing Rights Due To 50 Basis Point Decrease In Mortgage Interest Rates	2,100,000	'	'	'	'	'
Interest Rate Range Less than 4.00% [Member]	'	'	'	'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'	'	'	'	'	'
Fair value	60,587,000	'	'	'	'	'
Outstanding principal of loans serviced for others	5,367,632,000	'	'	'	'	'
Weighted average prepayment rate (in hundredths)	7.03%	'	'	'	'	'
Interest Rate Range 4.00% to 4.99% [Member]	'	'	'	'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'	'	'	'	'	'
Fair value	47,954,000	'	'	'	'	'
Outstanding principal of loans serviced for others	4,214,910,000	'	'	'	'	'
Weighted average prepayment rate (in hundredths)	8.26%	'	'	'	'	'
Interest Rate Range 5.00% to 5.99% [Member]	'	'	'	'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'	'	'	'	'	'
Fair value	25,965,000	'	'	'	'	'
Outstanding principal of loans serviced for others	2,436,350,000	'	'	'	'	'
Weighted average prepayment rate (in hundredths)	12.05%	'	'	'	'	'
Interest Rate Range Greater than 5.99% [Member]	'	'	'	'	'	'
Stratification of Mortgage Loan Servicing Portfolio [Line Items]	'	'	'	'	'	'
Fair value	6,357,000	'	'	'	'	'
Outstanding principal of loans serviced for others	$1,279,587,000	'	'	'	'	'
Weighted average prepayment rate (in hundredths)	30.92%	'	'	'	'	'

Mortgage_Banking_Activities_Mo1

Mortgage Banking Activities Mortgage Banking Activities, Loans Serviced for Others (Details) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	$12,981,091
Loans Serviced For Others, 30 To 59 Days Past Due	189,665
Loans Serviced For Others, 60 To 89 Days Past Due	51,792
Loans Serviced For Others, Greater Than 90 Days or More Past Due	75,931
Loans Serviced For Others	13,298,479
Federal Home Loan Mortgage Corporation Certificates and Obligations (FHLMC) [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	4,603,938
Loans Serviced For Others, 30 To 59 Days Past Due	38,363
Loans Serviced For Others, 60 To 89 Days Past Due	9,870
Loans Serviced For Others, Greater Than 90 Days or More Past Due	35,126
Loans Serviced For Others	4,687,297
Federal National Mortgage Association Certificates and Obligations (FNMA) [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	3,787,198
Loans Serviced For Others, 30 To 59 Days Past Due	22,249
Loans Serviced For Others, 60 To 89 Days Past Due	5,441
Loans Serviced For Others, Greater Than 90 Days or More Past Due	20,040
Loans Serviced For Others	3,834,928
Government National Mortgage Association Certificates and Obligations (GNMA) [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	4,381,908
Loans Serviced For Others, 30 To 59 Days Past Due	127,465
Loans Serviced For Others, 60 To 89 Days Past Due	36,463
Loans Serviced For Others, Greater Than 90 Days or More Past Due	14,793
Loans Serviced For Others	4,560,629
Other Investor Loans [Member]	'
Financing Receivable, Recorded Investment, Aging [Abstract]	'
Loans Serviced For Others, Current	208,047
Loans Serviced For Others, 30 To 59 Days Past Due	1,588
Loans Serviced For Others, 60 To 89 Days Past Due	18
Loans Serviced For Others, Greater Than 90 Days or More Past Due	5,972
Loans Serviced For Others	$215,625

Mortgage_Banking_Activities_Lo1

Mortgage Banking Activities, Loans Sold With Recourse (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Residential Mortgage Loans Sold With Recourse [Abstract]	'	'	'	'	'	'	'
Carrying amount of residential mortgage loans sold and subject to recourse	$198,000,000	$238,000,000	$198,000,000	$238,000,000	'	$227,000,000	'
Percentage of loans sold with recourse and either more than 90 days past due or in bankruptcy or foreclosure (in hundredths)	6.00%	'	6.00%	'	'	'	'
Principal balance of loans sold with recourse and either 90 days or more past due or in bankruptcy or foreclosure	11,000,000	'	11,000,000	'	'	'	'
Percentage of loans sold with recourse and 30 to 89 days past due (in hundredths)	6.00%	'	6.00%	'	'	'	'
Principal balance of loans sold with recourse and 30 to 89 days past due	12,000,000	'	12,000,000	'	'	'	'
Activity in the allowance for losses on loans sold with recourse [Roll forward]	'	'	'	'	'	'	'
Beginning balance	'	'	11,359,000	18,683,000	9,665,000	'	17,832,000
Provision for recourse losses	601,000	1,055,000	270,000	3,495,000	'	'	'
Loans charged off, net	-981,000	-1,255,000	-2,344,000	-4,546,000	'	'	'
Ending balance	9,285,000	17,632,000	9,285,000	17,632,000	9,665,000	'	17,832,000
Residenital Mortgage Loans Subject to Repurchase Under Standard Representations and Warranties [Abstract]	'	'	'	'	'	'	'
Number of mortgages purchased under repurchase agreement with government sponsored entities.	5	'	'	'	'	'	'
Purchase price of loans purchased under repurchase agreement with government sponsored entities	232,000	'	'	'	'	'	'
Losses incurred on actual repurchased loans from governmental sponsored entities with warranties	0	'	'	'	'	'	'
Number of loans sold under standard representations and warranties indemnified	2	'	'	'	'	'	'
Number of loans with unresolved deficiency requests	524	'	524	'	'	389	'
Principal balance of loans with unresolved deficiency requests	64,428,000	'	64,428,000	'	'	44,831,000	'
Unpaid principal balance of mortgage loans subject to indemnification under standard representations and warranties	2,440,000	'	2,440,000	'	'	1,233,000	'
Accrual for credit losses for loan repurchase under representations and warranties	$7,903,000	'	$7,903,000	'	'	$5,291,000	'

Employee_Benefits_Details

Employee Benefits (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Compensation And Retirment Disclosure [Abstract]	'	'	'	'
Periodic pension cost recognized in period	$500,000	$965,000	$1,500,000	$2,900,000
Pension contribution for current period	'0	'0	'0	'0
Pension Contributions, Maximum Allowable	23,000,000	'	23,000,000	'
Pension Contributions Minimum Required	$0	'	$0	'

Commitments_and_Contingent_Lia2

Commitments and Contingent Liabilities (Details) (USD $)	Sep. 30, 2013
Parent Company [Member] | Visa Membership [Member]	'
Loss Contingencies [Line Items]	'
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
Cavanal Hill Funds [Member]	'
Loss Contingencies [Line Items]	'
Mutual Fund Investment in US Treasury Securities	843,000,000
Mutual Fund Investment in Cash Management	1,200,000,000
Mutual Fund Investment in Tax-Free Money Market Funds	273,000,000
The Net Asset Value of Units in Mutual Funds (per unit)	1
BOKF Equity, LLC [Member]	'
Loss Contingencies [Line Items]	'
Number of Private Equity Funds of which the Entity is a General Partner	2
Contingent Obligations For Additional Investments in Private Equity Funds	$6,400,000

Commitments_and_Contingent_Lia3

Commitments and Contingent Liabilities Variable Interest Entities (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
In Thousands, unless otherwise specified
Loans VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	$10,000	$10,000	$10,000
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	30,345	22,354	17,486
Other Assets VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	50,886	51,086	51,910
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	101,635	87,222	79,619
Other Liabilities VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	45,983	44,854	38,495
Other Borrowings VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	10,964	10,964	10,964
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Non Controlling Interest VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	35,730	35,821	36,818
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Private Equity Funds Variable Interest Entities [Member] | Loans VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Private Equity Funds Variable Interest Entities [Member] | Other Assets VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	27,799	28,169	28,792
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	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	0
Private Equity Funds Variable Interest Entities [Member] | Non Controlling Interest VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	23,710	23,691	24,777
Tax Credit Variable Interest Entities [Member] | Loans VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	10,000	10,000	10,000
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	30,345	22,354	17,486
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	13,577	13,965	14,094
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	92,039	78,109	69,717
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	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	44,285	43,052	36,433
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	10,964
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Tax Credit Variable Interest Entities [Member] | Non Controlling Interest VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	10,000	10,000	10,000
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Other Variable Interest Entities [Member] | Loans VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	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	9,510	8,952	9,024
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	9,596	9,113	9,902
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	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	1,698	1,802	2,062
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	0
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	0	0	0
Other Variable Interest Entities [Member] | Non Controlling Interest VIE [Member]	'	'	'
Variable Interest Entity [Line Items]	'	'	'
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net	2,020	2,130	2,041
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net	$0	$0	$0

Commitments_and_Contingent_Lia4

Commitments and Contingent Liabilities Guarantor Obligations (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Sep. 30, 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	12
Guaranteed Percentage To Be Received (in hundredths)	80.00%
Maximum Amount To Be Received Under Rent Agreement With City Of Tulsa	$4.50

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	3 Months Ended		9 Months Ended																				0 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Oct. 29, 2013
							Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]		Accumulated Net Unrealized Gain (Loss) on Available for Sale Securities [Member]		Accumulated Unrealized Gain on Investment Securities Transferred from AFS [Member]		Accumulated Unrealized Gain on Investment Securities Transferred from AFS [Member]		Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]		Accumulated Unrealized Gain (Loss) on Employee Benefit Plans [Member]		Accumulated Loss on Effective Cash Flow Hedges [Member]		Accumulated Loss on Effective Cash Flow Hedges [Member]		Dividend Declared [Member]
Dividends Payable, Date Declared	'	'	'		'		'		'		'		'		'		'		'		'		29-Oct-13
Dividends declared (in dollars per share)	$0.38	$0.38	$1.14		$1.09		'		'		'		'		'		'		'		'		$0.40
Dividends Payable, Date to be Paid	'	'	'		'		'		'		'		'		'		'		'		'		29-Nov-13
Dividends Payable, Date of Record	'	'	'		'		'		'		'		'		'		'		'		'		16-Nov-13
Schedule of Accumulated Other Income (Loss) [Abstract]	'	'	'		'		'		'		'		'		'		'		'		'		'
Balance, Beginning of Period	'	'	$149,920		$128,979		$155,553		$135,740		$3,078		$6,673		($8,296)		($12,742)		($415)		($692)		'
Net change in unrealized gain (loss)	-35,839	46,064	-240,384		86,098		-240,384		86,390		0		0		0		-292		0		0		'
Reclassification Adjustments Included in Earnings [Abstract]	'	'	'		'		'		'		'		'		'		'		'		'		'
Interest revenue, Investment securities, Taxable securities	-696	-2,009	-2,717		-5,430		0		0		-2,717		-5,430		0		0		0		0		'
Interest expense, Subordinated debentures	85	68	209		399		0		0		0		0		0		0		209		399		'
Net impairment losses recognized in earnings	1,509	1,104	2,308		5,684		2,308		5,684		0		0		0		0		0		0		'
Gain on available for sale securities, net	-478	-7,967	-9,086		-32,779		-9,086		-32,779		0		0		0		0		0		0		'
Other comprehensive income (loss), before income taxes	-35,419	37,260	-249,670		53,972		-247,162		59,295		-2,717		-5,430		0		-292		209		399		'
Income tax benefit (expense)	13,779	-14,057	97,124	[1]	-20,558	[1]	96,146	[1]	-23,066	[1]	1,059	[1]	2,550	[1]	0	[1]	113	[1]	-81	[1]	-155	[1]	'
Other comprehensive income (loss), net of income taxes	-21,640	23,203	-152,546		33,414		-151,016		36,229		-1,658		-2,880		0		-179		128		244		'
Balance, End of Period	($2,626)	$162,393	($2,626)		$162,393		$4,537		$171,969		$1,420		$3,793		($8,296)		($12,921)		($287)		($448)		'
[1]	Calculated using a 39% effective tax rate.

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Numerator: [Abstract]	'	'	'	'
Net income attributable to BOK Financial Corporation shareholders	$75,738	$87,382	$243,633	$268,626
Earnings allocated to participating securities	799	278	2,623	1,994
Numerator for basic earnings per share - income available to common shareholders	74,939	87,104	241,010	266,632
Effect of reallocating undistributed earnings of participating securities	2	1	6	6
Numerator for diluted earnings per share - income available to common shareholders	$74,941	$87,105	$241,016	$266,638
Denominator: [Abstract]	'	'	'	'
Weighted average shares outstanding (in shares)	68,770,950	68,183,171	68,687,609	68,204,078
Less: Participating securities included in weighted average shares (in shares)	721,771	216,471	734,356	499,735
Denominator for basic earnings per common share (in shares)	68,049,179	67,966,700	67,953,253	67,704,343
Dilutive effect of employee stock compensation plans (in shares)	223,682	368,289	222,662	277,215
Denominator for diluted earnings per common share (in shares)	68,272,861	68,334,989	68,175,915	67,981,558
Basic earnings per share (per share)	$1.10	$1.28	$3.55	$3.94
Diluted earnings per share (per share)	$1.10	$1.27	$3.54	$3.92
Excludes employee stock options with exercise prices greater than current market price.	0	87,749	0	270,288

Reportable_Segments_Details

Reportable Segments (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]	'	'	'	'
Net interest revenue from external sources	$166,351	$176,027	$503,912	$530,957
Net interest revenue (expense) from internal sources	0	0	0	0
Net interest revenue	166,351	176,027	503,912	530,957
Provision for credit losses	-8,500	0	-16,500	-8,000
Net interest revenue after provision for credit losses	174,851	176,027	520,412	538,957
Other operating revenue	145,316	179,944	455,151	503,485
Operating expense	210,644	222,340	608,574	627,487
Net income before taxes	109,523	133,631	366,989	414,955
Federal and state income taxes	33,461	45,778	121,980	144,447
Net income	76,062	87,853	245,009	270,508
Net income attributable to non-controlling interest	324	471	1,376	1,882
Net income attributable to BOK Financial Corporation shareholders	75,738	87,382	243,633	268,626
Average assets	27,254,732	26,588,172	27,474,882	25,883,670
Average invested capital	2,964,923	2,947,192	2,996,685	2,883,952
Performance measurements: [Abstract]	'	'	'	'
Return on average assets	1.10%	1.31%	1.19%	1.39%
Return on average invested capital	10.13%	11.80%	10.87%	12.44%
Efficiency ratio	66.03%	61.18%	63.35%	60.68%
Operating Segments [Member] | Commercial [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest revenue from external sources	91,540	91,381	272,889	274,423
Net interest revenue (expense) from internal sources	-9,405	-11,002	-27,907	-34,491
Net interest revenue	82,135	80,379	244,982	239,932
Provision for credit losses	-1,326	3,253	-219	10,393
Net interest revenue after provision for credit losses	83,461	77,126	245,201	229,539
Other operating revenue	42,509	40,091	127,352	131,042
Operating expense	60,969	62,633	179,795	181,119
Net income before taxes	65,001	54,584	192,758	179,462
Federal and state income taxes	25,285	21,233	74,983	69,811
Net income	39,716	33,351	117,775	109,651
Net income attributable to non-controlling interest	'	'	0	0
Net income attributable to BOK Financial Corporation shareholders	39,716	33,351	117,775	109,651
Average assets	10,460,986	10,065,208	10,470,800	9,981,793
Average invested capital	911,229	865,157	900,789	880,777
Performance measurements: [Abstract]	'	'	'	'
Return on average assets	1.51%	1.32%	1.50%	1.47%
Return on average invested capital	17.29%	15.34%	17.48%	16.63%
Efficiency ratio	48.92%	51.99%	48.30%	50.80%
Operating Segments [Member] | Consumer [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest revenue from external sources	25,131	24,862	74,056	77,173
Net interest revenue (expense) from internal sources	5,060	5,410	15,711	15,093
Net interest revenue	30,191	30,272	89,767	92,266
Provision for credit losses	1,331	338	3,663	5,991
Net interest revenue after provision for credit losses	28,860	29,934	86,104	86,275
Other operating revenue	46,932	80,640	152,066	205,400
Operating expense	56,431	74,486	152,122	197,399
Net income before taxes	19,361	36,088	86,048	94,276
Federal and state income taxes	7,531	14,038	33,473	36,673
Net income	11,830	22,050	52,575	57,603
Net income attributable to non-controlling interest	'	'	0	0
Net income attributable to BOK Financial Corporation shareholders	11,830	22,050	52,575	57,603
Average assets	5,655,914	5,671,356	5,691,406	5,705,411
Average invested capital	293,716	292,280	295,394	287,888
Performance measurements: [Abstract]	'	'	'	'
Return on average assets	0.83%	1.55%	1.24%	1.35%
Return on average invested capital	15.98%	30.01%	23.80%	26.73%
Efficiency ratio	71.53%	61.11%	64.28%	63.62%
Operating Segments [Member] | Wealth Management [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest revenue from external sources	6,300	7,064	19,373	21,340
Net interest revenue (expense) from internal sources	4,837	5,452	15,209	15,503
Net interest revenue	11,137	12,516	34,582	36,843
Provision for credit losses	255	509	1,704	1,680
Net interest revenue after provision for credit losses	10,882	12,007	32,878	35,163
Other operating revenue	55,601	50,156	163,368	148,105
Operating expense	59,993	53,917	178,694	158,505
Net income before taxes	6,490	8,246	17,552	24,763
Federal and state income taxes	2,525	3,208	6,828	9,633
Net income	3,965	5,038	10,724	15,130
Net income attributable to non-controlling interest	'	'	0	0
Net income attributable to BOK Financial Corporation shareholders	3,965	5,038	10,724	15,130
Average assets	4,385,941	4,273,386	4,537,922	4,202,977
Average invested capital	206,872	188,755	204,592	179,772
Performance measurements: [Abstract]	'	'	'	'
Return on average assets	0.36%	0.47%	0.32%	0.48%
Return on average invested capital	7.62%	10.59%	7.00%	11.25%
Efficiency ratio	89.99%	86.27%	90.57%	85.91%
Corporate, Non-Segment [Member] | Funds Management and Other [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest revenue from external sources	43,380	52,720	137,594	158,021
Net interest revenue (expense) from internal sources	-492	140	-3,013	3,895
Net interest revenue	42,888	52,860	134,581	161,916
Provision for credit losses	-8,760	-4,100	-21,648	-26,064
Net interest revenue after provision for credit losses	51,648	56,960	156,229	187,980
Other operating revenue	274	9,057	12,365	18,938
Operating expense	33,251	31,304	97,963	90,464
Net income before taxes	18,671	34,713	70,631	116,454
Federal and state income taxes	-1,880	7,299	6,696	28,330
Net income	20,551	27,414	63,935	88,124
Net income attributable to non-controlling interest	324	471	1,376	1,882
Net income attributable to BOK Financial Corporation shareholders	20,227	26,943	62,559	86,242
Average assets	6,751,891	6,578,222	6,774,754	5,993,489
Average invested capital	$1,553,106	$1,601,000	$1,595,910	$1,535,515

Fair_Value_Measurements_Fair_V

Fair Value Measurements, Fair Value Of Financial Instruments as Measured On a Recurring Basis (Details) (USD $)	Sep. 30, 2013		Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Mar. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Assets [Abstract]	'		'	'		'		'	'
Trading securities	$150,887		'	$214,102		$204,242		'	'
Available for sale securities	10,372,903		'	11,287,221		11,506,434		'	'
Fair value option securities	167,860		'	284,296		331,887		'	'
Mortgage servicing rights	140,863		132,889	100,812		89,653		91,783	86,783
Derviative contracts, net of cash margin, assets	377,325		'	338,106		435,653		'	'
Liabilities [Abstract]	'		'	'		'		'	'
Derivative contracts net of cash margin, liabilities	232,544		'	283,589		254,422		'	'
U.S. Government agency debentures [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	74,632		'	16,545		3,100		'	'
U.S. agency residential mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	26,129		'	86,361		119,835		'	'
Available for sale securities	7,981,387		'	9,889,821		10,654,821		'	'
Fair value option securities	163,567		'	257,040		305,445		'	'
Municipal and other tax-exempt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	37,057		'	90,326		58,150		'	'
Available for sale securities	95,440		'	87,142		87,969		'	'
Other trading securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	13,069		'	20,870		23,157		'	'
U.S. Treasury securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	1,052		'	1,002		1,002		'	'
Privately issued residential mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	230,900		'	325,163		331,722		'	'
Commercial mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	1,946,295		'	895,075		339,095		'	'
Other debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	35,362		'	36,389		36,456		'	'
Fair value option securities	4,293		'	770		0		'	'
Perpetual preferred stock [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	23,680		'	25,072		25,288		'	'
Equity securities and mutual funds [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	58,787		'	27,557		30,081		'	'
Corporate debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Fair value option securities	0		'	26,486		26,442		'	'
Fair Value, Measurements, Recurring [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	150,887		'	214,102		204,242		'	'
Available for sale securities	10,372,903		'	11,287,221		11,506,434		'	'
Fair value option securities	167,860		'	284,296		331,887		'	'
Residential mortgage loans held for sale	230,511		'	293,762		325,102		'	'
Mortgage servicing rights	140,863	[1]	'	100,812	[1]	89,653	[1]	'	'
Derviative contracts, net of cash margin, assets	377,325	[2]	'	338,106	[2]	472,783	[2]	'	'
Other assets, private equity funds	27,799		'	28,169		28,792		'	'
Liabilities [Abstract]	'		'	'		'		'	'
Derivative contracts net of cash margin, liabilities	232,544	[2]	'	283,589	[2]	435,497	[2]	'	'
Fair Value, Measurements, Recurring [Member] | U.S. Government agency debentures [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	74,632		'	16,545		3,100		'	'
Fair Value, Measurements, Recurring [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	26,129		'	86,361		119,835		'	'
Available for sale securities	7,981,387		'	9,889,821		10,654,821		'	'
Fair value option securities	163,567		'	257,040		305,445		'	'
Fair Value, Measurements, Recurring [Member] | Municipal and other tax-exempt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	37,057		'	90,326		58,150		'	'
Available for sale securities	95,440		'	87,142		87,969		'	'
Fair Value, Measurements, Recurring [Member] | Other trading securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	13,069		'	20,870		23,157		'	'
Fair Value, Measurements, Recurring [Member] | U.S. Treasury securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	1,052		'	1,002		1,002		'	'
Fair Value, Measurements, Recurring [Member] | Privately issued residential mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	230,900		'	325,163		331,722		'	'
Fair Value, Measurements, Recurring [Member] | Commercial mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	1,946,295		'	895,075		339,095		'	'
Fair Value, Measurements, Recurring [Member] | Other debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	35,362		'	36,389		36,456		'	'
Fair value option securities	4,293		'	770		'		'	'
Fair Value, Measurements, Recurring [Member] | Perpetual preferred stock [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	23,680		'	25,072		25,288		'	'
Fair Value, Measurements, Recurring [Member] | Equity securities and mutual funds [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	58,787		'	27,557		30,081		'	'
Fair Value, Measurements, Recurring [Member] | Corporate debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Fair value option securities	'		'	26,486		26,442		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	0		'	0		0		'	'
Available for sale securities	1,052		'	5,167		7,914		'	'
Fair value option securities	0		'	0		0		'	'
Residential mortgage loans held for sale	0		'	0		0		'	'
Mortgage servicing rights	0	[1]	'	0	[1]	0	[1]	'	'
Derviative contracts, net of cash margin, assets	644	[2]	'	11,597	[2]	8,301	[2]	'	'
Other assets, private equity funds	0		'	0		0		'	'
Liabilities [Abstract]	'		'	'		'		'	'
Derivative contracts net of cash margin, liabilities	0	[2]	'	0	[2]	0	[2]	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Government agency debentures [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	0		'	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		0		'	'
Available for sale securities	0		'	0		0		'	'
Fair value option securities	0		'	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		0		'	'
Available for sale securities	0		'	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other trading securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	0		'	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | U.S. Treasury securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	1,052		'	1,002		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		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		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	0		'	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		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		6,912		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Fair value option securities	'		'	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	150,887		'	214,102		204,242		'	'
Available for sale securities	10,323,261		'	11,233,792		11,451,841		'	'
Fair value option securities	167,860		'	284,296		331,887		'	'
Residential mortgage loans held for sale	230,511		'	293,762		325,102		'	'
Mortgage servicing rights	0	[1]	'	0	[1]	0	[1]	'	'
Derviative contracts, net of cash margin, assets	376,681	[2]	'	326,509	[2]	464,482	[2]	'	'
Other assets, private equity funds	0		'	0		0		'	'
Liabilities [Abstract]	'		'	'		'		'	'
Derivative contracts net of cash margin, liabilities	232,544	[2]	'	283,589	[2]	435,497	[2]	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Government agency debentures [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	74,632		'	16,545		3,100		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. agency residential mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	26,129		'	86,361		119,835		'	'
Available for sale securities	7,981,387		'	9,889,821		10,654,821		'	'
Fair value option securities	163,567		'	257,040		305,445		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Municipal and other tax-exempt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	37,057		'	90,326		58,150		'	'
Available for sale securities	55,769		'	46,440		46,690		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other trading securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	13,069		'	20,870		23,157		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | U.S. Treasury securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	0		'	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	230,900		'	325,163		331,722		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Commercial mortgage-backed securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	1,946,295		'	895,075		339,095		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	30,650		'	30,990		31,056		'	'
Fair value option securities	4,293		'	770		'		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Perpetual preferred stock [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	23,680		'	25,072		25,288		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity securities and mutual funds [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	54,580		'	21,231		23,169		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Fair value option securities	'		'	26,486		26,442		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	0		'	0		0		'	'
Available for sale securities	48,590		'	48,262		46,679		'	'
Fair value option securities	0		'	0		0		'	'
Residential mortgage loans held for sale	0		'	0		0		'	'
Mortgage servicing rights	140,863	[1]	'	100,812	[1]	89,653	[1]	'	'
Derviative contracts, net of cash margin, assets	0	[2]	'	0	[2]	0	[2]	'	'
Other assets, private equity funds	27,799		'	28,169		28,792		'	'
Liabilities [Abstract]	'		'	'		'		'	'
Derivative contracts net of cash margin, liabilities	0	[2]	'	0	[2]	0	[2]	'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Government agency debentures [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	0		'	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		0		'	'
Available for sale securities	0		'	0		0		'	'
Fair value option securities	0		'	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		0		'	'
Available for sale securities	39,671		'	40,702		41,279		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Other trading securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Trading securities	0		'	0		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | U.S. Treasury securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	0		'	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		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		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		5,400		'	'
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		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity securities and mutual funds [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Available for sale securities	4,207		'	2,161		0		'	'
Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate debt securities [Member]	'		'	'		'		'	'
Assets [Abstract]	'		'	'		'		'	'
Fair value option securities	'		'	$0		$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 5, 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 contacts, net of cash margin.

Fair_Value_Measurements_Measur

Fair Value Measurements, Measured On Recurring Basis Significant Unobservable Inputs (Details) (Fair Value, Inputs, Level 3 [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Mar. 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	$38,847	$41,662
Purchases and capital calls	0	0	0	0	'	'
Redemptions and distributions	0	1	-98	-462	'	'
Other comprehensive gain (loss)	2,193	-384	436	-613	'	'
Balance at end of period	39,671	41,279	39,671	41,279	38,847	41,662
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	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	0	0	0	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	0	-1,369	0	'	'
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	5,193	5,388
Purchases and capital calls	0	0	0	0	'	'
Redemptions and distributions	-500	0	-500	-500	'	'
Other comprehensive gain (loss)	19	12	-187	0	'	'
Balance at end of period	4,712	5,400	4,712	5,400	5,193	5,388
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	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	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	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	'	2,247	'
Purchases and capital calls	0	'	0	'	'	'
Redemptions and distributions	0	'	0	'	'	'
Other comprehensive gain (loss)	1,960	'	2,046	'	'	'
Balance at end of period	4,207	'	4,207	'	2,247	'
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	28,379	31,492
Purchases and capital calls	567	476	1,207	2,385	'	'
Redemptions and distributions	-1,589	-3,906	-3,424	-7,072	'	'
Other comprehensive gain (loss)	0	0	0	0	'	'
Balance at end of period	27,799	28,792	27,799	28,792	28,379	31,492
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	442	730	1,847	2,577	'	'
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	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	$0	$0	'	'

Fair_Value_Measurements_Fair_V1

Fair Value Measurements Fair Value Measurements, Financial Instruments Measured On a Recurring Basis, Quantitative Information (Details) (Fair Value, Inputs, Level 3 [Member], USD $)	9 Months Ended				12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
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	$45,470		$46,100		$45,570
Fair Value Inputs, Asset, Amortized Cost	39,391	[1]	42,395	[1]	40,857	[1]
Fair Value Inputs, Asset, Fair Value	39,671		41,279		40,702
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	21,545		29,100		28,570
Fair Value Inputs, Asset, Amortized Cost	21,467	[1]	28,999	[1]	28,473	[1]
Fair Value Inputs, Asset, Fair Value	20,531		28,848		28,318
Fair Value Measurements, Valuation Techniques	'Discounted cash flows	[2]	'Discounted cash flows	[2]	'Discounted cash flows	[2]
Fair Value Measurements, Significant Unobservable Input	'Interest rate spread		'Interest rate spread		'Interest rate spread
Fair Value Inputs, Assets, Discount Rate, Minimum	4.98%	[3]	1.00%	[4]	1.00%	[4]
Fair Value Inputs, Assets, Discount Rate, Maximum	5.28%	[3]	1.50%	[4]	1.50%	[4]
Fair Value Inputs, Assets, Discount Rate, Weighted Average	5.15%	[3]	1.25%	[4]	1.25%	[4]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Minimum	95.02%	[5]	98.85%	[5]	98.83%	[5]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Maximum	95.55%	[5]	99.47%	[5]	99.43%	[5]
Fair Value Inputs, Fair Value As Percentage of Par Value, Weighted Average	95.29%	[5]	99.13%	[5]	99.12%	[5]
Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Minimum	462		75		75
Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities Maximum	517		80		80
Additional Decrease in Fair Value From a 100 Basis Point Increase in Interest Rate Spread	-199		'		'
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	23,925		17,000		17,000
Fair Value Inputs, Asset, Amortized Cost	17,924	[1]	13,396	[1]	12,384	[1]
Fair Value Inputs, Asset, Fair Value	19,140		12,431		12,384
Fair Value Measurements, Valuation Techniques	'Proposed settlement agreement	[6]	'Discounted cash flows	[2]	'Discounted cash flows	[2]
Fair Value Measurements, Significant Unobservable Input	'Discount for settlement uncertainty		'Interest rate spread		'Interest rate spread
Fair Value Inputs, Assets, Discount Rate, Minimum	'		7.20%	[7]	7.21%	[7]
Fair Value Inputs, Assets, Discount Rate, Maximum	'		9.88%	[7]	9.83%	[7]
Fair Value Inputs, Assets, Discount Rate, Weighted Average	'		7.77%	[7]	7.82%	[7]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Minimum	80.00%	[5]	73.06%	[5]	72.79%	[5]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Maximum	80.00%	[5]	73.30%	[5]	73.00%	[5]
Fair Value Inputs, Fair Value As Percentage of Par Value, Weighted Average	80.00%	[5]	73.13%	[5]	72.85%	[5]
Below Investment Grade Tax Exempt Securities Yield Spread Over Comparable Securities	'		700		700
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		5,400
Fair Value Inputs, Asset, Amortized Cost	4,900	[1]	5,400	[1]	5,400	[1]
Fair Value Inputs, Asset, Fair Value	4,712		5,400		5,399
Fair Value Measurements, Valuation Techniques	'Discounted cash flows	[2]	'Discounted cash flows	[2]	'Discounted cash flows	[2]
Fair Value Measurements, Significant Unobservable Input	'Interest rate spread		'Interest rate spread		'Interest rate spread
Fair Value Inputs, Assets, Discount Rate, Minimum	5.60%	[8]	1.70%	[8]	1.65%	[8]
Fair Value Inputs, Assets, Discount Rate, Maximum	5.68%	[8]	1.73%	[8]	1.71%	[8]
Fair Value Inputs, Assets, Discount Rate, Weighted Average	5.67%	[8]	1.71%	[8]	1.70%	[8]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Minimum	96.16%	[5]	100.00%	[5]	100.00%	[5]
Fair Value Inputs, Assets, Fair Value As Percentage of Par Value, Maximum	96.16%	[5]	100.00%	[5]	100.00%	[5]
Fair Value Inputs, Fair Value As Percentage of Par Value, Weighted Average	96.16%	[5]	100.00%	[5]	100.00%	[5]
Average Yields On Comparable Short-term Taxable Securities Maximum	1.00%		1.00%		1.00%
Additional Decrease in Fair Value From a 100 Basis Point Increase in Interest Rate Spread	-45		'		'
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	[1]	'		2,161	[1]
Fair Value Inputs, Asset, Fair Value	4,207		'		2,161
Fair Value Measurements, Valuation Techniques	'Publicly announced preliminary purchase price information from acquirer.		'		'Tangible book value per share of publicly traded financial institutions of similar size, less liquidity discount.	[9]
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%
Other assets - private equity funds [Member]	'		'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'		'
Fair Value Inputs, Asset, Fair Value	$27,799		$28,792		$28,169
Fair Value Measurements, Valuation Techniques	'Net asset value reported by underlying fund		'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		'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 462 to 517 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]
[7]	Interest rate yields determined using a spread of 700 basis points over comparable municipal securities of varying durations.
[8]	Interest rate yields used to value investment grade taxable securities based on comparable short-term taxable securities which are generally yielding less than 1%.
[9]	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_Measurements_Fair_V2

Fair Value Measurements, Fair Value Measured On a Nonrecurring Basis (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 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	$660	$3,915	$6,900	$10,797
Net losses and expenses of repossessed assets, net	0	0	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	0	0
Net losses and expenses of repossessed assets, net	1,767	4,398	2,560	11,068
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	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	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	10,607	25,521	10,607	25,521
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	14,901	38,386	14,901	38,386
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	4,787	1,655	4,787	1,655
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	$170	$6,617	$170	$6,617

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 $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Impaired Loans [Member]	'		'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'		'
Assets, Fair Value Disclosure, Nonrecurring	$4,787		$1,655
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]	'		'
Fair Value Measurement, Marketability adjustment as perecentage of appraised value	15.00%		15.00%
Assets, Fair Value Disclosure, Nonrecurring	170		6,617
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	82.00%	[1]	68.00%	[2]
Fair Value Measurement, Percentage of Appraised Value, Maximum	85.00%	[1]	100.00%	[2]
Fair Value Measurement, Percentage of Appraised Value, Weighted Average	83.00%	[1]	85.00%	[2]
Fair Value Measurement, Fair Value With No Third Party Appraisal	'		$796
[1]	Marketability adjustments include consideration of estimated costs to sell which is approximately 15% of fair value.
[2]	Marketability adjustments include consideration of estimated costs to sell which is approximately 15% of fair value. In addition, $796 thousand of real estate and other repossessed assets at September 30, 2012 are based on expert opinions or management's knowledge of the collateral or industry and do not have and independently appraised value.

Fair_Value_Measurements_Financ

Fair Value Measurements, Financial Instruments (Details) (USD $)	Sep. 30, 2013		Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Mar. 31, 2012	Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	$150,887,000		'	$214,102,000		$204,242,000		'	'
Investment securities	644,225,000	[1]	'	499,534,000	[2]	432,114,000	[3]	'	'
Available for sale securities	10,372,903,000		'	11,287,221,000		11,506,434,000		'	'
Fair value option securities	167,860,000		'	284,296,000		331,887,000		'	'
Residential mortgage loans held for sale	230,511,000		'	293,762,000		325,102,000		'	'
Loans	12,350,100,000		'	12,311,456,000		11,832,367,000		'	'
Allowance for loan losses	-194,325,000		-203,124,000	-215,507,000		-233,756,000		-231,669,000	-253,481,000
Loans, net of allowance	12,155,775,000		'	12,095,949,000		11,598,611,000		'	'
Mortgage servicing rights	140,863,000		132,889,000	100,812,000		89,653,000		91,783,000	86,783,000
Derviative contracts, net of cash margin, assets	377,325,000		'	338,106,000		435,653,000		'	'
Time deposits	2,720,020,000		'	2,967,992,000		3,022,326,000		'	'
Subordinated debentures	347,758,000		'	347,633,000		347,592,000		'	'
Derivative contracts net of cash margin, liabilities	232,544,000		'	283,589,000		254,422,000		'	'
Fair Value Assumptions and Methodology for Assets and Liabilities [Abstract]	'		'	'		'		'	'
Specific allocation of allowance for loan losses included in fair value of loans	153,000,000		'	171,000,000		193,000,000		'	'
Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	7,571,075,000		'	7,641,912,000		7,266,907,000		'	'
Allowance for loan losses	-61,780,000		-64,044,000	-65,280,000		-81,779,000		-83,477,000	-83,443,000
Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2,349,229,000		'	2,228,999,000		2,177,272,000		'	'
Allowance for loan losses	-45,062,000		-49,687,000	-54,884,000		-60,704,000		-55,806,000	-67,034,000
Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2,034,765,000		'	2,045,040,000		2,016,303,000		'	'
Allowance for loan losses	-38,297,000		-39,206,000	-41,703,000		-41,016,000		-42,688,000	-46,476,000
Consumer [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	395,031,000		'	395,505,000		371,885,000		'	'
Allowance for loan losses	-8,304,000		-7,738,000	-9,453,000		-9,343,000		-8,840,000	-10,178,000
U.S. Government agency debentures [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	74,632,000		'	16,545,000		3,100,000		'	'
U.S. agency residential mortgage-backed securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	26,129,000		'	86,361,000		119,835,000		'	'
Available for sale securities	7,981,387,000		'	9,889,821,000		10,654,821,000		'	'
Fair value option securities	163,567,000		'	257,040,000		305,445,000		'	'
Municipal and other tax-exempt securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	37,057,000		'	90,326,000		58,150,000		'	'
Investment securities	409,542,000	[1]	'	232,700,000	[2]	155,144,000	[3]	'	'
Available for sale securities	95,440,000		'	87,142,000		87,969,000		'	'
Other trading securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	13,069,000		'	20,870,000		23,157,000		'	'
U.S. Treasury securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	1,052,000		'	1,002,000		1,002,000		'	'
Privately issued residential mortgage-backed securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	230,900,000		'	325,163,000		331,722,000		'	'
Commercial mortgage-backed securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	1,946,295,000		'	895,075,000		339,095,000		'	'
Other debt securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Investment securities	178,501,000	[1]	'	184,067,000	[2]	185,059,000	[3]	'	'
Available for sale securities	35,362,000		'	36,389,000		36,456,000		'	'
Fair value option securities	4,293,000		'	770,000		0		'	'
Perpetual preferred stock [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	23,680,000		'	25,072,000		25,288,000		'	'
Equity securities and mutual funds [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	58,787,000		'	27,557,000		30,081,000		'	'
Corporate debt securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Fair value option securities	0		'	26,486,000		26,442,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Cash and cash equivalents	1,133,771,000		'	1,286,239,000		615,494,000		'	'
Trading securities	150,887,000		'	214,102,000		204,242,000		'	'
Investment securities	644,225,000		'	499,534,000		432,114,000		'	'
Available for sale securities	10,372,903,000		'	11,287,221,000		11,506,434,000		'	'
Fair value option securities	167,860,000		'	284,296,000		331,887,000		'	'
Residential mortgage loans held for sale	230,511,000		'	293,762,000		325,102,000		'	'
Loans	12,350,100,000		'	12,311,456,000		11,832,367,000		'	'
Allowance for loan losses	-194,325,000		'	215,507,000		233,756,000		'	'
Loans, net of allowance	12,155,775,000		'	12,095,949,000		11,598,611,000		'	'
Mortgage servicing rights	140,863,000		'	100,812,000		89,653,000		'	'
Derviative contracts, net of cash margin, assets	377,325,000		'	338,106,000		472,783,000		'	'
Other assets - private equity funds	27,799,000		'	28,169,000		28,791,000		'	'
Deposits with no stated maturity	16,771,635,000		'	18,211,068,000		16,120,541,000		'	'
Time deposits	2,720,020,000		'	2,967,992,000		3,022,326,000		'	'
Other borrowings	3,611,944,000		'	2,706,221,000		3,429,575,000		'	'
Subordinated debentures	347,758,000		'	347,633,000		347,592,000		'	'
Derivative contracts net of cash margin, liabilities	232,544,000		'	283,589,000		435,497,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	7,571,075,000		'	7,641,912,000		7,266,907,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2,349,229,000		'	2,228,999,000		2,177,272,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2,034,765,000		'	2,045,040,000		2,016,303,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Consumer [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	395,031,000		'	395,505,000		371,885,000		'	'
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	74,632,000		'	16,545,000		3,100,000		'	'
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	26,129,000		'	86,361,000		119,835,000		'	'
Investment securities	56,182,000		'	82,767,000		91,911,000		'	'
Available for sale securities	7,981,387,000		'	9,889,821,000		10,654,821,000		'	'
Fair value option securities	163,567,000		'	257,040,000		305,445,000		'	'
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	37,057,000		'	90,326,000		58,150,000		'	'
Investment securities	409,542,000		'	232,700,000		155,144,000		'	'
Available for sale securities	95,440,000		'	87,142,000		87,969,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other trading securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	13,069,000		'	20,870,000		23,157,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | U.S. Treasury securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	1,052,000		'	1,002,000		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	230,900,000		'	325,163,000		331,722,000		'	'
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	1,946,295,000		'	895,075,000		339,095,000		'	'
Carrying (Reported) Amount, Fair Value Disclosure [Member] | Other debt securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Investment securities	178,501,000		'	184,067,000		185,059,000		'	'
Available for sale securities	35,362,000		'	36,389,000		36,456,000		'	'
Fair value option securities	4,293,000		'	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	23,680,000		'	25,072,000		25,288,000		'	'
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	58,787,000		'	27,557,000		30,081,000		'	'
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	'		'	26,486,000		26,442,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Cash and cash equivalents	1,133,771,000		'	1,286,239,000		615,494,000		'	'
Trading securities	150,887,000		'	214,102,000		204,242,000		'	'
Investment securities	654,479,000		'	528,458,000		460,358,000		'	'
Available for sale securities	10,372,903,000		'	11,287,221,000		11,506,434,000		'	'
Fair value option securities	167,860,000		'	284,296,000		331,887,000		'	'
Residential mortgage loans held for sale	230,511,000		'	293,762,000		325,102,000		'	'
Loans	12,264,613,000		'	12,314,243,000		11,827,797,000		'	'
Allowance for loan losses	0		'	0		0		'	'
Loans, net of allowance	12,264,613,000		'	12,314,243,000		11,827,797,000		'	'
Mortgage servicing rights	140,863,000		'	100,812,000		89,653,000		'	'
Derviative contracts, net of cash margin, assets	377,325,000		'	338,106,000		472,783,000		'	'
Other assets - private equity funds	27,799,000		'	28,169,000		28,791,000		'	'
Deposits with no stated maturity	16,771,635,000		'	18,211,068,000		16,120,541,000		'	'
Time deposits	2,739,764,000		'	3,037,708,000		3,099,183,000		'	'
Other borrowings	3,570,228,000		'	2,696,574,000		3,420,135,000		'	'
Subordinated debentures	344,854,000		'	345,675,000		345,852,000		'	'
Derivative contracts net of cash margin, liabilities	232,544,000		'	283,589,000		435,497,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	7,493,143,000		'	7,606,505,000		7,232,761,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2,326,908,000		'	2,208,217,000		2,142,239,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2,056,072,000		'	2,110,773,000		2,084,251,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Consumer [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	388,490,000		'	388,748,000		368,546,000		'	'
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	74,632,000		'	16,545,000		3,100,000		'	'
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	26,129,000		'	86,361,000		119,835,000		'	'
Investment securities	58,442,000		'	85,943,000		95,128,000		'	'
Available for sale securities	7,981,387,000		'	9,889,821,000		10,654,821,000		'	'
Fair value option securities	163,567,000		'	257,040,000		305,445,000		'	'
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	37,057,000		'	90,326,000		58,150,000		'	'
Investment securities	407,562,000		'	235,940,000		159,464,000		'	'
Available for sale securities	95,440,000		'	87,142,000		87,969,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Other trading securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Trading securities	13,069,000		'	20,870,000		23,157,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | U.S. Treasury securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Available for sale securities	1,052,000		'	1,002,000		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	230,900,000		'	325,163,000		331,722,000		'	'
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	1,946,295,000		'	895,075,000		339,095,000		'	'
Estimate of Fair Value, Fair Value Disclosure [Member] | Other debt securities [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Investment securities	188,475,000		'	206,575,000		205,766,000		'	'
Available for sale securities	35,362,000		'	36,389,000		36,456,000		'	'
Fair value option securities	4,293,000		'	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	23,680,000		'	25,072,000		25,288,000		'	'
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	58,787,000		'	27,557,000		30,081,000		'	'
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	'		'	26,486,000		26,442,000		'	'
Contractual Yield, Minimum [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Time deposits	0.0001		'	0.0001		0.0001		'	'
Other borrowings	0.0025		'	0.0009		0.0009		'	'
Subordinated debentures	0.0095		'	0.01		0.0112		'	'
Contractual Yield, Minimum [Member] | Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0025		'	0.0021		0.0025		'	'
Contractual Yield, Minimum [Member] | Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0038		'	0.0021		0.0038		'	'
Contractual Yield, Minimum [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0038		'	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		0.0038		'	'
Contractual Yield, Maximum [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Time deposits	0.0964		'	0.0964		0.0964		'	'
Other borrowings	0.0478		'	0.0525		0.0525		'	'
Subordinated debentures	0.05		'	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		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		0.18		'	'
Contractual Yield, Maximum [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.18		'	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		0.21		'	'
Average Repricing [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Time deposits	2.08		'	2.15		2.14		'	'
Other borrowings	0		'	0		0		'	'
Subordinated debentures	2.87		'	3.56		3.79		'	'
Average Repricing [Member] | Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.46		'	0.69		0.64		'	'
Average Repricing [Member] | Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.79		'	0.92		0.93		'	'
Average Repricing [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	2.56		'	3.34		3.31		'	'
Average Repricing [Member] | Consumer [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.55		'	0.32		0.32		'	'
Discount Rate, Minimum [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Time deposits	0.0075		'	0.008		0.0085		'	'
Other borrowings	0.0006		'	0.0009		0.0009		'	'
Subordinated debentures	0.0222		'	0.024		0.0226		'	'
Discount Rate, Minimum [Member] | Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.005		'	0.0051		0.0058		'	'
Discount Rate, Minimum [Member] | Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.012		'	0.0126		0.013		'	'
Discount Rate, Minimum [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0064		'	0.0086		0.0099		'	'
Discount Rate, Minimum [Member] | Consumer [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0124		'	0.0137		0.0143		'	'
Discount Rate, Maximum [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Time deposits	0.0128		'	0.0115		0.0115		'	'
Other borrowings	0.0265		'	0.0267		0.0267		'	'
Subordinated debentures	0.0222		'	0.024		0.0226		'	'
Discount Rate, Maximum [Member] | Commercial [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0419		'	0.0359		0.035		'	'
Discount Rate, Maximum [Member] | Commercial Real Estate [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.0342		'	0.0318		0.0317		'	'
Discount Rate, Maximum [Member] | Residential Mortgage [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	0.044		'	0.0309		0.0317		'	'
Discount Rate, Maximum [Member] | Consumer [Member]	'		'	'		'		'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'	'		'		'	'
Loans	$0.04		'	$0.04		$0.04		'	'
[1]	Carrying value includes $2.3 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 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.
[3]	Carrying value includes $6.2 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.

Federal_and_State_Income_Taxes2

Federal and State Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Amount [Abstract]	'	'	'	'
Federal statutory tax	$38,333	$46,771	$128,446	$145,234
Tax exempt revenue	-1,860	-1,398	-5,405	-3,996
Effect of state income taxes, net of federal benefit	2,072	3,640	8,572	10,210
Utilization of tax credits	-1,669	-718	-5,217	-3,282
Bank-owned life insurance	-871	-931	-2,749	-2,886
Reduction of tax accrual	-1,400	-950	-1,400	-950
Charitable Contribution to BOKF Foundation	-1,115	0	-1,115	0
Other, net	-29	-636	848	117
Total	$33,461	$45,778	$121,980	$144,447
Effective Income Tax Rate Reconciliation, Percent [Abstract]	'	'	'	'
Federal statutory tax (in hundredths)	35.00%	35.00%	35.00%	35.00%
Tax exempt revenue (in hundredths)	-2.00%	-1.00%	-1.00%	-1.00%
Effect of state income taxes, net of federal benefit (in hundredths)	2.00%	3.00%	2.00%	2.00%
Utilization of tax credits (in hundredths)	-1.00%	-1.00%	-1.00%	-1.00%
Bank-owned life insurance (in hundredths)	-1.00%	-1.00%	-1.00%	-1.00%
Reduction of tax accrual (in hundreths)	-1.00%	-1.00%	-1.00%	0.00%
Charitable Contribution to BOKF Foundation (in hundredths)	-1.00%	0.00%	0.00%	0.00%
Other, net (in hundredths)	0.00%	0.00%	0.00%	1.00%
Total (in hundredths)	31.00%	34.00%	33.00%	35.00%