Zions Bancorporation, National Association (ZION) 10-K 3 Mar 14 2013 FY Annual report Financial data

Document_And_Entity_Informatio

Document And Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Feb. 18, 2014	Jun. 30, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'zion	'	'
Entity Registrant Name	'ZIONS BANCORPORATION /UT/	'	'
Entity Central Index Key	'0000109380	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'Yes	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Large Accelerated Filer	'	'
Entity Public Float	'	'	$5,196,248,111
Entity Common Stock, Shares Outstanding	'	184,870,116	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$1,175,083	$1,841,907
Money market investments:	'	'
Interest-bearing deposits	8,175,048	5,978,978
Federal funds sold and security resell agreements	282,248	2,775,354
Investment securities:	'	'
Held-to-maturity, at adjusted cost (approximate fair value $609,547 and $674,741)	588,981	756,909
Available-for-sale, at fair value	3,701,886	3,091,310
Trading account, at fair value	34,559	28,290
Marketable securities, total	4,325,426	3,876,509
Loans held for sale	171,328	251,651
Loans, net of unearned income and fees:	'	'
Loans and leases	38,693,094	37,137,006
FDIC-supported loans	350,271	528,241
Total loans, net of unearned	39,043,365	37,665,247
Less allowance for loan losses	746,291	896,087
Loans, net of allowance	38,297,074	36,769,160
Other noninterest-bearing investments	855,642	855,462
Premises and equipment, net	726,372	708,882
Goodwill	1,014,129	1,014,129
Core deposit and other intangibles	36,444	50,818
Other real estate owned	46,105	98,151
Other assets	926,228	1,290,917
Total assets	56,031,127	55,511,918
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'
Noninterest-bearing demand	18,758,753	18,469,458
Interest-bearing:	'	'
Savings and Money Market	23,029,928	22,896,624
Time	2,593,038	2,962,931
Foreign	1,980,161	1,804,060
Total deposits	46,361,880	46,133,073
Securities sold, not yet purchased	73,606	26,735
Federal funds purchased and security repurchase agreements	266,742	320,478
Other short-term borrowings	0	5,409
Long-term debt	2,273,575	2,337,113
Reserve for unfunded lending commitments	89,705	106,809
Other liabilities	501,056	533,660
Total liabilities	49,566,564	49,463,277
Shareholders' equity:	'	'
Preferred stock, without par value, authorized 4,400,000 shares	1,003,970	1,128,302
Common stock, without par value; authorized 350,000,000 shares; issued and outstanding 184,677,696 and 184,199,198 shares	4,179,024	4,166,109
Retained earnings	1,473,670	1,203,815
Accumulated Other Comprehensive Income (Loss), Net of Tax	-192,101	-446,157
Controlling interest shareholders' equity	6,464,563	6,052,069
Noncontrolling interests	0	-3,428
Total shareholders' equity	6,464,563	6,048,641
Total liabilities and shareholders' equity	$56,031,127	$55,511,918

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Held-to-maturity, fair value	$609,547	$674,741
Preferred stock, authorized shares	4,400,000	4,400,000
Common stock, authorized shares	350,000,000	350,000,000
Common stock, issued shares	184,677,696	184,199,198
Common stock, outstanding shares	184,677,696	184,199,198

Consolidated_Statements_Of_Inc

Consolidated Statements Of Income (USD $)	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest income:	'	'	'
Interest and fees on loans	$1,814,600	$1,889,884	$2,049,928
Interest on money market investments	23,363	21,080	13,832
Interest on securities:	'	'	'
Held-to-maturity	31,280	34,751	35,716
Available-for-sale	71,107	92,261	87,105
Trading account	1,055	746	2,000
Total interest income	1,941,405	2,038,722	2,188,581
Interest expense:	'	'	'
Interest on deposits	58,913	80,146	128,479
Interest on short-term borrowings	313	1,406	6,685
Interest on long-term debt	185,851	225,230	297,232
Total interest expense	245,077	306,782	432,396
Net interest income	1,696,328	1,731,940	1,756,185
Provision for loan losses	-87,136	14,227	74,532
Net interest income after provision for loan losses	1,783,464	1,717,713	1,681,653
Noninterest income:	'	'	'
Service charges and fees on deposit accounts	176,339	176,401	174,435
Other service charges, commissions and fees	181,473	174,420	185,836
Trust and wealth management income	29,913	28,402	26,683
Capital markets and foreign exchange	28,051	26,810	31,407
Dividends and other investment income	46,062	55,825	42,428
Loan sales and servicing income	35,293	39,929	28,072
Fair value and nonhedge derivative loss	-18,152	-21,782	-4,980
Equity securities gains, net	8,520	11,253	6,511
Fixed income securities gains (losses), net	-2,898	19,544	11,868
Impairment losses on investment securities:	'	'	'
Impairment losses on investment securities	-188,606	-166,257	-77,325
Noncredit-related losses on securities not expected to be sold (recognized in other comprehensive income)	23,472	62,196	43,642
Net impairment losses on investment securities	-165,134	-104,061	-33,683
Other	17,940	13,129	29,607
Total noninterest income	337,407	419,870	498,184
Noninterest expense:	'	'	'
Salaries and employee benefits	912,918	885,661	874,293
Occupancy, net	112,303	112,947	112,537
Furniture, equipment, and software	106,629	108,990	105,703
Other real estate expense	1,712	19,723	77,570
Credit-related expense	33,653	50,518	61,629
Provision for unfunded lending commitments	-17,104	4,387	-9,286
Legal and professional services	67,968	52,509	38,992
Advertising	23,362	25,720	27,164
FDIC premiums	38,019	43,401	63,918
Amortization of core deposit and other intangibles	14,375	17,010	20,070
Debt extinguishment cost	120,192	0	0
Other	300,412	275,151	285,974
Total noninterest expense	1,714,439	1,596,017	1,658,564
Income before income taxes	406,432	541,566	521,273
Income taxes	142,977	193,416	198,583
Net income	263,455	348,150	322,690
Net loss applicable to noncontrolling interests	-336	-1,366	-1,114
Net income applicable to controlling interest	263,791	349,516	323,804
Preferred stock dividends	-95,512	-170,885	-170,414
Preferred stock redemption	125,700	0	0
Net earnings applicable to common shareholders	$293,979	$178,631	$153,390
Weighted average common shares outstanding during the period:	'	'	'
Basic shares	183,844	183,081	182,393
Diluted shares	184,297	183,236	182,605
Net earnings per common share:	'	'	'
Basic, per share	$1.58	$0.97	$0.83
Diluted, per share	$1.58	$0.97	$0.83

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]	'	'	'
Net income	$263,455	$348,150	$322,690
Other comprehensive income (loss), net of tax:	'	'	'
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	141,399	129,330	-77,280
Other than temporary impairment losses investments portion in other comprehensive income loss after tax	-13,751	-38,406	-26,481
Reclassification for net losses on investments included in earnings	1,775	-12,204	-7,392
Other than temporary impairment losses investments portion recognized in earnings, net after tax	99,903	63,564	20,244
Other than temporary impairment losses, investments, accretion of noncredit portion, held-to-maturity securities, after tax	1,258	6,863	410
Net unrealized losses on derivative instruments	-431	247	1,355
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	-1,580	-7,857	-22,653
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	25,483	4,390	-18,991
Other comprehensive income (loss)	254,056	145,927	-130,788
Comprehensive income (loss)	517,511	494,077	191,902
Comprehensive loss applicable to noncontrolling interests	-336	-1,366	-1,114
Comprehensive income applicable to controlling interest	$517,847	$495,443	$193,016

Consolidated_Statements_Of_Cha

Consolidated Statements Of Changes In Shareholders' Equity (USD $)	Total	Preferred Stock [Member]	Common Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]
In Thousands, except Share data, unless otherwise specified
Balance at Dec. 31, 2010	$6,647,214	$2,056,672	$4,163,619	$889,284	($461,296)	($1,065)
Balance (in shares) at Dec. 31, 2010	'	'	182,784,086	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income (loss)	322,690	'	'	323,804	'	-1,114
Other comprehensive income (loss)	-130,788	'	'	'	-130,788	'
Stock Issued During Period, Value, New Issues	25,500	'	25,048	'	'	'
Subordinated debt converted to preferred stock	256,109	299,248	-43,139	'	'	'
Stock Issued During Period, Shares, New Issues	1,100,000	'	1,067,540	'	'	'
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	'	'	283,762	'	'	'
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	17,714	'	17,714	'	'	'
Dividends on preferred stock	-148,774	21,640	'	-170,414	'	'
Dividends on common stock, $0.13 per share	-7,361	'	'	-7,361	'	'
Increase (Decrease) in Deferred Compensation	1,277	'	'	1,277	'	'
Other changes in noncontrolling interests	99	'	'	'	'	99
Balance at Dec. 31, 2011	6,983,228	2,377,560	4,163,242	1,036,590	-592,084	-2,080
Balance (in shares) at Dec. 31, 2011	'	'	184,135,388	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income (loss)	348,150	'	'	349,516	'	-1,366
Other comprehensive income (loss)	145,927	'	'	'	145,927	'
Stock Issued During Period, Value, New Issues	141,342	143,750	-2,408	'	'	'
Preferred stock redemption	1,542,500	1,542,500	-3,830	3,830	'	'
Subordinated debt converted to preferred stock	89,564	104,796	-15,232	'	'	'
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	'	'	63,810	'	'	'
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	16,677	'	16,677	'	'	'
Dividends on preferred stock	-126,189	44,696	'	-170,885	'	'
Dividends on common stock, $0.13 per share	-7,392	'	'	-7,392	'	'
Increase (Decrease) in Deferred Compensation	-184	'	'	-184	'	'
Other changes in noncontrolling interests	18	'	'	'	'	'
Balance at Dec. 31, 2012	6,048,641	1,128,302	4,166,109	1,203,815	-446,157	-3,428
Balance (in shares) at Dec. 31, 2012	184,199,198	'	184,199,198	'	'	'
Increase (Decrease) in Stockholders' Equity [Roll Forward]	'	'	'	'	'	'
Net income (loss)	263,455	'	'	263,791	'	-336
Other comprehensive income (loss)	254,056	'	'	'	254,056	'
Stock Issued During Period, Value, New Issues	784,318	800,000	-15,682	'	'	'
Preferred stock redemption	-799,468	-925,748	580	125,700	'	'
Subordinated debt converted to preferred stock	1,210	1,416	-206	'	'	'
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures	'	'	478,498	'	'	'
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures	32,389	'	32,389	'	'	'
Dividends on preferred stock	-95,512	'	'	-95,512	'	'
Dividends on common stock, $0.13 per share	-24,094	'	'	-24,094	'	'
Increase (Decrease) in Deferred Compensation	-30	'	'	-30	'	'
Other changes in noncontrolling interests	-402	'	-4,166	'	'	3,764
Balance at Dec. 31, 2013	$6,464,563	$1,003,970	$4,179,024	$1,473,670	($192,101)	$0
Balance (in shares) at Dec. 31, 2013	184,677,696	'	184,677,696	'	'	'

Consolidated_Statements_Of_Cha1

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Stockholders' Equity [Abstract]	'	'	'
Dividends on common stock, per share	$0	$0.04	$0.04

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES	'	'	'
Net income (loss)	$263,455	$348,150	$322,690
Debt extinguishment cost	120,192	0	0
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'
Net impairment losses on investment securities, goodwill, and long-lived assets	165,134	106,545	35,686
Provision for credit losses	-104,240	18,614	65,246
Depreciation and amortization	130,616	185,185	240,485
Deferred income tax expense (benefit)	-60,117	9,788	115,604
Net write-down of and gains or losses from sales of other real estate owned	-3,681	17,166	58,676
Net increase (decrease) in trading securities	-6,286	11,983	8,394
Net decrease in loans held for sale	116,624	-31,445	50,696
Change in other liabilities	-2,051	27,439	19,370
Change in other assets	255,564	71,772	153,592
Other, net	1,356	-29,002	-1,691
Net cash provided by operating activities	876,566	736,195	1,068,748
CASH FLOWS FROM INVESTING ACTIVITIES	'	'	'
Net increase in money market investments	297,036	-1,631,278	-2,416,741
Proceeds from maturities and paydowns of investment securities held-to-maturity	130,938	128,278	101,893
Purchases of investment securities held-to-maturity	-155,328	-86,790	-69,171
Proceeds from sales, maturities, and paydowns of investment securities available-for-sale	1,104,010	1,212,047	2,206,881
Purchases of investment securities available-for-sale	-1,325,704	-932,034	-1,423,141
Proceeds from sales of loans and leases	17,748	66,223	17,609
Net loan and lease collections (originations)	1,506,233	792,025	1,185,688
Net decrease in other noninterest-bearing investments	19,109	40,014	19,407
Net purchases of premises and equipment	-88,580	-68,894	-77,669
Proceeds from sales of other real estate owned	110,058	204,818	362,495
Net cash received (paid for) divestitures	3,786	-19,901	0
Net cash used in investing activities	-1,393,160	-1,879,542	-2,464,125
CASH FLOWS FROM FINANCING ACTIVITIES	'	'	'
Net increase (decrease) in deposits	228,807	3,286,823	1,940,697
Net change in short-term funds borrowed	-12,274	-370,264	-208,541
Proceeds from issuance of long-term debt	646,408	757,610	106,065
Repayments of long-term debt	-832,122	-372,891	-8,663
Payments of Debt Extinguishment Costs	-45,812	0	0
Cash paid for preferred stock redemption	-799,468	-1,542,500	0
Proceeds from Issuance or sale of equity	794,143	143,240	25,686
Dividends paid on common and preferred stock	-119,660	-133,581	-156,135
Other, net	-10,252	-7,533	-3,508
Net cash provided by financing activities	-150,230	1,760,904	1,695,601
Net increase (decrease) in cash and due from banks	-666,824	617,557	300,224
Cash and due from banks at beginning of period	1,841,907	1,224,350	924,126
Cash and due from banks at end of period	1,175,083	1,841,907	1,224,350
Cash paid for interest	191,897	214,673	263,338
Net cash paid (refunds received) for income taxes	$181,318	$183,348	$3,743

Summary_Of_Significant_Account

Summary Of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	'
	Business
	Zions Bancorporation (“the Parent”) is a financial holding company headquartered in Salt Lake City, Utah, which provides a full range of banking and related services through its subsidiary banks in ten Western and Southwestern states as follows: Zions First National Bank (“Zions Bank”), in Utah and Idaho; California Bank & Trust (“CB&T”); Amegy Corporation (“Amegy”) and its subsidiary, Amegy Bank, in Texas; National Bank of Arizona (“NBAZ”); Nevada State Bank (“NSB”); Vectra Bank Colorado (“Vectra”), in Colorado and New Mexico; The Commerce Bank of Washington (“TCBW”); and The Commerce Bank of Oregon (“TCBO”). The Parent and its subsidiary banks also own and operate certain nonbank subsidiaries that engage in financial services.
	Basis of Financial Statement Presentation
	The consolidated financial statements include the accounts of the Parent and its majority-owned subsidiaries (“the Company,” “we,” “our,” “us”). Unconsolidated investments in which there is a greater than 20% ownership are accounted for by the equity method of accounting; those in which there is less than 20% ownership are accounted for under cost, fair value, or equity methods of accounting. All significant intercompany accounts and transactions have been eliminated in consolidation.
	The consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and prevailing practices within the financial services industry. References to GAAP as promulgated by the Financial Accounting Standards Board (“FASB”) are made according to sections of the Accounting Standards Codification (“ASC”) and to Accounting Standards Updates (“ASU”).
	In preparing the consolidated financial statements, we are required to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
	Prior Year Reclassifications
	Certain amounts in 2011 have been reclassified to conform with the current year presentation. Certain credit card interchange fees were reclassified from interest and fees on loans to other service charges, commissions and fees. Income from factored receivables was reclassified from other service charges, commissions and fees to interest and fees on loans. The net effect decreased interest and fees on loans by $16.3 million in 2011 and increased other service charges, commissions and fees by the same amount. There was no effect on the balance sheet. The changes were made primarily to conform with prevailing reporting practices in the banking industry. Affected balances for 2011 in this Form 10-K have been adjusted where appropriate. There was no change in 2011 net earnings.
	Variable Interest Entities
	A variable interest entity (“VIE”) is consolidated when a company is the primary beneficiary of the VIE. Current accounting guidance requires continuous analysis on a qualitative rather than a quantitative basis to determine the primary beneficiary of a VIE. At the commencement of our involvement and periodically thereafter, we consider our consolidation conclusions for all entities with which we are involved. As of December 31, 2013, no VIEs have been consolidated in the Company’s financial statements.
	Statement of Cash Flows
	For purposes of presentation in the consolidated statements of cash flows, “cash and cash equivalents” are defined as those amounts included in cash and due from banks in the consolidated balance sheets.
	Security Resell Agreements
	Security resell agreements represent overnight and term agreements with the majority maturing within 30 days. These agreements are generally treated as collateralized financing transactions and are carried at amounts at which the securities were acquired plus accrued interest. Either the Company, or in some instances third parties on its behalf, take possession of the underlying securities. The fair value of such securities is monitored throughout the contract term to ensure that asset values remain sufficient to protect against counterparty default. We are permitted by contract to sell or repledge certain securities that we accept as collateral for security resell agreements. If sold, our obligation to return the collateral is recorded as a liability and included in the balance sheet as securities sold, not yet purchased. At December 31, 2013, we did not hold any securities for which we were permitted by contract to sell or repledge. Security resell agreements averaged approximately $675 million during 2013, and the maximum amount outstanding at any month-end during 2013 was approximately $2.3 billion.
	Investment Securities
	We classify our investment securities according to their purpose and holding period. Gains or losses on the sale of securities are recognized using the specific identification method and recorded in noninterest income.
	Held-to-maturity (“HTM”) debt securities are stated at adjusted cost, net of unamortized premiums and unaccreted discounts. The Company has the intent and ability to hold such securities until recovery of their amortized cost basis. However, see further discussion in Note 6 regarding the Company’s change in intent prior to December 31, 2013 for certain CDO securities.
	Available-for-sale (“AFS”) securities are stated at fair value and generally consist of debt securities held for investment and marketable equity securities not accounted for under the equity method. Unrealized gains and losses of AFS securities, after applicable taxes, are recorded as a component of other comprehensive income (“OCI”).
	We review quarterly our investment securities portfolio for any declines in value that are considered to be other-than-temporary impairment (“OTTI”). The process, methodology and factors considered to evaluate securities for OTTI are discussed further in Note 6. Noncredit-related OTTI on securities we intend to sell and credit-related OTTI regardless of intent is recognized in earnings. OTTI is recognized as a realized loss through earnings when our best estimate of discounted cash flows expected to be collected is less than our amortized cost basis. Noncredit-related OTTI on securities not expected to be sold is recognized in OCI.
	Trading securities are stated at fair value and consist of securities acquired for short-term appreciation or other trading purposes. Realized and unrealized gains and losses are recorded in trading income, which is included in capital markets and foreign exchange.
	The fair values of investment securities, as estimated under current accounting guidance, are discussed in Notes 8 and 21.
	Loans and Allowance for Credit Losses
	Loans are reported at the principal amount outstanding, net of unearned income. Unearned income, which includes deferred fees net of deferred direct loan origination costs, is amortized to interest income over the life of the loan using the interest method. Interest income is recognized on an accrual basis.
	At the time of origination, we determine whether loans will be held for investment or held for sale. We may subsequently change our intent to hold loans for investment and reclassify them as held for sale. Loans held for sale are carried at the lower of aggregate cost or fair value. A valuation allowance is recorded when cost exceeds fair value based on reviews at the time of reclassification and periodically thereafter. Gains and losses are recorded in noninterest income based on the difference between sales proceeds and carrying value.
	Loans that become other than current with respect to contractual payments due may be accounted for separately depending on the status of the loan, which is determined from certain credit quality indicators and analysis under the circumstances. The loan status includes past due, nonaccrual, impaired, modified, and restructured (including troubled debt restructurings). Our accounting policies for these loan types and our estimation of the related allowance for loan losses are discussed further in Note 7.
	Certain purchased loans require separate accounting procedures that are also discussed in Note 7.
	The allowance for credit losses includes the allowance for loan losses and the reserve for unfunded lending commitments, and represents our estimate of losses inherent in the loan portfolio that may be recognized from loans and lending commitments that are not recoverable. Further discussion of our estimation process for the allowance for credit losses is included in Note 7.
	Other Real Estate Owned
	Other real estate owned (“OREO”) consists principally of commercial and residential real estate obtained in partial or total satisfaction of loan obligations. Amounts are recorded at the lower of cost or fair value (less any selling costs) based on property appraisals at the time of transfer and periodically thereafter.
	Nonmarketable Investments
	Nonmarketable investments, including private equity investments, are included in other noninterest-bearing investments on the balance sheet. These investments include venture capital securities and securities acquired for various debt and regulatory requirements. See further discussion in Note 21.
	Certain nonmarketable venture capital securities are accounted for under the equity method and reported at estimated fair values in the absence of readily ascertainable fair values. Changes in fair value and gains and losses from sales are recognized in noninterest income. The values assigned to the securities where no market quotations exist are based upon available information and may not necessarily represent amounts that will ultimately be realized. Such estimated amounts depend on future circumstances and will not be realized until the individual securities are liquidated.
	Other nonmarketable investments, including private equity investments and those acquired for various debt and regulatory requirements, are accounted for at cost. Periodic reviews are conducted for impairment by comparing carrying values with estimates of fair value determined according to the previous discussion.
	Premises and Equipment
	Premises and equipment are stated at cost, net of accumulated depreciation and amortization. Depreciation, computed primarily on the straight-line method, is charged to operations over the estimated useful lives of the properties, generally 25 to 40 years for buildings, 3 to 10 years for furniture and equipment, 3 to 5 years for software, and 10 years for software capitalized for the Company’s new lending and deposit systems. Leasehold improvements are amortized over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter.
	Business Combinations
	Business combinations are accounted for under the purchase method of accounting. Upon initially obtaining control, we recognize 100% of all acquired assets and all assumed liabilities regardless of the percentage owned. The assets and liabilities are recorded at their estimated fair values, with goodwill being recorded when such fair values are less than the cost of acquisition. Certain transaction and restructuring costs are expensed as incurred. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill over the measurement period, which cannot exceed one year from the acquisition date. Results of operations of the acquired business are included in our statement of income from the date of acquisition.
	Goodwill and Identifiable Intangible Assets
	Goodwill and intangible assets deemed to have indefinite lives are not amortized. We subject these assets to annual specified impairment tests as of the beginning of the fourth quarter and more frequently if changing conditions warrant. Core deposit assets and other intangibles with finite useful lives are generally amortized on an accelerated basis using an estimated useful life of up to 12 years.
	Derivative Instruments
	We use derivative instruments, including interest rate swaps and floors and basis swaps, as part of our overall interest rate risk management strategy. These instruments enable us to manage to desired asset and liability duration and to reduce interest rate exposure by matching estimated repricing periods of interest-sensitive assets and liabilities. We also execute derivative instruments with commercial banking customers to facilitate their risk management strategies. These derivatives are immediately hedged by offsetting derivatives such that we minimize our net risk exposure as a result of such transactions. We record all derivatives at fair value in the balance sheet as either other assets or other liabilities. See further discussion in Note 8.
	Commitments and Letters of Credit
	In the ordinary course of business, we enter into commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for unfunded lending commitments is presented separately in the balance sheet.
	Share-Based Compensation
	Share-based compensation generally includes grants of stock options, restricted stock, and other awards to employees and nonemployee directors. We recognize the share-based awards in the statement of income based on their fair values. See further discussion in Note 17.
	Income Taxes
	Deferred tax assets and liabilities are determined based on temporary differences between financial statement asset and liability amounts and their respective tax bases and are measured using enacted tax laws and rates. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are recognized subject to management’s judgment that realization is more-likely-than-not. Unrecognized tax benefits for uncertain tax positions relate primarily to state tax contingencies. See further discussion in Note 15.
	Net Earnings Per Common Share
	Net earnings per common share is based on net earnings applicable to common shareholders, which is net of preferred stock dividends. Basic net earnings per common share is based on the weighted average outstanding common shares during each year. Unvested share-based awards with rights to receive nonforfeitable dividends are considered participating securities and included in the computation of basic earnings per share. Diluted net earnings per common share is based on the weighted average outstanding common shares during each year, including common stock equivalents (such as warrants, stock options and restricted stock). Diluted net earnings per common share excludes common stock equivalents whose effect is antidilutive. See further discussion in Note 16.

Other_Recent_Accounting_Pronou

Other Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2013
Other Recent Accounting Pronouncements [Abstract]	'
Certain Recent Accounting Pronouncements [Text Block]	'
	2	CERTAIN RECENT ACCOUNTING PRONOUNCEMENTS
	In January 2014, the FASB issued ASU 2014-04, Reclassification of Residential Real Estate Collateralized Consumer Mortgage Loans upon Foreclosure. This new guidance under ASU 310-40, Receivables – Trouble Debt Restructurings by Creditors, clarifies that a creditor should be considered to have physical possession of a residential real estate property collateralizing a residential mortgage loan and thus would reclassify the loan to other real estate owned when certain conditions are satisfied. The new amendments will require additional financial statement disclosures and may be applied on either a prospective or a modified retrospective basis, with early adoption permitted. For public companies, adoption is required for interim or annual periods beginning after December 15, 2014. Management is currently evaluating the impact this new guidance may have on its financial statement disclosures.
	In January 2014, the FASB issued ASU 2014-1, Accounting for Investments in Qualified Affordable Housing Projects. This new accounting guidance under ASC 323, Investments – Equity Method and Joint Ventures, revised the conditions that an entity must meet to elect to use the effective yield method when accounting for qualified affordable housing project investments. The final consensus changed the method of amortizing a Low Income Housing Tax Credit (“LIHTC”) investment from the effective yield method to a proportional amortization method. The amortization would be proportional to the tax credits and tax benefits received but, under a practical expedient that would be available in certain circumstances, amortization could be proportional to only the tax credits. Reporting entities that invest in LIHTC investments through a limited liability entity could elect the proportional amortization method if certain conditions are met. The guidance would not extend to other types of tax credit investments. The final consensus would be applied retrospectively with early adoption and other adjustments permitted. For public companies, adoption is required for interim or annual periods beginning after December 15, 2014. Management is currently evaluating the impact this new guidance may have on its financial statements.
	Additional recent accounting pronouncements are discussed where applicable in the Notes to Consolidated Financial Statements.

Merger_And_Acquisition_Activit

Merger And Acquisition Activity	12 Months Ended
	Dec. 31, 2013
Business Combinations [Abstract]	'
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	'
	3	MERGER AND ACQUISITION ACTIVITY
	In August 2011, we recognized a $5.5 million gain in other noninterest income from the sale of BServ, Inc. (dba BankServ) stock. We acquired the stock of this privately-owned company when we sold substantially all of the assets of our NetDeposit subsidiary in September 2010. Similar to BankServ, NetDeposit specialized in remote deposit capture and electronic payment technologies.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Supplemental Cash Flow Information	'
	SUPPLEMENTAL CASH FLOW INFORMATION
	Noncash activities are summarized as follows:
	(In thousands)	Year Ended December 31,
		2013		2012		2011
	Loans transferred to other real estate owned	$	60,749	$	172,018	$	301,454
	Loans and leases transferred to loans held for sale	36,301		—		31,936
	Beneficial conversion feature transferred from common stock to preferred stock as a result of subordinated debt conversions	206		15,232		43,139
	Subordinated debt converted to preferred stock	1,210		89,564		256,109
	Preferred stock transferred to common stock as a result of the Series C preferred stock redemption	580		—		—
	Preferred stock/beneficial conversion feature transferred to retained earnings as result of the Series C preferred stock redemption	125,700		—		—
	Amortized cost of HTM securities transferred to AFS securities	181,915		—		—

Cash_and_Money_Market_Investme

Cash and Money Market Investments	12 Months Ended
	Dec. 31, 2013
Gross and net information for selecting financial instruments [Abstract]	'
Cash, Cash Equivalents, and Short-term Investments [Text Block]	'
	5	CASH AND MONEY MARKET INVESTMENTS
	Effective January 1, 2013, we adopted ASU 2013-01, Clarifying the Scope of Disclosures about Offsetting Assets and Liabilities, which limited the scope of ASU 2011-11, Disclosures about Offsetting Assets and Liabilities. This new guidance under ASC 210, Balance Sheet, applies to the offsetting of derivatives (including bifurcated embedded derivatives), repurchase agreements and reverse repurchase (or resell) agreements, and securities borrowing and lending transactions. The new guidance requires entities to present both gross and net information about these financial instruments, including those subject to a master netting arrangement. The change in disclosure is required on a retrospective basis for all prior periods presented.
	Security resell and repurchase agreements are offset in the balance sheet according to master netting agreements. Derivative instruments may be offset under their master netting agreements; however, for accounting purposes, we present these items on a gross basis in the Company’s balance sheet. See Note 8 for further information regarding derivative instruments.
	Gross and net information for selected financial instruments in the balance sheet is as follows:
			December 31, 2013
	(In thousands)									Gross amounts not offset in the balance sheet
	Description		Gross amounts recognized		Gross amounts offset in the balance sheet			Net amounts presented in the balance sheet		Financial instruments			Cash collateral received/pledged			Net amount
	Assets:
	Federal funds sold and security resell agreements		$	282,248	$	—		$	282,248	$	—		$	—		$	282,248
	Derivatives (included in other assets)		65,683		—			65,683		(11,650		)	2,210			56,243
			$	347,931	$	—		$	347,931	$	(11,650	)	$	2,210		$	338,491
	Liabilities:
	Federal funds purchased and security repurchase agreements		$	266,742	$	—		$	266,742	$	—		$	—		$	266,742
	Derivatives (included in other liabilities)		68,397		—			68,397		(11,650		)	(26,997		)	29,750
			$	335,139	$	—		$	335,139	$	(11,650	)	$	(26,997	)	$	296,492
			December 31, 2012
	(In thousands)									Gross amounts not offset in the balance sheet
	Description		Gross amounts recognized		Gross amounts offset in the balance sheet			Net amounts presented in the balance sheet		Financial instruments			Cash collateral received/pledged			Net amount
	Assets:
	Federal funds sold and security resell agreements		$	3,675,354	$	(900,000	)	$	2,775,354	$	—		$	—		$	2,775,354
	Derivatives (included in other assets)		86,214		—			86,214		(409		)	—			85,805
			$	3,761,568	$	(900,000	)	$	2,861,568	$	(409	)	$	—		$	2,861,159
	Liabilities:
	Federal funds purchased and security repurchase agreements		$	1,220,478	$	(900,000	)	$	320,478	$	—		$	—		$	320,478
	Derivatives (included in other liabilities)		92,259		—			92,259		(409		)	(81,683		)	10,167
			$	1,312,737	$	(900,000	)	$	412,737	$	(409	)	$	(81,683	)	$	330,645

Investment_Securities

Investment Securities	12 Months Ended
	Dec. 31, 2013
Investments [Abstract]	'
Investment Securities	'
	INVESTMENT SECURITIES
	Investment securities are summarized below. Note 21 discusses the process to estimate fair value for investment securities.
		December 31, 2013
					Recognized in OCI 1											Not recognized in OCI
	(In thousands)	Amortized			Gross				Gross			Carrying				Gross			Gross				Estimated
		cost			unrealized				unrealized			value				unrealized			unrealized				fair
					gains				losses							gains			losses				value
	Held-to-maturity
	Municipal securities	$	551,055		$	—			$	—		$	551,055			$	11,295		$	4,616			$	557,734
	Asset-backed securities:
	Trust preferred securities – banks and insurance	79,419			—				41,593			37,826				15,195			1,308				51,713
	Other	—			—				—			—				—			—				—
	Other debt securities	100			—				—			100				—			—				100
		630,574			—				41,593			588,981				26,490			5,924				609,547
	Available-for-sale
	U.S. Treasury securities	1,442			104				—			1,546											1,546
	U.S. Government agencies and corporations:
	Agency securities	517,905			1,920				901			518,924											518,924
	Agency guaranteed mortgage-backed securities	308,687			9,926				1,237			317,376											317,376
	Small Business Administration loan-backed securities	1,202,901			21,129				2,771			1,221,259											1,221,259
	Municipal securities	65,425			1,329				490			66,264											66,264
	Asset-backed securities:
	Trust preferred securities – banks and insurance	1,508,224			13,439				282,843			1,238,820											1,238,820
	Trust preferred securities – real estate investment trusts	22,996			—				—			22,996											22,996
	Auction rate securities	6,507			118				26			6,599											6,599
	Other	27,540			359				—			27,899											27,899
		3,661,627			48,324				288,268			3,421,683											3,421,683
	Mutual funds and other	287,603			21				7,421			280,203											280,203
		3,949,230			48,345				295,689			3,701,886											3,701,886
	Total	$	4,579,804		$	48,345			$	337,282		$	4,290,867										$	4,311,433
		December 31, 2012
					Recognized in OCI 1											Not recognized in OCI
	(In thousands)	Amortized			Gross				Gross			Carrying				Gross			Gross				Estimated
		cost			unrealized				unrealized			value				unrealized			unrealized				fair
					gains				losses							gains			losses				value
	Held-to-maturity
	Municipal securities	$	524,738		$	—			$	—		$	524,738			$	12,837		$	709			$	536,866
	Asset-backed securities:
	Trust preferred securities – banks and insurance	255,647			—				42,964			212,683				114			86,596				126,201
	Other	21,858			—				2,470			19,388				709			8,523				11,574
	Other debt securities	100			—				—			100				—			—				100
		802,343			—				45,434			756,909				13,660			95,828				674,741
	Available-for-sale
	U.S. Treasury securities	104,313			211				—			104,524											104,524
	U.S. Government agencies and corporations:
	Agency securities	108,814			3,959				116			112,657											112,657
	Agency guaranteed mortgage-backed securities	406,928			18,598				16			425,510											425,510
	Small Business Administration loan-backed securities	1,124,322			29,245				639			1,152,928											1,152,928
	Municipal securities	75,344			2,622				1,970			75,996											75,996
	Asset-backed securities:
	Trust preferred securities – banks and insurance	1,596,156			16,687				663,451			949,392											949,392
	Trust preferred securities – real estate investment trusts	40,485			—				24,082			16,403											16,403
	Auction rate securities	6,504			79				68			6,515											6,515
	Other	25,614			701				6,941			19,374											19,374
		3,488,480			72,102				697,283			2,863,299											2,863,299
	Mutual funds and other	228,469			194				652			228,011											228,011
		3,716,949			72,296				697,935			3,091,310											3,091,310
	Total	$	4,519,292		$	72,296			$	743,369		$	3,848,219										$	3,766,051
	1	The gross unrealized losses recognized in OCI on HTM securities resulted from a previous transfer of AFS securities
	to HTM and from OTTI.
	The amortized cost and estimated fair value of investment debt securities are shown subsequently as of December 31, 2013 by expected maturity distribution for structured asset-backed collateralized debt obligations (“ABS CDOs”) and by contractual maturity distribution for other debt securities. Actual maturities may differ from expected or contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties.
		Held-to-maturity							Available-for-sale
	(In thousands)	Amortized			Estimated				Amortized			Estimated
cost			fair			cost			fair
			value						value
Due in one year or less	$	53,489		$	53,200			$	446,742		$	434,528
Due after one year through five years	197,830			202,553				1,151,262			1,126,669
Due after five years through ten years	136,754			134,360				724,261			702,395
Due after ten years	242,501			219,434				1,339,362			1,158,091
	$	630,574		$	609,547			$	3,661,627		$	3,421,683
The following is a summary of the amount of gross unrealized losses for debt securities and the estimated fair value by length of time the securities have been in an unrealized loss position:
	December 31, 2013
	Less than 12 months							12 months or more							Total
(In thousands)	Gross			Estimated				Gross			Estimated				Gross			Estimated
	unrealized			fair				unrealized			fair				unrealized			fair
	losses			value				losses			value				losses			value
Held-to-maturity
Municipal securities	$	4,025		$	70,400			$	591		$	9,103			$	4,616		$	79,503
Asset-backed securities:
Trust preferred securities – banks and insurance	—			—				42,901			51,319				42,901			51,319
Other	—			—				—			—				—			—
	4,025			70,400				43,492			60,422				47,517			130,822
Available-for-sale
U.S. Government agencies and corporations:
Agency securities	828			47,862				73			5,874				901			53,736
Agency guaranteed mortgage-backed securities	1,231			64,533				6			935				1,237			65,468
Small Business Administration loan-backed securities	1,709			187,680				1,062			39,256				2,771			226,936
Municipal securities	73			8,834				417			3,179				490			12,013
Asset-backed securities:
Trust preferred securities – banks and insurance	2,539			51,911				280,304			847,990				282,843			899,901
Trust preferred securities – real estate investment trusts	—			—				—			—				—			—
Auction rate securities	5			1,609				21			892				26			2,501
Other	—			—				—			—				—			—
	6,385			362,429				281,883			898,126				288,268			1,260,555
Mutual funds and other	943			24,057				6,478			103,614				7,421			127,671
	7,328			386,486				288,361			1,001,740				295,689			1,388,226
Total	$	11,353		$	456,886			$	331,853		$	1,062,162			$	343,206		$	1,519,048
		December 31, 2012
		Less than 12 months							12 months or more							Total
	(In thousands)	Gross unrealized losses			Estimated fair				Gross unrealized losses			Estimated fair				Gross unrealized losses			Estimated fair
					value							value							value
	Held-to-maturity
	Municipal securities	$	630		$	42,613			$	79		$	5,910			$	709		$	48,523
	Asset-backed securities:
	Trust preferred securities – banks and insurance	—			—				129,560			126,019				129,560			126,019
	Other	—			—				10,993			10,904				10,993			10,904
	Other debt securities	—			—				—			—				—			—
		630			42,613				140,632			142,833				141,262			185,446
	Available-for-sale
	U.S. Government agencies and corporations:
	Agency securities	35			18,633				81			6,916				116			25,549
	Agency guaranteed mortgage-backed securities	10			6,032				6			629				16			6,661
	Small Business Administration loan-backed securities	91			15,199				548			69,011				639			84,210
	Municipal securities	61			4,898				1,909			11,768				1,970			16,666
	Asset-backed securities:
	Trust preferred securities – banks and insurance	—			—				663,451			765,421				663,451			765,421
	Trust preferred securities – real estate investment trusts	—			—				24,082			16,403				24,082			16,403
	Auction rate securities	—			—				68			2,459				68			2,459
	Other	—			—				6,941			15,234				6,941			15,234
		197			44,762				697,086			887,841				697,283			932,603
	Mutual funds and other	652			112,324				—			—				652			112,324
		849			157,086				697,086			887,841				697,935			1,044,927
	Total	$	1,479		$	199,699			$	837,718		$	1,030,674			$	839,197		$	1,230,373
At December 31, 2013 and 2012, respectively, 157 and 84 HTM and 317 and 256 AFS investment securities were in an unrealized loss position.
Other-Than-Temporary Impairment
Ongoing Policy
We conduct a formal review of investment securities on a quarterly basis for the presence of OTTI. We assess whether OTTI is present when the fair value of a debt security is less than its amortized cost basis at the balance sheet date (the vast majority of the investment portfolio are debt securities). Under these circumstances, OTTI is considered to have occurred if (1) we intend to sell the security; (2) it is “more likely than not” we will be required to sell the security before recovery of its amortized cost basis; or (3) the present value of expected cash flows is not sufficient to recover the entire amortized cost basis.
Noncredit-related OTTI in securities we intend to sell is recognized in earnings as is any credit-related OTTI in securities, regardless of our intent. Noncredit-related OTTI on securities not expected to be sold is recognized in OCI. The amount of noncredit-related OTTI in a security is quantified as the difference in a security’s amortized cost after adjustment for credit impairment, and its lower fair value. Presentation of OTTI is made in the statement of income on a gross basis with an offset for the amount of OTTI recognized in OCI. For securities classified as HTM, the amount of noncredit-related OTTI recognized in OCI is accreted using the effective interest rate method to the credit-adjusted expected cash flow amounts of the securities over future periods.
Our OTTI evaluation process takes into consideration current market conditions; fair value in relationship to cost; extent and nature of change in fair value; severity and duration of the impairment; recent events specific to the issuer or industry; creditworthiness of the issuer, including external credit ratings, changes, recent downgrades, and trends; volatility of earnings and trends; current analysts’ evaluations; all available information relevant to the collectibility of debt securities; and other key measures. In addition, for AFS securities with fair values below amortized cost, we must determine if we intend to sell the securities or if it is more likely than not that we will be required to sell the securities before recovery of their amortized cost basis. For HTM securities, we must determine we have the ability to hold the securities to maturity. We consider any other relevant factors before concluding our evaluation for the existence of OTTI in our securities portfolio.
Additionally, under ASC 325-40, Beneficial Interests in Securitized Financial Assets, OTTI is recognized as a realized loss through earnings when there has been an adverse change in the holder’s best estimate of cash flows expected to be collected such that the entire amortized cost basis will not be received.
Effect of Volcker Rule and Interim Final Rule
Prior to December 31, 2013, we asserted that we did not intend to sell collateralized debt obligation (“CDO”) securities prior to recovery of their amortized cost basis when it exceeded fair value. We also determined that it was not more likely than not that we will be required to sell such securities before recovery of their amortized cost basis.
On December 10, 2013, five federal agencies (the Federal Reserve, Federal Deposit Insurance Corporation (“FDIC”), Office of the Comptroller of the Currency (“OCC”), Commodity Futures Trading Commission (“CFTC”), and the Securities and Exchange Commission (“SEC”) published the final Volcker Rule (“VR”) pursuant to the Dodd-Frank Act. The VR significantly restricted certain activities by covered bank holding companies, including restrictions on certain types of securities, proprietary trading, and private equity investing. On January 14, 2014, these agencies revised the VR’s application to certain CDO securities through publication of an Interim Final Rule (“IFR”) related primarily to bank trust preferred CDO securities.
Certain CDO securities backed primarily by insurance trust preferred securities, REIT securities, and ABS securities became disallowed under the VR and the IFR. This regulatory change resulted in the Company no longer being able to hold these securities to maturity. Accordingly, we reclassified the affected securities in the HTM portfolio from HTM to AFS. The amortized cost of the securities reclassified was approximately $182 million. Net unrealized losses recorded in OCI during the fourth quarter of 2013 as a result of this reclassification were approximately $24.4 million.
Within the resulting AFS portfolio, we concluded we still had the ability to hold certain disallowed insurance CDO securities to recovery of their amortized cost basis, which was $358 million at December 31, 2013. Such securities had $67 million of unrealized losses at December 31, 2013. In contrast, for $147 million at amortized cost of disallowed CDOs, primarily ABS and Real Estate Investment Trusts (“REIT”), the Company concluded recovery was unlikely prior to July 21, 2015, and determined prior to December 31, 2013 an intent to sell during the first quarter of 2014. In addition at December 31, 2013, to reduce the risk profile of the portfolio, we determined an intent to sell for certain other allowed CDO securities during the first quarter of 2014.
This formation of an intent to sell resulted in a pretax securities impairment charge of $137.1 million for CDO trust preferred securities – banks and insurance, REITs, and other asset backed CDO securities. Approximately $43.2 million of the charge related to securities which the VR and the IFR preclude the Company from holding beyond July 21, 2015. The remaining $93.9 million related to securities that we intend to sell despite being grandfathered under the VR and the IFR. See the Subsequent Event section following in this footnote which discusses the results of the subsequent sales of these CDO securities.
OTTI Conclusions
The following summarizes the conclusions from our OTTI evaluation for those security types that had significant gross unrealized losses during 2013:
OTTI – Municipal Securities
The HTM securities are purchased directly from municipalities and are generally not rated by a credit rating agency. Most of the AFS securities are rated as investment grade by various credit rating agencies. Both the HTM and AFS securities are at fixed and variable rates with maturities from one to 25 years. Fair value changes of these securities are largely driven by interest rates. We perform credit quality reviews on these securities at each reporting period. Because the decline in fair value is not attributable to credit quality, no OTTI for these securities was recorded during 2013.
OTTI – Asset-Backed Securities
Trust preferred securities – banks and insurance – These CDO securities are interests in variable rate pools of trust preferred securities issued by trusts related to bank holding companies and insurance companies (“collateral issuers”). They are rated by one or more Nationally Recognized Statistical Rating Organizations (“NRSROs”), which are rating agencies registered with the SEC. The more junior securities were purchased generally at par, while the senior securities were purchased from Lockhart Funding LLC (“Lockhart”), a previously consolidated qualifying special purpose entity securities conduit, at their carrying values (generally par) and then adjusted to their lower fair values. The primary drivers that have given rise to the unrealized losses on CDOs with bank and insurance collateral are listed below:
1)	Market yield requirements for bank CDO securities remain elevated. The financial crisis and economic downturn resulted in significant utilization of both the unique five-year deferral option, which each collateral issuer maintains during the life of the CDO, and the payment in kind feature described subsequently. The resulting increase in the rate of return demanded by the market for trust preferred CDOs remains substantially higher than the contractual interest rates. Virtually all structured asset-backed security (“ABS”) fair values, including bank CDOs, deteriorated significantly during the crisis, generally reaching a low in mid-2009. Prices for some structured products have since rebounded as the crucial unknowns related to value became resolved and as trading increased in these securities. Unlike other structured products, CDO tranches backed by bank trust preferred securities continue to be characterized by considerable uncertainty surrounding collateral behavior, specifically including, but not limited to, prepayments; the future number, size and timing of bank failures; holding company bankruptcies; and allowed deferrals and subsequent resumption of payment or default due to nonpayment of contractual interest.
2)	Structural features of the collateral make these CDO tranches difficult for market participants to model. The first feature unique to bank CDOs is the interest deferral feature previously noted. Throughout the crisis starting in 2008, certain banks within our CDO pools have exercised this prerogative. The extent to which these deferrals are likely to either transition to default or, alternatively, come current prior to the five-year deadline is extremely difficult for market participants to assess.
A second structural feature that is difficult to model is the payment in kind (“PIK”) feature, which provides that upon reaching certain levels of collateral default or deferral, certain junior CDO tranches will not receive current interest but will instead have the interest amount that is unpaid capitalized or deferred. The cash flow that would otherwise be paid to the junior CDO securities and the income notes is instead used to pay down the principal balance of the most senior CDO securities. If the current market yield required by market participants equaled the effective interest rate of a security, a market participant should be indifferent between receiving current interest and capitalizing and compounding interest for later payment. However, given the difference between current market rates and effective interest rates of the securities, market participants are not indifferent. The delay in payment caused by PIKing results in lower security fair values even if PIKing is projected to be fully cured. This feature is difficult to model and assess. It increases the risk premium the market applies to these securities.
3)	Ratings are generally below-investment-grade for even some of the most senior tranches that originally were rated AAA or the equivalent. Ratings on a number of CDO tranches vary significantly among rating agencies. The presence of a below-investment-grade rating by even a single rating agency will severely limit the pool of buyers, which causes greater illiquidity and therefore most likely a higher implicit discount rate/lower price with regard to that CDO tranche.
4)	There is a lack of consistent disclosure by each CDO’s trustee of the identity of collateral issuers; in addition, complex structures make projecting tranche return profiles difficult for nonspecialists in the product.
5)	At purchase, the expectation of cash flow variability was limited. As a result of the crisis, we have seen extreme variability of collateral performance both compared to expectations and between different pools.
Based on our ongoing review of these CDO securities and the previous discussion related to the VR and the IFR, OTTI was recorded during 2013.
OTTI – U.S. Government Agencies and Corporations
Small Business Administration (“SBA”) Loan-Backed Securities – These securities were generally purchased at premiums with maturities from five to 25 years and have principal cash flows guaranteed by the SBA. Because the decline in fair value is not attributable to credit quality, no OTTI for these securities was recorded during 2013.
The following is a tabular rollforward of the total amount of credit-related OTTI, including amounts recognized in earnings:
(In thousands)	2013										2012
	HTM			AFS				Total			HTM				AFS			Total
Balance of credit-related OTTI at beginning of year	$	(13,549	)	$	(394,494	)		$	(408,043	)	$	(6,126	)		$	(314,860	)	$	(320,986	)
Additions recognized in earnings during the year:
Credit-related OTTI not previously recognized 1	(403		)	(168		)		(571		)	(2,890		)		(5,654		)	(8,544		)
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis 2	—			(27,482		)		(27,482		)	(4,533		)		(90,984		)	(95,517		)
Subtotal of amounts recognized in earnings	(403		)	(27,650		)		(28,053		)	(7,423		)		(96,638		)	(104,061		)
Transfers from HTM to AFS	4,900			(4,900		)		—			—				—			—
Reductions for securities sold or paid off	—			47,768				47,768			—				17,004			17,004
during the year
Reductions for securities the Company intends to sell or will be required to sell before recovery of its amortized cost basis	—			202,443				202,443			—				—			—
Balance of credit-related OTTI at end of year	$	(9,052	)	$	(176,833	)		$	(185,885	)	$	(13,549	)		$	(394,494	)	$	(408,043	)
1 Relates to securities not previously impaired.
2 Relates to additional impairment on securities previously impaired.
To determine the credit component of OTTI for all security types, we utilize projected cash flows. These cash flows are credit adjusted using, among other things, assumptions for default probability and loss severity. Certain other unobservable inputs such as prepayment rate assumptions are also utilized. In addition, certain internal and external models may be utilized. See Note 21 for further discussion. To determine the credit-related portion of OTTI in accordance with applicable accounting guidance, we use the security specific effective interest rate when estimating the present value of cash flows.
For those securities with credit-related OTTI recognized in the statement of income, the amounts of pretax noncredit-related OTTI recognized in OCI were as follows:
(In thousands)	2013			2012				2011
HTM	$	16,114		$	16,718			$	20,945
AFS	7,358			45,478				22,697
	$	23,472		$	62,196			$	43,642
The following summarizes gains and losses, including OTTI, that were recognized in the statement of income:
		2013							2012							2011
	(In thousands)	Gross			Gross				Gross			Gross				Gross			Gross losses
		gains			losses				gains			losses				gains
	Investment securities:
	Held-to-maturity	$	81		$	403			$	214		$	7,423			$	229		$	769
	Available-for-sale	13,881			181,591				25,120			102,428				21,793			43,068
	Other noninterest-bearing investments:
	Nonmarketable equity securities	10,182			1,662				23,218			11,965				9,449			2,938
		24,144			183,656				48,552			121,816				31,471			46,775
	Net losses				$	(159,512	)					$	(73,264	)					$	(15,304	)
	Statement of income information:
	Net impairment losses on investment securities				$	(165,134	)					$	(104,061	)					$	(33,683	)
	Equity securities gains, net				8,520							11,253							6,511
	Fixed income securities gains (losses), net				(2,898		)					19,544							11,868
	Net losses				$	(159,512	)					$	(73,264	)					$	(15,304	)
Nontaxable interest income on securities was $13.4 million in 2013, $17.6 million in 2012, and $21.3 million in 2011.
Securities with a carrying value of $1.5 billion at both December 31, 2013 and 2012 were pledged to secure public and trust deposits, advances, and for other purposes as required by law. Securities are also pledged as collateral for security repurchase agreements.
Subsequent Event
As previously discussed, we determined as of December 31, 2013 an intent to sell certain CDO securities during the first quarter of 2014, and announced that intent in a press release on January 16, 2014. On February 12, 2014, the Company announced the sale through that date of all of the CDO securities identified for sale. In an improving market, proceeds were approximately $347 million from the sale of $631 million par value or $282 million amortized cost of CDO securities, resulting in first quarter pretax gains of $65 million.

Loans_And_Allowance_For_Credit

Loans And Allowance For Credit Losses	12 Months Ended
	Dec. 31, 2013
Loans And Allowance For Credit Losses [Abstract]	'
Loans And Allowance For Credit Losses	'
	LOANS AND ALLOWANCE FOR CREDIT LOSSES
	Loans and Loans Held for Sale
	Loans are summarized as follows according to major portfolio segment and specific loan class:
		December 31,
	(In thousands)	2013				2012
	Loans held for sale	$	171,328			$	251,651
	Commercial:
	Commercial and industrial	$	12,481,083			$	11,256,945
	Leasing	387,929				422,513
	Owner occupied	7,437,195				7,589,082
	Municipal	449,418				494,183
	Total commercial	20,755,625				19,762,723
	Commercial real estate:
	Construction and land development	2,182,821				1,939,413
	Term	8,005,837				8,062,819
	Total commercial real estate	10,188,658				10,002,232
	Consumer:
	Home equity credit line	2,133,120				2,177,680
	1-4 family residential	4,736,665				4,350,329
	Construction and other consumer real estate	324,922				321,235
	Bankcard and other revolving plans	356,240				306,428
	Other	197,864				216,379
	Total consumer	7,748,811				7,372,051
	FDIC-supported loans	350,271				528,241
	Total loans	$	39,043,365			$	37,665,247
	Land development loans included in the construction and land development loan class were $561 million at December 31, 2013, and $788 million at December 31, 2012.
	FDIC-supported loans were acquired during 2009 and are indemnified by the FDIC under loss sharing agreements. The FDIC-supported loan balances presented in the accompanying schedules include purchased credit-impaired (“PCI”) loans accounted for at their carrying values rather than their outstanding balances. See subsequent discussion under Purchased Loans.
	Loan balances are presented net of unearned income and fees, which amounted to $141.7 million at December 31, 2013 and $137.5 million at December 31, 2012.
	Owner occupied and commercial real estate (“CRE”) loans include unamortized premiums of approximately $47.2 million at December 31, 2013 and $59.3 million at December 31, 2012.
	Municipal loans generally include loans to municipalities with the debt service being repaid from general funds or pledged revenues of the municipal entity, or to private commercial entities or 501(c)(3) not-for-profit entities utilizing a pass-through municipal entity to achieve favorable tax treatment.
	Loans with a carrying value of approximately $23.0 billion at December 31, 2013 and $21.1 billion at December 31, 2012 have been pledged at the Federal Reserve and various Federal Home Loan Banks (“FHLB”) as collateral for current and potential borrowings.
	We sold loans totaling $1.6 billion in 2013, $1.7 billion in 2012, and $1.6 billion in 2011, that were previously classified as loans held for sale. Loans reclassified to loans held for sale primarily consist of conforming residential mortgages. Amounts added to loans held for sale during these years were $1.5 billion, $1.7 billion, and $1.6 billion, respectively. Income from loans sold, excluding servicing, was $24.1 million in 2013, $30.7 million in 2012, and $17.5 million in 2011.
	Allowance for Credit Losses
	The allowance for credit losses (“ACL”) consists of the allowance for loan and lease losses (“ALLL”) (also referred to as the allowance for loan losses) and the reserve for unfunded lending commitments (“RULC”).
	Allowance for Loan and Lease Losses
	The ALLL represents our estimate of probable and estimable losses inherent in the loan and lease portfolio as of the balance sheet date. Losses are charged to the ALLL when recognized. Generally, commercial loans are charged off or charged down at the point at which they are determined to be uncollectible in whole or in part, or when 180 days past due, unless the loan is well secured and in the process of collection. Consumer loans are either charged off or charged down to net realizable value no later than the month in which they become 180 days past due. Closed-end loans that are not secured by residential real estate are either charged off or charged down to net realizable value no later than the month in which they become 120 days past due. We establish the amount of the ALLL by analyzing the portfolio at least quarterly, and we adjust the provision for loan losses so the ALLL is at an appropriate level at the balance sheet date.
	We determine our ALLL as the best estimate within a range of estimated losses. The methodologies we use to estimate the ALLL depend upon the impairment status and portfolio segment of the loan. The methodology for impaired loans is discussed subsequently. For the commercial and CRE segments, we use a comprehensive loan grading system to assign probability of default (“PD”) and loss given default (“LGD”) grades to each loan. The credit quality indicators discussed subsequently are based on this grading system. PD and LGD grades are based on both financial and statistical models and loan officers’ judgment. We create groupings of these grades for each subsidiary bank and loan class and calculate historic loss rates using a loss migration analysis that attributes historic realized losses to these loan grade groupings over the period of January 2008 through the most recent full quarter.
	For the consumer loan segment, we use roll rate models to forecast probable inherent losses. Roll rate models measure the rate at which consumer loans migrate from one delinquency category to the next worse delinquency category, and eventually to loss. We estimate roll rates for consumer loans using recent delinquency and loss experience by segmenting our consumer loan portfolio into separate pools based on common risk characteristics and separately calculating historical delinquency and loss experience for each pool. These roll rates are then applied to current delinquency levels to estimate probable inherent losses. Roll rates incorporate housing market trends inasmuch as these trends manifest themselves in charge-offs and delinquencies. In addition, our qualitative and environmental factors discussed subsequently incorporate the most recent housing market trends.
	For FDIC-supported loans purchased with evidence of credit deterioration, we determine the ALLL according to separate accounting guidance. The accounting for these loans, including the allowance calculation, is described in the Purchased Loans section following.
	The current status and historical changes in qualitative and environmental factors may not be reflected in our quantitative models. Thus, after applying historical loss experience, as described above, we review the quantitatively derived level of ALLL for each segment using qualitative criteria and use those criteria to determine our estimate within the range. We track various risk factors that influence our judgment regarding the level of the ALLL across the portfolio segments. These factors primarily include:
	•	Asset quality trends
	•	Risk management and loan administration practices
	•	Risk identification practices
	•	Effect of changes in the nature and volume of the portfolio
	•	Existence and effect of any portfolio concentrations
	•	National economic and business conditions
	•	Regional and local economic and business conditions
	•	Data availability and applicability
	•	Effects of other external factors
	The magnitude of the impact of these factors on our qualitative assessment of the ALLL changes from quarter to quarter according to the extent these factors are already reflected in historic loss rates and according to the extent these factors diverge from one to another. We also consider the uncertainty inherent in the estimation process when evaluating the ALLL.
	Reserve for Unfunded Lending Commitments
	We also estimate a reserve for potential losses associated with off-balance sheet commitments and standby letters of credit. We determine the RULC using the same procedures and methodologies that we use for the ALLL. The loss factors used in the RULC are the same as the loss factors used in the ALLL, and the qualitative adjustments used in the RULC are the same as the qualitative adjustments used in the ALLL. We adjust the Company’s unfunded lending commitments that are not unconditionally cancelable to an outstanding amount equivalent using credit conversion factors and we apply the loss factors to the outstanding equivalents.
	Changes in ACL Assumptions
	We regularly evaluate the appropriateness of our loss estimation methods to reduce differences between estimated incurred losses and actual losses. During the third quarter of 2013, we changed certain assumptions, including the credit conversion factors, in our RULC estimation process, specifically the rate at which unfunded commitments are likely to convert into funded balances. This change resulted in a decrease of $18.4 million to the provision for unfunded lending commitments during that quarter. Additionally during the third quarter of 2013, we made refinements to our risk grading methodology for certain smaller balance loans to be more consistent with regulatory guidance and the manner in which those loans are managed. These refinements decreased the classified loan balances by approximately $137 million and did not have a material effect on the overall level of the ACL or the provision for loan losses.
	During the second quarter of 2013, we changed certain assumptions in our ACL estimation process including our loss migration model that we use to quantitatively estimate the ALLL and RULC for the commercial and commercial real estate segments. Prior to the second quarter of 2013, we used loss migration models based on loss experience over the most recent 60 months. During the second quarter of 2013 and subsequently, the loss migration models are based on loss experience from January 2008 through the most recent full quarter. We extended the period of loss experience to include the beginning of the year 2008 to encompass the last economic downturn period, as the improving charge-off rates experienced during recent periods may not be reflective of current incurred losses, given the environment of continued economic uncertainty. These refinements in the quantitative portion of the ACL did not have a material effect on the overall level of the ACL or the provision for loan losses.
	Changes in the ACL are summarized as follows:
		31-Dec-13
	(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
						real estate							supported 1
	Allowance for loan losses
	Balance at beginning of year	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
	Additions:
	Provision for loan losses	(5,640		)		(63,544		)		(19,100		)	1,148			(87,136		)
Adjustment for FDIC-supported loans	—				—				—			(11,237		)	(11,237		)
Deductions:
Gross loan and lease charge-offs	(75,434		)		(24,609		)		(28,960		)	(1,794		)	(130,797		)
Recoveries	35,311				24,540				13,269			6,254			79,374
Net loan and lease charge-offs	(40,123		)		(69		)		(15,691		)	4,460			(51,423		)
Balance at end of year	$	465,145			$	213,363			$	60,865		$	6,918		$	746,291
Reserve for unfunded lending commitments
Balance at beginning of year	$	67,374			$	37,852			$	1,583		$	—		$	106,809
Provision charged (credited) to earnings	(19,029		)		(367		)		2,292			—			(17,104		)
Balance at end of year	$	48,345			$	37,485			$	3,875		$	—		$	89,705
Total allowance for credit losses
Allowance for loan losses	$	465,145			$	213,363			$	60,865		$	6,918		$	746,291
Reserve for unfunded lending commitments	48,345				37,485				3,875			—			89,705
Total allowance for credit losses	$	513,490			$	250,848			$	64,740		$	6,918		$	835,996
	31-Dec-12
(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
					real estate							supported 1
Allowance for loan losses
Balance at beginning of year	$	561,351			$	343,747			$	123,115		$	23,472		$	1,051,685
Additions:
Provision for loan losses	16,808				(18,982		)		18,389			(1,988		)	14,227
Adjustment for FDIC-supported loans	—				—				—			(14,542		)	(14,542		)
Deductions:
Gross loan and lease charge-offs	(117,506		)		(82,944		)		(60,273		)	(6,466		)	(267,189		)
Recoveries	50,255				35,155				14,425			12,071			111,906
Net loan and lease charge-offs	(67,251		)		(47,789		)		(45,848		)	5,605			(155,283		)
Balance at end of year	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
Reserve for unfunded lending commitments
Balance at beginning of year	$	77,232			$	23,572			$	1,618		$	—		$	102,422
Provision charged (credited) to earnings	(9,858		)		14,280				(35		)	—			4,387
Balance at end of year	$	67,374			$	37,852			$	1,583		$	—		$	106,809
Total allowance for credit losses
Allowance for loan losses	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
Reserve for unfunded lending commitments	67,374				37,852				1,583			—			106,809
Total allowance for credit losses	$	578,282			$	314,828			$	97,239		$	12,547		$	1,002,896
1 The Purchased Loans section following contains further discussion related to FDIC-supported loans.
During the first quarter of 2013, we modified the reporting of certain ALLL balances in the previous schedules. This change in reporting resulted in the reclassification of approximately $83.2 million at December 31, 2012 of ALLL balances from the commercial to the commercial real estate loan segments. There was no change to the methodology or assumptions used to estimate the ALLL, nor was the change the result of any changes in credit quality.
The ALLL and outstanding loan balances according to the Company’s impairment method are summarized as follows:
	December 31, 2013
(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
					real estate							supported
Allowance for loan losses
Individually evaluated for impairment	$	39,288			$	12,510			$	10,701		$	—		$	62,499
Collectively evaluated for impairment	425,857				200,853				50,164			392			677,266
Purchased loans with evidence of credit deterioration	—				—				—			6,526			6,526
Total	$	465,145			$	213,363			$	60,865		$	6,918		$	746,291
Outstanding loan balances
Individually evaluated for impairment	$	315,604			$	262,907			$	101,545		$	1,224		$	681,280
Collectively evaluated for impairment	20,440,021				9,925,751				7,647,266			37,963			38,051,001
Purchased loans with evidence of credit deterioration	—				—				—			311,084			311,084
Total	$	20,755,625			$	10,188,658			$	7,748,811		$	350,271		$	39,043,365
	December 31, 2012
(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
					real estate							supported
Allowance for loan losses
Individually evaluated for impairment	$	30,587			$	22,295			$	13,758		$	—		$	66,640
Collectively evaluated for impairment	480,321				254,681				81,898			422			817,322
Purchased loans with evidence of credit deterioration	—				—				—			12,125			12,125
Total	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
Outstanding loan balances
Individually evaluated for impairment	$	353,380			$	437,647			$	112,320		$	1,149		$	904,496
Collectively evaluated for impairment	19,409,343				9,564,585				7,259,731			57,896			36,291,555
Purchased loans with evidence of credit deterioration	—				—				—			469,196			469,196
Total	$	19,762,723			$	10,002,232			$	7,372,051		$	528,241		$	37,665,247
Nonaccrual and Past Due Loans
Loans are generally placed on nonaccrual status when payment in full of principal and interest is not expected, or the loan is 90 days or more past due as to principal or interest, unless the loan is both well secured and in the process of collection. Factors we consider in determining whether a loan is placed on nonaccrual include delinquency status, collateral value, borrower or guarantor financial statement information, bankruptcy status, and other information which would indicate that the full and timely collection of interest and principal is uncertain.
A nonaccrual loan may be returned to accrual status when all delinquent interest and principal become current in accordance with the terms of the loan agreement; the loan, if secured, is well secured; the borrower has paid according to the contractual terms for a minimum of six months; and analysis of the borrower indicates a reasonable assurance of the ability and willingness to maintain payments. Payments received on nonaccrual loans are applied as a reduction to the principal outstanding.
Closed-end loans with payments scheduled monthly are reported as past due when the borrower is in arrears for two or more monthly payments. Similarly, open-end credit such as charge-card plans and other revolving credit plans are reported as past due when the minimum payment has not been made for two or more billing cycles. Other multi-payment obligations (i.e., quarterly, semiannual, etc.), single payment, and demand notes are reported as past due when either principal or interest is due and unpaid for a period of 30 days or more.
Nonaccrual loans are summarized as follows:
	December 31,
(In thousands)	2013				2012
Commercial:
Commercial and industrial	$	97,960			$	90,859
Leasing	757				838
Owner occupied	136,281				206,031
Municipal	9,986				9,234
Total commercial	244,984				306,962
Commercial real estate:
Construction and land development	29,205				107,658
Term	60,380				124,615
Total commercial real estate	89,585				232,273
Consumer:
Home equity credit line	8,969				14,247
1-4 family residential	53,002				70,180
Construction and other consumer real estate	3,510				4,560
Bankcard and other revolving plans	1,365				1,190
Other	804				1,398
Total consumer loans	67,650				91,575
FDIC-supported loans	4,394				17,343
Total	$	406,613			$	648,153
Past due loans (accruing and nonaccruing) are summarized as follows:
	December 31, 2013
(In thousands)	Current				30-89 days				90+ days			Total			Total			Accruing			Nonaccrual
					past due				past due			past due			loans			loans			loans
																		90+ days			that are
																		past due			current1
Commercial:
Commercial and industrial	$	12,387,546			$	48,811			$	44,726		$	93,537		$	12,481,083		$	1,855		$	52,412
Leasing	387,526				173				230			403			387,929			36			563
Owner occupied	7,357,618				36,718				42,859			79,577			7,437,195			744			82,072
Municipal	440,608				3,307				5,503			8,810			449,418			—			1,176
Total commercial	20,573,298				89,009				93,318			182,327			20,755,625			2,635			136,223
Commercial real estate:
Construction and land development	2,162,018				8,967				11,836			20,803			2,182,821			23			17,311
Term	7,971,327				15,362				19,148			34,510			8,005,837			5,580			42,624
Total commercial real estate	10,133,345				24,329				30,984			55,313			10,188,658			5,603			59,935
Consumer:
Home equity credit line	2,122,549				8,001				2,570			10,571			2,133,120			98			2,868
1-4 family residential	4,704,852				8,526				23,287			31,813			4,736,665			667			27,592
Construction and other consumer real estate	322,807				1,038				1,077			2,115			324,922			—			2,232
Bankcard and other revolving plans	353,060				2,093				1,087			3,180			356,240			900			1,105
Other	196,327				827				710			1,537			197,864			54			125
Total consumer loans	7,699,595				20,485				28,731			49,216			7,748,811			1,719			33,922
FDIC-supported loans	305,709				12,026				32,536			44,562			350,271			30,391			1,975
Total	$	38,711,947			$	145,849			$	185,569		$	331,418		$	39,043,365		$	40,348		$	232,055
	December 31, 2012
(In thousands)	Current				30-89 days				90+ days			Total			Total			Accruing			Nonaccrual
					past due				past due			past due			loans			loans			loans
																		90+ days			that are
																		past due			current1
Commercial:
Commercial and industrial	$	11,124,639			$	73,555			$	58,751		$	132,306		$	11,256,945		$	4,013		$	32,389
Leasing	421,590				115				808			923			422,513			—			—
Owner occupied	7,447,083				56,504				85,495			141,999			7,589,082			1,822			100,835
Municipal	494,183				—				—			—			494,183			—			9,234
Total commercial	19,487,495				130,174				145,054			275,228			19,762,723			5,835			142,458
Commercial real estate:
Construction and land development	1,836,284				66,139				36,990			103,129			1,939,413			853			50,044
Term	7,984,819				24,730				53,270			78,000			8,062,819			107			54,546
Total commercial real estate	9,821,103				90,869				90,260			181,129			10,002,232			960			104,590
Consumer:
Home equity credit line	2,169,722				4,036				3,922			7,958			2,177,680			—			8,846
1-4 family residential	4,282,611				24,060				43,658			67,718			4,350,329			1,423			21,945
Construction and other consumer real estate	314,931				4,344				1,960			6,304			321,235			395			2,500
Bankcard and other revolving plans	302,587				2,439				1,402			3,841			306,428			1,010			721
Other	213,930				1,411				1,038			2,449			216,379			107			275
Total consumer loans	7,283,781				36,290				51,980			88,270			7,372,051			2,935			34,287
FDIC-supported loans	454,333				12,407				61,501			73,908			528,241			52,033			7,393
Total	$	37,046,712			$	269,740			$	348,795		$	618,535		$	37,665,247		$	61,763		$	288,728
1 Represents nonaccrual loans not past due more than 30 days; however, full payment of principal and interest is still not expected.
Credit Quality Indicators
In addition to the past due and nonaccrual criteria, we also analyze loans using a loan grading system. We generally assign internal grades to loans with commitments less than $750,000 based on the performance of those loans. Performance-based grades follow our definitions of Pass, Special Mention, Substandard, and Doubtful, which are consistent with published definitions of regulatory risk classifications.
Definitions of Pass, Special Mention, Substandard, and Doubtful are summarized as follows:
Pass – A Pass asset is higher quality and does not fit any of the other categories described below. The likelihood of loss is considered remote.
Special Mention – A Special Mention asset has potential weaknesses that deserve management’s close attention. If left uncorrected, these potential weaknesses may result in deterioration of the repayment prospects for the asset or in the bank’s credit position at some future date.
Substandard – A Substandard asset is inadequately protected by the current sound worth and paying capacity of the obligor or of the collateral pledged, if any. Assets so classified have well defined weaknesses and are characterized by the distinct possibility that the bank may sustain some loss if deficiencies are not corrected.
Doubtful – A Doubtful asset has all the weaknesses inherent in a Substandard asset with the added characteristics that the weaknesses make collection or liquidation in full highly questionable.
We generally assign internal risk grades to commercial and CRE loans with commitments equal to or greater than $750,000 based on financial and statistical models, individual credit analysis, and loan officer judgment. For these larger loans, we assign multiple grades within the Pass classification or one of the following four grades: Special Mention, Substandard, Doubtful, and Loss. Loss indicates that the outstanding balance has been charged off. We confirm our internal risk grades quarterly, or as soon as we identify information that affects the credit risk of the loan.
For consumer and small commercial loans, we generally assign internal risk grades similar to those described previously based on automated rules that depend on refreshed credit scores, payment performance, and other risk indicators. These are generally assigned either a Pass, Special Mention, or Substandard grade and are reviewed as we identify information that might warrant a downgrade. During the third quarter of 2013, we refined our risk grading methodology for certain smaller balance loans.
Outstanding loan balances (accruing and nonaccruing) categorized by these credit quality indicators are summarized as follows:
	December 31, 2013
(In thousands)	Pass				Special				Sub-			Doubtful			Total			Total
					Mention				standard						loans			allowance
Commercial:
Commercial and industrial	$	11,807,825			$	303,598			$	360,391		$	9,269		$	12,481,083
Leasing	380,268				2,050				5,611			—			387,929
Owner occupied	6,827,464				184,328				425,403			—			7,437,195
Municipal	439,432				—				9,986			—			449,418
Total commercial	19,454,989				489,976				801,391			9,269			20,755,625			$	465,145
Commercial real estate:
Construction and land development	2,107,828				15,010				59,983			—			2,182,821
Term	7,569,472				172,856				263,509			—			8,005,837
Total commercial real estate	9,677,300				187,866				323,492			—			10,188,658			213,363
Consumer:
Home equity credit line	2,111,475				—				21,645			—			2,133,120
1-4 family residential	4,668,841				—				67,824			—			4,736,665
Construction and other consumer real estate	313,881				—				11,041			—			324,922
Bankcard and other revolving plans	353,618				—				2,622			—			356,240
Other	196,770				—				1,094			—			197,864
Total consumer loans	7,644,585				—				104,226			—			7,748,811			60,865
FDIC-supported loans	232,893				22,532				94,846			—			350,271			6,918
Total	$	37,009,767			$	700,374			$	1,323,955		$	9,269		$	39,043,365		$	746,291
	December 31, 2012
(In thousands)	Pass				Special				Sub-			Doubtful			Total			Total
					Mention				standard						loans			allowance
Commercial:
Commercial and industrial	$	10,717,594			$	198,645			$	336,230		$	4,476		$	11,256,945
Leasing	419,482				226				2,805			—			422,513
Owner occupied	6,833,923				138,539				612,011			4,609			7,589,082
Municipal	453,193				31,756				9,234			—			494,183
Total commercial	18,424,192				369,166				960,280			9,085			19,762,723			$	510,908
Commercial real estate:
Construction and land development	1,648,215				57,348				233,374			476			1,939,413
Term	7,433,789				237,201				388,914			2,915			8,062,819
Total commercial real estate	9,082,004				294,549				622,288			3,391			10,002,232			276,976
Consumer:
Home equity credit line	2,138,693				85				38,897			5			2,177,680
1-4 family residential	4,234,426				4,316				111,063			524			4,350,329
Construction and other consumer real estate	313,499				218				7,518			—			321,235
Bankcard and other revolving plans	298,665				23				7,740			—			306,428
Other	209,293				3,211				3,875			—			216,379
Total consumer loans	7,194,576				7,853				169,093			529			7,372,051			95,656
FDIC-supported loans	327,609				24,980				175,652			—			528,241			12,547
Total	$	35,028,381			$	696,548			$	1,927,313		$	13,005		$	37,665,247		$	896,087
Impaired Loans
Loans are considered impaired when, based on current information and events, it is probable that we will be unable to collect all amounts due in accordance with the contractual terms of the loan agreement, including scheduled interest payments. For our non-purchased credit impaired loans, if a nonaccrual loan has a balance greater than $1 million or if a loan is a troubled debt restructuring (“TDR”), including TDRs that subsequently default, we evaluate the loan for impairment and estimate a specific reserve for the loan for all portfolio segments under applicable accounting guidance. Smaller nonaccrual loans are pooled for ALLL estimation purposes. PCI loans in our FDIC-supported portfolio segment are included in impaired loans and are accounted for under separate accounting guidance. See subsequent discussion under Purchased Loans.
When a loan is impaired, we estimate a specific reserve for the loan based on the projected present value of the loan’s future cash flows discounted at the loan’s effective interest rate, the observable market price of the loan, or the fair value of the loan’s underlying collateral less the cost to sell. The process of estimating future cash flows also incorporates the same determining factors discussed previously under nonaccrual loans. When we base the impairment amount on the fair value of the loan’s underlying collateral, we generally charge off the portion of the balance that is impaired, such that these loans do not have a specific reserve in the ALLL. Payments received on impaired loans that are accruing are recognized in interest income, according to the contractual loan agreement. Payments received on impaired loans that are on nonaccrual are not recognized in interest income, but are applied as a reduction to the principal outstanding. The amount of interest income recognized on a cash basis during the time the loans were impaired within the years ended December 31, 2013 and 2012 was not significant.
Information on all impaired loans is summarized as follows, including the average recorded investment and interest income recognized for the years ended December 31, 2013 and 2012:
	December 31, 2013																	Year Ended
																		31-Dec-13
(In thousands)	Unpaid				Recorded investment							Total			Related			Average			Interest
	principal											recorded			allowance			recorded			income
	balance				with no				with			investment						investment			recognized
					allowance				allowance
Commercial:
Commercial and industrial	$	178,281			$	30,092			$	126,692		$	156,784		$	23,687		$	185,895		$	3,572
Owner occupied	151,499				50,361				88,584			138,945			13,900			216,218			3,620
Total commercial	329,780				80,453				215,276			295,729			37,587			402,113			7,192
Commercial real estate:
Construction and land development	85,440				19,206				50,744			69,950			3,483			134,540			4,013
Term	171,826				34,258				112,330			146,588			7,981			286,389			6,686
Total commercial real estate	257,266				53,464				163,074			216,538			11,464			420,929			10,699
Consumer:
Home equity credit line	17,547				12,568				2,200			14,768			178			13,380			385
1-4 family residential	95,613				38,775				42,132			80,907			10,276			100,283			1,581
Construction and other consumer real estate	4,713				2,643				933			3,576			175			6,218			148
Bankcard and other revolving plans	726				726				—			726			—			—			—
Other	—				—				—			—			—			1,770			—
Total consumer loans	118,599				54,712				45,265			99,977			10,629			121,651			2,114
FDIC-supported loans	404,308				83,917				228,392			312,309			6,526			384,402			112,082		1
Total	$	1,109,953			$	272,546			$	652,007		$	924,553		$	66,206		$	1,329,095		$	132,087
	December 31, 2012																	Year Ended
																		31-Dec-12
(In thousands)	Unpaid				Recorded investment							Total			Related			Average			Interest
	principal											recorded			allowance			recorded			income
	balance				with no				with			investment						investment			recognized
					allowance				allowance
Commercial:
Commercial and industrial	$	176,521			$	27,035			$	119,780		$	146,815		$	12,198		$	199,238		$	3,557
Owner occupied	210,319				79,413				106,282			185,695			17,105			262,511			2,512
Total commercial	386,840				106,448				226,062			332,510			29,303			461,749			6,069
Commercial real estate:
Construction and land development	182,385				67,241				85,855			153,096			5,178			274,226			4,785
Term	310,242				70,718				187,112			257,830			16,725			410,901			7,298
Total commercial real estate	492,627				137,959				272,967			410,926			21,903			685,127			12,083
Consumer:
Home equity credit line	14,339				8,055				3,444			11,499			297			2,766			42
1-4 family residential	108,934				42,602				49,867			92,469			12,921			107,118			1,629
Construction and other consumer real estate	7,054				2,710				3,085			5,795			517			9,697			188
Bankcard and other revolving plans	287				—				287			287			1			24			—
Other	2,454				1,832				175			2,007			22			1,055			—
Total consumer loans	133,068				55,199				56,858			112,057			13,758			120,660			1,859
FDIC-supported loans	895,804				275,187				195,158			470,345			12,125			622,125			89,921		1
Total	$	1,908,339			$	574,793			$	751,045		$	1,325,838		$	77,089		$	1,889,661		$	109,932
1	The balance of interest income recognized results primarily from accretion of interest income on impaired FDIC-supported loans.
Modified and Restructured Loans
Loans may be modified in the normal course of business for competitive reasons or to strengthen the Company’s position. Loan modifications and restructurings may also occur when the borrower experiences financial difficulty and needs temporary or permanent relief from the original contractual terms of the loan. These modifications are structured on a loan-by-loan basis and, depending on the circumstances, may include extended payment terms, a modified interest rate, forgiveness of principal, or other concessions. Loans that have been modified to accommodate a borrower who is experiencing financial difficulties, and for which the Company has granted a concession that it would not otherwise consider, are considered TDRs.
We consider many factors in determining whether to agree to a loan modification involving concessions, and seek a solution that will both minimize potential loss to the Company and attempt to help the borrower. We evaluate borrowers’ current and forecasted future cash flows, their ability and willingness to make current contractual or proposed modified payments, the value of the underlying collateral (if applicable), the possibility of obtaining additional security or guarantees, and the potential costs related to a repossession or foreclosure and the subsequent sale of the collateral.
TDRs are classified as either accrual or nonaccrual loans. A loan on nonaccrual and restructured as a TDR will remain on nonaccrual status until the borrower has proven the ability to perform under the modified structure for a minimum of six months, and there is evidence that such payments can and are likely to continue as agreed. Performance prior to the restructuring, or significant events that coincide with the restructuring, are included in assessing whether the borrower can meet the new terms and may result in the loan being returned to accrual at the time of restructuring or after a shorter performance period. If the borrower’s ability to meet the revised payment schedule is uncertain, the loan remains classified as a nonaccrual loan. A TDR loan that specifies an interest rate that at the time of the restructuring is greater than or equal to the rate the bank is willing to accept for a new loan with comparable risk may not be reported as a TDR or an impaired loan in the calendar years subsequent to the restructuring if it is in compliance with its modified terms.
Selected information on TDRs at year-end that includes the recorded investment on an accruing and nonaccruing basis by loan class and modification type is summarized in the following schedules:
	December 31, 2013
	Recorded investment resulting from the following modification types:
(In thousands)	Interest				Maturity				Principal			Payment			Other1			Multiple			Total
	rate below				or term				forgiveness			deferral						modification
	market				extension													types2
Accruing
Commercial:
Commercial and industrial	$	1,143			$	9,848			$	11,491		$	3,217		$	4,308		$	53,117		$	83,124
Owner occupied	22,841				1,482				987			1,291			9,659			23,576			59,836
Total commercial	23,984				11,330				12,478			4,508			13,967			76,693			142,960
Commercial real estate:
Construction and land development	1,067				8,231				—			1,063			4,119			28,295			42,775
Term	7,542				9,241				190			3,783			14,932			61,024			96,712
Total commercial real estate	8,609				17,472				190			4,846			19,051			89,319			139,487
Consumer:
Home equity credit line	743				—				9,438			—			323			332			10,836
1-4 family residential	2,628				997				6,814			643			3,083			35,869			50,034
Construction and other consumer real estate	128				329				11			—			—			1,514			1,982
Other	—				—				—			—			—			—			—
Total consumer loans	3,499				1,326				16,263			643			3,406			37,715			62,852
Total accruing	36,092				30,128				28,931			9,997			36,424			203,727			345,299
Nonaccruing
Commercial:
Commercial and industrial	2,028				6,989				—			473			8,948			10,395			28,833
Owner occupied	3,020				1,489				1,043			1,593			10,482			14,927			32,554
Total commercial	5,048				8,478				1,043			2,066			19,430			25,322			61,387
Commercial real estate:
Construction and land development	11,699				1,555				—			—			5,303			8,617			27,174
Term	2,126				—				—			1,943			315			14,861			19,245
Total commercial real estate	13,825				1,555				—			1,943			5,618			23,478			46,419
Consumer:
Home equity credit line	—				—				1,036			—			221			—			1,257
1-4 family residential	4,315				1,396				1,606			—			3,901			14,109			25,327
Construction and other consumer real estate	4				1,260				—			—			—			229			1,493
Bankcard and other revolving plans	—				252				—			—			—			—			252
Other	—				—				—			—			—			—			—
Total consumer loans	4,319				2,908				2,642			—			4,122			14,338			28,329
Total nonaccruing	23,192				12,941				3,685			4,009			29,170			63,138			136,135
Total	$	59,284			$	43,069			$	32,616		$	14,006		$	65,594		$	266,865		$	481,434
	December 31, 2012
	Recorded investment resulting from the following modification types:
(In thousands)	Interest				Maturity				Principal			Payment			Other1			Multiple			Total
	rate below				or term				forgiveness			deferral						modification
	market				extension													types2
Accruing
Commercial:
Commercial and industrial	$	5,388			$	6,139			$	—		$	3,585		$	17,647		$	44,684		$	77,443
Owner occupied	20,963				12,104				—			4,013			9,305			13,598			59,983
Total commercial	26,351				18,243				—			7,598			26,952			58,282			137,426
Commercial real estate:
Construction and land development	1,718				9,868				2			59			8,432			30,248			50,327
Term	30,118				1,854				8,433			3,807			32,302			82,809			159,323
Total commercial real estate	31,836				11,722				8,435			3,866			40,734			113,057			209,650
Consumer:
Home equity credit line	744				—				5,965			—			300			218			7,227
1-4 family residential	2,665				1,324				5,923			147			3,319			36,199			49,577
Construction and other consumer real estate	147				—				—			—			641			2,354			3,142
Other	—				3				—			—			1			—			4
Total consumer loans	3,556				1,327				11,888			147			4,261			38,771			59,950
Total accruing	61,743				31,292				20,323			11,611			71,947			210,110			407,026
Nonaccruing
Commercial:
Commercial and industrial	318				5,667				—			480			2,035			17,379			25,879
Owner occupied	3,822				4,816				654			4,701			7,643			7,803			29,439
Total commercial	4,140				10,483				654			5,181			9,678			25,182			55,318
Commercial real estate:
Construction and land development	18,255				1,308				—			—			1,807			68,481			89,851
Term	3,042				536				—			2,645			9,389			17,718			33,330
Total commercial real estate	21,297				1,844				—			2,645			11,196			86,199			123,181
Consumer:
Home equity credit line	—				—				4,008			—			131			143			4,282
1-4 family residential	4,697				5,637				4,048			—			1,693			14,240			30,315
Construction and other consumer real estate	7				1,671				—			—			—			243			1,921
Bankcard and other revolving plans	—				287				—			—			—			—			287
Other	—				—				—			172			—			—			172
Total consumer loans	4,704				7,595				8,056			172			1,824			14,626			36,977
Total nonaccruing	30,141				19,922				8,710			7,998			22,698			126,007			215,476
Total	$	91,884			$	51,214			$	29,033		$	19,609		$	94,645		$	336,117		$	622,502
1 Includes TDRs that resulted from other modification types including, but not limited to, a legal judgment awarded on different terms, a bankruptcy plan confirmed on different terms, a settlement that includes the delivery of collateral in exchange for debt reduction, etc.
2 Includes TDRs that resulted from a combination of any of the previous modification types.
Unused commitments to extend credit on TDRs amounted to approximately $6 million at December 31, 2013 and $13 million at December 31, 2012.
The total recorded investment of all TDRs in which interest rates were modified below market was $172.6 million and $225.6 million at December 31, 2013 and 2012, respectively. These loans are included in the previous schedule in the columns for interest rate below market and multiple modification types.
The net financial impact on interest income due to interest rate modifications below market for accruing TDRs is summarized in the following schedule:
		Year Ended
		December 31,
(In thousands)		2013				2012
Commercial:
Commercial and industrial		$	(1	)		$	(287	)
Owner occupied		(4,672		)		(1,612		)
Total commercial		(4,673		)		(1,899		)
Commercial real estate:
Construction and land development		(1,342		)		(1,069		)
Term		(8,908		)		(6,664		)
Total commercial real estate		(10,250		)		(7,733		)
Consumer:
Home equity credit line		(121		)		(86		)
1-4 family residential		(14,980		)		(16,164		)
Construction and other consumer real estate		(433		)		(674		)
Total consumer loans		(15,534		)		(16,924		)
Total decrease to interest income1		$	(30,457	)		$	(26,556	)
1	Calculated based on the difference between the modified rate and the premodified rate applied to the recorded investment.
On an ongoing basis, we monitor the performance of all TDRs according to their restructured terms. Subsequent payment default is defined in terms of delinquency, when principal or interest payments are past due 90 days or more for commercial loans, or 60 days or more for consumer loans.
As of December 31, 2013, the recorded investment of accruing and nonaccruing TDRs that had a payment default during the year listed below (and are still in default at year-end) and are within 12 months or less of being modified as TDRs is as follows:
(In thousands)		31-Dec-13											31-Dec-12
		Accruing				Nonaccruing				Total			Accruing			Nonaccruing			Total
Commercial:
Commercial and industrial		$	—			$	—			$	—		$	—		$	1,816		$	1,816
Owner occupied		—				430				430			159			679			838
Total commercial		—				430				430			159			2,495			2,654
Commercial real estate:
Construction and land development		—				1,676				1,676			—			—			—
Term		—				—				—			—			—			—
Total commercial real estate		—				1,676				1,676			—			—			—
Consumer:
Home equity credit line		—				342				342			—			336			336
1-4 family residential		—				2,592				2,592			—			8,085			8,085
Total consumer loans		—				2,934				2,934			—			8,421			8,421
Total		$	—			$	5,040			$	5,040		$	159		$	10,916		$	11,075
Note: Total loans modified as TDRs during the 12 months previous to December 31, 2013 and 2012 were $155.8 million and $174.0 million, respectively.
Concentrations of Credit Risk
We perform an ongoing analysis of our loan portfolio to evaluate whether there is any significant exposure to any concentrations of credit risk. These potential concentrations include, but are not limited to, individual borrowers, groups of borrowers, industries, geographies, collateral types, sponsors, etc. Such credit risks (whether on- or off-balance sheet) may occur when groups of borrowers or counterparties have similar economic characteristics and are similarly affected by changes in economic or other conditions. Credit risk also includes the loss that would be recognized subsequent to the reporting date if counterparties failed to perform as contracted. Our analysis as of December 31, 2013 concluded that no significant exposure exists from such credit risk concentrations. See Note 8 for a discussion of counterparty risk associated with the Company’s derivative transactions.
Purchased Loans
Background and Accounting
We purchase loans in the ordinary course of business and account for them and the related interest income based on their performing status at the time of acquisition. Purchased credit-impaired (“PCI”) loans have evidence of credit deterioration at the time of acquisition and it is probable that not all contractual payments will be collected. Interest income for PCI loans is accounted for on an expected cash flow basis. Certain other loans acquired by the Company that are not credit-impaired include loans with revolving privileges and are excluded from the PCI tabular disclosures following. Interest income for these loans is accounted for on a contractual cash flow basis. Certain acquired loans with similar characteristics such as risk exposure, type, size, etc., are grouped and accounted for in loan pools.
During 2009, CB&T and NSB acquired failed banks from the FDIC as receiver and entered into loss sharing agreements with the FDIC for the acquired loans and foreclosed assets. According to the agreements, the FDIC assumes 80% of credit losses up to a threshold specified for each acquisition and 95% above that threshold for a period of five years, or in 2014. The covered portfolio primarily consists of commercial loans. The agreements expire after ten years, or in 2019, for single family residential loans. The loans acquired from the FDIC are presented separately in the Company’s balance sheet as “FDIC-supported loans” and include both PCI and certain other acquired loans. Upon acquisition, in accordance with applicable accounting guidance, the acquired loans were recorded at their fair value without a corresponding ALLL.
Outstanding Balances and Accretable Yield
The outstanding balances of all required payments and the related carrying amounts for PCI loans are as follows:
	December 31,
(In thousands)	2013				2012
Commercial	$	150,191			$	227,414
Commercial real estate	233,720				382,068
Consumer	28,608				41,398
Outstanding balance	$	412,519			$	650,880
Carrying amount	$	311,797			$	472,040
ALLL	6,478				12,077
Carrying amount, net	$	305,319			$	459,963
At the time of acquisition of PCI loans, we determine the loan’s contractually required payments in excess of all cash flows expected to be collected as an amount that should not be accreted (nonaccretable difference). With respect to the cash flows expected to be collected, the portion representing the excess of the loan’s expected cash flows over our initial investment (accretable yield) is accreted into interest income on a level yield basis over the remaining expected life of the loan or pool of loans. The effects of estimated prepayments are considered in estimating the expected cash flows.
Certain PCI loans are not accounted for as previously described because the estimation of cash flows to be collected involves a high degree of uncertainty. Under these circumstances, the accounting guidance provides that interest income is recognized on a cash basis similar to the cost recovery methodology for nonaccrual loans. The net carrying amounts in the preceding schedule also include the amounts for these loans, which were not significant at December 31, 2013 and were approximately $12.2 million at December 31, 2012.
Changes in the accretable yield for PCI loans were as follows:
(In thousands)	2013				2012
Balance at beginning of year	$	134,461			$	184,679
Accretion	(111,951		)		(89,849		)
Reclassification from nonaccretable difference	36,467				30,632
Disposals and other	18,551				8,999
Balance at end of year	$	77,528			$	134,461
Note: Amounts have been adjusted based on refinements to the original estimates of the accretable yield. Because of the estimation process required, we expect that additional adjustments to these amounts may be necessary in future periods.
The primary drivers of reclassification to accretable yield from nonaccretable difference and increases in disposals and other resulted primarily from (1) changes in estimated cash flows, (2) unexpected payments on nonaccrual loans, and (3) recoveries on zero balance loans pools. See subsequent discussion under changes in cash flow estimates.
ALLL Determination
For all acquired loans, the ALLL is only established for credit deterioration subsequent to the date of acquisition and represents our estimate of the inherent losses in excess of the book value of acquired loans. The ALLL for acquired loans is determined without giving consideration to the amounts recoverable from the FDIC through loss sharing agreements. These amounts recoverable are separately accounted for in the FDIC indemnification asset (“IA”) and are thus presented “gross” in the balance sheet. The FDIC IA is included in other assets in the balance sheet and is discussed subsequently. The ALLL is included in the overall ALLL in the balance sheet. The provision for loan losses is reported net of changes in the amounts recoverable under the loss sharing agreements.
During 2013, 2012 and 2011, we adjusted the ALLL for acquired loans by recording a negative provision for loan losses of $(10.1) million in 2013, $(16.5) million in 2012, and $(1.7) million in 2011. The provision is net of the ALLL reversals discussed subsequently. As separately discussed and in accordance with the loss sharing agreements, changes to the provision affect the net amounts recoverable from the FDIC and the balance of the FDIC IA. These adjustments, before FDIC indemnification, resulted in net recoveries of $4.8 million in 2013 and $8.6 million in 2012, and net charge offs of $7.1 million in 2011.
Changes in the provision for loan losses and related ALLL are driven in large part by the same factors that affect the changes in reclassification from nonaccretable difference to accretable yield, as discussed under changes in cash flow estimates.
Changes in Cash Flow Estimates
Over the life of the loan or loan pool, we continue to estimate cash flows expected to be collected. We evaluate quarterly at the balance sheet date whether the estimated present values of these loans using the effective interest rates have decreased below their carrying values. If so, we record a provision for loan losses.
For increases in carrying values that resulted from better-than-expected cash flows, we use such increases first to reverse any existing ALLL. During 2013, 2012, and 2011, total reversals to the ALLL, including the impact of increases in estimated cash flows, were $15.1 million in 2013 and $20.4 million in 2012. and $16.1 million in 2011. When there is no current ALLL, we increase the amount of accretable yield on a prospective basis over the remaining life of the loan and recognize this increase in interest income. Any related decrease to the FDIC IA is recorded through a charge to other noninterest expense. Changes that increase cash flows have been due primarily to (1) the enhanced economic status of borrowers compared to original evaluations, (2) improvements in the Southern California market where the majority of these loans were originated, and (3) stronger efforts by our credit officers and loan workout professionals to resolve problem loans.
The impact of increased cash flow estimates recognized in the statement of income for acquired loans with no ALLL was approximately $90.9 million in 2013, $58.5 million in 2012, and $78.4 million in 2011, of additional interest income, and $75.0 million in 2013, $46.2 million in 2012, and $56.6 million in 2011, of additional other noninterest expense due to the reduction of the FDIC IA.
FDIC Indemnification Asset
The amount of the FDIC IA was initially recorded at fair value using estimated cash flows based on credit adjustments for each loan or loan pool and the loss sharing reimbursement of 80% or 95%, as appropriate. The timing of the cash flows was adjusted to reflect our expectations to receive the FDIC reimbursements within the estimated loss period. Discount rates were based on U.S. Treasury rates or the AAA composite yield on investment grade bonds of similar maturity. As previously discussed, the amount is adjusted as actual loss experience is developed and estimated losses covered under the loss sharing agreements are updated. Estimated loan losses, if any, in excess of the amounts recoverable are reflected as period expenses through the provision for loan losses.
We account for any change in measurement of the IA due to a change in expected cash flows on the same basis as the change in the indemnified loans. Any amortization period for changes in value of the IA would be limited to the lesser of the term of the indemnification agreement or the remaining life of the indemnified loans.
Changes in the FDIC IA were as follows:
(In thousands)	2013				2012
Balance at beginning of year	$	90,929			$	133,810
Amounts filed with the FDIC and collected or in process	21,302				17,004
Net change in asset balance due to reestimation of projected cash flows 1	(85,820		)		(59,885		)
Balance at end of year	$	26,411			$	90,929
1	Negative amounts result from the accretion of loan balances based on increases in cash flow estimates on the underlying indemnified loans.
Any changes to the amortization rate of the FDIC IA are recognized immediately in the quarterly period the change in estimated cash flows is determined. All claims submitted to the FDIC have been reimbursed in a timely manner.

Derivative_Instruments_And_Hed

Derivative Instruments And Hedging Activities	12 Months Ended
	Dec. 31, 2013
Summary of Derivative Instruments [Abstract]	'
Derivative Instruments And Hedging Activities	'
	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES
	We record all derivatives on the balance sheet at fair value. Note 21 discusses the process to estimate fair value for derivatives. The accounting for changes in the fair value of derivatives depends on the intended use of the derivative and the resulting designation. Derivatives used to hedge the exposure to changes in the fair value of an asset, liability, or firm commitment attributable to a particular risk, such as interest rate risk, are considered fair value hedges. Derivatives used to hedge the exposure to variability in expected cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives used to manage the exposure to risk, which can include total return swaps, are considered credit derivatives. When put in place after purchase of the asset(s) to be protected, these derivatives generally may not be designated as accounting hedges. See discussion following regarding the total return swap and estimation of its fair value.
	For derivatives designated as fair value hedges, changes in the fair value of the derivative are recognized in earnings together with changes in the fair value of the related hedged item. The net amount, if any, representing hedge ineffectiveness, is reflected in earnings. In previous years, we used fair value hedges to manage interest rate exposure to certain long-term debt. These hedges have been terminated and their remaining balances are being amortized into earnings, as discussed subsequently.
	For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative are recorded in OCI and recognized in earnings when the hedged transaction affects earnings. The ineffective portion of changes in the fair value of cash flow hedges is recognized directly in earnings.
	No derivatives have been designated for hedges of investments in foreign operations.
	We assess the effectiveness of each hedging relationship by comparing the changes in fair value or cash flows on the derivative hedging instrument with the changes in fair value or cash flows on the designated hedged item or transaction. For derivatives not designated as accounting hedges, changes in fair value are recognized in earnings.
	Our objectives in using derivatives are to add stability to interest income or expense, to modify the duration of specific assets or liabilities as we consider advisable, to manage exposure to interest rate movements or other identified risks, and/or to directly offset derivatives sold to our customers. To accomplish these objectives, we use interest rate swaps as part of our cash flow hedging strategy. These derivatives are used to hedge the variable cash flows associated with designated commercial loans.
	Exposure to credit risk arises from the possibility of nonperformance by counterparties. These counterparties primarily consist of financial institutions that are well established and well capitalized. We control this credit risk through credit approvals, limits, pledges of collateral, and monitoring procedures. No losses on derivative instruments have occurred as a result of counterparty nonperformance. Nevertheless, the related credit risk is considered and measured when and where appropriate.
	Our derivative contracts require us to pledge collateral for derivatives that are in a net liability position by greater than specified amounts. Certain of these derivative contracts contain credit-risk-related contingent features that include the requirement to maintain a minimum debt credit rating. We may be required to pledge additional collateral if a credit-risk-related feature were triggered, such as a downgrade of our credit rating. However, in past situations, not all counterparties have demanded that additional collateral be pledged when provided for under their contracts. At December 31, 2013, the fair value of our derivative liabilities was $68.4 million, for which we were required to pledge cash collateral of approximately $34.9 million in the normal course of business. If our credit rating were downgraded one notch by either Standard & Poor’s or Moody’s at December 31, 2013, the additional amount of collateral we could be required to pledge is $1.5 million. Since June 2013, as required by the Dodd-Frank Act, all new eligible derivatives entered into are cleared through a central clearinghouse. Derivatives that are centrally cleared do not have credit-risk-related features that require additional collateral if our credit rating is downgraded.
	Interest rate swap agreements designated as cash flow hedges involve the receipt of fixed-rate amounts in exchange for variable-rate payments over the life of the agreements without exchange of the underlying principal amount. Derivatives not designated as accounting hedges, including basis swap agreements, are not speculative and are used to economically manage our exposure to interest rate movements and other identified risks, but do not meet the strict hedge accounting requirements.
	Selected information with respect to notional amounts and recorded gross fair values at December 31, 2013 and 2012, and the related gain (loss) of derivative instruments for the years then ended is summarized as follows:
		December 31, 2013									December 31, 2012
		Notional			Fair value						Notional		Fair value
	(In thousands)	amount			Other			Other			amount		Other		Other
					assets			liabilities					assets		liabilities
	Derivatives designated as hedging instruments
	Cash flow hedges 1:
	Interest rate swaps	$	100,000		$	202		$	583		$	150,000	$	1,188	$	—
	Total derivatives designated as hedging instruments	100,000			202			583			150,000		1,188		—
	Derivatives not designated as hedging instruments
	Interest rate swaps	65,850			420			421			98,524		1,043		1,047
	Interest rate swaps for customers 2	2,902,776			55,447			54,688			2,607,603		79,579		82,926
	Foreign exchange	751,066			9,614			8,643			520,696		4,404		3,159
	Total return swap	1,159,686			—			4,062			1,159,686		—		5,127
	Total derivatives not designated as hedging instruments	4,879,378			65,481			67,814			4,386,509		85,026		92,259
	Total derivatives	$	4,979,378		$	65,683		$	68,397		$	4,536,509	$	86,214	$	92,259
		Year Ended December 31, 2013											Year Ended December 31, 2012
		Amount of derivative gain (loss) recognized/reclassified
	(In thousands)	OCI			Reclassified			Noninterest			Offset to		OCI		Reclassified			Noninterest			Offset to
					from AOCI			income			interest				from AOCI			income			interest
					to interest			(expense)			expense				to interest			(expense)			expense
					income										income
	Derivatives designated as hedging instruments
	Asset derivatives
	Cash flow hedges 1:
	Interest rate swaps	$	(225	)	$	2,647							$	390	$	13,062
		(225		)	2,647		3						390		13,062		3
	Liability derivatives
	Fair value hedges:
	Terminated swaps on long-term debt										$	3,120									$	3,054
	Total derivatives designated as hedging instruments	(225		)	2,647						3,120		390		13,062						3,054
	Derivatives not designated as hedging instruments
	Interest rate swaps							$	(493	)								$	(1,467	)
	Interest rate swaps for customers 2							10,918										7,858
	Basis swaps							—										18
	Futures contracts							2										(13		)
	Foreign exchange							9,190										8,628
	Total return swap							(21,753		)								(21,707		)
	Total derivatives not designated as hedging instruments							(2,136		)								(6,683		)
	Total derivatives	$	(225	)	$	2,647		$	(2,136	)	$	3,120	$	390	$	13,062		$	(6,683	)	$	3,054
	Note: These schedules are not intended to present at any given time the Company’s long/short position with respect to its derivative contracts.
	1 Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the derivative gain (loss).
	2 Amounts include both the customer swaps and the offsetting derivative contracts.
	3 Amounts of $2.6 million for 2013 and $13.1 million for 2012 are the amounts of reclassification to earnings presented in the tabular changes of AOCI in Note 14.
	At December 31, the fair values of derivative assets and liabilities were reduced (increased) by net credit valuation adjustments of $1.6 million and $(2.4) million in 2013, and $3.1 million and $(0.2) million in 2012, respectively. These adjustments are required to reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk.
	Under master netting arrangements, we offset fair value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a payable) against recognized fair value amounts of derivatives executed with the same counterparty. At both December 31, 2013 and 2012, no cash collateral was used for such offsets.
	We offer interest rate swaps to our customers to assist them in managing their exposure to changing interest rates. Upon issuance, all of these customer swaps are immediately “hedged” by offsetting derivative contracts, such that the Company minimizes its net risk exposure resulting from such transactions. Fee income from customer swaps is included in other service charges, commissions and fees. As with other derivative instruments, we have credit risk for any nonperformance by counterparties.
	Options contracts were used to economically hedge certain interest rate exposures of previously used Eurodollar futures contracts. During 2012, all of the remaining options contracts expired after we terminated during 2011 all of the Eurodollar and federal funds futures contracts, or a net amount of approximately $9.5 billion.
	The remaining balances of any derivative instruments terminated prior to maturity, including amounts in AOCI for swap hedges, are accreted or amortized to interest income or expense over the period to their previously stated maturity dates.
	Amounts in AOCI are reclassified to interest income as interest is earned on variable rate loans and as amounts for terminated hedges are accreted or amortized to earnings. For the 12 months following December 31, 2013, we estimate that an additional $1.3 million will be reclassified.
	Total Return Swap
	On July 28, 2010, we entered into a total return swap (“TRS”) and related interest rate swaps with Deutsche Bank AG (“DB”) relating to a portfolio of $1.16 billion notional amount of our bank and insurance trust preferred CDOs. As a result of the TRS, DB assumed all of the credit risk of this CDO portfolio, providing timely payment of all scheduled payments of interest and principal when contractually due to the Company (without regard to acceleration or deferral events). The transaction reduced regulatory risk-weighted assets and improved the Company’s risk-based capital ratios.
	The transaction did not qualify for hedge accounting and did not change the accounting for the underlying securities, including the quarterly analysis of OTTI and OCI. As a result, future potential OTTI, if any, associated with the underlying securities may not be offset by any valuation adjustment on the swap in the quarter in which OTTI is recognized, and OTTI changes could result in reductions in our regulatory capital ratios, which could be material.
The fair value of the TRS derivative liability was $4.1 million and $5.1 million at December 31, 2013 and 2012, respectively.
Both the fair values of the securities and the fair value of the TRS are dependent upon the projected credit-adjusted cash flows of the securities. The Company is able to cancel the transaction once each calendar quarter; if the TRS were canceled, no further costs would be incurred beyond the quarter of cancellation. Accordingly, absent major changes in these projected cash flows, we expect the value of the TRS liability to continue to approximate its December 31, 2013 fair value. We expect to incur subsequent net quarterly costs of approximately $5.4 million under the TRS, including related interest rate swaps and scheduled payments of interest on the underlying CDOs, as long as the TRS remains in place for this CDO portfolio. Our estimated quarterly expense amount would be impacted by, among other things, changes in the composition of the CDO portfolio included in the transaction and changes over time in the forward London Interbank Offered Rate (“LIBOR”) rate curve. The Company’s costs are also subject to adjustment in the event of future changes in regulatory requirements applicable to DB if we do not then elect to terminate the transaction. Termination by the Company for such regulatory changes applicable to DB will result in no payment by the Company.
At December 31, 2013, we completed a valuation process which resulted in an estimated fair value for the TRS under Level 3. The process utilized valuation inputs from two sources:
1)	The Company built on its fair valuation process for the underlying CDO portfolio and utilized those same projected cash flows to quantify the extent and timing of payments to be received from the Trustee related to each CDO and in the aggregate. For valuation purposes, we assumed that a market participant would cancel the TRS at the first opportunity if the TRS did not have a positive value based on the best estimates of cash flows through maturity. Consequently, the fair value approximated the amount of required payments up to the earliest termination date.
2)	A valuation from a market participant in possession of all relevant terms and costs of the TRS structure.
We considered the observable input or inputs from the market participant, who is the counterparty to this transaction, as well as the results of our internal modeling in estimating the fair value of the TRS. We expect to continue the use of this methodology in subsequent periods.

Premises_and_Equipment

Premises and Equipment	12 Months Ended
	Dec. 31, 2013
Property, Plant and Equipment [Line Items]	'
Property, Plant and Equipment Disclosure [Text Block]	'
	.	PREMISES AND EQUIPMENT
	Premises and equipment are summarized as follows:
	(In thousands)	December 31,
		2013		2012
	Land	$	185,119	$	184,762
	Buildings	509,151		497,449
	Furniture, equipment and software	664,556		622,170
	Leasehold improvements	129,056		121,953
	Total	1,487,882		1,426,334
	Less accumulated depreciation and amortization	761,510		717,452
	Net book value	$	726,372	$	708,882

Goodwill_And_Other_Intangible_

Goodwill And Other Intangible Assets	12 Months Ended
	Dec. 31, 2013
Goodwill [Abstract]	'
Goodwill and Intangible Assets Disclosure [Text Block]	'
	.	GOODWILL AND OTHER INTANGIBLE ASSETS
	Core deposit and other intangible assets and related accumulated amortization are as follows at December 31:
			Gross carrying amount				Accumulated amortization						Net carrying amount
	(In thousands)		2013		2012		2013			2012			2013			2012
	Core deposit intangibles		$	180,290	$	180,290	$	(146,557	)	$	(133,628	)	$	33,733		$	46,662
	Customer relationships and other intangibles		29,064		29,064		(26,353		)	(24,908		)	2,711			4,156
			$	209,354	$	209,354	$	(172,910	)	$	(158,536	)	$	36,444		$	50,818
	The amount of amortization expense of core deposit and other intangible assets is separately reflected in the statement of income.
	Estimated amortization expense for core deposit and other intangible assets is as follows for the five years succeeding December 31, 2013:
	(In thousands)
	2014		$	10,924
	2015		9,247
	2016		7,888
	2017		6,370
	2018		1,556
	Changes in the carrying amount of goodwill for operating segments with goodwill are as follows:
	(In thousands)		Zions Bank		CB&T		Amegy			Other			Consolidated Company
	Balance at December 31, 2011		$	19,514	$	379,024	$	615,591		$	1,000		$	1,015,129
	Impairment losses		—		—		—			(1,000		)	(1,000		)
	Balance at December 31, 2012		19,514		379,024		615,591			—			1,014,129
	Impairment losses		—		—		—			—			—
	Balance at December 31, 2013		$	19,514	$	379,024	$	615,591		$	—		$	1,014,129
	A Company-wide annual impairment test is conducted as of October 1 of each year and updated on a more frequent basis when events or circumstances indicate that impairment could have taken place. Results of the testing for 2013 concluded that no impairment was present in any of the operating segments. For 2012, no impairment was present, except for TCBO included in the Other segment. A comparison of fair value to carrying value determined that the entire remaining $1 million of TCBO’s goodwill should be impaired.

Deposits

Deposits	12 Months Ended
	Dec. 31, 2013
Deposits [Abstract]	'
Deposit Liabilities Disclosures [Text Block]	'
	11	DEPOSITS
	At December 31, 2013, the scheduled maturities of all time deposits were as follows:
	(In thousands)
	2014		$	2,216,605
	2015		265,984
	2016		161,620
	2017		86,903
	2018		113,534
	Thereafter		663
			$	2,845,309
	At December 31, 2013, the contractual maturities of domestic time deposits with a denomination of $100,000 and over were as follows: $351 million in 3 months or less, $301 million over 3 months through 6 months, $374 million over 6 months through 12 months, and $304 million over 12 months.
	Domestic time deposits under $100,000 were $1.3 billion and $1.5 billion at December 31, 2013 and 2012, respectively. Domestic time deposits $100,000 and over were $1.3 billion and $1.5 billion at December 31, 2013 and 2012, respectively. Foreign time deposits $100,000 and over were $252 million and $213 million at December 31, 2013 and 2012, respectively.
	Deposit overdrafts reclassified as loan balances were $39 million and $78 million at December 31, 2013 and 2012, respectively.

ShortTerm_Borrowings

Short-Term Borrowings	12 Months Ended
	Dec. 31, 2013
Short-term Debt [Abstract]	'
Short-Term Borrowings	'
	12	SHORT-TERM BORROWINGS
	Selected information for federal funds purchased and security repurchase agreements is as follows:
	(Amounts in thousands)		2013			2012			2011
	Federal funds purchased:
	Average amount outstanding		$	150,217		$	280,859		$	312,730
	Weighted average rate		0.15		%	0.19		%	0.2		%
	Highest month-end balance		$	206,450		$	560,674		$	361,217
	Year-end balance		129,131			175,468			214,224
	Weighted average rate on outstandings at year-end		0.14		%	0.13		%	0.2		%
	Security repurchase agreements:
	Average amount outstanding		$	124,929		$	190,365		$	340,015
	Weighted average rate		0.05		%	0.04		%	0.05		%
	Highest month-end balance		$	137,611		$	264,187		$	393,874
	Year-end balance		137,611			145,010			393,874
	Weighted average rate on outstandings at year-end		0.05		%	0.04		%	0.06		%
	Federal funds purchased and security repurchase agreements at year-end		$	266,742		$	320,478		$	608,098
	These short-term borrowings generally mature in less than 30 days. Our participation in security repurchase agreements is on an overnight or term basis (e.g., 30 or 60 days). Certain overnight repurchase agreements are performed with sweep accounts in conjunction with a master repurchase agreement. In this case, securities under our control are pledged for and interest is paid on the collected balance of the customers’ accounts. For term repurchase agreements, securities are transferred to the applicable counterparty. The counterparty, in certain instances, is contractually entitled to sell or repledge securities accepted as collateral. At December 31, 2013, all security repurchase agreements were overnight.
	Other short-term borrowings are summarized as follows:
			December 31,
	(In thousands)		2013			2012
	Senior medium-term notes		$	—		$	4,951
	Commercial paper		—			—
	Other		—			458
			$	—		$	5,409
	Our subsidiary banks may borrow from the FHLB under their lines of credit that are secured under blanket pledge arrangements. The subsidiary banks maintain unencumbered collateral with carrying amounts adjusted for the types of collateral pledged, equal to at least 100% of the outstanding advances. At December 31, 2013, the amount available for FHLB advances was approximately $11.0 billion. At December 31, 2013, no short-term FHLB advances were outstanding.
	Our subsidiary banks also borrow from the Federal Reserve through the Term Auction Facility. Amounts that can be borrowed are based on the amount of collateral pledged to a Federal Reserve Bank. At December 31, 2013, the amount available for additional Federal Reserve borrowings was approximately $5.3 billion.

LongTerm_Debt

Long-Term Debt	12 Months Ended
	Dec. 31, 2013
Long-term Debt, Unclassified [Abstract]	'
Debt Disclosure [Text Block]	'
	13	LONG-TERM DEBT
	Long-term debt is summarized as follows:
			December 31,
	(In thousands)		2013			2012
	Junior subordinated debentures related to trust preferred securities		$	168,043		$	461,858
	Convertible subordinated notes		184,147			308,468
	Subordinated notes		443,231			217,175
	Senior notes		1,454,779			1,325,630
	FHLB advances		22,736			23,300
	Capital lease obligations and other		639			682
			$	2,273,575		$	2,337,113
	The preceding amounts represent the par value of the debt adjusted for any unamortized premium or discount or other basis adjustments, including the value of associated hedges.
	Trust Preferred Securities
	Junior subordinated debentures related to trust preferred securities were issued to the following trusts at December 31, 2013:
	(Amounts in thousands)		Balance			Coupon rate 1		Maturity
	Amegy Statutory Trust I		$	51,547		3mL+2.85% (3.09%)		Dec-33
	Amegy Statutory Trust II		36,083			3mL+1.90% (2.14%)		Oct-34
	Amegy Statutory Trust III		61,856			3mL+1.78% (2.02%)		Dec-34
	Stockmen’s Statutory Trust II		7,732			3mL+3.15% (3.40%)		Mar-33
	Stockmen’s Statutory Trust III		7,732			3mL+2.89% (3.13%)		Mar-34
	Intercontinental Statutory Trust I		3,093			3mL+2.85% (3.09%)		Mar-34
			$	168,043
	1	Designation of “3mL” is three-month LIBOR; effective interest rate at the beginning of the accrual period commencing on or before December 31, 2013 is shown in parenthesis.
	The junior subordinated debentures are issued or have been assumed by the Parent or Amegy. Each trust has issued a corresponding series of trust preferred security obligations. The trust obligations are in the form of capital securities subject to mandatory redemption upon repayment of the junior subordinated debentures by the Parent or Amegy, as the case may be. The sole assets of the trusts are the junior subordinated debentures.
	Interest distributions are made quarterly at the same rates earned by the trusts on the junior subordinated debentures; however, we may defer the payment of interest on the junior subordinated debentures. Early redemption is currently possible on all of the debentures and requires the approval of banking regulators.
	The debentures for the Amegy and Intercontinental trusts are direct and unsecured obligations of Amegy and are subordinate to other indebtedness and general creditors. The debentures for the Stockmen’s trusts are unsecured obligations of Stockmen’s assumed by the Parent in connection with the acquisition of Stockmen’s by NBAZ. Amegy has unconditionally guaranteed the obligations of the Amegy and Intercontinental trusts with respect to their respective series of trust preferred securities to the extent set forth in the applicable guarantee agreements. The Parent has assumed Stockmen’s unconditional guarantees of the obligations of the Stockmen’s trusts with respect to their respective series of trust preferred securities to the extent set forth in the applicable guarantee agreements. See discussion under Debt Redemptions following.
	Subordinated Notes
	Subordinated notes consist of the following at December 31, 2013:
	(Amounts in thousands)		Convertible						Subordinated notes
			subordinated notes
	Coupon rate		Balance			Par amount			Balance			Par amount			Maturity
	5.65%		$	70,218		$	75,704		$	30,494		$	30,173		May-14
	6.00%		60,107			79,292			33,697			32,366			Sep-15
	5.50%		53,822			71,595			54,149			52,078			Nov-15
	5.65%								162,000			162,000			Nov-23
	6.95%								87,891			87,891			Sep-28
	3mL+1.25% (1.50%)	1							75,000			75,000		2	Sep-14
			$	184,147		$	226,591		$	443,231		$	439,508
	1	Designation of “3mL” is three-month LIBOR; effective interest rate at the beginning of the accrual period commencing on or before December 31, 2013 is shown in parenthesis.
	2	Issued by Amegy.
	These notes are unsecured and are not redeemable prior to maturity, except those noted subsequently. Also, see discussion under Debt Redemptions following. Interest is payable semiannually on all these notes except for the 6.95% notes whose quarterly interest payments commence December 15, 2013 to the earliest possible redemption date of September 15, 2023, after which the interest rate changes to an annual floating rate equal to 3mL+3.89%. Interest payments on the $162 million notes commence May 15, 2014 to the earliest possible redemption date of November 15, 2018, after which they are payable quarterly at an annual floating rate equal to 3mL+4.19%.
	Convertible Subordinated Notes
	The convertible subordinated notes resulted from the modification in 2009 of $1.2 billion par value of subordinated notes. The convertible subordinated notes permit conversion on a par-for-par basis into either the Company’s Series A or Series C preferred stock. The carrying value of the subordinated notes at the time of modification included associated terminated fair value hedges. Holders of the convertible subordinated notes are allowed to convert on the interest payment dates of the debt. As discussed in Note 14, we recorded the intrinsic value of the beneficial conversion feature (“BCF”) directly in common stock in connection with the modification of the subordinated notes. Note 14 also discusses the redemption in September 2013 of all of the $800 million par amount of Series C preferred stock. No conversions of convertible subordinated notes have occurred since this redemption. Subordinated notes converted to preferred stock prior to this redemption amounted to $1.2 million in 2013, $89.6 million in 2012, and $256.1 million in 2011.
	The convertible debt discount recorded in connection with the subordinated debt modification is amortized to interest expense using the interest method over the remaining terms of the convertible subordinated notes. When holders of the convertible subordinated notes exercise their rights to convert to preferred stock, the rate of amortization is accelerated by immediately expensing any unamortized discount associated with the converted debt. Amortization of the convertible debt discount is summarized as follows:
	(In thousands)		2013			2012			2011
	Balance at beginning of year		$	149,333		$	224,206		$	385,831
	Discount amortization on convertible subordinated debt		(48,378		)	(43,341		)	(46,021		)
	Accelerated discount amortization on convertible subordinated debt		(368		)	(31,532		)	(115,604		)
	Accelerated discount amortization resulting from tender offer for debt repurchases (subsequently discussed)		(58,143		)	—			—
	Total amortization		(106,889		)	(74,873		)	(161,625		)
	Balance at end of year		$	42,444		$	149,333		$	224,206
	As discussed in Note 7, we terminated all fair value hedges that had been used for the subordinated notes. The remaining value of $3.8 million and $7.8 million at December 31, 2013 and 2012, respectively, is amortized as a reduction of interest expense over the periods to the previously stated maturity dates of the notes. See Debt Redemptions regarding the tender offer for debt repurchases.
	Senior Notes
	Senior notes consist of the following at December 31, 2013:
	(Amounts in thousands)
	Coupon rate		Balance			Par amount			Maturity
	7.75%		$	235,382		$	240,769		Sep-14
	4.00%		196,103			198,448			Jun-16
	4.50%		388,467			400,000			Mar-17
	4.50%		299,199			300,000			Jun-23
	2.55% - 5.50%		335,628			335,881			Feb 2014 - Nov 2019
			$	1,454,779
	These notes are unsecured and interest is payable semiannually. The notes were issued under a shelf registration filed with the SEC and were sold via the Company’s online auction process and direct sales. The notes are not redeemable prior to maturity except for the $335.6 million notes, of which $267.6 million have optional early redemptions as follows: $135.3 million as of December 31, 2013, $93.9 million in 2014, $27.3 million in 2015, and $11.1 million in 2016.
Debt Redemptions and Repurchases
Effective December 6, 2013, we completed the purchases of $250 million par amount of our 5.5% and 6.0% convertible and nonconvertible subordinated notes. The purchases were made as a result of separate cash tender offers totaling $250 million that were announced on November 6, 2013.
Following our tender offer announced May 31, 2013, we repurchased on June 18, 2013 approximately $258 million of our $500 million outstanding 7.75% senior notes due September 23, 2014.
On May 3, 2013, Zions Capital Trust B redeemed all of its 8.0% trust preferred securities, or 11.4 million shares, at 100% of their $25 per share liquidation amount for a total of $285 million.
Total debt extinguishment costs for all of the redemptions previously discussed were $120.2 million, which consisted of $45.8 million of early tender premiums and $74.4 million in write-offs of unamortized debt discount and issuance costs.
On the maturity date of June 21, 2012, we redeemed all $254.9 million of variable rate senior medium-term notes that were guaranteed under the FDIC’s Temporary Liquidity Guarantee Program. We have no other notes outstanding under this program.
Federal Home Loan Bank Advances
The FHLB advances were issued to Amegy with maturities from June 2014 to September 2041 at interest rates from 2.81% to 6.98%. The weighted average interest rate on advances outstanding was 4.5% at both December 31, 2013 and 2012.
Maturities of Long-term Debt
Maturities of long-term debt are as follows for the years succeeding December 31, 2013:
(In thousands)		Consolidated			Parent only
2014		$	460,825		$	385,771
2015		279,538			279,482
2016		318,057			318,004
2017		405,923			405,865
2018		38,346			38,285
Thereafter		767,073			591,400
		$	2,269,762		$	2,018,807
These maturities do not include the associated hedges. The $591.4 million of Parent only maturities payable after 2018 consist of $15.5 million of junior subordinated debentures payable to Stockmen’s Trust II and III and $575.9 million of senior notes.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]	'
Shareholders' Equity	'
	14	SHAREHOLDERS’ EQUITY
	Preferred Stock
	Preferred stock is without par value and has a liquidation preference of $1,000 per share, or $25 per depositary share. Except for Series I and J, all preferred shares were issued in the form of depositary shares, with each depositary share representing a 1/40th ownership interest in a share of the preferred stock. All preferred shares are registered with the SEC.
	In general, preferred shareholders may receive asset distributions before common shareholders; however, preferred shareholders have only limited voting rights generally with respect to certain provisions of the preferred stock, the issuance of senior preferred stock, and the election of directors. Preferred stock dividends reduce earnings available to common shareholders and are paid on the 15th day of the months indicated in the following schedule. Dividends are approved by the Board of Directors and are subject to regulatory approval. Redemption of the preferred stock is at the Company’s option after the expiration of any applicable redemption restrictions. The redemption amount is computed at the per share liquidation preference plus any declared but unpaid dividends. Redemptions are subject to certain regulatory provisions.
	Preferred stock is summarized as follows:
	(Amounts in		Carrying value at								Shares at							Dividends payable		Earliest	Rate following earliest redemption date	Dividends payable after rate change
	thousands)		December 31,								31-Dec-13									redemption date
			2013				2012				Authorized			Outstanding			Rate
																					(when applicable)
	Series A		$	66,127			$	60,220			140,000			66,000			> of 4.0% or 3mL+0.52%	Qtrly Mar,Jun,Sep,Dec		15-Dec-11
	Series C		—				924,332
	Series F		143,750				143,750				250,000			143,750			7.90%	Qtrly Mar,Jun,Sep,Dec		15-Jun-17
	Series G		171,827				—				200,000			171,827			6.30%	Qtrly Mar,Jun,Sep,Dec		15-Mar-23	annual float-ing rate =mL+4.24%
	Series H		126,221				—				126,221			126,221			5.75%	Qtrly Mar,Jun,Sep,Dec		15-Jun-19
	Series I		300,893				—				300,893			300,893			5.80%	Semi-annually Jun,Dec		15-Jun-23	annual float-ing rate =mL+3.8%	Qtrly Mar,Jun,Sep,Dec
	Series J		195,152				—				195,152			195,152			7.20%	Semi-annually Mar,Sep		15-Sep-23	annual float-ing rate =mL+4.44%	Qtrly Mar,Jun,Sep,Dec
			$	1,003,970			$	1,128,302
	Series C Preferred Stock Redemption
	On September 15, 2013, we redeemed all of the outstanding $800 million par amount (799,467 shares) of our 9.5% Series C preferred stock at 100% of the $25 per depositary share redemption amount. As shown in the previous schedule, the summation of December 31, 2013 carrying values for Series G, H, I and J, plus the change in carrying value for Series A between December 31, 2013 and 2012 (reflecting the reopening of Series A preferred shares in 2013), equal the $800 million used to fund this redemption. The Federal Reserve did not object to the element of our Capital Plan to redeem the entire $800 million of our Series C preferred stock subject to issuing an equivalent amount of new preferred shares.
	The redemption reduced preferred stock by the $926 million carrying value (at the time of redemption) of the Series C preferred stock. The difference from the par amount, or $126 million, related to the intrinsic value of the beneficial conversion feature (“BCF”) associated with the convertible subordinated debt. The BCF represented the difference on the original commitment date of the fair values of the convertible subordinated debt and the preferred stock into which the debt was convertible. The total BCF of $203 million was included in common stock when the subordinated debt was modified to convertible subordinated debt in June 2009. The Company has “no par” common stock and all additional paid-in capital transactions such as this are recorded in common stock.
	Portions of the BCF have been transferred since July 2009 from common stock to preferred stock as holders of convertible subordinated debt exercised rights to convert to the Series C preferred stock. Prior to the redemption, these BCF transfers amounted to $0.2 million in 2013, $15.2 million in 2012, and $43.1 million in 2011. Amounts transferred became part of the carrying value of the preferred stock. The $126 million BCF transfer was recorded as a preferred stock redemption in the 2013 statement of income. At December 31, 2013, the remaining balance in common stock of the BCF was approximately $76.4 million. Although the legal right to convert continues to exist, if no further conversions occur or the convertible debt matures, the current amount of the BCF will remain in common stock.
	Other Preferred Stock Redemptions
	The Series D preferred stock was redeemed in two equal installments by September 26, 2012. The total of $1.4 billion had been issued by the U.S. Department of the Treasury under the Troubled Asset Relief Program (“TARP”) Capital Purchase Program (“CPP”). The associated warrants to purchase 5.8 million shares of common stock were auctioned by the U.S. Treasury in December 2012. The Company did not receive any proceeds from the warrant auction. The warrants have an exercise price of $36.27 per share and expire November 14, 2018. The TARP redemption accelerated the amortization to preferred stock dividends in 2012 of the entire remaining unamortized discount. Amortization amounted to $44.7 million in 2012 and $21.6 million in 2011.
	The entire Series E preferred stock of $142.5 million was redeemed on its call date of June 15, 2012. Commissions and fees of $3.8 million previously recorded in common stock were charged to retained earnings. Proceeds from the Series F preferred stock were used to redeem the Series E preferred stock.
	Common Stock
	In 2011, we issued $25.5 million of new common stock under a common equity distribution agreement. The issuance consisted of approximately 1.1 million shares at an average price of $23.89 per share. Net of commissions and fees, this issuances added $25.0 million to common stock.
	In addition to the TARP warrants previously discussed, we have issued a total of 29.3 million common stock warrants that can each be exercised for a share of common stock at an initial price of $36.63 through May 22, 2020.
	Accumulated Other Comprehensive Income
	Effective January 1, 2013, we adopted ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This new guidance under ASU 220, Comprehensive Income, follows ASUs 2011-12 and 2011-05 and finalizes the reporting requirements for reclassifications out of AOCI. Companies must present reclassifications by component when reporting changes in AOCI. Items reclassified in their entirety out of AOCI to net income must have the effect of the reclassification disclosed according to the respective income statement line item. Items not reclassified in their entirety must be cross-referenced to other disclosures in the footnotes. The entire reclassification information must be disclosed in one location, either on the face of the financial statements by income statement line item, or in a footnote. We have elected to present the information in a footnote and include the comparison to the previous year.
	Changes in AOCI by component are as follows:
	(In thousands)		Net unrealized gains (losses) on investment securities						Net unrealized gains (losses) on derivative instruments						Pension and post-retirement			Total
	2013:00:00
	Balance at December 31, 2012			$	(397,616	)				$	1,794				$	(50,335	)	$	(446,157	)
	Other comprehensive income (loss) before reclassifications, net of tax			127,648						(431		)			20,577			147,794
	Amounts reclassified from AOCI, net of tax			102,936						(1,580		)			4,906			106,262
	Other comprehensive income (loss)			230,584						(2,011		)			25,483			254,056
	Balance at December 31, 2013			$	(167,032	)				$	(217	)			$	(24,852	)	$	(192,101	)
	Income tax expense (benefit) included in other comprehensive income (loss)			$	144,343					$	(861	)			$	16,625		$	160,107
	2012:00:00
	Balance at December 31, 2011			$	(546,763	)				$	9,404				$	(54,725	)	$	(592,084	)
	Other comprehensive income (loss) before reclassifications, net of tax			90,924						232					(976		)	90,180
	Amounts reclassified from AOCI, net of tax			58,223						(7,842		)			5,366			55,747
	Other comprehensive income (loss)			149,147						(7,610		)			4,390			145,927
	Balance at December 31, 2012			$	(397,616	)				$	1,794				$	(50,335	)	$	(446,157	)
	Income tax expense (benefit) included in other comprehensive income (loss)			$	93,213					$	(5,063	)			$	2,870		$	91,020
															Statement of income (SI) Balance sheet
	(In thousands)		Amounts reclassified from AOCI 1												(BS)
	Details about AOCI components		2013				2012				2011						Affected line item
	Net realized gains (losses) on investment securities		$	(2,898	)		$	19,544			$	11,868			SI		Fixed income securities gains (losses), net
	Income tax expense (benefit)		(1,123		)		7,340				4,476
			(1,775		)		12,204				7,392
	Net unrealized losses on investment		(164,732		)		(103,720		)		(32,914		)		SI		Net impairment losses on investment securities
	securities
	Income tax benefit		(64,829		)		(40,156		)		(12,670		)
			(99,903		)		(63,564		)		(20,244		)
	Accretion of securities with noncredit-related impairment losses not expected to be sold		(2,106		)		(11,351		)		(665		)		BS		Investment securities, held-to-maturity
	Deferred income taxes		848				4,488				255				BS		Other assets
			$	(102,936	)		$	(58,223	)		$	(13,262	)
	Net unrealized gains on derivative instruments		$	2,647			$	13,062			$	37,273			SI		Interest and fees on loans
	Income tax expense		1,067				5,220				15,019
			$	1,580			$	7,842			$	22,254
	Amortization of net actuarial loss		$	(8,127	)		$	(8,983	)		$	(5,149	)		SI		Salaries and employee benefits
	Amortization of prior service credit		27				120				120				SI		Salaries and employee benefits
Income tax benefit		(3,194		)		(3,497		)		(1,979		)
		$	(4,906	)		$	(5,366	)		$	(3,050	)
1 Negative reclassification amounts indicate decreases to earnings in the statement of income and increases to balance sheet assets. The opposite applies to positive reclassification amounts.
Deferred Compensation
Deferred compensation consists of invested assets, including the Company’s common stock, which are held in rabbi trusts for certain employees and directors. At both December 31, 2013 and 2012, the cost of the common stock included in retained earnings was approximately $15.0 million. We consolidate the fair value of invested assets of the trusts along with the total obligations and include them in other assets and other liabilities, respectively, in the balance sheet. At December 31, 2013 and 2012, total invested assets were approximately $83.7 million and $72.2 million and total obligations were approximately $98.7 million and $87.2 million, respectively.
Noncontrolling Interests
On June 3, 2013, we removed the entire noncontrolling interest amount of approximately $4.8 million at that time from the Company’s balance sheet following settlement with the remaining owner.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Taxes [Abstract]	'
Income Taxes	'
	INCOME TAXES
	Income taxes (benefit) are summarized as follows:
	(In thousands)	2013			2012			2011
	Federal:
	Current	$	173,418		$	185,404		$	62,810
	Deferred	(51,475		)	(20,086		)	106,902
		121,943			165,318			169,712
	State:
	Current	29,676			(1,775		)	20,169
	Deferred	(8,642		)	29,873			8,702
		21,034			28,098			28,871
		$	142,977		$	193,416		$	198,583
	Income tax expense computed at the statutory federal income tax rate of 35% reconciles to actual income tax expense as follows:
	(In thousands)	2013			2012			2011
	Income tax expense at statutory federal rate	$	142,251		$	189,548		$	182,446
	State income taxes, net	13,672			18,264			18,766
	Other nondeductible expenses	2,574			11,291			24,361
	Nontaxable income	(17,071		)	(20,137		)	(19,691		)
	Tax credits and other taxes	(2,628		)	(3,172		)	(5,977		)
	Other	4,179			(2,378		)	(1,322		)
		$	142,977		$	193,416		$	198,583
	The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities are presented below:
	(In thousands)	December 31,
		2013			2012
	Gross deferred tax assets:
	Book loan loss deduction in excess of tax	$	315,025		$	372,206
	Pension and postretirement	16,380			33,105
	Deferred compensation	85,846			79,921
	Other real estate owned	7,099			16,306
	Security investments and derivative fair value adjustments	155,900			247,770
	Net operating losses, capital losses and tax credits	6,111			36,600
	FDIC-supported transactions	10,488			—
	Other	44,450			42,324
		641,299			828,232
	Valuation allowance	(4,261		)	(4,261		)
	Total deferred tax assets	637,038			823,971
	Gross deferred tax liabilities:
	Core deposits and purchase accounting	(13,556		)	(24,185		)
	Premises and equipment, due to differences in depreciation	(13,014		)	(16,258		)
	FHLB stock dividends	(12,668		)	(13,423		)
	Leasing operations	(94,637		)	(111,265		)
	Prepaid expenses	(8,909		)	(7,057		)
	Prepaid pension reserves	(16,909		)	(18,350		)
	Subordinated debt modification	(148,820		)	(185,733		)
	Deferred loan fees	(21,591		)	(21,209		)
	FDIC-supported transactions	—			(17,957		)
	Other	(2,553		)	(2,929		)
	Total deferred tax liabilities	(332,657		)	(418,366		)
	Net deferred tax assets	$	304,381		$	405,605
	The amount of net deferred tax assets (“DTA”) is included with other assets in the balance sheet. The $4.3 million valuation allowance at December 31, 2013 and 2012 was for certain acquired net operating loss carryforwards included in our acquisition of the remaining interests in a less significant subsidiary. At December 31, 2013, excluding the $4.3 million, the tax effect of remaining net operating loss and tax credit carryforwards was approximately $1.8 million expiring through 2030.
	We evaluate the net DTAs on a regular basis to determine whether an additional valuation allowance is required. In conducting this evaluation, we have considered all available evidence, both positive and negative, based on the more-likely-than-not criteria that such assets will be realized. This evaluation includes, but is not limited to: (1) available carryback potential to prior tax years; (2) potential future reversals of existing deferred tax liabilities, which historically have a reversal pattern generally consistent with DTAs; (3) potential tax planning strategies; and (4) future projected taxable income. Based on this evaluation, and considering the weight of the positive evidence compared to the negative evidence, we have concluded that an additional valuation allowance is not required as of December 31, 2013.
	We have an agreement that awarded us a $100 million allocation of tax credit authority under the Community Development Financial Institutions Fund established by the U.S. Government. We have invested the $100 million in a wholly-owned subsidiary which makes qualifying loans and investments. In return, we receive federal income tax credits that are recognized over seven years, including the year in which the funds were invested in the subsidiary. We recognize these tax credits for financial reporting purposes in the same year the tax benefit is recognized in our tax return. The resulting tax credits which reduced income tax expense were approximately $0.6 million in 2013, $1.2 million in 2012, and $2.4 million in 2011. In accordance with the terms of the agreement, our involvement in this program is expected to terminate during 2014.
	We have a liability for unrecognized tax benefits relating to uncertain tax positions primarily for various state tax contingencies in several jurisdictions. A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows:
	(In thousands)	2013			2012			2011
	Balance at beginning of year	$	2,385		$	13,722		$	15,366
	Tax positions related to current year:
	Additions	—			—			—
	Reductions	—			—			—
	Tax positions related to prior years:
	Additions	—			—			—
	Reductions	—			(11,337		)	—
	Settlements with taxing authorities	—			—			—
	Lapses in statutes of limitations	—			—			(1,644		)
Balance at end of year	$	2,385		$	2,385		$	13,722
At both December 31, 2013 and 2012, the liability for unrecognized tax benefits included approximately $1.6 million (net of the federal tax benefit on state issues) that, if recognized, would affect the effective tax rate. There are no gross unrecognized tax benefits that may decrease during the 12 months subsequent to December 31, 2013.
The $11.3 million reduction to this liability in 2012 was made following closure of an audit by a state taxing authority. We reduced income tax expense by a net amount including interest/penalty of $2.3 million in 2012 due to the audit closure and $1.2 million in 2011 due to lapses in statutes of limitations.
Interest and penalties related to unrecognized tax benefits are included in income tax expense in the statement of income. At both December 31, 2013 and 2012, accrued interest and penalties recognized in the balance sheet, net of any federal and/or state tax benefits, were approximately $0.3 million.
The Company and its subsidiaries file income tax returns in U.S. federal and various state jurisdictions. The Company is no longer subject to income tax examinations for years prior to 2007 for federal and state returns.
On September 19, 2013, the Internal Revenue Service issued final regulations under sections 162(a) and 263(a) of the Internal Revenue Code pertaining to the treatment of amounts paid to acquire, produce or improve tangible property. We are currently analyzing how the new regulations may affect the Company’s financial statements, but we do not anticipate any material impact.

Net_Earnings_Per_Common_Share

Net Earnings Per Common Share	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Net Earnings Per Common Share	'
	16	NET EARNINGS PER COMMON SHARE
	Basic and diluted net earnings per common share based on the weighted average outstanding shares are summarized as follows:
	(In thousands, except shares and per share amounts)		Year Ended December 31,
			2013			2012		2011
	Basic:
	Net income applicable to controlling interest		$	263,791		$	349,516	$	323,804
	Less common and preferred dividends		(6,094		)	178,277		177,775
	Undistributed earnings		269,885			171,239		146,029
	Less undistributed earnings applicable to nonvested shares		2,832			1,600		1,300
	Undistributed earnings applicable to common shares		267,053			169,639		144,729
	Distributed earnings applicable to common shares		23,916			7,321		7,292
	Total earnings applicable to common shares		$	290,969		$	176,960	$	152,021
	Weighted average common shares outstanding		183,844			183,081		182,393
	Net earnings per common share		$	1.58		$	0.97	$	0.83
	Diluted:
	Total earnings applicable to common shares		$	290,969		$	176,960	$	152,021
	Additional undistributed earnings allocated to incremental shares		—			—		41
	Diluted earnings applicable to common shares		$	290,969		$	176,960	$	152,062
	Weighted average common shares outstanding		183,844			183,081		182,393
	Additional weighted average dilutive shares		453			155		212
	Weighted average diluted common shares outstanding		184,297			183,236		182,605
	Net earnings per common share		$	1.58		$	0.97	$	0.83
	For 2013, preferred dividends included a preferred stock redemption of approximately $126 million that resulted from the redemption of the Company’s Series C preferred stock. See further discussion in Note 14.

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Share-Based Compensation	'
	17	SHARE-BASED COMPENSATION
	We have a stock option and incentive plan which allows us to grant stock options, restricted stock, restricted stock units (“RSUs”), and other awards to employees and nonemployee directors. Total shares authorized under the plan were 19,500,000 at December 31, 2013, of which 5,696,668 were available for future grants.
	All share-based payments to employees, including grants of employee stock options, are recognized in the statement of income based on their fair values. The fair value of an equity award is estimated on the grant date without regard to service or performance vesting conditions.
	Compensation expense and the related tax benefit for all share-based awards were as follows:
	(In thousands)		2013				2012				2011
	Compensation expense		$	28,052			$	31,533			$	29,019
	Reduction of income tax expense		9,123				10,724				9,768
	Compensation expense is included in salaries and employee benefits in the statement of income, with the corresponding increase included in common stock, except for the portion related to the salary stock units (“SSUs”)
	granted in 2012 and 2011, which was settled in cash. See subsequent discussion.
	We classify all share-based awards as equity instruments except for the 2012 and 2011 SSUs that were classified as liabilities. Substantially all awards of stock options, restricted stock, and RSUs have graded vesting that is recognized on a straight-line basis over the vesting period.
	As of December 31, 2013, compensation expense not yet recognized for nonvested share-based awards was approximately $25.2 million, which is expected to be recognized over a weighted average period of 2.4 years.
	For 2013, tax effects recognized from the exercise of stock options and the vesting of restricted stock and RSUs increased common stock by approximately $0.3 million. For each of 2012 and 2011, the tax effects decreased common stock by approximately $2.8 million. These amounts are included in the net activity under employee plans and related tax benefits in the statement of changes in shareholders’ equity.
	Stock Options
	Stock options granted to employees generally vest at the rate of one third each year and expire seven years after the date of grant. For all stock options granted in 2013, 2012 and 2011, we used the Black-Scholes option pricing model to estimate the fair values of stock options in determining compensation expense. The following summarizes the weighted average of fair value and the significant assumptions used in applying the Black-Scholes model for options granted:
			2013				2012				2011
	Weighted average of fair value for options granted		$	6.79			$	4.88			$	5.78
	Weighted average assumptions used:
	Expected dividend yield		1.3		%		1.5		%		1		%
	Expected volatility		32.5		%		35		%		30		%
	Risk-free interest rate		0.78		%		0.67		%		1.46		%
	Expected life (in years)		4.5				4.5				4.5
	The assumptions for expected dividend yield, expected volatility, and expected life reflect management’s judgment and include consideration of historical experience. Expected volatility is based in part on historical volatility. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant for periods corresponding with the expected life of the option.
	The following summarizes our stock option activity for the three years ended December 31, 2013:
		Number of shares			Weighted average exercise price
	Balance at December 31, 2010	6,369,239			$	47.37
	Granted	800,057			23.46
	Exercised	(46,749	)		13.6
	Expired	(1,080,867	)		57.27
	Forfeited	(107,810	)		22.74
	Balance at December 31, 2011	5,933,870			43.06
	Granted	867,968			18.87
	Exercised	(129,616	)		14.64
	Expired	(568,546	)		61.9
	Forfeited	(141,351	)		21.36
	Balance at December 31, 2012	5,962,325			38.87
	Granted	1,047,781			27.41
	Exercised	(488,479	)		20.11
	Expired	(574,157	)		70.12
	Forfeited	(72,880	)		22.25
	Balance at December 31, 2013	5,874,590			35.54
	Outstanding stock options exercisable as of:
	December 31, 2013	4,101,928			$	40.4
	December 31, 2012	4,379,630			45.26
	December 31, 2011	4,211,216			51.26
	We issue new authorized shares for the exercise of stock options. The total intrinsic value of stock options exercised was approximately $4.0 million in 2013, $0.7 million in 2012, and $0.4 million in 2011. Cash received from the exercise of stock options was $9.8 million in 2013, $1.9 million in 2012, and $0.6 million in 2011.
	Additional selected information on stock options at December 31, 2013 follows:
			Outstanding stock options											Exercisable stock options
			Number of shares			Weighted average exercise price				Weighted average remaining contractual life (years)
	Exercise price range													Number of shares	Weighted average exercise price
	$0.32 to $19.99		1,006,608			$	17.39				4.5	1		479,584	$	15.81
	$20.00 to $24.99		1,170,680			23.84					3.8			925,953	23.86
	$25.00 to $29.99		1,637,911			27.68					4.5			637,000	27.96
	$30.00 to $39.99		10,000			32.45					1.5			10,000	32.45
	$40.00 to $44.99		14,000			41.69					1.8			14,000	41.69
	$45.00 to $49.99		1,303,896			47.28					1.4			1,303,896	47.28
	$50.00 to $59.99		136,531			57.9					1			136,531	57.9
	$60.00 to $79.99		124,817			68.44					0.8			124,817	68.44
	$80.00 to $81.99		36,500			80.65					2.3			36,500	80.65
	$82.00 to $83.38		433,647			83.25					0.6			433,647	83.25
			5,874,590			35.54					3.2	1		4,101,928	40.4
	1	The weighted average remaining contractual life excludes 21,252 stock options without a fixed expiration date that were obtained with the Amegy acquisition. They expire between the date of termination and one year from the date of termination, depending upon certain circumstances.
	The aggregate intrinsic value of outstanding stock options at December 31, 2013 and 2012 was $23.6 million and $5.4 million, respectively, while the aggregate intrinsic value of exercisable options was $13.7 million and $3.2 million at the same respective dates. For exercisable options, the weighted average remaining contractual life was 2.1 years and 2.6 years at December 31, 2013 and 2012, respectively, excluding the stock options previously noted without a fixed expiration date. At December 31, 2013, 1,729,543 stock options with a weighted average exercise price of $24.38, a weighted average remaining life of 5.8 years, and an aggregate intrinsic value of $9.7 million, were expected to vest.
	The previous schedules do not include stock options for employees of our TCBO subsidiary to purchase common stock of TCBO. At December 31, 2013, there were options to purchase 44,100 TCBO shares at exercise prices from $17.85 to $20.58, expiring in June 2018. At December 31, 2013, there were 1,038,000 issued and outstanding shares of TCBO common stock.
Restricted Stock and Restricted Stock Units
Restricted stock and RSUs granted generally vest over four years. Each RSU represents a right to one share of our common stock. During the vesting period, holders of restricted stock and RSUs receive dividend equivalents. In addition, holders of restricted stock have full voting rights. Compensation expense is determined based on the number of restricted shares or RSUs granted and the market price of our common stock at the issue date.
Nonemployee directors were granted 17,444 shares of restricted stock and 4,984 RSUs in 2013; 25,536 shares of restricted stock and 7,296 RSUs in 2012; and 26,433 shares of restricted stock in 2011, which vested over six months.
The following summarizes our restricted stock activity for the three years ended December 31, 2013:
	Number of shares			Weighted average issue price
Nonvested restricted shares at December 31, 2010	1,611,643			$	26.3
Issued	616,234			23.43
Vested	(569,794	)		30.43
Forfeited	(258,229	)		24.23
Nonvested restricted shares at December 31, 2011	1,399,854			23.74
Issued	87,480			17.57
Vested	(582,361	)		25.34
Forfeited	(53,737	)		22.83
Nonvested restricted shares at December 31, 2012	851,236			22.07
Issued	56,774			24.55
Vested	(452,743	)		21.8
Forfeited	(44,317	)		24.31
Nonvested restricted shares at December 31, 2013	410,950			22.46
The following summarizes our RSU activity for the three years ended December 31, 2013:
	Number of restricted stock units			Weighted average grant price
Restricted stock units at December 31, 2010	—			$	—
Granted	146,165			23.69
Restricted stock units at December 31, 2011	146,165			23.69
Granted	726,779			18.29
Vested	(34,885	)		22.46
Forfeited	(15,306	)		20.22
Restricted stock units at December 31, 2012	822,753			19.04
Granted	949,418			25.99
Vested	(160,580	)		20.17
Forfeited	(89,553	)		20.13
Restricted stock units at December 31, 2013	1,522,038			23.19
The total fair value at grant date of restricted stock and RSUs vested during the year was $13.1 million in 2013, $15.5 million in 2012, and $17.6 million in 2011. At December 31, 2013, 400,124 shares of restricted stock and 1,146,807 RSUs were expected to vest with an aggregate intrinsic value of $12.0 million and $34.4 million, respectively.
Salary Stock Units
We granted 456,275 SSUs in 2012 and 297,620 in 2011 which vested immediately upon grant. Each SSU represents a right to one share of our common stock.
The 2012 and 2011 SSUs were classified as liabilities and were settled in cash. The amount of cash paid was determined by the number of SSUs being settled and the Company’s average closing common stock price for each trading day during the 30 trading-day period immediately prior to such payment date for the 2012 SSUs, and the Company’s closing common stock price on the date of settlement for the 2011 SSUs. Compensation expense was determined by the actual cash paid to settle the SSUs.
In January 2012, 172,550 of the 2011 SSUs were settled for $3.2 million. The balance of 125,070 2011 SSUs were settled in December 2012 for $2.7 million. In September 2012, 225,214 of the 2012 SSUs were settled for $4.5 million. The balance of 231,061 2012 SSUs were settled in March 2013 for $5.7 million.

Commitments_Guarantees_Conting

Commitments, Guarantees, Contingent Liabilities, and Related Parties	12 Months Ended
	Dec. 31, 2013
Guarantees, Commitments And Contingencies [Abstract]	'
Commitments Contingencies and Guarantees [Text Block]	'
	18	COMMITMENTS, GUARANTEES, CONTINGENT LIABILITIES, AND RELATED PARTIES
	Commitments and Guarantees
	We use certain financial instruments, including derivative instruments, in the normal course of business to meet the financing needs of our customers, to reduce our own exposure to fluctuations in interest rates, and to make a market in U.S. Government, agency, corporate, and municipal securities. These financial instruments involve, to varying degrees, elements of credit, liquidity, and interest rate risk in excess of the amounts recognized in the balance sheet. Derivative instruments are discussed in Notes 8 and 21.
	Contractual amounts of the off-balance sheet financial instruments used to meet the financing needs of our customers are as follows:
		December 31,
	(In thousands)	2013			2012
	Commitments to extend credit	$	16,174,326		$	14,277,347
	Standby letters of credit:
	Financial	779,811			774,427
	Performance	159,485			190,029
	Commercial letters of credit	80,218			91,978
	Total unfunded lending commitments	$	17,193,840		$	15,333,781
	Commitments to extend credit are agreements to lend to a customer as long as there is no violation of any condition established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require the payment of a fee. The amount of collateral obtained, if deemed necessary by us upon extension of credit, is based on our initial credit evaluation of the counterparty. Types of collateral vary, but may include accounts receivable, inventory, property, plant and equipment, and income-producing properties.
	While establishing commitments to extend credit creates credit risk, a significant portion of such commitments is expected to expire without being drawn upon. As of December 31, 2013, $4.4 billion of commitments expire in 2014. We use the same credit policies and procedures in making commitments to extend credit and conditional obligations as we do for on-balance sheet instruments. These policies and procedures include credit approvals, limits, and monitoring.
	We issue standby and commercial letters of credit as conditional commitments generally to guarantee the performance of a customer to a third party. The guarantees are primarily issued to support public and private borrowing arrangements, including commercial paper, bond financing, and similar transactions. Standby letters of credit include remaining commitments of $644 million expiring in 2014 and $295 million expiring thereafter through 2027. The credit risk involved in issuing letters of credit is essentially the same as that involved in extending loan facilities to customers. We generally hold marketable securities and cash equivalents as collateral supporting those commitments for which collateral is deemed necessary. At December 31, 2013, the Company had recorded approximately $8.8 million as a liability for these guarantees, which consisted of $5.5 million attributable to the reserve for unfunded lending commitments and $3.3 million of deferred commitment fees.
	Certain mortgage loans sold have limited recourse provisions for periods ranging from three months to one year. The amount of losses resulting from the exercise of these provisions has not been significant.
	At December 31, 2013, we had commitments for private equity and other noninterest-bearing investments of $28.3 million. These obligations have no stated maturity.
	The contractual or notional amount of financial instruments indicates a level of activity associated with a particular class of financial instrument and is not a reflection of the actual level of risk. As of December 31, 2013 and 2012, the regulatory risk-weighted values assigned to all off-balance sheet financial instruments and derivative instruments described herein were $5.6 billion and $5.0 billion, respectively.
	December 31, 2013, we were required to maintain cash balances of $179.1 million with the Federal Reserve Banks to meet minimum balance requirements in accordance with Federal Reserve Board (“FRB”) regulations.
	As of December 31, 2013, the Parent has guaranteed approximately $15 million of debt of affiliated trusts issuing trust preferred securities, as discussed in Note 13.
	Leases
	We have commitments for leasing premises and equipment under the terms of noncancelable capital and operating leases expiring from 2014 to 2052. Premises leased under capital leases at December 31, 2013 were $1.7 million and accumulated amortization was $1.3 million. Amortization applicable to premises leased under capital leases is included in depreciation expense.
	Future aggregate minimum rental payments under existing noncancelable operating leases at December 31, 2013 are as follows:
	(in thousands)
	2014		$	44,857
	2015		44,815
	2016		42,712
	2017		37,071
	2018		32,186
	Thereafter		135,869
			$	337,510
	Future aggregate minimum rental payments have been reduced by noncancelable subleases as follows: $1.1 million in 2014, $1.3 million in 2015, $1.4 million in 2016, $1.6 million in 2017, $1.6 million in 2018, and $6.3 million thereafter. Aggregate rental expense on operating leases amounted to $58.4 million in 2013, $58.7 million in 2012, and $57.9 million in 2011.
	Legal Matters
	We are subject to litigation in court and arbitral proceedings, as well as proceedings, investigations, examinations and other actions brought or considered by governmental and self-regulatory agencies. At any given time, litigation may relate to lending, deposit and other customer relationships, vendor and contractual issues, employee matters, intellectual property matters, personal injuries and torts, regulatory and legal compliance, and other matters. While most matters relate to individual claims, we are also subject to putative class action claims and similar broader claims. Current putative class actions and similar claims include the following:
	•	a complaint relating to our banking relationships with customers that allegedly engaged in wrongful telemarketing practices in which the plaintiff seeks a trebled monetary award under the federal RICO Act, Reyes v. Zions First National Bank, et. al., pending in the United States District Court for the Eastern District of Pennsylvania; and
	•	a complaint arising from our banking relationships with Frederick Berg and a number of investment funds controlled by him using the “Meridian” brand name, in which the liquidating trustee for the funds seeks an award from us, on the basis of aiding and abetting and other claims, for monetary damages suffered by victims of a fraud allegedly perpetrated by Berg, In re Consolidated Meridian Funds a/k/a Meridian Investors Trust, Mark Calvert as Liquidating Trustee, et. al. vs. Zions Bancorporation and The Commerce Bank of Washington, N.A., pending in the United States Bankruptcy Court for the Western District of Washington.
	In the third quarter of 2013, the District Court denied the plaintiff’s motion for class certification in the Reyes case. In the first quarter of 2014, the Third Circuit Court of Appeals approved the plaintiff’s motion to appeal the District Court decision.
	Discovery has been completed in the Reyes case, but has not commenced in the Meridian Funds case with respect to aiding and abetting claims.
	In the third quarter of 2013, we entered into definitive settlement agreements with respect to complaints relating to allegedly wrongful acts in our processing of overdraft fees on debit card transactions, Barlow, et. al. v. Zions First National Bank and Zions Bancorporation. The settlement agreements, which cover all of our affiliates alleged to have engaged in wrongful processing, were approved by the court in the first quarter of 2014. The aggregate amount of the settlement is reflected in our accruals for legal losses as of December 31, 2013. Another overdraft case, Sadlier, et. al. v. National Bank of Arizona, brought in the Superior Court for the State of Arizona, County of Maricopa, was dismissed with prejudice in the second quarter of 2013.
	At any given time, proceedings, investigations, examinations and other actions brought or considered by governmental and self-regulatory agencies may relate to our banking, investment advisory, trust, securities, and other products and services; our customers’ involvement in money-laundering, fraud, securities violations and other illicit activities or our policies and practices relating to such customer activities; and our compliance with the broad range of banking, securities and other laws and regulations applicable to us. At any given time, we may be in the process of responding to subpoenas, requests for documents, data and testimony relating to such matters and engaging in discussions to resolve the matters. Significant investigations and similar inquiries to which we are currently subject relate to:
	•	possible money laundering activities of a customer of one of our subsidiary banks and the anti-money laundering practices of that bank (conducted by the United States Attorneys Office for the Southern District of New York); and
	•	the practices of our subsidiary, Zions Bank; our former subsidiary, NetDeposit, LLC; and possibly other of our affiliates relating primarily to payment processing for allegedly fraudulent telemarketers and other customer types (conducted by the Department of Justice).
	These two matters appear to be ongoing.
	At least quarterly, we review outstanding and new legal matters, utilizing then available information. In accordance with applicable accounting guidance, if we determine that a loss from a matter is probable and the amount of the loss can be reasonably estimated, we establish an accrual for the loss. In the absence of such a determination, no accrual is made. Once established, accruals are adjusted to reflect developments relating to the matters.
	In our review, we also assess whether we can determine the range of reasonably possible losses for significant matters in which we are unable to determine that the likelihood of a loss is remote. Because of the difficulty of predicting the outcome of legal matters, discussed subsequently, we are able to meaningfully estimate such a range only for a limited number of matters. We currently estimate the aggregate range of reasonably possible losses for those matters to be from $0 million to roughly $50 million in excess of amounts accrued. This estimated range of reasonably possible losses is based on information available as of December 31, 2013. The matters underlying the estimated range will change from time to time, and actual results may vary significantly from this estimate. Those matters for which a meaningful estimate is not possible are not included within this estimated range and, therefore, this estimated range does not represent our maximum loss exposure.
	Based on our current knowledge, we believe that our current estimated liability for litigation and other legal actions and claims, reflected in our accruals and determined in accordance with applicable accounting guidance, is adequate and that liabilities in excess of the amounts currently accrued, if any, arising from litigation and other legal actions and claims for which an estimate as previously described is possible, will not have a material impact on our financial condition, results of operations, or cash flows. However, in light of the significant uncertainties involved in these matters, and the very large or indeterminate damages sought in some of these matters, an adverse outcome in one or more of these matters could be material to our financial condition, results of operations, or cash flows for any given reporting period.
	Any estimate or determination relating to the future resolution of litigation, arbitration, governmental or self-regulatory examinations, investigations or actions or similar matters is inherently uncertain and involves significant judgment. This is particularly true in the early stages of a legal matter, when legal issues and facts have not been well articulated, reviewed, analyzed, and vetted through discovery, preparation for trial or hearings, substantive and productive mediation or settlement discussions, or other actions. It is also particularly true with respect to class action and similar claims involving multiple defendants, matters with complex procedural requirements or substantive issues or novel legal theories, and examinations, investigations and other actions conducted or brought by governmental and self-regulatory agencies, in which the normal adjudicative process is not applicable. Accordingly, we usually are unable to determine whether a favorable or unfavorable outcome is remote, reasonably likely, or probable, or to estimate the amount or range of a probable or reasonably likely loss, until relatively late in the course of a legal matter, sometimes not until a number of years have elapsed. Accordingly, our judgments and estimates relating to claims will change from time to time in light of developments and actual outcomes will differ from our estimates. These differences may be material.
	Related Party Transactions
	We have no material related party transactions requiring disclosure. In the ordinary course of business, the Company and its subsidiary banks extend credit to related parties, including executive officers, directors, principal shareholders, and their associates and related interests. These related party loans are made in compliance with applicable banking regulations under substantially the same terms as comparable third-party lending arrangements.

Regulatory_Matters

Regulatory Matters	12 Months Ended
	Dec. 31, 2013
Regulatory Capital Requirements [Abstract]	'
Regulatory Matters	'
	19	REGULATORY MATTERS
	We are subject to various regulatory capital requirements administered by federal banking agencies. Failure to meet minimum capital requirements can initiate certain mandatory – and possibly additional discretionary – actions by regulators that, if undertaken, could have a direct material effect on our financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, we must meet specific capital guidelines that involve quantitative measures of our assets, liabilities, and certain off-balance sheet items as calculated under regulatory accounting practices. Required capital levels are also subject to judgmental review by regulators.
	Quantitative measures established by regulation to ensure capital adequacy require us to maintain minimum amounts and ratios (set forth in the following schedule) of Total and Tier 1 capital (as defined in the regulations) to risk-weighted assets (as defined), and of Tier 1 capital (as defined) to average assets (as defined). As of December 31, 2013, we exceeded all capital adequacy requirements to which we are subject.
	As of December 31, 2013, all capital ratios of the Company and each of its subsidiary banks exceeded the “well capitalized” levels under the regulatory framework for prompt corrective action. Dividends declared by our subsidiary banks in any calendar year may not, without the approval of the appropriate federal regulators, exceed specified criteria.
	In response to the recent severe economic crisis, the determination of appropriate capital levels, particularly for the Company and other “systemically important” financial institutions (“SIFIs”) as determined pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (“Dodd-Frank Act”), is being driven increasingly by the results of comprehensive “stress tests” performed by each financial institution and its various regulators. These stress tests are part of the Federal Reserve’s Comprehensive Capital Analysis and Review (“CCAR”) submission, which is required annually.
	The stress tests seek to comprehensively measure all risks to which the institution is exposed, including credit, liquidity, market, operating and other risks, the losses that could result from those risk exposures under adverse scenarios, and the institution’s resulting capital levels. Regulators have indicated that these stress test results will also be an important factor in approving the amounts and timing of capital issuances, dividends and distributions, and stock and securities repurchases.
	The actual capital amounts and ratios for the Company and its three largest subsidiary banks are as follows:
		Actual				To be well capitalized
	(Amounts in thousands)	Amount		Ratio		Amount		Ratio
	As of December 31, 2013:
	Total capital (to risk-weighted assets)
	The Company	$	6,621,539	14.67	%	$	4,514,553	10	%
	Zions First National Bank	1,997,525		14.52		1,375,347		10
	California Bank & Trust	1,252,860		13.65		917,950		10
	Amegy Bank N.A.	1,714,314		14.86		1,153,382		10
	Tier 1 capital (to risk-weighted assets)
	The Company	5,763,463		12.77		2,708,732		6
	Zions First National Bank	1,831,720		13.32		825,208		6
	California Bank & Trust	1,137,848		12.4		550,770		6
	Amegy Bank N.A.	1,569,696		13.61		692,029		6
	Tier 1 capital (to average assets)
	The Company	5,763,463		10.48		na		na 1
	Zions First National Bank	1,831,720		10.02		913,592		5
	California Bank & Trust	1,137,848		10.75		529,067		5
	Amegy Bank N.A.	1,569,696		12.09		649,387		5
	As of December 31, 2012:
	Total capital (to risk-weighted assets)
	The Company	$	6,616,521	15.05	%	$	4,396,983	10	%
	Zions First National Bank	2,034,662		14.17		1,435,690		10
	California Bank & Trust	1,222,822		14.18		862,218		10
	Amegy Bank N.A.	1,598,708		15.17		1,054,110		10
	Tier 1 capital (to risk-weighted assets)
	The Company	5,883,669		13.38		2,638,190		6
	Zions First National Bank	1,861,218		12.96		861,414		6
	California Bank & Trust	1,114,315		12.92		517,331		6
	Amegy Bank N.A.	1,466,001		13.91		632,466		6
	Tier 1 capital (to average assets)
	The Company	5,883,669		10.96		na		na 1
	Zions First National Bank	1,861,218		10.58		879,719		5
	California Bank & Trust	1,114,315		10.37		537,534		5
	Amegy Bank N.A.	1,466,001		12.03		609,319		5
	1	There is no Tier 1 leverage ratio component in the definition of a well capitalized bank holding company.
	Basel III Capital Framework
	In July 2013, the Federal Reserve published final rules establishing a new capital framework for U.S. banking organizations. These new rules implement the Basel Committee’s December 2010 framework, commonly referred to as Basel III, and will become effective for the Company on January 1, 2015, with the fully phased-in requirements becoming effective in 2018.
	Among other things, the new rules revise capital adequacy guidelines and the regulatory framework for prompt corrective action, and they modify specified quantitative measures of our assets, liabilities, and capital. The impact of these new rules will require the Company to maintain capital in excess of current “well-capitalized” regulatory standards, and in excess of historical levels.

Retirement_Plans

Retirement Plans	12 Months Ended
	Dec. 31, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Retirement Plans	'
	ETIREMENT PLANS
	Defined Benefit Plans
	Pension – This qualified noncontributory defined benefit plan has been frozen to new participation. No service-related benefits accrued for existing participants except for those with certain grandfathering provisions. Effective July 1, 2013, the plan was amended to remove the exception for grandfathered participants. The effect of this change was not significant to the plan. Benefits vest under the plan upon completion of five years of vesting service. Plan assets consist principally of corporate equity securities, mutual fund investments, real estate, and fixed income investments. Plan benefits are paid as a lump-sum cash value or an annuity at retirement age. Contributions to the plan are based on actuarial recommendation and pension regulations. Currently, it is expected that no minimum regulatory contributions will be required in 2014 or 2015.
	Supplemental Retirement – These unfunded nonqualified plans are for certain current and former employees. Each year, Company contributions to these plans are made in amounts sufficient to meet benefit payments to plan participants.
	Postretirement Medical/Life – This unfunded health care and life insurance plan provides postretirement medical benefits to certain full-time employees who meet minimum age and service requirements. The plan also provides specified life insurance benefits to certain employees. The plan is contributory with retiree contributions adjusted annually, and contains other cost-sharing features such as deductibles and coinsurance. Plan coverage is provided by self-funding or health maintenance organization options. Our contribution towards the retiree medical premium has been permanently frozen at an amount that does not increase in any future year. Retirees pay the difference between the full premium rates and our capped contribution.
	Because our contribution rate is capped, there is no effect on the postretirement plan from assumed increases or decreases in health care cost trends. Each year, Company contributions to the plan are made in amounts sufficient to meet the portion of the premiums that are the Company’s responsibility.
	The following presents the change in benefit obligation, change in fair value of plan assets, and funded status, of the plans and amounts recognized in the balance sheet as of the measurement date of December 31.
			Pension								Supplemental								Postretirement
											Retirement
	(In thousands)		2013				2012				2013				2012				2013				2012
	Change in benefit obligation:
	Benefit obligation at beginning of year		$	191,208			$	184,141			$	11,234			$	11,357			$	1,129			$	1,149
	Service cost		—				29				—				—				32				36
	Interest cost		6,885				7,558				404				460				41				47
	Actuarial (gain) loss		(16,341		)		9,693				(426		)		481				(53		)		(27		)
	Settlements		96				—				—				—				—				—
	Benefits paid		(12,756		)		(10,213		)		(936		)		(1,064		)		(87		)		(76		)
	Benefit obligation at end of year		169,092				191,208				10,276				11,234				1,062				1,129
	Change in fair value of plan assets:
	Fair value of plan assets at beginning of year		157,082				147,444				—				—				—				—
	Actual return on plan assets		27,579				19,851				—				—				—				—
	Employer contributions		—				—				936				1,064				87				76
	Benefits paid		(12,756		)		(10,213		)		(936		)		(1,064		)		(87		)		(76		)
	Fair value of plan assets at end of year		171,905				157,082				—				—				—				—
	Funded status		$	2,813			$	(34,126	)		$	(10,276	)		$	(11,234	)		$	(1,062	)		$	(1,129	)
	Amounts recognized in balance sheet:
	Asset (liability) for pension/postretirement benefits		$	2,813			$	(34,126	)		$	(10,276	)		$	(11,234	)		$	(1,062	)		$	(1,129	)
	Accumulated other comprehensive income (loss)		(39,082		)		(80,743		)		(1,968		)		(2,587		)		354				526
	Accumulated other comprehensive income (loss) consists of:
	Net gain (loss)		$	(39,082	)		$	(80,743	)		$	(1,918	)		$	(2,412	)		$	354			$	376
	Prior service credit (cost)		—				—				(50		)		(175		)		—				150
			$	(39,082	)		$	(80,743	)		$	(1,968	)		$	(2,587	)		$	354			$	526
	The liability for pension/postretirement benefits is included in other liabilities in the balance sheet. The accumulated benefit obligation is the same as the benefit obligation shown in the preceding schedule.
	The amounts in accumulated other comprehensive income (loss) at December 31, 2013 expected to be recognized as an expense component of net periodic benefit cost in 2014 for the plans are estimated as follows:
	(In thousands)		Pension				Supplemental Retirement						Postretirement
	Net gain (loss)		$	(3,187	)			$	(33	)				$	71
	Prior service credit (cost)		—					(50		)				—
			$	(3,187	)			$	(83	)				$	71
	The following presents the components of net periodic benefit cost (credit) for the plans:
			Pension												Supplemental												Postretirement
															Retirement
	(In thousands)		2013				2012				2011				2013				2012				2011				2013				2012				2011
	Service cost		$	—			$	29			$	100			$	—			$	—			$	—			$	32			$	36			$	32
	Interest cost		6,885				7,558				8,336				404				460				558				41				47				54
	Expected return on plan assets		(12,109		)		(11,308		)		(12,443		)
	Amortization of net actuarial (gain) loss		8,132				9,184				5,290				70				(114		)		(16		)		(75		)		(87		)		(125		)
	Amortization of prior service (credit) cost														124				124				124				(151		)		(244		)		(244		)
	Settlement loss		1,814												—				—				—
	Net periodic benefit cost (credit)		$	4,722			$	5,463			$	1,283			$	598			$	470			$	666			$	(153	)		$	(248	)		$	(283	)
	Weighted average assumptions based on the pension plan are the same where applicable for each of the plans and are as follows:
		2013			2012			2011
	Used to determine benefit obligation at year-end:
	Discount rate	4.6	%		3.75	%		4.25	%
	Rate of compensation increase 1	na			3.5			3.5
	Used to determine net periodic benefit cost for the years ended December 31:
	Discount rate	3.75			4.25			5.2
	Expected long-term return on plan assets	8			8			8
	Rate of compensation increase	3.5			3.5			3.5
	1	As previously discussed, the pension plan became fully frozen effective July 1, 2013 by a plan amendment that eliminated the remaining grandfather provisions. This action eliminated the need to continue using the rate of compensation increase assumption as of December 31, 2013.
	The discount rate reflects the yields available on long-term, high-quality fixed income debt instruments with cash flows similar to the obligations of the pension plan, and is reset annually on the measurement date. The expected long-term rate of return on plan assets is based on a review of the target asset allocation of the plan. This rate is intended to approximate the long-term rate of return that we anticipate receiving on the plan’s investments, considering the mix of the assets that the plan holds as investments, the expected return on these underlying investments, the diversification of these investments, and the rebalancing strategies employed. An expected long-term rate of return is assumed for each asset class and an underlying inflation rate assumption is determined. The projected rate of compensation increases is management’s estimate of future pay increases that the remaining eligible employees will receive until their retirement.
	Benefit payments to the plans’ participants, which reflect expected future service as appropriate, are estimated as follows for the years succeeding December 31, 2013:
	(In thousands)		Pension				Supplemental Retirement						Postretirement
	2014		$	10,338				$	2,056					$	96
2015		9,822					833						100
2016		9,547					1,073						105
2017		10,133					799						109
2018		10,543					794						106
Years 2019 - 2023		53,674					3,642						451
We are also obligated under other supplemental retirement plans for certain current and former employees. Our liability for these plans was $6.0 million and $6.3 million at December 31, 2013 and 2012, respectively.
For the pension plan, the investment strategy is predicated on its investment objectives and the risk and return expectations of asset classes appropriate for the plan. Investment objectives have been established by considering the plan’s liquidity needs and time horizon and the fiduciary standards under the Employee Retirement Income Security Act of 1974. The asset allocation strategy is developed to meet the plan’s long-term needs in a manner designed to control volatility and to reflect risk tolerance. Target investment allocation percentages as of December 31, 2013 are 65% in equity, 30% in fixed income and cash, and 5% in real estate assets.
The following presents the fair values of pension plan investments according to the fair value hierarchy described in Note 21, and the weighted average allocations:
(Amounts in thousands)		December 31, 2013																			December 31, 2012
		Level 1				Level 2				Level 3				Total				%			Level 1				Level 2				Level 3				Total				%
Company common stock		$	8,098											$	8,098			5			$	6,890											$	6,890			4
Mutual funds:
Equity		—												—				—			4,407												4,407				3
Debt		6,559												6,559				4			6,848												6,848				4
Insurance company pooled separate accounts:
Equity investments						$	102,603							102,603				60							$	85,938							85,938				55
Debt investments						29,091								29,091				17							27,566								27,566				18
Real estate						7,680								7,680				4							6,875								6,875				4
Guaranteed deposit account										$	12,582			12,582				7											$	13,869			13,869				9
Limited partnerships										5,292				5,292				3											4,689				4,689				3
		$	14,657			$	139,374			$	17,874			$	171,905			100			$	18,145			$	120,379			$	18,558			$	157,082			100
No transfers of assets occurred among Levels 1, 2 or 3 during 2013 or 2012.
The following describes the pension plan investments and the valuation methodologies used to measure their fair value:
Company common stock – Shares of the Company’s common stock are valued at the last reported sales price on the last business day of the plan year in the active market where individual securities are traded.
Mutual funds – These funds are valued at quoted market prices which represent the net asset values of shares held by the plan at year-end.
Insurance company pooled separate accounts – These funds are invested in by more than one investor. They are offered through separate accounts of the trustee’s insurance company and managed by internal and professional advisors. Participation units in these accounts are valued at the net asset value as the practical expedient for fair value as determined by the insurance company. Generally, there are no redemption restrictions for these funds. The redemption frequency is daily with a required notice period of one day for amounts less than $1 million and three days for amounts equal to or greater than $1 million.
Guaranteed deposit account – This account is a group annuity product issued by the trustee’s insurance company with guaranteed crediting rates established at the beginning of each calendar year. The account balance is stated at fair value as estimated by the trustee. The account is credited with deposits made, plus earnings at guaranteed crediting rates, less withdrawals and administrative expenses. The underlying investments generally include investment grade public and privately traded debt securities, mortgage loans and, to a lesser extent, real estate and other equity investments. Market value adjustments are applied at the time of redemption if certain withdrawal limits are exceeded.
Additional fair value quantitative information for the guaranteed deposit account, as measured under Level 3, is a follows:
Principal valuation techniques		Significant unobservable inputs		Range (weighted average)
				of significant input values
For the underlying investments – reported fair values when available for market traded investments; when not applicable, discounted cash flows under an income approach using U.S. Treasury rates and spreads based on cash flow timing and quality of assets.		Earnings at guaranteed crediting rate		Gross guaranteed crediting rate must be greater than or equal to contractual minimum crediting rate
		Composite market value factor		December 31,
				2013		0.988035 - 1.073235 (actual =.05329)
				2012		1.029720 - 1.119776 (actual =.08063)
The Company’s Benefits Committee evaluates the methodology and factors used, including review of the contract, economic conditions, industry and market developments, and overall credit ratings of the underlying investments.
Limited partnerships – These partnerships invest in limited partnerships, limited liability companies, or similar investment vehicles that consist of private equity investments in a wide variety of investment types, including venture and growth capital, real estate, energy and natural resources, and other private investments. The plan’s investments are estimated at fair value and determined from the partnerships’ capital account balances for the plan’s proportional interests. The capital accounts are credited with realized and unrealized earnings from the underlying investments and charged for operating expenses and distributions. Investments in these partnerships are illiquid and voluntary withdrawal is prohibited.
Fair value for these partnerships is also measured under Level 3. However, the plan does not have additional fair value quantitative information similar to the guaranteed deposit account. A variety of methodologies under Level 3 are used to estimate the fair value of underlying investments. These include best estimates of fair value by the general partner, results of any meaningful third party market transactions, consideration of financial condition and operating results of the issuer, estimates of amounts expected to be realized upon sale, and any other factors considered relevant by the general partner. The information that is provided by the limited partnerships is included in the annual review process of the Company’s Benefits Committee, which has concluded that the fair values were developed in accordance with GAAP.
Shares of Company common stock were 270,305 and 321,964 at December 31, 2013 and 2012, respectively. Dividends received by the plan were approximately $41 thousand in 2013 and $15 thousand in 2012.
The following reconciles the beginning and ending balances of assets measured at fair value on a recurring basis using Level 3 inputs:
		Level 3 Instruments 1
		Year Ended December 31,
		2013												2012
(In thousands)		Guaranteed deposit account						Limited partnerships						Guaranteed deposit account						Limited partnerships
Balance at beginning of year			$	13,869					$	4,689					$	12,476					$	4,149
Net increases (decreases) included in plan statement of change in net assets available for benefits:
Net operating fees and expenses			(346		)				(83		)				(362		)				(59		)
Net appreciation (depreciation) in fair value of investments:
Realized			—						(74		)				—						(98		)
Unrealized			(398		)				732						372						542
Interest and dividends			486						—						525						—
Purchases			11,722						760						11,070						1,005
Sales			(12,751		)				—						(10,212		)				—
Settlements			—						(732		)				—						(850		)
Balance at end of year			$	12,582					$	5,292					$	13,869					$	4,689
1Certain 2012 amounts have been reclassified, including disclosure on a gross basis, to conform with the presentation in 2013.
Defined Contribution Plan
The Company offers a 401(k) and employee stock ownership plan under which employees select from several investment alternatives. Employees can contribute up to 80% of their earnings subject to the annual maximum allowed contribution. The Company matches 100% of the first 3% of employee contributions and 50% of the next 2% of employee contributions. Matching contributions to participants, which were shares of the Company’s common stock purchased in the open market, amounted to $22.7 million in 2013, $21.6 million in 2012, and $21.0 million in 2011.
The 401(k) plan also has a noncontributory profit sharing feature which is discretionary and may range from 0% to 6% of eligible compensation based upon the Company’s return on average common equity for the year. For all years presented, the profit sharing expense was computed at a contribution rate of 2%, and amounted to $11.8 million for both 2013 and 2012, and $11.7 million for 2011. The profit sharing contribution to participants consisted of shares of the Company’s common stock purchased in the open market.

Fair_Value

Fair Value	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value	'
	Fair Value Measurement
	Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. To measure fair value, a hierarchy has been established that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs. This hierarchy uses three levels of inputs to measure the fair value of assets and liabilities as follows:
	Level 1 – Quoted prices in active markets for identical assets or liabilities in active markets that the Company has the ability to access;
	Level 2 – Observable inputs other than Level 1 including quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets or liabilities in less active markets, observable inputs other than quoted prices that are used in the valuation of an asset or liability, and inputs that are derived principally from or corroborated by observable market data by correlation or other means; and
	Level 3 – Unobservable inputs supported by little or no market activity for financial instruments whose value is determined by pricing models, discounted cash flow methodologies, or similar techniques, as well as instruments for which the determination of fair value requires significant management judgment or estimation.
	The level in the fair value hierarchy within which the fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measure in its entirety. Market activity is presumed to be orderly in the absence of evidence of forced or disorderly sales, although such sales may still be indicative of fair value. Applicable accounting guidance precludes the use of blockage factors or liquidity adjustments due to the quantity of securities held by an entity.
	We use fair value to measure certain assets and liabilities on a recurring basis when fair value is the primary measure for accounting. Fair value is used on a nonrecurring basis to measure certain assets when adjusting carrying values, such as the application of lower of cost or fair value accounting, including recognition of impairment on assets. Fair value on a nonrecurring basis is also used when providing required disclosures for certain financial instruments.
	Fair Value Policies and Procedures
	We have various policies, processes and controls in place to ensure that fair values are reasonably developed, reviewed and approved for use. These include a Securities Valuation and Securitization Oversight Committee (“SOC”) comprised of executive management that reports directly to the Board of Directors. The SOC reviews and approves on a quarterly basis the key components of fair value estimation, including critical valuation assumptions for Level 3 modeling. Attribution analyses are completed when significant changes occur between quarters. The SOC also requires quarterly back testing of certain significant assumptions. A Model Risk Management Group conducts model validations, including the internal model, and sets policies and procedures for revalidation, including the timing of revalidation.
	Third Party Service Providers
	We use a third party pricing service to provide pricing for approximately 90% of our AFS Level 2 securities, and an internal model that uses certain third party models to estimate fair value for approximately 93% of our AFS Level 3 securities. Fair values for the remaining AFS Level 2 and Level 3 securities generally use standard form discounted cash flow modeling with certain inputs corroborated by market data.
	For Level 2 securities, the third party pricing service provides documentation on an ongoing basis that presents market corroborative data, including detail pricing information and market reference data. We review, test and validate this information as appropriate.
	For Level 3 securities, we review and evaluate on a quarterly basis the relevant third party modeling assumptions and compare them to those used in our own internal models. We also compare modeling results and valuations with our own information about market trends and trading data.
	Absent observable trade data, we do not adjust prices from our third party sources. The procedures described help ensure that resulting fair value estimates were determined in accordance with applicable accounting guidance.
	The following describes the hierarchy designations, valuation methodologies, and key inputs to measure fair value on a recurring basis for designated financial instruments:
	Available-for-Sale and Trading Securities
	U.S. Treasury, Agencies and Corporations
	U.S. Treasury securities are measured under Level 1 using quoted market prices. U.S. agencies and corporations are measured under Level 2 generally using the previously-discussed third party pricing service.
	Municipal Securities
	Municipal securities are measured under Level 2 using the third party pricing service, or under Level 3 using a discounted cash flow approach. Valuation inputs include BBB and Baa municipal curves, as well as FHLB and LIBOR/Swap curves. Additional valuation inputs include internal credit scoring, and security- and client-type groupings.
	Asset-Backed Securities: Trust Preferred Collateralized Debt Obligations
	The CDO portfolio is measured under Level 3 primarily with the internal model using an income-based cash flow modeling approach incorporating several methodologies. The Company inputs its own key valuation assumptions:
	Trust preferred – banks and insurance – We use an internal model for our bank and insurance CDO securities. Our “ratio-based approach” utilizes a statistical regression of regulatory ratios we have identified as predictive of future bank failures and bank holding company defaults to create a credit-specific PD for each bank issuer. The approach generally references trailing quarter regulatory data, financial ratios and macroeconomic factors.
	For approximately one third of bank collateral issuers at December 31, 2013, which are public companies, we use the higher of the PDs from a third party proprietary reduced form model dependent, upon equity valuation, and that produced by our ratio-based approach.
	The PDs used depend on whether the collateral is performing or deferring. Deferring PDs increase, all else being equal, as the deferral ages and approaches the end of its allowable five-year deferral period. The internal model includes the expectation that deferrals that do not default will pay their contractually required back interest and return to a current status at the end of five years. Estimates of loss for the individual pieces of underlying collateral are aggregated to arrive at a pool-level loss rate for each CDO. These loss assumptions are applied to the CDO’s structure to generate cash flow projections for each tranche of the CDO.
	We utilize a present value technique to identify both the OTTI present in the CDO tranches and to estimate fair value. To estimate fair value, we discount the credit-adjusted cash flows of each CDO tranche at a tranche-specific discount rate which reflects the risk that the actual cash flow may vary from the expected credit-adjusted cash flow for that CDO tranche. This rate is consistent with market participants’ assumptions and is applied to credit adjusted cash flows. We follow applicable guidance on illiquid markets such that risk premiums should be reflective of an orderly transaction between market participants under current market conditions. Because these securities are not traded on exchanges and trading prices are not posted on the TRACE® system (Trade Reporting and Compliance Engine®), we also seek information from market participants to obtain trade price information.
	The discount rate assumption used for valuation purposes for each CDO tranche is derived from trading yields on publicly traded trust preferred securities as well as observed trades in our CDO tranches and tranches within our CDO in accordance with applicable accounting guidance. The data set generally includes one or more publicly-traded trust preferred securities in deferral with regard to the payment of current interest and observed trades in our CDO tranches which appeared to be either orderly (that is, not distressed or forced); or whose orderliness could not be definitively refuted. Trading data is generally limited to a few transactions in each of several of our original AAA-rated tranches, several of our original A-rated tranches, and many trades of tranches within our same CDO.
	The effective yields on the traded securities are then used to determine a relationship between the effective yield and the loss or downside variability of the returns of each CDO security. The loss/downside variability for this purpose is a measure of the downside variability of cash flows from the mean estimate of cash flow. This relationship is then considered along with other third party or market data to identify appropriate discount rates to be applied to the CDOs.
	CDO tranches with greater uncertainty in their cash flows are discounted at rates higher than those market participants would use for tranches with more stable expected cash flows (e.g., as a result of more subordination and/or better credit quality in the underlying collateral).
	During 2013, deferral and default assumptions increased consistent with certain observed deferrals continuing past the allowable five years without resolution, and our inclusion of deferral vintage outcome data for the recent cycle. We expect to recreate or recalibrate deferral resolution experience as the outcomes for more deferring issuers become known over time.
	Trust preferred – REITS, Other (including ABS CDOs) – Most of these CDOs are measured under Level 3 by other third party pricing services using their proprietary models. Our review and evaluation of their estimates was previously discussed.
	Auction Rate Securities
	Auction rate securities are measured under Level 3 primarily using valuation inputs that include AAA corporate bond yield curves, municipal yield curves, credit ratings and leverage of each closed-end fund, market yields for commercial paper, and any observable trade commentaries.
	Bank-Owned Life Insurance
	Bank-owned life insurance is measured under Level 2 according to reported cash surrender values (“CSVs”) of the insurance contracts. Nearly all CSVs are based on valuations and earnings of the underlying assets in the insurance companies’ general accounts. The underlying investments include predominantly fixed income securities consisting of investment grade corporate bonds and various types of mortgage instruments. Average duration ranges from five to eight years. Management regularly reviews investment performance, including concentrations of investments and regulatory restrictions.
	Private Equity Investments
	Private equity investments are measured under Level 2 or Level 3. The Other Equity Investments Committee, consisting of executives familiar with the investments, reviews periodic financial information, including audited financial statements when available. The amount of unfunded commitments to these partnerships is disclosed in Note 18. Certain restrictions apply for the redemption of these investments. Approximately $58 million of private equity investments at December 31, 2013 are prohibited by the Volcker Rule.
	Private equity investments under Level 2 include partnerships that invest in certain financial services and real estate companies, some of which are publicly traded. Fair values are determined from net asset values, or their equivalents, provided by the partnerships. These fair values are determined on the last business day of the month using values from the primary exchange. In the case of illiquid or nontraded assets, the partnerships obtain fair values from independent sources.
	Private equity investments under Level 3 are recorded at acquisition cost, which is initially considered the best indication of fair value. Subsequent adjustments to recorded fair values are based on current and projected financial performance, recent financing activities, economic and market conditions, market comparables, market liquidity, sales restrictions, and other factors.
	Derivatives
	Derivatives are measured according to their classification as either exchange-traded or over-the-counter (“OTC”). Exchange-traded derivatives consist of forward currency exchange contracts measured under Level 1 because they are traded in active markets. OTC derivatives, including those for customers, consist of interest rate swaps and options. These derivatives are measured under Level 2 using third party services. Observable market inputs include yield curves (the LIBOR swap curve and applicable basis swap curves), foreign exchange rates, commodity prices, option volatilities, counterparty credit risk, and other related data. Credit valuation adjustments are required to reflect nonperformance risk for both the Company and the respective counterparty. These adjustments are determined generally by applying a credit spread to the total expected exposure of the derivative. Amounts disclosed in the following schedules differ from the presentation in Note 8 because they are presented on a net basis. The estimation of fair value for the TRS is discussed in Note 8.
	Securities Sold, Not Yet Purchased
	Securities sold, not yet purchased are measured under Level 1 using quoted market prices. If not available, quoted prices under Level 2 for similar securities are used.
	Quantitative Disclosure by Fair Value Hierarchy
	Assets and liabilities measured at fair value by class on a recurring basis are summarized as follows:
		December 31, 2013
	(In thousands)	Level 1			Level 2			Level 3				Total
	ASSETS
	Investment securities:
	Available-for-sale:
	U.S. Treasury, agencies and corporations				$	2,059,105						$	2,059,105
	Municipal securities				55,602			$	10,662			66,264
	Asset-backed securities:
	Trust preferred – banks and insurance							1,238,820				1,238,820
	Trust preferred – real estate investment trusts							22,996				22,996
	Auction rate							6,599				6,599
	Other (including ABS CDOs)				2,099			25,800				27,899
	Mutual funds and other	$	259,750		20,453							280,203
		259,750			2,137,259			1,304,877				3,701,886
	Trading account				34,559							34,559
	Other noninterest-bearing investments:
	Bank-owned life insurance				466,428							466,428
	Private equity				4,822			82,410				87,232
Other assets:
Derivatives:
Interest rate related and other				1,100							1,100
Interest rate swaps for customers				55,447							55,447
Foreign currency exchange contracts	9,614										9,614
	9,614			56,547							66,161
	$	269,364		$	2,699,615		$	1,387,287			$	4,356,266
LIABILITIES
Securities sold, not yet purchased	$	73,606									$	73,606
Other liabilities:
Derivatives:
Interest rate related and other				$	1,004						1,004
Interest rate swaps for customers				54,688							54,688
Foreign currency exchange contracts	8,643										8,643
Total return swap							$	4,062			4,062
	8,643			55,692			4,062				68,397
Other							241				241
	$	82,249		$	55,692		$	4,303			$	142,244
	December 31, 2012
(In thousands)	Level 1			Level 2			Level 3				Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	102,982		$	1,692,637						$	1,795,619
Municipal securities				59,445			$	16,551			75,996
Asset-backed securities:
Trust preferred – banks and insurance				121			949,271				949,392
Trust preferred – real estate investment trusts							16,403				16,403
Auction rate							6,515				6,515
Other (including ABS CDOs)				4,214			15,160				19,374
Mutual funds and other	219,214			8,797							228,011
	322,196			1,765,214			1,003,900				3,091,310
Trading account				28,290							28,290
Other noninterest-bearing investments:
Bank-owned life insurance				455,719							455,719
Private equity				5,132			64,223				69,355
Other assets:
Derivatives:
Interest rate related and other				2,850							2,850
Interest rate swaps for customers				79,579							79,579
Foreign currency exchange contracts	4,404										4,404
	4,404			82,429							86,833
	$	326,600		$	2,336,784		$	1,068,123			$	3,731,507
LIABILITIES
Securities sold, not yet purchased	$	26,735									$	26,735
Other liabilities:
Derivatives:
Interest rate related and other				$	1,142						1,142
Interest rate swaps for customers				82,926							82,926
Foreign currency exchange contracts	3,159										3,159
Total return swap							$	5,127			5,127
	3,159			84,068			5,127				92,354
Other							124				124
	$	29,894		$	84,068		$	5,251			$	119,213
No transfers of assets or liabilities occurred among Levels 1, 2 or 3 during 2013 or 2012.
The fair value of the Level 3 bank and insurance CDO portfolio would generally be adversely affected by significant increases in the constant default rate (“CDR”) for performing collateral, the loss percentage expected from deferring collateral, and the discount rate used. The fair value of the portfolio would generally be positively affected by increases in interest rates and prepayment rates. For a specific tranche within a CDO, the directionality of the fair value change for a given assumption change may differ depending on the seniority level of the tranche. For example, faster prepayment may increase the fair value of a senior most tranche of a CDO while decreasing the fair value of a more junior tranche.
Reconciliation of Level 3 Fair Value Measurements
The following reconciles the beginning and ending balances of assets and liabilities that are measured at fair value by class on a recurring basis using Level 3 inputs:
	Level 3 Instruments
	Year Ended December 31, 2013
(In thousands)	Municipal			Trust			Trust				Auction				Other				Private			Derivatives			Other
	securities			preferred – banks and insurance			preferred				rate				asset-backed				equity						liabilities
							– REIT												investments
Balance at December 31, 2012	$	16,551		$	949,271		$	16,403			$	6,515			$	15,160			$	64,223		$	(5,127	)	$	(124	)
Total net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	41			3,166			254				3				82
Dividends and other investment income																			6,662
Fair value and nonhedge derivative loss																						(21,753		)
Equity securities gains, net																			3,732
Fixed income securities gains (losses), net	239			(3,160		)	(201		)						55
Net impairment losses on investment securities				(136,221		)	(17,430		)						(11,080		)
Other noninterest expense																									(117		)
Other comprehensive	1,540			377,357			24,081				81				6,950
income (loss)
Purchases																			10,548
Sales				(66,303		)	(111		)						(1		)		(2,244		)
Redemptions and paydowns	(7,709		)	(60,989		)									(5,780		)		(511		)	22,818
Reclassifications				175,699											20,414
Balance at December 31, 2013	$	10,662		$	1,238,820		$	22,996			$	6,599			$	25,800			$	82,410		$	(4,062	)	$	(241	)
	Level 3 Instruments
	Year Ended December 31, 2012
(In thousands)	Municipal			Trust			Trust				Auction				Other				Private			Derivatives			Other
	securities			preferred – banks and insurance			preferred				rate				asset-backed				equity						liabilities
							– REIT												investments
Balance at December 31, 2011	$	17,381		$	929,356		$	18,645			$	70,020			$	43,546			$	62,327		$	(5,422	)	$	(86	)
Total net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	102			7,126			224				4				232
Dividends and other investment income																			10,399
Fair value and nonhedge derivative loss																						(21,707		)
Equity securities gains, net																			11,478
Fixed income securities gains (losses), net	9			20,906							4,161				(5,762		)
Net impairment losses on investment securities				(96,707		)
Other noninterest expense																									(38		)
Other comprehensive	(291		)	218,001			(2,466		)		1,330				8,343
income (loss)
Purchases																			9,043
Sales																			(15,872		)
Redemptions and paydowns	(650		)	(129,411		)					(69,000		)		(31,199		)		(13,152		)	22,002
Balance at December 31, 2012	$	16,551		$	949,271		$	16,403			$	6,515			$	15,160			$	64,223		$	(5,127	)	$	(124	)
The preceding reconciling amounts using Level 3 inputs include the following realized gains (losses):
(In thousands)	Year Ended
	December 31,
	2013			2012
Dividends and other investment income	$	(133	)	$	1,635
Equity securities gains (losses), net	(2,452		)	10,359
Fixed income securities gains (losses), net	(3,067		)	19,314
Following is a summary of quantitative information relating to the principal valuation techniques and significant unobservable inputs for Level 3 instruments measured on a recurring basis:
	Level 3 Instruments
	Quantitative information at December 31, 2013
(Dollar amounts in thousands)	Fair value			Principal valuation techniques		Significant unobservable inputs	Range of inputs
							(% annually)
Asset-backed securities:
Trust preferred – predominantly banks	$	921,819		Discounted cash flow		Constant prepayment rate	until 2016 – 5.50% to 20.73%
				Market comparables
							2016 to maturity – 3.0%
						Constant default rate	yr 1 – 0.30% to 1.94%
							yrs 2-5 – 0.49% to 1.14%
							yrs 6 to maturity – 0.58% to 0.65%
						Loss given default	100%
						Loss given deferral	14.39% to 100%
						Discount rate	5.6% to 7.7%
						(spread over forward LIBOR)
Trust preferred – predominantly insurance	346,390			Discounted cash flow		Constant prepayment rate	until maturity – 5.0%
				Market comparables
						Constant default rate	yr 1 – 0.38% to 1.03%
							yrs 2-5 – 0.53% to 0.89%
							yrs 6 to maturity – 0.50% to 0.55%
						Loss given default	100%
						Loss given deferral	2.18% to 30.13%
						Discount rate	3.72% to 6.49%
						(spread over forward LIBOR)
Trust preferred – individual banks	22,324			Market comparables		Yield	6.6% to 7.8%
						Price	81.25% to 109.6%
Trust preferred – real estate investment trust	22,996			Discounted cash flow		Constant prepayment rate	until maturity – 0.0%
				Market comparables
						Constant default rate	yr 1 – 4.1% to 10.6%
							yrs 2-3 – 4.6% to 5.5%
							yrs 4-6 – 1.0%
							yrs 7 to maturity – 0.50%
						Loss given default	60% to 100%
						Discount rate	5.5% to 15%
						(spread over forward LIBOR)
Other (predominantly ABS CDOs)	25,800			Discounted cash flow		Constant default rate	0.01% to 100%
						Loss given default	70% to 92%
						Discount rate	9% to 22%
						(spread over forward LIBOR)
	Level 3 Instruments
	Quantitative information at December 31, 2012
(Dollar amounts in thousands)	Fair value			Principal valuation techniques		Significant unobservable inputs	Range of inputs
							(% annually)
Asset-backed securities:
Trust preferred – predominantly banks	$	798,458		Discounted cash flow		Constant prepayment rate	until 2016 – 10.0% to 21.24%
				Market comparables
							2016 to maturity – 3.0%
						Constant default rate	yr 1 – 0.30% to 1.97%
							yrs 2-5 – 0.47% to 0.67%
							yrs 6 to maturity – 0.58% to 0.68%
						Loss given default	100%
						Loss given deferral	9.69% to 100%
						Discount rate	7.7% to 13.4%
						(spread over forward LIBOR)
Trust preferred – predominantly insurance	256,104			Discounted cash flow		Constant prepayment rate	until maturity – 4.5%
				Market comparables
						Constant default rate	yr 1 – 0.30% to 0.32%
							yrs 2-5 – 0.47% to 0.50%
							yrs 6 to maturity – 0.50% to 0.54%
						Loss given default	100%
						Loss given deferral	2.18%
						Discount rate	3.75% to 16.21%
						(spread over forward LIBOR)
Trust preferred – individual banks	20,910			Market comparables		Yield	9.4% to 9.7%
						Price	73.1% to 108.0%
Trust preferred – real estate investment trust	16,403			Discounted cash flow		Constant prepayment rate	until maturity – 0.0%
				Market comparables
						Constant default rate	yr 1 – 5.1% to 8.6%
							yrs 2-3 – 4.2% to 7.1%
							yrs 4-6 – 1.0%
							yrs 7 to maturity – 0.50%
						Loss given default	60% to 100%
						Discount rate	6.5% to 23%
						(spread over forward LIBOR)
Other (predominantly ABS CDOs)	15,160			Discounted cash flow		Constant default rate	0.01% to 100%
						Loss given default	70% to 92%
						Discount rate	9% to 22%
						(spread over forward LIBOR)
Nonrecurring Fair Value Measurements
Included in the balance sheet amounts are the following amounts of assets that had fair value changes measured on a nonrecurring basis:
(In thousands)	Fair value at December 31, 2013														Gains (losses) from
															fair value changes
															Year Ended
	Level 1			Level 2			Level 3				Total				31-Dec-13
ASSETS
HTM securities adjusted for OTTI	$	—		$	—		$	8,483			$	8,483				$	(403	)
Private equity investments, carried at cost	—			—			13,270				13,270					(5,700		)
Impaired loans	—			11,765			—				11,765					(1,575		)
Other real estate owned	—			24,684			—				24,684					(13,158		)
	$	—		$	36,449		$	21,753			$	58,202				$	(20,836	)
(In thousands)	Fair value at December 31, 2012														Gains (losses) from
	Level 1			Level 2			Level 3				Total				fair value changes Year Ended December 31, 2012
ASSETS
HTM securities adjusted for OTTI	$	—		$	—		$	23,524			$	23,524				$	(7,423	)
Private equity investments, carried at cost	—			—			13,520				13,520					(2,176		)
Impaired loans	—			44,448			—				44,448					(4,300		)
Other real estate owned	—			58,954			—				58,954					(20,641		)
	$	—		$	103,402		$	37,044			$	140,446				$	(34,540	)
We recognized net gains of $15.6 million in 2013 and $15.3 million in 2012 from the sale of OREO properties that had a carrying value at the time of sale of approximately $82.5 million in 2013 and $163.3 million in 2012. Previous to their sale in these years, we recognized impairment on these properties of $0.8 million in 2013 and $2.7 million in 2012.
HTM securities adjusted for OTTI were measured at fair value using the same methodology for trust preferred CDO securities.
Private equity investments carried at cost were measured at fair value for impairment purposes according to the methodology previously discussed. Amounts of private equity investments carried at cost were $53.6 million and $74.8 million at December 31, 2013 and 2012, respectively. Amounts of other noninterest-bearing investments carried at cost were $248.4 million and $255.6 million at December 31, 2013 and 2012, respectively, which were comprised of Federal Reserve, Federal Home Loan Bank, and Farmer Mac stock.
Impaired (or nonperforming) loans that are collateral-dependent were measured at fair value based on the fair value of the collateral. OREO was measured at fair value at the lower of cost or fair value based on property appraisals at the time the property is recorded in OREO and as appropriate thereafter.
Measurement of fair value for collateral-dependent loans and OREO was based on third party appraisals that utilize one or more valuation techniques (income, market and/or cost approaches). Any adjustments to calculated fair value were made based on recently completed and validated third party appraisals, third party appraisal services, automated valuation services, or our informed judgment. Evaluations were made to determine that the appraisal process met the relevant concepts and requirements of applicable accounting guidance.
Automated valuation services may be used primarily for residential properties when values from any of the previous methods were not available within 90 days of the balance sheet date. These services use models based on market, economic, and demographic values. The use of these models has only occurred in a very few instances and the related property valuations have not been significant to consider disclosure under Level 3 rather than Level 2.
Impaired loans not collateral-dependent were measured at fair valued based on the present value of future cash flows discounted at the expected coupon rates over the lives of the loans. Because the loans were not discounted at market interest rates, the valuations do not represent fair value and have been excluded from the nonrecurring fair value balance in the preceding schedules.
Fair Value of Certain Financial Instruments
Following is a summary of the carrying values and estimated fair values of certain financial instruments:
	December 31, 2013								December 31, 2012
(Amounts in thousands)	Carrying			Estimated			Level		Carrying				Estimated				Level
	value			fair value					value				fair value
Financial assets:
HTM investment securities	$	588,981		$	609,547		3		$	756,909			$	674,741			3
Loans and leases (including loans held for sale), net of allowance	38,468,402			38,088,242			3		37,020,811				37,024,198				3
Financial liabilities:
Time deposits	2,593,038			2,602,955			2		2,962,931				2,988,714				2
Foreign deposits	1,980,161			1,979,805			2		1,804,060				1,803,625				2
Other short-term borrowings	—			—			2		5,409				5,421				2
Long-term debt (less fair value hedges)	2,269,762			2,423,643			2		2,329,323				2,636,422				2
This summary excludes financial assets and liabilities for which carrying value approximates fair value. For financial assets, these include cash and due from banks and money market investments. For financial liabilities, these include demand, savings and money market deposits, and federal funds purchased and security repurchase agreements. The estimated fair value of demand, savings and money market deposits is the amount payable on demand at the reporting date. Carrying value is used because the accounts have no stated maturity and the customer has the ability to withdraw funds immediately. Also excluded from the summary are financial instruments recorded at fair value on a recurring basis, as previously described.
HTM investment securities primarily consist of municipal securities and bank and insurance trust preferred CDOs. They were measured at fair value according to the methodologies previously discussed for these investment types.
Loans are measured at fair value according to their status as nonimpaired or impaired. For nonimpaired loans, fair value is estimated by discounting future cash flows using the LIBOR yield curve adjusted by a factor which reflects the credit and interest rate risk inherent in the loan. These future cash flows are then reduced by the estimated “life-of-the-loan” aggregate credit losses in the loan portfolio. These adjustments for lifetime future credit losses are derived from the methods used to estimate the ALLL for our loan portfolio and are adjusted quarterly as necessary to reflect the most recent loss experience. Impaired loans are already considered to be held at fair value, except those whose fair value is determined by discounting cash flows, as discussed previously. See Impaired Loans in Note 7 for details on the impairment measurement method for impaired loans. Loans, other than those held for sale, are not normally purchased and sold by the Company, and there are no active trading markets for most of this portfolio.
Time and foreign deposits, and other short-term borrowings, are measured at fair value by discounting future cash flows using the LIBOR yield curve to the given maturity dates.
Long-term debt is measured at fair value based on actual market trades (i.e., an asset value) when available, or discounting cash flows to maturity using the LIBOR yield curve adjusted for credit spreads.
These fair value disclosures represent our best estimates based on relevant market information and information about the financial instruments. Fair value estimates are based on judgments regarding current economic conditions, future expected loss experience, risk characteristics of the various instruments, and other factors. These estimates are subjective in nature, involve uncertainties and matters of significant judgment, and cannot be determined with precision. Changes in these methodologies and assumptions could significantly affect the estimates.

Operating_Segment_Information

Operating Segment Information	12 Months Ended
	Dec. 31, 2013
Operating Segment Information [Abstract]	'
Segment Reporting Disclosure [Text Block]	'
	22	OPERATING SEGMENT INFORMATION
	We manage our operations and prepare management reports and other information with a primary focus on geographical area. As of December 31, 2013, we operate eight community/regional banks in distinct geographical areas. Performance assessment and resource allocation are based upon this geographical structure. The operating segment identified as “Other” includes the Parent, Zions Management Services Company (“ZMSC”), certain nonbank financial service subsidiaries, TCBO, and eliminations of transactions between segments.
	The Parent’s financial statements in Note 24 provide more information about the Parent’s activities. The condensed statement of income identifies the components of income and expense which affect the operating amounts presented in the Other segment.
	ZMSC provides internal technology and operational services to affiliated operating businesses of the Company. ZMSC charges most of its costs to the affiliates on an approximate break-even basis. As a result, the impact of ZMSC’s operations on a net basis has not been significant to the operating amounts in the Other segment.
	The accounting policies of the individual operating segments are the same as those of the Company. Transactions between operating segments are primarily conducted at fair value, resulting in profits that are eliminated for reporting consolidated results of operations. Operating segments pay for centrally provided services based upon estimated or actual usage of those services.
	The following is a summary of selected operating segment information:
	(In millions)	Zions Bank										CB&T												Amegy
		2013			2012			2011				2013				2012				2011				2013				2012				2011
	CONDENSED INCOME STATEMENT
	Net interest income	$	595		$	657.1		$	683.3			$	469			$	466.7			$	506.9			$	381.5			$	371.5			$	391.2
	Provision for loan losses	(40.5		)	88.3			128.3				(16.7		)		(7.9		)		(9.5		)		4.2				(63.9		)		(37.4		)
	Net interest income after provision for loan losses	635.5			568.8			555				485.7				474.6				516.4				377.3				435.4				428.6
	Net impairment losses on investment securities	(7.7		)	(3.2		)	(0.3		)		—				—				(0.5		)		—				—				—
	Loss on sale of investment securities to Parent	—			—			—				—				(9.2		)		(43.9		)		—				—				—
	Other noninterest income	199.9			221.4			219.2				79.3				75.3				105.4				146.4				156.1				138.4
	Noninterest expense	481.4			493.1			547.4				352.4				330.2				355				333.4				340.2				324.9
	Income (loss) before income taxes	346.3			293.9			226.5				212.6				210.5				222.4				190.3				251.3				242.1
	Income tax expense (benefit)	121.7			104.6			76				72.5				83.4				88				59.8				84.6				80.5
	Net income (loss)	$	224.6		$	189.3		$	150.5			$	140.1			$	127.1			$	134.4			$	130.5			$	166.7			$	161.6
	YEAR-END BALANCE SHEET DATA
	Total assets	$	18,590		$	17,930		$	17,531			$	10,923			$	11,069			$	10,894			$	13,705			$	13,119			$	12,282
	Cash and due from banks	363			650			416				157				205				175				437				754				406
	Money market investments	3,888			2,855			2,198				1,108				1,449				1,090				2,551				2,308				2,222
	Total securities	1,520			1,273			1,460				331				350				335				362				439				475
	Total loans	12,259			12,490			12,751				8,574				8,259				8,392				9,217				8,450				8,031
	Total deposits	16,257			15,575			14,905				9,327				9,483				9,192				11,198				10,706				9,731
	Shareholder’s equity:
	Preferred equity	280			280			480				162				162				262				226				251				488
	Common equity	1,523			1,519			1,379				1,342				1,322				1,270				1,845				1,725				1,630
	Noncontrolling interests	—			—			—				—				—				—				—				—				—
	Total shareholder’s equity	1,803			1,799			1,859				1,504				1,484				1,532				2,071				1,976				2,118
	(In millions)											NSB													Vectra
		2013			2012			2011				2013					2012				2011				2013				2012				2011
	CONDENSED INCOME STATEMENT
	Net interest income	$	163		$	167.7		$	172.1			$	113.6		—		$	123.4			$	135			$	102.7			$	108.7			$	104.3
	Provision for loan losses	(15.0		)	(0.6		)	9.6				(12.0		)	—		(9.6		)		(38.3		)		(4.9		)		7				14
	Net interest income after provision for loan losses	178			168.3			162.5				125.6					133				173.3				107.6				101.7				90.3
	Net impairment losses on investment securities	—			—			—				(3.3		)	—		—				—				(0.1		)		(0.6		)		(0.8		)
	Loss on sale of investment securities to Parent	—			—			—				—			—		—				—				—				—				(28.9		)
	Other noninterest income	35			32.1			34.4				37.8			—		33.7				37.4				24.6				25.3				21.7
	Noninterest expense	142.7			152.5			154.7				131.8					133.6				139.3				99.5				98.3				100.7
	Income (loss) before income taxes	70.3			47.9			42.2				28.3					33.1				71.4				32.6				28.1				(18.4		)
	Income tax expense (benefit)	26.4			17			16.7				9.5					11.3				24.8				11.2				9.2				(8.3		)
	Net income (loss)	$	43.9		$	30.9		$	25.5			$	18.8				$	21.8			$	46.6			$	21.4			$	18.9			$	(10.1	)
	YEAR-END BALANCE SHEET DATA
	Total assets	$	4,579		$	4,575		$	4,485			$	3,980				$	4,061			$	4,100			$	2,571			$	2,511			$	2,341
	Cash and due from banks	77			86			71				79					59				73				51				58				55
	Money market investments	220			385			604				710					1,031				905				6				31				52
	Total securities	362			263			271				774					742				748				166				187				227
	Total loans	3,724			3,604			3,304				2,297					2,100				2,235				2,278				2,128				1,914
	Total deposits	3,931			3,874			3,731				3,590					3,604				3,546				2,178				2,164				2,004
	Shareholder’s equity:
	Preferred equity	120			180			305				50					140				260				70				70				70
	Common equity	418			399			350				317					298				273				246				224				200
	Noncontrolling interests	—			—			—				—					—				—				—				—				—
	Total shareholder’s equity	538			579			655				367					438				533				316				294				270
	(In millions)	TCBW											Other												Consolidated Company
		2013			2012			2011					2013				2012				2011				2013				2012				2011
	CONDENSED INCOME STATEMENT
	Net interest income	$	27.3		$	27.4		$	29.6		—		$	(155.8	)		$	(190.6	)		$	(266.2	)		$	1,696.30			$	1,731.90			$	1,756.20
	Provision for loan losses	(1.8		)	0.4			7.8			—		(0.4		)		0.5				—				(87.1		)		14.2				74.5
	Net interest income after provision for	29.1			27			21.8					(155.4		)		(191.1		)		(266.2		)		1,783.40				1,717.70				1,681.70
	loan losses
Net impairment losses on investment securities	—			—			—			—		(154.0		)		(100.3		)		(32.1		)		(165.1		)		(104.1		)		(33.7		)
Loss on sale of investment securities to Parent	(2.7		)	—			(4.8		)	—		2.7				9.2				77.6				—				—				—
Other noninterest income	4.1			3.8			3.5			—		(24.6		)		(23.7		)		(28.1		)		502.5				524				531.9
Noninterest expense	18.8			18.9			16.7			—		154.4				29.2				19.9				1,714.40				1,596.00				1,658.60
Income (loss) before income taxes	11.7			11.9			3.8			—		(485.7		)		(335.1		)		(268.7		)		406.4				541.6				521.3
Income tax expense (benefit)	4			4			1.1			—		(162.2		)		(120.7		)		(80.2		)		142.9				193.4				198.6
Net income (loss)	$	7.7		$	7.9		$	2.7		—		$	(323.5	)		$	(214.4	)		$	(188.5	)		$	263.5			$	348.2			$	322.7
YEAR-END BALANCE SHEET DATA
Total assets	$	943		$	961		$	874		—		$	740			$	1,286			$	642			$	56,031			$	55,512			$	53,149
Cash and due from banks	28			22			28					(17		)		8				—				1,175				1,842				1,224
Money market investments	181			251			143					(207		)		444				(91		)		8,457				8,754				7,123
Total securities	91			104			126					719				519				437				4,325				3,877				4,079
Total loans	630			571			562			—		64				63				69				39,043				37,665				37,258
Total deposits	793			791			693			—		(912		)		(64		)		(926		)		46,362				46,133				42,876
Shareholder’s equity:
Preferred equity	3			3			15			—		93				42				497				1,004				1,128				2,377
Common equity	87			82			75			—		(317		)		(645		)		(569		)		5,461				4,924				4,608
Noncontrolling interests	—			—			—			—		—				(3		)		(2		)		—				(3		)		(2		)
Total shareholder’s equity	90			85			90			—		(224		)		(606		)		(74		)		6,465				6,049				6,983

Quarterly_Financial_Informatio

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Financial Information	'
	23	QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
	Financial information by quarter for 2013 and 2012 is as follows:
			Quarters
	(In thousands, except per share amounts)		First			Second			Third			Fourth			Year
	2013:00:00
	Gross interest income		$	484,748		$	493,233		$	473,407		$	490,017		$	1,941,405
	Net interest income		418,115			430,657			415,521			432,035			1,696,328
	Provision for loan losses		(29,035		)	(21,990		)	(5,573		)	(30,538		)	(87,136		)
	Noninterest income:
	Net impairment losses on investment securities		(10,117		)	(4,217		)	(9,067		)	(141,733		)	(165,134		)
	Investment securities gains (losses), net		6,131			1,056			4,745			(6,310		)	5,622
	Other noninterest income		125,205			128,309			126,512			116,893			496,919
	Noninterest expense		397,348			451,678			370,663			494,750			1,714,439
	Income before income taxes (benefit)		171,021			126,117			172,621			(63,327		)	406,432
	Net income (loss)		110,387			83,026			111,514			(41,472		)	263,455
	Net income (loss) applicable to controlling interest		110,723			83,026			111,514			(41,472		)	263,791
	Preferred stock dividends		(22,399		)	(27,641		)	(27,507		)	(17,965		)	(95,512		)
	Preferred stock redemption		—			—			—			125,700			125,700
	Net earnings (loss) applicable to common shareholders		88,324			55,385			209,707			(59,437		)	293,979
	Net earnings (loss) per common share:
	Basic		$	0.48		$	0.3		$	1.13		$	(0.32	)	$	1.58
	Diluted		0.48			0.3			1.12			(0.32		)	1.58
	2012:00:00
	Gross interest income		$	518,877		$	512,588		$	509,000		$	498,257		$	2,038,722
	Net interest income		437,478			426,344			438,161			429,957			1,731,940
	Provision for loan losses		15,664			10,853			(1,889		)	(10,401		)	14,227
	Noninterest income:
	Net impairment losses on investment securities		(10,209		)	(7,308		)	(2,736		)	(83,808		)	(104,061		)
	Investment securities gains, net		9,865			5,626			5,729			9,577			30,797
	Other noninterest income		112,164			130,347			122,233			128,390			493,134
	Noninterest expense		392,372			401,656			394,975			407,014			1,596,017
	Income before income taxes		141,262			142,500			170,301			87,503			541,566
	Net income		89,403			91,464			109,597			57,686			348,150
	Net income applicable to controlling interest		89,676			91,737			109,851			58,252			349,516
	Preferred stock dividends		(64,187		)	(36,522		)	(47,529		)	(22,647		)	(170,885		)
	Net earnings applicable to common shareholders		25,489			55,215			62,322			35,605			178,631
	Net earnings per common share:
	Basic		$	0.14		$	0.3		$	0.34		$	0.19		$	0.97
	Diluted		0.14			0.3			0.34			0.19			0.97
	Certain amounts related primarily to gross and net interest income, and noninterest income, were changed from previously filed Form 10-Qs for the first, second and third quarters of 2012. The changes were due to reclassifications between interest and fees on loans, and other service charges, commissions and fees. See related discussion in Note 1.
	As discussed in Note 6, we made a significant 2013 fourth quarter adjustment recognizing OTTI for certain impairment losses on CDO investment securities.

Parent_Company_Financial_Infor

Parent Company Financial Information	12 Months Ended
	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]	'
Condensed Financial Information of Parent Company Only Disclosure [Text Block]	'
	24	PARENT COMPANY FINANCIAL INFORMATION
	CONDENSED BALANCE SHEETS
			December 31,
	(In thousands)		2013			2012
	ASSETS
	Cash and due from banks		$	902,697		$	2,001
	Interest-bearing deposits		72			75,808
	Security resell agreements		—			575,000
	Investment securities:
	Held-to-maturity, at adjusted cost (approximate fair value $31,422 and $22,112)		17,359			22,679
	Available-for-sale, at fair value		675,895			461,665
	Loans, net of allowance for loan losses of $0 and $23		—			1,277
	Other noninterest-bearing investments		37,154			50,799
	Investments in subsidiaries:
	Commercial banks and bank holding company		6,700,315			6,668,881
	Other operating companies		31,535			36,516
	Nonoperating – ZMFU II, Inc.1		44,511			43,012
	Other assets		278,392			311,093
			$	8,687,930		$	8,248,731
	LIABILITIES AND SHAREHOLDERS’ EQUITY
	Other liabilities		$	200,729		$	106,159
	Short-term borrowings:
	Due to others		—			4,951
	Subordinated debt to affiliated trusts		15,464			309,278
	Long-term debt:
	Due to affiliates		17			—
	Due to others		2,007,157			1,776,274
	Total liabilities		2,223,367			2,196,662
	Shareholders’ equity:
	Preferred stock		1,003,970			1,128,302
	Common stock		4,179,024			4,166,109
	Retained earnings		1,473,670			1,203,815
	Accumulated other comprehensive loss		(192,101		)	(446,157		)
	Total shareholders’ equity		6,464,563			6,052,069
			$	8,687,930		$	8,248,731
	1	ZMFU II, Inc. is a wholly-owned nonoperating subsidiary whose sole purpose is to hold a portfolio of municipal bonds, loans and leases.
	CONDENSED STATEMENTS OF INCOME
			Year Ended December 31,
	(In thousands)		2013			2012			2011
	Interest income:
	Commercial bank subsidiaries		$	757		$	836		$	2,519
	Other subsidiaries and affiliates		105			386			63
	Loans and securities		17,764			18,993			13,640
	Total interest income		18,626			20,215			16,222
	Interest expense:
	Affiliated trusts		8,483			24,053			24,027
	Other borrowed funds		171,304			195,195			274,843
	Total interest expense		179,787			219,248			298,870
	Net interest loss		(161,161		)	(199,033		)	(282,648		)
	Provision for loan losses		(23		)	(10		)	(38		)
	Net interest loss after provision for loan losses		(161,138		)	(199,023		)	(282,610		)
	Other income:
	Dividends from consolidated subsidiaries:
	Commercial banks and bank holding company		421,406			246,606			71,350
	Other operating companies		200			5,440			14,151
	Nonoperating – ZMFU II, Inc.		—			50,000			—
	Equity and fixed income securities gains (losses), net		(7,332		)	86			426
	Net impairment losses on investment securities		(95,637		)	(74,153		)	(26,810		)
	Other income (loss)		(8,397		)	(6,562		)	4,203
			310,240			221,417			63,320
	Expenses:
	Salaries and employee benefits		26,014			20,507			19,033
	Debt extinguishment cost		120,192			—			—
Other operating expenses		1,436			395			4,176
		147,642			20,902			23,209
Income (loss) before income taxes and undistributed		1,460			1,492			(242,499		)
income/loss of consolidated subsidiaries
Income tax benefit		(133,798		)	(108,541		)	(104,395		)
Income (loss) before equity in undistributed income/loss of consolidated subsidiaries		135,258			110,033			(138,104		)
Equity in undistributed income (loss) of consolidated subsidiaries:
Commercial banks and bank holding company		132,906			304,559			488,806
Other operating companies		(4,887		)	(15,561		)	(27,687		)
Nonoperating – ZMFU II, Inc.		514			(49,515		)	789
Net income		263,791			349,516			323,804
Preferred stock dividends		(95,512		)	(170,885		)	(170,414		)
Preferred stock redemption		125,700			—			—
Net earnings loss applicable to common shareholders		$	293,979		$	178,631		$	153,390
CONDENSED STATEMENTS OF CASH FLOWS
		Year Ended December 31,
(In thousands)		2013			2012			2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$	263,791		$	349,516		$	323,804
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Undistributed net income of consolidated subsidiaries		(128,533		)	(239,483		)	(461,908		)
Net impairment losses on investment securities		95,637			74,153			26,810
Debt Extinguishment cost		120,192			—			—
Other, net		69,098			4,376			27,505
Net cash provided by (used in) operating activities		420,185			188,562			(83,789		)
CASH FLOWS FROM INVESTING ACTIVITIES
Net decrease (increase) in money market investments		650,736			305,668			(408,811		)
Collection of advances to subsidiaries		10,000			23,190			6,425
Advances to subsidiaries		(10,000		)	(23,000		)	(6,250		)
Proceeds from sales and maturities of investment securities		27,916			5,433			1,259,262
Purchases of investment securities		(4,858		)	(3,980		)	(575,887		)
Decrease of investment in subsidiaries		175,000			764,290			113,834
Other, net		10,642			3,814			9,642
Net cash provided by investing activities		859,436			1,075,415			398,215
CASH FLOWS FROM FINANCING ACTIVITIES
Net change in short-term funds borrowed		(3,368		)	(110,995		)	(165,500		)
Proceeds from issuance of long-term debt		646,408			757,610			101,821
Repayments of long-term debt		(835,031		)	(372,312		)	(117,975		)
Debt extinguishment cost paid		(45,812		)	—			—
Proceeds from issuance of preferred stock		784,318			141,342			—
Proceeds from issuance of common stock		9,825			1,898			25,686
Cash paid for preferred stock redemptions		(799,468		)	(1,542,500		)	—
Dividends paid on preferred stock		(95,512		)	(126,189		)	(148,774		)
Dividends paid on common stock		(24,148		)	(7,392		)	(7,361		)
Other, net		(16,137		)	(3,449		)	(4,160		)
Net cash used in financing activities		(378,925		)	(1,261,987		)	(316,263		)
Net increase (decrease) in cash and due from banks		900,696			1,990			(1,837		)
Cash and due from banks at beginning of year		2,001			11			1,848
Cash and due from banks at end of year		$	902,697		$	2,001		$	11
The Parent paid interest of $125.9 million in 2013, $124.1 million in 2012, and $126.7 million in 2011.

Summary_Of_Significant_Account1

Summary Of Significant Accounting Policies (Policy)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Business	'
	Business
	Zions Bancorporation (“the Parent”) is a financial holding company headquartered in Salt Lake City, Utah, which provides a full range of banking and related services through its subsidiary banks in ten Western and Southwestern states as follows: Zions First National Bank (“Zions Bank”), in Utah and Idaho; California Bank & Trust (“CB&T”); Amegy Corporation (“Amegy”) and its subsidiary, Amegy Bank, in Texas; National Bank of Arizona (“NBAZ”); Nevada State Bank (“NSB”); Vectra Bank Colorado (“Vectra”), in Colorado and New Mexico; The Commerce Bank of Washington (“TCBW”); and The Commerce Bank of Oregon (“TCBO”). The Parent and its subsidiary banks also own and operate certain nonbank subsidiaries that engage in financial services.
Basis Of Financial Statement Presentation	'
	Basis of Financial Statement Presentation
	The consolidated financial statements include the accounts of the Parent and its majority-owned subsidiaries (“the Company,” “we,” “our,” “us”). Unconsolidated investments in which there is a greater than 20% ownership are accounted for by the equity method of accounting; those in which there is less than 20% ownership are accounted for under cost, fair value, or equity methods of accounting. All significant intercompany accounts and transactions have been eliminated in consolidation.
	The consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and prevailing practices within the financial services industry. References to GAAP as promulgated by the Financial Accounting Standards Board (“FASB”) are made according to sections of the Accounting Standards Codification (“ASC”) and to Accounting Standards Updates (“ASU”).
	In preparing the consolidated financial statements, we are required to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Reclassification Policy	'
	Reclassifications
	Certain amounts in 2011 have been reclassified to conform with the current year presentation. Certain credit card interchange fees were reclassified from interest and fees on loans to other service charges, commissions and fees. Income from factored receivables was reclassified from other service charges, commissions and fees to interest and fees on loans. The net effect decreased interest and fees on loans by $16.3 million in 2011 and increased other service charges, commissions and fees by the same amount. There was no effect on the balance sheet. The changes were made primarily to conform with prevailing reporting practices in the banking industry. Affected balances for 2011 in this Form 10-K have been adjusted where appropriate. There was no change in 2011 net earnings.
Variable Interest Entities	'
	Variable Interest Entities
	A variable interest entity (“VIE”) is consolidated when a company is the primary beneficiary of the VIE. Current accounting guidance requires continuous analysis on a qualitative rather than a quantitative basis to determine the primary beneficiary of a VIE. At the commencement of our involvement and periodically thereafter, we consider our consolidation conclusions for all entities with which we are involved. As of December 31, 2013, no VIEs have been consolidated in the Company’s financial statements.
Statement Of Cash Flows	'
	Statement of Cash Flows
	For purposes of presentation in the consolidated statements of cash flows, “cash and cash equivalents” are defined as those amounts included in cash and due from banks in the consolidated balance sheets.
Security Resell Agreements	'
	Security Resell Agreements
	Security resell agreements represent overnight and term agreements with the majority maturing within 30 days. These agreements are generally treated as collateralized financing transactions and are carried at amounts at which the securities were acquired plus accrued interest. Either the Company, or in some instances third parties on its behalf, take possession of the underlying securities. The fair value of such securities is monitored throughout the contract term to ensure that asset values remain sufficient to protect against counterparty default. We are permitted by contract to sell or repledge certain securities that we accept as collateral for security resell agreements. If sold, our obligation to return the collateral is recorded as a liability and included in the balance sheet as securities sold, not yet purchased. At December 31, 2013, we did not hold any securities for which we were permitted by contract to sell or repledge. Security resell agreements averaged approximately $675 million during 2013, and the maximum amount outstanding at any month-end during 2013 was approximately $2.3 billion.
Investment Securities	'
	Investment Securities
	We classify our investment securities according to their purpose and holding period. Gains or losses on the sale of securities are recognized using the specific identification method and recorded in noninterest income.
	Held-to-maturity (“HTM”) debt securities are stated at adjusted cost, net of unamortized premiums and unaccreted discounts. The Company has the intent and ability to hold such securities until recovery of their amortized cost basis. However, see further discussion in Note 6 regarding the Company’s change in intent prior to December 31, 2013 for certain CDO securities.
	Available-for-sale (“AFS”) securities are stated at fair value and generally consist of debt securities held for investment and marketable equity securities not accounted for under the equity method. Unrealized gains and losses of AFS securities, after applicable taxes, are recorded as a component of other comprehensive income (“OCI”).
	We review quarterly our investment securities portfolio for any declines in value that are considered to be other-than-temporary impairment (“OTTI”). The process, methodology and factors considered to evaluate securities for OTTI are discussed further in Note 6. Noncredit-related OTTI on securities we intend to sell and credit-related OTTI regardless of intent is recognized in earnings. OTTI is recognized as a realized loss through earnings when our best estimate of discounted cash flows expected to be collected is less than our amortized cost basis. Noncredit-related OTTI on securities not expected to be sold is recognized in OCI.
	Trading securities are stated at fair value and consist of securities acquired for short-term appreciation or other trading purposes. Realized and unrealized gains and losses are recorded in trading income, which is included in capital markets and foreign exchange.
	The fair values of investment securities, as estimated under current accounting guidance, are discussed in Notes 8 and 21.
Loans And Allowance For Credit Losses	'
	Loans and Allowance for Credit Losses
	Loans are reported at the principal amount outstanding, net of unearned income. Unearned income, which includes deferred fees net of deferred direct loan origination costs, is amortized to interest income over the life of the loan using the interest method. Interest income is recognized on an accrual basis.
	At the time of origination, we determine whether loans will be held for investment or held for sale. We may subsequently change our intent to hold loans for investment and reclassify them as held for sale. Loans held for sale are carried at the lower of aggregate cost or fair value. A valuation allowance is recorded when cost exceeds fair value based on reviews at the time of reclassification and periodically thereafter. Gains and losses are recorded in noninterest income based on the difference between sales proceeds and carrying value.
	Loans that become other than current with respect to contractual payments due may be accounted for separately depending on the status of the loan, which is determined from certain credit quality indicators and analysis under the circumstances. The loan status includes past due, nonaccrual, impaired, modified, and restructured (including troubled debt restructurings). Our accounting policies for these loan types and our estimation of the related allowance for loan losses are discussed further in Note 7.
	Certain purchased loans require separate accounting procedures that are also discussed in Note 7.
	The allowance for credit losses includes the allowance for loan losses and the reserve for unfunded lending commitments, and represents our estimate of losses inherent in the loan portfolio that may be recognized from loans and lending commitments that are not recoverable. Further discussion of our estimation process for the allowance for credit losses is included in Note 7.
Other Real Estate Owned	'
	Other Real Estate Owned
	Other real estate owned (“OREO”) consists principally of commercial and residential real estate obtained in partial or total satisfaction of loan obligations. Amounts are recorded at the lower of cost or fair value (less any selling costs) based on property appraisals at the time of transfer and periodically thereafter.
Nonmarketable Securities	'
	Nonmarketable Investments
	Nonmarketable investments, including private equity investments, are included in other noninterest-bearing investments on the balance sheet. These investments include venture capital securities and securities acquired for various debt and regulatory requirements. See further discussion in Note 21.
	Certain nonmarketable venture capital securities are accounted for under the equity method and reported at estimated fair values in the absence of readily ascertainable fair values. Changes in fair value and gains and losses from sales are recognized in noninterest income. The values assigned to the securities where no market quotations exist are based upon available information and may not necessarily represent amounts that will ultimately be realized. Such estimated amounts depend on future circumstances and will not be realized until the individual securities are liquidated.
	Other nonmarketable investments, including private equity investments and those acquired for various debt and regulatory requirements, are accounted for at cost. Periodic reviews are conducted for impairment by comparing carrying values with estimates of fair value determined according to the previous discussion.
Premises And Equipment	'
	Premises and Equipment
	Premises and equipment are stated at cost, net of accumulated depreciation and amortization. Depreciation, computed primarily on the straight-line method, is charged to operations over the estimated useful lives of the properties, generally 25 to 40 years for buildings, 3 to 10 years for furniture and equipment, 3 to 5 years for software, and 10 years for software capitalized for the Company’s new lending and deposit systems. Leasehold improvements are amortized over the terms of the respective leases or the estimated useful lives of the improvements, whichever is shorter.
Business Combinations	'
	Business Combinations
	Business combinations are accounted for under the purchase method of accounting. Upon initially obtaining control, we recognize 100% of all acquired assets and all assumed liabilities regardless of the percentage owned. The assets and liabilities are recorded at their estimated fair values, with goodwill being recorded when such fair values are less than the cost of acquisition. Certain transaction and restructuring costs are expensed as incurred. Changes to estimated fair values from a business combination are recognized as an adjustment to goodwill over the measurement period, which cannot exceed one year from the acquisition date. Results of operations of the acquired business are included in our statement of income from the date of acquisition.
Goodwill And Identifiable Intangible Assets	'
	Goodwill and Identifiable Intangible Assets
	Goodwill and intangible assets deemed to have indefinite lives are not amortized. We subject these assets to annual specified impairment tests as of the beginning of the fourth quarter and more frequently if changing conditions warrant. Core deposit assets and other intangibles with finite useful lives are generally amortized on an accelerated basis using an estimated useful life of up to 12 years.
Derivative Instruments	'
	Derivative Instruments
	We use derivative instruments, including interest rate swaps and floors and basis swaps, as part of our overall interest rate risk management strategy. These instruments enable us to manage to desired asset and liability duration and to reduce interest rate exposure by matching estimated repricing periods of interest-sensitive assets and liabilities. We also execute derivative instruments with commercial banking customers to facilitate their risk management strategies. These derivatives are immediately hedged by offsetting derivatives such that we minimize our net risk exposure as a result of such transactions. We record all derivatives at fair value in the balance sheet as either other assets or other liabilities. See further discussion in Note 8.
Commitments And Letters Of Credit	'
	Commitments and Letters of Credit
	In the ordinary course of business, we enter into commitments to extend credit, commercial letters of credit, and standby letters of credit. Such financial instruments are recorded in the financial statements when they become payable. The credit risk associated with these commitments is evaluated in a manner similar to the allowance for loan losses. The reserve for unfunded lending commitments is presented separately in the balance sheet.
Share-Based Compensation	'
	Share-Based Compensation
	Share-based compensation generally includes grants of stock options, restricted stock, and other awards to employees and nonemployee directors. We recognize the share-based awards in the statement of income based on their fair values. See further discussion in Note 17.
Income Taxes	'
	Income Taxes
	Deferred tax assets and liabilities are determined based on temporary differences between financial statement asset and liability amounts and their respective tax bases and are measured using enacted tax laws and rates. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in income in the period that includes the enactment date. Deferred tax assets are recognized subject to management’s judgment that realization is more-likely-than-not. Unrecognized tax benefits for uncertain tax positions relate primarily to state tax contingencies. See further discussion in Note 15.
Net Earnings Per Common Share	'
	Net Earnings Per Common Share
	Net earnings per common share is based on net earnings applicable to common shareholders, which is net of preferred stock dividends. Basic net earnings per common share is based on the weighted average outstanding common shares during each year. Unvested share-based awards with rights to receive nonforfeitable dividends are considered participating securities and included in the computation of basic earnings per share. Diluted net earnings per common share is based on the weighted average outstanding common shares during each year, including common stock equivalents (such as warrants, stock options and restricted stock). Diluted net earnings per common share excludes common stock equivalents whose effect is antidilutive. See further discussion in Note 16.

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]	'
Schedule Of Noncash Activities	'
	Noncash activities are summarized as follows:
	(In thousands)	Year Ended December 31,
		2013		2012		2011
	Loans transferred to other real estate owned	$	60,749	$	172,018	$	301,454
	Loans and leases transferred to loans held for sale	36,301		—		31,936
	Beneficial conversion feature transferred from common stock to preferred stock as a result of subordinated debt conversions	206		15,232		43,139
	Subordinated debt converted to preferred stock	1,210		89,564		256,109
	Preferred stock transferred to common stock as a result of the Series C preferred stock redemption	580		—		—
	Preferred stock/beneficial conversion feature transferred to retained earnings as result of the Series C preferred stock redemption	125,700		—		—
	Amortized cost of HTM securities transferred to AFS securities	181,915		—		—

Investment_Securities_Tables

Investment Securities (Tables)	12 Months Ended
	Dec. 31, 2013
Investments [Abstract]	'
Summary Of Investment Securities	'
		December 31, 2013
					Recognized in OCI 1											Not recognized in OCI
	(In thousands)	Amortized			Gross				Gross			Carrying				Gross			Gross				Estimated
		cost			unrealized				unrealized			value				unrealized			unrealized				fair
					gains				losses							gains			losses				value
	Held-to-maturity
	Municipal securities	$	551,055		$	—			$	—		$	551,055			$	11,295		$	4,616			$	557,734
	Asset-backed securities:
	Trust preferred securities – banks and insurance	79,419			—				41,593			37,826				15,195			1,308				51,713
	Other	—			—				—			—				—			—				—
	Other debt securities	100			—				—			100				—			—				100
		630,574			—				41,593			588,981				26,490			5,924				609,547
	Available-for-sale
	U.S. Treasury securities	1,442			104				—			1,546											1,546
	U.S. Government agencies and corporations:
	Agency securities	517,905			1,920				901			518,924											518,924
	Agency guaranteed mortgage-backed securities	308,687			9,926				1,237			317,376											317,376
	Small Business Administration loan-backed securities	1,202,901			21,129				2,771			1,221,259											1,221,259
	Municipal securities	65,425			1,329				490			66,264											66,264
	Asset-backed securities:
	Trust preferred securities – banks and insurance	1,508,224			13,439				282,843			1,238,820											1,238,820
	Trust preferred securities – real estate investment trusts	22,996			—				—			22,996											22,996
	Auction rate securities	6,507			118				26			6,599											6,599
	Other	27,540			359				—			27,899											27,899
		3,661,627			48,324				288,268			3,421,683											3,421,683
	Mutual funds and other	287,603			21				7,421			280,203											280,203
		3,949,230			48,345				295,689			3,701,886											3,701,886
	Total	$	4,579,804		$	48,345			$	337,282		$	4,290,867										$	4,311,433
		December 31, 2012
					Recognized in OCI 1											Not recognized in OCI
	(In thousands)	Amortized			Gross				Gross			Carrying				Gross			Gross				Estimated
		cost			unrealized				unrealized			value				unrealized			unrealized				fair
					gains				losses							gains			losses				value
	Held-to-maturity
	Municipal securities	$	524,738		$	—			$	—		$	524,738			$	12,837		$	709			$	536,866
	Asset-backed securities:
	Trust preferred securities – banks and insurance	255,647			—				42,964			212,683				114			86,596				126,201
	Other	21,858			—				2,470			19,388				709			8,523				11,574
	Other debt securities	100			—				—			100				—			—				100
		802,343			—				45,434			756,909				13,660			95,828				674,741
	Available-for-sale
	U.S. Treasury securities	104,313			211				—			104,524											104,524
	U.S. Government agencies and corporations:
	Agency securities	108,814			3,959				116			112,657											112,657
	Agency guaranteed mortgage-backed securities	406,928			18,598				16			425,510											425,510
	Small Business Administration loan-backed securities	1,124,322			29,245				639			1,152,928											1,152,928
	Municipal securities	75,344			2,622				1,970			75,996											75,996
	Asset-backed securities:
	Trust preferred securities – banks and insurance	1,596,156			16,687				663,451			949,392											949,392
	Trust preferred securities – real estate investment trusts	40,485			—				24,082			16,403											16,403
	Auction rate securities	6,504			79				68			6,515											6,515
	Other	25,614			701				6,941			19,374											19,374
		3,488,480			72,102				697,283			2,863,299											2,863,299
	Mutual funds and other	228,469			194				652			228,011											228,011
		3,716,949			72,296				697,935			3,091,310											3,091,310
	Total	$	4,519,292		$	72,296			$	743,369		$	3,848,219										$	3,766,051
	1	The gross unrealized losses recognized in OCI on HTM securities resulted from a previous transfer of AFS securities
	to HTM
Contractual Maturities Debt Securities	'
		Held-to-maturity							Available-for-sale
	(In thousands)	Amortized			Estimated				Amortized			Estimated
		cost			fair				cost			fair
					value							value
	Due in one year or less	$	53,489		$	53,200			$	446,742		$	434,528
	Due after one year through five years	197,830			202,553				1,151,262			1,126,669
	Due after five years through ten years	136,754			134,360				724,261			702,395
	Due after ten years	242,501			219,434				1,339,362			1,158,091
		$	630,574		$	609,547			$	3,661,627		$	3,421,683
Summary Of Amount Of Gross Unrealized Losses For Debt Securities And Estimated Fair Value	'
	The following is a summary of the amount of gross unrealized losses for debt securities and the estimated fair value by length of time the securities have been in an unrealized loss position:
		December 31, 2013
		Less than 12 months							12 months or more							Total
	(In thousands)	Gross			Estimated				Gross			Estimated				Gross			Estimated
		unrealized			fair				unrealized			fair				unrealized			fair
		losses			value				losses			value				losses			value
	Held-to-maturity
	Municipal securities	$	4,025		$	70,400			$	591		$	9,103			$	4,616		$	79,503
	Asset-backed securities:
	Trust preferred securities – banks and insurance	—			—				42,901			51,319				42,901			51,319
	Other	—			—				—			—				—			—
		4,025			70,400				43,492			60,422				47,517			130,822
	Available-for-sale
	U.S. Government agencies and corporations:
	Agency securities	828			47,862				73			5,874				901			53,736
	Agency guaranteed mortgage-backed securities	1,231			64,533				6			935				1,237			65,468
	Small Business Administration loan-backed securities	1,709			187,680				1,062			39,256				2,771			226,936
	Municipal securities	73			8,834				417			3,179				490			12,013
	Asset-backed securities:
	Trust preferred securities – banks and insurance	2,539			51,911				280,304			847,990				282,843			899,901
	Trust preferred securities – real estate investment trusts	—			—				—			—				—			—
	Auction rate securities	5			1,609				21			892				26			2,501
	Other	—			—				—			—				—			—
		6,385			362,429				281,883			898,126				288,268			1,260,555
	Mutual funds and other	943			24,057				6,478			103,614				7,421			127,671
		7,328			386,486				288,361			1,001,740				295,689			1,388,226
	Total	$	11,353		$	456,886			$	331,853		$	1,062,162			$	343,206		$	1,519,048
			December 31, 2012
			Less than 12 months							12 months or more							Total
		(In thousands)	Gross unrealized losses			Estimated fair				Gross unrealized losses			Estimated fair				Gross unrealized losses			Estimated fair
						value							value							value
		Held-to-maturity
		Municipal securities	$	630		$	42,613			$	79		$	5,910			$	709		$	48,523
		Asset-backed securities:
		Trust preferred securities – banks and insurance	—			—				129,560			126,019				129,560			126,019
		Other	—			—				10,993			10,904				10,993			10,904
		Other debt securities	—			—				—			—				—			—
			630			42,613				140,632			142,833				141,262			185,446
		Available-for-sale
		U.S. Government agencies and corporations:
		Agency securities	35			18,633				81			6,916				116			25,549
		Agency guaranteed mortgage-backed securities	10			6,032				6			629				16			6,661
		Small Business Administration loan-backed securities	91			15,199				548			69,011				639			84,210
		Municipal securities	61			4,898				1,909			11,768				1,970			16,666
		Asset-backed securities:
		Trust preferred securities – banks and insurance	—			—				663,451			765,421				663,451			765,421
		Trust preferred securities – real estate investment trusts	—			—				24,082			16,403				24,082			16,403
		Auction rate securities	—			—				68			2,459				68			2,459
		Other	—			—				6,941			15,234				6,941			15,234
			197			44,762				697,086			887,841				697,283			932,603
		Mutual funds and other	652			112,324				—			—				652			112,324
			849			157,086				697,086			887,841				697,935			1,044,927
		Total	$	1,479		$	199,699			$	837,718		$	1,030,674			$	839,197		$	1,230,373
Rollforward Of Total Amount Of Credit-Related OTTI	'
	The following is a tabular rollforward of the total amount of credit-related OTTI, including amounts recognized in earnings:
	(In thousands)	2013										2012
		HTM			AFS				Total			HTM				AFS			Total
	Balance of credit-related OTTI at beginning of year	$	(13,549	)	$	(394,494	)		$	(408,043	)	$	(6,126	)		$	(314,860	)	$	(320,986	)
	Additions recognized in earnings during the year:
	Credit-related OTTI not previously recognized 1	(403		)	(168		)		(571		)	(2,890		)		(5,654		)	(8,544		)
	Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis 2	—			(27,482		)		(27,482		)	(4,533		)		(90,984		)	(95,517		)
	Subtotal of amounts recognized in earnings	(403		)	(27,650		)		(28,053		)	(7,423		)		(96,638		)	(104,061		)
	Transfers from HTM to AFS	4,900			(4,900		)		—			—				—			—
	Reductions for securities sold or paid off	—			47,768				47,768			—				17,004			17,004
	during the year
	Reductions for securities the Company intends to sell or will be required to sell before recovery of its amortized cost basis	—			202,443				202,443			—				—			—
	Balance of credit-related OTTI at end of year	$	(9,052	)	$	(176,833	)		$	(185,885	)	$	(13,549	)		$	(394,494	)	$	(408,043	)
Noncredit Related OTTI	'
	(In thousands)	2013			2012				2011
	HTM	$	16,114		$	16,718			$	20,945
	AFS	7,358			45,478				22,697
		$	23,472		$	62,196			$	43,642
Gains And Losses, Including OTTI, Recognized In Statement Of Income	'
	The following summarizes gains and losses, including OTTI, that were recognized in the statement of income:
			2013							2012							2011
		(In thousands)	Gross			Gross				Gross			Gross				Gross			Gross losses
			gains			losses				gains			losses				gains
		Investment securities:
		Held-to-maturity	$	81		$	403			$	214		$	7,423			$	229		$	769
		Available-for-sale	13,881			181,591				25,120			102,428				21,793			43,068
		Other noninterest-bearing investments:
		Nonmarketable equity securities	10,182			1,662				23,218			11,965				9,449			2,938
			24,144			183,656				48,552			121,816				31,471			46,775
		Net losses				$	(159,512	)					$	(73,264	)					$	(15,304	)
		Statement of income information:
		Net impairment losses on investment securities				$	(165,134	)					$	(104,061	)					$	(33,683	)
		Equity securities gains, net				8,520							11,253							6,511
		Fixed income securities gains (losses), net				(2,898		)					19,544							11,868
		Net losses				$	(159,512	)					$	(73,264	)					$	(15,304	)

Loans_And_Allowance_For_Credit1

Loans And Allowance For Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2013
Loans And Allowance For Credit Losses [Abstract]	'
Summary Of Major Portfolio Segment And Specific Loan Class	'
		December 31,
	(In thousands)	2013				2012
	Loans held for sale	$	171,328			$	251,651
	Commercial:
	Commercial and industrial	$	12,481,083			$	11,256,945
	Leasing	387,929				422,513
	Owner occupied	7,437,195				7,589,082
	Municipal	449,418				494,183
	Total commercial	20,755,625				19,762,723
	Commercial real estate:
	Construction and land development	2,182,821				1,939,413
	Term	8,005,837				8,062,819
	Total commercial real estate	10,188,658				10,002,232
	Consumer:
	Home equity credit line	2,133,120				2,177,680
	1-4 family residential	4,736,665				4,350,329
	Construction and other consumer real estate	324,922				321,235
	Bankcard and other revolving plans	356,240				306,428
	Other	197,864				216,379
	Total consumer	7,748,811				7,372,051
	FDIC-supported loans	350,271				528,241
	Total loans	$	39,043,365			$	37,665,247
Summary Of Changes in The Allowance For Credit Losses	'
		31-Dec-13
	(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
						real estate							supported 1
	Allowance for loan losses
	Balance at beginning of year	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
	Additions:
	Provision for loan losses	(5,640		)		(63,544		)		(19,100		)	1,148			(87,136		)
	Adjustment for FDIC-supported loans	—				—				—			(11,237		)	(11,237		)
	Deductions:
	Gross loan and lease charge-offs	(75,434		)		(24,609		)		(28,960		)	(1,794		)	(130,797		)
	Recoveries	35,311				24,540				13,269			6,254			79,374
	Net loan and lease charge-offs	(40,123		)		(69		)		(15,691		)	4,460			(51,423		)
	Balance at end of year	$	465,145			$	213,363			$	60,865		$	6,918		$	746,291
	Reserve for unfunded lending commitments
	Balance at beginning of year	$	67,374			$	37,852			$	1,583		$	—		$	106,809
	Provision charged (credited) to earnings	(19,029		)		(367		)		2,292			—			(17,104		)
	Balance at end of year	$	48,345			$	37,485			$	3,875		$	—		$	89,705
	Total allowance for credit losses
	Allowance for loan losses	$	465,145			$	213,363			$	60,865		$	6,918		$	746,291
	Reserve for unfunded lending commitments	48,345				37,485				3,875			—			89,705
	Total allowance for credit losses	$	513,490			$	250,848			$	64,740		$	6,918		$	835,996
		31-Dec-12
	(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
						real estate							supported 1
	Allowance for loan losses
	Balance at beginning of year	$	561,351			$	343,747			$	123,115		$	23,472		$	1,051,685
	Additions:
	Provision for loan losses	16,808				(18,982		)		18,389			(1,988		)	14,227
	Adjustment for FDIC-supported loans	—				—				—			(14,542		)	(14,542		)
	Deductions:
	Gross loan and lease charge-offs	(117,506		)		(82,944		)		(60,273		)	(6,466		)	(267,189		)
	Recoveries	50,255				35,155				14,425			12,071			111,906
	Net loan and lease charge-offs	(67,251		)		(47,789		)		(45,848		)	5,605			(155,283		)
	Balance at end of year	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
	Reserve for unfunded lending commitments
	Balance at beginning of year	$	77,232			$	23,572			$	1,618		$	—		$	102,422
	Provision charged (credited) to earnings	(9,858		)		14,280				(35		)	—			4,387
	Balance at end of year	$	67,374			$	37,852			$	1,583		$	—		$	106,809
	Total allowance for credit losses
	Allowance for loan losses	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
	Reserve for unfunded lending commitments	67,374				37,852				1,583			—			106,809
	Total allowance for credit losses	$	578,282			$	314,828			$	97,239		$	12,547		$	1,002,896
	1 The Purchased Loans section following contains further discussion related to FDIC-supported loans.
Summary Of ALLL And Outstanding Loan Balances According To The Company's Impairment Method	'
	The ALLL and outstanding loan balances according to the Company’s impairment method are summarized as follows:
		December 31, 2013
	(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
						real estate							supported
	Allowance for loan losses
	Individually evaluated for impairment	$	39,288			$	12,510			$	10,701		$	—		$	62,499
	Collectively evaluated for impairment	425,857				200,853				50,164			392			677,266
	Purchased loans with evidence of credit deterioration	—				—				—			6,526			6,526
	Total	$	465,145			$	213,363			$	60,865		$	6,918		$	746,291
	Outstanding loan balances
	Individually evaluated for impairment	$	315,604			$	262,907			$	101,545		$	1,224		$	681,280
	Collectively evaluated for impairment	20,440,021				9,925,751				7,647,266			37,963			38,051,001
	Purchased loans with evidence of credit deterioration	—				—				—			311,084			311,084
	Total	$	20,755,625			$	10,188,658			$	7,748,811		$	350,271		$	39,043,365
		December 31, 2012
	(In thousands)	Commercial				Commercial				Consumer			FDIC-			Total
						real estate							supported
	Allowance for loan losses
	Individually evaluated for impairment	$	30,587			$	22,295			$	13,758		$	—		$	66,640
	Collectively evaluated for impairment	480,321				254,681				81,898			422			817,322
	Purchased loans with evidence of credit deterioration	—				—				—			12,125			12,125
	Total	$	510,908			$	276,976			$	95,656		$	12,547		$	896,087
	Outstanding loan balances
	Individually evaluated for impairment	$	353,380			$	437,647			$	112,320		$	1,149		$	904,496
	Collectively evaluated for impairment	19,409,343				9,564,585				7,259,731			57,896			36,291,555
	Purchased loans with evidence of credit deterioration	—				—				—			469,196			469,196
	Total	$	19,762,723			$	10,002,232			$	7,372,051		$	528,241		$	37,665,247
Summary Of Nonaccrual Loans	'
	Nonaccrual loans are summarized as follows:
		December 31,
	(In thousands)	2013				2012
	Commercial:
	Commercial and industrial	$	97,960			$	90,859
	Leasing	757				838
	Owner occupied	136,281				206,031
	Municipal	9,986				9,234
	Total commercial	244,984				306,962
	Commercial real estate:
	Construction and land development	29,205				107,658
	Term	60,380				124,615
	Total commercial real estate	89,585				232,273
	Consumer:
	Home equity credit line	8,969				14,247
	1-4 family residential	53,002				70,180
	Construction and other consumer real estate	3,510				4,560
	Bankcard and other revolving plans	1,365				1,190
	Other	804				1,398
	Total consumer loans	67,650				91,575
	FDIC-supported loans	4,394				17,343
	Total	$	406,613			$	648,153
Summary Of Past Due Loans (Accruing And Nonaccruing)	'
	Past due loans (accruing and nonaccruing) are summarized as follows:
		December 31, 2013
	(In thousands)	Current				30-89 days				90+ days			Total			Total			Accruing			Nonaccrual
						past due				past due			past due			loans			loans			loans
																			90+ days			that are
																			past due			current1
	Commercial:
	Commercial and industrial	$	12,387,546			$	48,811			$	44,726		$	93,537		$	12,481,083		$	1,855		$	52,412
	Leasing	387,526				173				230			403			387,929			36			563
	Owner occupied	7,357,618				36,718				42,859			79,577			7,437,195			744			82,072
	Municipal	440,608				3,307				5,503			8,810			449,418			—			1,176
	Total commercial	20,573,298				89,009				93,318			182,327			20,755,625			2,635			136,223
	Commercial real estate:
	Construction and land development	2,162,018				8,967				11,836			20,803			2,182,821			23			17,311
	Term	7,971,327				15,362				19,148			34,510			8,005,837			5,580			42,624
	Total commercial real estate	10,133,345				24,329				30,984			55,313			10,188,658			5,603			59,935
	Consumer:
	Home equity credit line	2,122,549				8,001				2,570			10,571			2,133,120			98			2,868
	1-4 family residential	4,704,852				8,526				23,287			31,813			4,736,665			667			27,592
	Construction and other consumer real estate	322,807				1,038				1,077			2,115			324,922			—			2,232
	Bankcard and other revolving plans	353,060				2,093				1,087			3,180			356,240			900			1,105
	Other	196,327				827				710			1,537			197,864			54			125
	Total consumer loans	7,699,595				20,485				28,731			49,216			7,748,811			1,719			33,922
	FDIC-supported loans	305,709				12,026				32,536			44,562			350,271			30,391			1,975
	Total	$	38,711,947			$	145,849			$	185,569		$	331,418		$	39,043,365		$	40,348		$	232,055
		December 31, 2012
	(In thousands)	Current				30-89 days				90+ days			Total			Total			Accruing			Nonaccrual
						past due				past due			past due			loans			loans			loans
																			90+ days			that are
																			past due			current1
	Commercial:
	Commercial and industrial	$	11,124,639			$	73,555			$	58,751		$	132,306		$	11,256,945		$	4,013		$	32,389
	Leasing	421,590				115				808			923			422,513			—			—
	Owner occupied	7,447,083				56,504				85,495			141,999			7,589,082			1,822			100,835
	Municipal	494,183				—				—			—			494,183			—			9,234
	Total commercial	19,487,495				130,174				145,054			275,228			19,762,723			5,835			142,458
	Commercial real estate:
	Construction and land development	1,836,284				66,139				36,990			103,129			1,939,413			853			50,044
	Term	7,984,819				24,730				53,270			78,000			8,062,819			107			54,546
	Total commercial real estate	9,821,103				90,869				90,260			181,129			10,002,232			960			104,590
	Consumer:
	Home equity credit line	2,169,722				4,036				3,922			7,958			2,177,680			—			8,846
	1-4 family residential	4,282,611				24,060				43,658			67,718			4,350,329			1,423			21,945
	Construction and other consumer real estate	314,931				4,344				1,960			6,304			321,235			395			2,500
	Bankcard and other revolving plans	302,587				2,439				1,402			3,841			306,428			1,010			721
	Other	213,930				1,411				1,038			2,449			216,379			107			275
	Total consumer loans	7,283,781				36,290				51,980			88,270			7,372,051			2,935			34,287
	FDIC-supported loans	454,333				12,407				61,501			73,908			528,241			52,033			7,393
	Total	$	37,046,712			$	269,740			$	348,795		$	618,535		$	37,665,247		$	61,763		$	288,728
	1 Represents nonaccrual loans not past due more than 30 days; however, full payment of principal and interest is still not expected.
Summary Of Outstanding Loan Balances (Accruing And Nonaccruing) Categorized By Credit Quality Indicators	'
		December 31, 2013
	(In thousands)	Pass				Special				Sub-			Doubtful			Total			Total
						Mention				standard						loans			allowance
	Commercial:
	Commercial and industrial	$	11,807,825			$	303,598			$	360,391		$	9,269		$	12,481,083
	Leasing	380,268				2,050				5,611			—			387,929
	Owner occupied	6,827,464				184,328				425,403			—			7,437,195
	Municipal	439,432				—				9,986			—			449,418
	Total commercial	19,454,989				489,976				801,391			9,269			20,755,625			$	465,145
	Commercial real estate:
	Construction and land development	2,107,828				15,010				59,983			—			2,182,821
	Term	7,569,472				172,856				263,509			—			8,005,837
	Total commercial real estate	9,677,300				187,866				323,492			—			10,188,658			213,363
	Consumer:
	Home equity credit line	2,111,475				—				21,645			—			2,133,120
	1-4 family residential	4,668,841				—				67,824			—			4,736,665
	Construction and other consumer real estate	313,881				—				11,041			—			324,922
	Bankcard and other revolving plans	353,618				—				2,622			—			356,240
	Other	196,770				—				1,094			—			197,864
	Total consumer loans	7,644,585				—				104,226			—			7,748,811			60,865
	FDIC-supported loans	232,893				22,532				94,846			—			350,271			6,918
	Total	$	37,009,767			$	700,374			$	1,323,955		$	9,269		$	39,043,365		$	746,291
		December 31, 2012
	(In thousands)	Pass				Special				Sub-			Doubtful			Total			Total
						Mention				standard						loans			allowance
	Commercial:
	Commercial and industrial	$	10,717,594			$	198,645			$	336,230		$	4,476		$	11,256,945
	Leasing	419,482				226				2,805			—			422,513
	Owner occupied	6,833,923				138,539				612,011			4,609			7,589,082
	Municipal	453,193				31,756				9,234			—			494,183
	Total commercial	18,424,192				369,166				960,280			9,085			19,762,723			$	510,908
	Commercial real estate:
	Construction and land development	1,648,215				57,348				233,374			476			1,939,413
	Term	7,433,789				237,201				388,914			2,915			8,062,819
	Total commercial real estate	9,082,004				294,549				622,288			3,391			10,002,232			276,976
	Consumer:
	Home equity credit line	2,138,693				85				38,897			5			2,177,680
	1-4 family residential	4,234,426				4,316				111,063			524			4,350,329
	Construction and other consumer real estate	313,499				218				7,518			—			321,235
	Bankcard and other revolving plans	298,665				23				7,740			—			306,428
	Other	209,293				3,211				3,875			—			216,379
	Total consumer loans	7,194,576				7,853				169,093			529			7,372,051			95,656
	FDIC-supported loans	327,609				24,980				175,652			—			528,241			12,547
	Total	$	35,028,381			$	696,548			$	1,927,313		$	13,005		$	37,665,247		$	896,087
Summary Of Information On Impaired Loans	'
		December 31, 2013																	Year Ended
																			31-Dec-13
	(In thousands)	Unpaid				Recorded investment							Total			Related			Average			Interest
		principal											recorded			allowance			recorded			income
		balance				with no				with			investment						investment			recognized
						allowance				allowance
	Commercial:
	Commercial and industrial	$	178,281			$	30,092			$	126,692		$	156,784		$	23,687		$	185,895		$	3,572
	Owner occupied	151,499				50,361				88,584			138,945			13,900			216,218			3,620
	Total commercial	329,780				80,453				215,276			295,729			37,587			402,113			7,192
	Commercial real estate:
	Construction and land development	85,440				19,206				50,744			69,950			3,483			134,540			4,013
	Term	171,826				34,258				112,330			146,588			7,981			286,389			6,686
	Total commercial real estate	257,266				53,464				163,074			216,538			11,464			420,929			10,699
	Consumer:
	Home equity credit line	17,547				12,568				2,200			14,768			178			13,380			385
	1-4 family residential	95,613				38,775				42,132			80,907			10,276			100,283			1,581
	Construction and other consumer real estate	4,713				2,643				933			3,576			175			6,218			148
	Bankcard and other revolving plans	726				726				—			726			—			—			—
	Other	—				—				—			—			—			1,770			—
	Total consumer loans	118,599				54,712				45,265			99,977			10,629			121,651			2,114
	FDIC-supported loans	404,308				83,917				228,392			312,309			6,526			384,402			112,082		1
	Total	$	1,109,953			$	272,546			$	652,007		$	924,553		$	66,206		$	1,329,095		$	132,087
		December 31, 2012																	Year Ended
																			31-Dec-12
	(In thousands)	Unpaid				Recorded investment							Total			Related			Average			Interest
		principal											recorded			allowance			recorded			income
		balance				with no				with			investment						investment			recognized
						allowance				allowance
	Commercial:
	Commercial and industrial	$	176,521			$	27,035			$	119,780		$	146,815		$	12,198		$	199,238		$	3,557
	Owner occupied	210,319				79,413				106,282			185,695			17,105			262,511			2,512
	Total commercial	386,840				106,448				226,062			332,510			29,303			461,749			6,069
	Commercial real estate:
	Construction and land development	182,385				67,241				85,855			153,096			5,178			274,226			4,785
	Term	310,242				70,718				187,112			257,830			16,725			410,901			7,298
	Total commercial real estate	492,627				137,959				272,967			410,926			21,903			685,127			12,083
	Consumer:
	Home equity credit line	14,339				8,055				3,444			11,499			297			2,766			42
	1-4 family residential	108,934				42,602				49,867			92,469			12,921			107,118			1,629
	Construction and other consumer real estate	7,054				2,710				3,085			5,795			517			9,697			188
	Bankcard and other revolving plans	287				—				287			287			1			24			—
	Other	2,454				1,832				175			2,007			22			1,055			—
	Total consumer loans	133,068				55,199				56,858			112,057			13,758			120,660			1,859
	FDIC-supported loans	895,804				275,187				195,158			470,345			12,125			622,125			89,921		1
	Total	$	1,908,339			$	574,793			$	751,045		$	1,325,838		$	77,089		$	1,889,661		$	109,932
	1	The balance of interest income recognized results primarily from accretion of interest income on impaired FDIC-supported loans.
Summary Of Selected Information On TDRs That Includes Recorded Investment On An Accruing And Nonaccruing Basis By Loan Class And Modification Type	'
		December 31, 2013
		Recorded investment resulting from the following modification types:
	(In thousands)	Interest				Maturity				Principal			Payment			Other1			Multiple			Total
		rate below				or term				forgiveness			deferral						modification
		market				extension													types2
	Accruing
	Commercial:
	Commercial and industrial	$	1,143			$	9,848			$	11,491		$	3,217		$	4,308		$	53,117		$	83,124
	Owner occupied	22,841				1,482				987			1,291			9,659			23,576			59,836
	Total commercial	23,984				11,330				12,478			4,508			13,967			76,693			142,960
	Commercial real estate:
	Construction and land development	1,067				8,231				—			1,063			4,119			28,295			42,775
	Term	7,542				9,241				190			3,783			14,932			61,024			96,712
	Total commercial real estate	8,609				17,472				190			4,846			19,051			89,319			139,487
	Consumer:
	Home equity credit line	743				—				9,438			—			323			332			10,836
	1-4 family residential	2,628				997				6,814			643			3,083			35,869			50,034
	Construction and other consumer real estate	128				329				11			—			—			1,514			1,982
	Other	—				—				—			—			—			—			—
	Total consumer loans	3,499				1,326				16,263			643			3,406			37,715			62,852
	Total accruing	36,092				30,128				28,931			9,997			36,424			203,727			345,299
	Nonaccruing
	Commercial:
	Commercial and industrial	2,028				6,989				—			473			8,948			10,395			28,833
	Owner occupied	3,020				1,489				1,043			1,593			10,482			14,927			32,554
	Total commercial	5,048				8,478				1,043			2,066			19,430			25,322			61,387
	Commercial real estate:
	Construction and land development	11,699				1,555				—			—			5,303			8,617			27,174
	Term	2,126				—				—			1,943			315			14,861			19,245
	Total commercial real estate	13,825				1,555				—			1,943			5,618			23,478			46,419
	Consumer:
	Home equity credit line	—				—				1,036			—			221			—			1,257
	1-4 family residential	4,315				1,396				1,606			—			3,901			14,109			25,327
	Construction and other consumer real estate	4				1,260				—			—			—			229			1,493
	Bankcard and other revolving plans	—				252				—			—			—			—			252
	Other	—				—				—			—			—			—			—
	Total consumer loans	4,319				2,908				2,642			—			4,122			14,338			28,329
	Total nonaccruing	23,192				12,941				3,685			4,009			29,170			63,138			136,135
	Total	$	59,284			$	43,069			$	32,616		$	14,006		$	65,594		$	266,865		$	481,434
		December 31, 2012
		Recorded investment resulting from the following modification types:
	(In thousands)	Interest				Maturity				Principal			Payment			Other1			Multiple			Total
		rate below				or term				forgiveness			deferral						modification
		market				extension													types2
	Accruing
	Commercial:
	Commercial and industrial	$	5,388			$	6,139			$	—		$	3,585		$	17,647		$	44,684		$	77,443
	Owner occupied	20,963				12,104				—			4,013			9,305			13,598			59,983
	Total commercial	26,351				18,243				—			7,598			26,952			58,282			137,426
	Commercial real estate:
	Construction and land development	1,718				9,868				2			59			8,432			30,248			50,327
	Term	30,118				1,854				8,433			3,807			32,302			82,809			159,323
	Total commercial real estate	31,836				11,722				8,435			3,866			40,734			113,057			209,650
	Consumer:
	Home equity credit line	744				—				5,965			—			300			218			7,227
	1-4 family residential	2,665				1,324				5,923			147			3,319			36,199			49,577
	Construction and other consumer real estate	147				—				—			—			641			2,354			3,142
	Other	—				3				—			—			1			—			4
	Total consumer loans	3,556				1,327				11,888			147			4,261			38,771			59,950
	Total accruing	61,743				31,292				20,323			11,611			71,947			210,110			407,026
	Nonaccruing
	Commercial:
	Commercial and industrial	318				5,667				—			480			2,035			17,379			25,879
Owner occupied	3,822				4,816				654			4,701			7,643			7,803			29,439
Total commercial	4,140				10,483				654			5,181			9,678			25,182			55,318
Commercial real estate:
Construction and land development	18,255				1,308				—			—			1,807			68,481			89,851
Term	3,042				536				—			2,645			9,389			17,718			33,330
Total commercial real estate	21,297				1,844				—			2,645			11,196			86,199			123,181
Consumer:
Home equity credit line	—				—				4,008			—			131			143			4,282
1-4 family residential	4,697				5,637				4,048			—			1,693			14,240			30,315
Construction and other consumer real estate	7				1,671				—			—			—			243			1,921
Bankcard and other revolving plans	—				287				—			—			—			—			287
Other	—				—				—			172			—			—			172
Total consumer loans	4,704				7,595				8,056			172			1,824			14,626			36,977
Total nonaccruing	30,141				19,922				8,710			7,998			22,698			126,007			215,476
Total	$	91,884			$	51,214			$	29,033		$	19,609		$	94,645		$	336,117		$	622,502
1 Includes TDRs that resulted from other modification types including, but not limited to, a legal judgment awarded on different terms, a bankruptcy plan confirmed on different terms, a settlement that includes the delivery of collateral in exchange for debt reduction, etc.
2 Includes TDRs that resulted from a combination of any of the previous modification types.
Schedule Of Net Financial Impact On Interest Income Due To Interest Rate Modifications Below Market For Accruing TDR Loans	'
			Year Ended
			December 31,
	(In thousands)		2013				2012
	Commercial:
	Commercial and industrial		$	(1	)		$	(287	)
	Owner occupied		(4,672		)		(1,612		)
	Total commercial		(4,673		)		(1,899		)
	Commercial real estate:
	Construction and land development		(1,342		)		(1,069		)
	Term		(8,908		)		(6,664		)
	Total commercial real estate		(10,250		)		(7,733		)
	Consumer:
	Home equity credit line		(121		)		(86		)
	1-4 family residential		(14,980		)		(16,164		)
	Construction and other consumer real estate		(433		)		(674		)
	Total consumer loans		(15,534		)		(16,924		)
	Total decrease to interest income1		$	(30,457	)		$	(26,556	)
	1	Calculated based on the difference between the modified rate and the premodified rate applied to the recorded investment.
Schedule Of Investment Of Accruing And Nonaccruing Loans Modified As Troubled Debt Restructurings	'
	(In thousands)		31-Dec-13											31-Dec-12
			Accruing				Nonaccruing				Total			Accruing			Nonaccruing			Total
	Commercial:
	Commercial and industrial		$	—			$	—			$	—		$	—		$	1,816		$	1,816
	Owner occupied		—				430				430			159			679			838
	Total commercial		—				430				430			159			2,495			2,654
	Commercial real estate:
	Construction and land development		—				1,676				1,676			—			—			—
	Term		—				—				—			—			—			—
	Total commercial real estate		—				1,676				1,676			—			—			—
	Consumer:
	Home equity credit line		—				342				342			—			336			336
	1-4 family residential		—				2,592				2,592			—			8,085			8,085
	Total consumer loans		—				2,934				2,934			—			8,421			8,421
	Total		$	—			$	5,040			$	5,040		$	159		$	10,916		$	11,075
Schedule Of Outstanding Balances Of All Required Payments And The Related Carrying Amounts For PCI Loans	'
		December 31,
	(In thousands)	2013				2012
	Commercial	$	150,191			$	227,414
	Commercial real estate	233,720				382,068
	Consumer	28,608				41,398
	Outstanding balance	$	412,519			$	650,880
	Carrying amount	$	311,797			$	472,040
	ALLL	6,478				12,077
	Carrying amount, net	$	305,319			$	459,963
Schedule Of Changes In The Accretable Yield For PCI Loans	'
	(In thousands)	2013				2012
	Balance at beginning of year	$	134,461			$	184,679
	Accretion	(111,951		)		(89,849		)
	Reclassification from nonaccretable difference	36,467				30,632
	Disposals and other	18,551				8,999
	Balance at end of year	$	77,528			$	134,461
Schedule Of Changes In The FDIC Indemnification Asset	'
	(In thousands)	2013				2012
	Balance at beginning of year	$	90,929			$	133,810
	Amounts filed with the FDIC and collected or in process	21,302				17,004
	Net change in asset balance due to reestimation of projected cash flows 1	(85,820		)		(59,885		)
	Balance at end of year	$	26,411			$	90,929
	1	Negative amounts result from the accretion of loan balances based on increases in cash flow estimates on the underlying indemnified loans.

Derivative_Instruments_And_Hed1

Derivative Instruments And Hedging Activities Amount of Derivative Gain/Loss Recognized/Reclassified (Tables)	12 Months Ended
	Dec. 31, 2013
Summary of Derivative Instruments [Abstract]	'
Schedule of Derivative Instruments	'
		December 31, 2013									December 31, 2012
		Notional			Fair value						Notional		Fair value
	(In thousands)	amount			Other			Other			amount		Other		Other
					assets			liabilities					assets		liabilities
	Derivatives designated as hedging instruments
	Cash flow hedges 1:
	Interest rate swaps	$	100,000		$	202		$	583		$	150,000	$	1,188	$	—
	Total derivatives designated as hedging instruments	100,000			202			583			150,000		1,188		—
	Derivatives not designated as hedging instruments
	Interest rate swaps	65,850			420			421			98,524		1,043		1,047
	Interest rate swaps for customers 2	2,902,776			55,447			54,688			2,607,603		79,579		82,926
	Foreign exchange	751,066			9,614			8,643			520,696		4,404		3,159
	Total return swap	1,159,686			—			4,062			1,159,686		—		5,127
	Total derivatives not designated as hedging instruments	4,879,378			65,481			67,814			4,386,509		85,026		92,259
	Total derivatives	$	4,979,378		$	65,683		$	68,397		$	4,536,509	$	86,214	$	92,259
Schedule Of Gain (Loss) Of Derivative Instruments	'
		Year Ended December 31, 2013											Year Ended December 31, 2012
		Amount of derivative gain (loss) recognized/reclassified
	(In thousands)	OCI			Reclassified			Noninterest			Offset to		OCI		Reclassified			Noninterest			Offset to
					from AOCI			income			interest				from AOCI			income			interest
					to interest			(expense)			expense				to interest			(expense)			expense
					income										income
	Derivatives designated as hedging instruments
	Asset derivatives
	Cash flow hedges 1:
	Interest rate swaps	$	(225	)	$	2,647							$	390	$	13,062
		(225		)	2,647		3						390		13,062		3
	Liability derivatives
	Fair value hedges:
	Terminated swaps on long-term debt										$	3,120									$	3,054
	Total derivatives designated as hedging instruments	(225		)	2,647						3,120		390		13,062						3,054
	Derivatives not designated as hedging instruments
	Interest rate swaps							$	(493	)								$	(1,467	)
	Interest rate swaps for customers 2							10,918										7,858
	Basis swaps							—										18
	Futures contracts							2										(13		)
	Foreign exchange							9,190										8,628
	Total return swap							(21,753		)								(21,707		)
	Total derivatives not designated as hedging instruments							(2,136		)								(6,683		)
	Total derivatives	$	(225	)	$	2,647		$	(2,136	)	$	3,120	$	390	$	13,062		$	(6,683	)	$	3,054
	Note: These schedules are not intended to present at any given time the Company’s long/short position with respect to its derivative contracts.
	1 Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the derivative gain (loss).
	2 Amounts include both the customer swaps and the offsetting derivative contracts.
	3 Amounts of $2.6 million for 2013 and $13.1 million for 2012 are the amounts of reclassification to earnings presented in the tabular changes of AOCI in Note 14.

Goodwill_And_Other_Intangible_1

Goodwill And Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Amortizing Intangible Assets	'
		Gross carrying amount				Accumulated amortization						Net carrying amount
	(In thousands)	2013		2012		2013			2012			2013			2012
	Core deposit intangibles	$	180,290	$	180,290	$	(146,557	)	$	(133,628	)	$	33,733		$	46,662
	Customer relationships and other intangibles	29,064		29,064		(26,353		)	(24,908		)	2,711			4,156
		$	209,354	$	209,354	$	(172,910	)	$	(158,536	)	$	36,444		$	50,818
Schedule Of Estimated Amortization Expense	'
	(In thousands)
	2014	$	10,924
	2015	9,247
	2016	7,888
	2017	6,370
	2018	1,556
Schedule Of Goodwill	'
	(In thousands)	Zions Bank		CB&T		Amegy			Other			Consolidated Company
	Balance at December 31, 2011	$	19,514	$	379,024	$	615,591		$	1,000		$	1,015,129
	Impairment losses	—		—		—			(1,000		)	(1,000		)
	Balance at December 31, 2012	19,514		379,024		615,591			—			1,014,129
	Impairment losses	—		—		—			—			—
	Balance at December 31, 2013	$	19,514	$	379,024	$	615,591		$	—		$	1,014,129

Deposits_Tables

Deposits (Tables)	12 Months Ended
	Dec. 31, 2013
Maturities of All Time Deposits [Abstract]	'
Deposit Liabilities Disclosures [Text Block]	'
	11	DEPOSITS
	At December 31, 2013, the scheduled maturities of all time deposits were as follows:
	(In thousands)
	2014		$	2,216,605
	2015		265,984
	2016		161,620
	2017		86,903
	2018		113,534
	Thereafter		663
			$	2,845,309
	At December 31, 2013, the contractual maturities of domestic time deposits with a denomination of $100,000 and over were as follows: $351 million in 3 months or less, $301 million over 3 months through 6 months, $374 million over 6 months through 12 months, and $304 million over 12 months.
	Domestic time deposits under $100,000 were $1.3 billion and $1.5 billion at December 31, 2013 and 2012, respectively. Domestic time deposits $100,000 and over were $1.3 billion and $1.5 billion at December 31, 2013 and 2012, respectively. Foreign time deposits $100,000 and over were $252 million and $213 million at December 31, 2013 and 2012, respectively.
	Deposit overdrafts reclassified as loan balances were $39 million and $78 million at December 31, 2013 and 2012, respectively.
Maturity of All Time Deposits [Table Text Block]	'
	(In thousands)
	2014		$	2,216,605
	2015		265,984
	2016		161,620
	2017		86,903
	2018		113,534
	Thereafter		663
			$	2,845,309

ShortTerm_Borrowings_Tables

Short-Term Borrowings (Tables)	0 Months Ended										12 Months Ended
	Dec. 31, 2013										Dec. 31, 2013
Short-term Debt [Line Items]	'										'
Summary Of Short-Term Borrowings	'										'
	(Amounts in thousands)	2013			2012			2011
	Federal funds purchased:
	Average amount outstanding	$	150,217		$	280,859		$	312,730
	Weighted average rate	0.15		%	0.19		%	0.2		%
	Highest month-end balance	$	206,450		$	560,674		$	361,217
	Year-end balance	129,131			175,468			214,224
	Weighted average rate on outstandings at year-end	0.14		%	0.13		%	0.2		%
	Security repurchase agreements:
	Average amount outstanding	$	124,929		$	190,365		$	340,015
	Weighted average rate	0.05		%	0.04		%	0.05		%
	Highest month-end balance	$	137,611		$	264,187		$	393,874
	Year-end balance	137,611			145,010			393,874
	Weighted average rate on outstandings at year-end	0.05		%	0.04		%	0.06		%
	Federal funds purchased and security repurchase agreements at year-end	$	266,742		$	320,478		$	608,098
Summary Of Other Short-Term Borrowings	'										'
												December 31,
											(In thousands)	2013		2012
											Senior medium-term notes	$	—	$	4,951
											Commercial paper	—		—
											Other	—		458
												$	—	$	5,409

LongTerm_Debt_Tables

Long-Term Debt (Tables)	0 Months Ended			12 Months Ended
	Dec. 31, 2013			Dec. 31, 2013
Long-term Debt, Unclassified [Abstract]	'			'
Schedule Of Long-Term Debt	'			'
						December 31,
				(In thousands)		2013			2012
				Junior subordinated debentures related to trust preferred securities		$	168,043		$	461,858
				Convertible subordinated notes		184,147			308,468
				Subordinated notes		443,231			217,175
				Senior notes		1,454,779			1,325,630
				FHLB advances		22,736			23,300
				Capital lease obligations and other		639			682
						$	2,273,575		$	2,337,113
Schedule Of Trust Preferred Securities	'			'
				(Amounts in thousands)		Balance			Coupon rate 1		Maturity
				Amegy Statutory Trust I		$	51,547		3mL+2.85% (3.09%)		Dec-33
				Amegy Statutory Trust II		36,083			3mL+1.90% (2.14%)		Oct-34
				Amegy Statutory Trust III		61,856			3mL+1.78% (2.02%)		Dec-34
				Stockmen’s Statutory Trust II		7,732			3mL+3.15% (3.40%)		Mar-33
				Stockmen’s Statutory Trust III		7,732			3mL+2.89% (3.13%)		Mar-34
				Intercontinental Statutory Trust I		3,093			3mL+2.85% (3.09%)		Mar-34
						$	168,043
Schedule Of Subordinated Notes	'			'
				(Amounts in thousands)		Convertible						Subordinated notes
						subordinated notes
				Coupon rate		Balance			Par amount			Balance			Par amount			Maturity
				5.65%		$	70,218		$	75,704		$	30,494		$	30,173		May-14
				6.00%		60,107			79,292			33,697			32,366			Sep-15
				5.50%		53,822			71,595			54,149			52,078			Nov-15
				5.65%								162,000			162,000			Nov-23
				6.95%								87,891			87,891			Sep-28
				3mL+1.25% (1.50%)	1							75,000			75,000		2	Sep-14
						$	184,147		$	226,591		$	443,231		$	439,508
Schedule Of Convertible Debt Discount Amortized	'			'
				(In thousands)		2013			2012			2011
				Balance at beginning of year		$	149,333		$	224,206		$	385,831
				Discount amortization on convertible subordinated debt		(48,378		)	(43,341		)	(46,021		)
				Accelerated discount amortization on convertible subordinated debt		(368		)	(31,532		)	(115,604		)
				Accelerated discount amortization resulting from tender offer for debt repurchases (subsequently discussed)		(58,143		)	—			—
				Total amortization		(106,889		)	(74,873		)	(161,625		)
				Balance at end of year		$	42,444		$	149,333		$	224,206
Schedule Of Senior Medium-Term Notes	'			'
				(Amounts in thousands)
				Coupon rate		Balance			Par amount			Maturity
				7.75%		$	235,382		$	240,769		Sep-14
				4.00%		196,103			198,448			Jun-16
				4.50%		388,467			400,000			Mar-17
				4.50%		299,199			300,000			Jun-23
				2.55% - 5.50%		335,628			335,881			Feb 2014 - Nov 2019
						$	1,454,779
Schedule Of Maturities On Long-Term Debt	'			'
				(In thousands)		Consolidated			Parent only
	Senior Notes:	Maturity
	Coupon rate	Low	High	2014		$	460,825		$	385,771
	2.55% - 5.50%	Feb-14	Nov-19
				2015		279,538			279,482
				2016		318,057			318,004
				2017		405,923			405,865
				2018		38,346			38,285
				Thereafter		767,073			591,400
						$	2,269,762		$	2,018,807

Shareholders_Equity_Tables

Shareholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2013
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]	'
Summary Of Preferred Stock	'
	Preferred stock is summarized as follows:
	(Amounts in		Carrying value at								Shares at							Dividends payable		Earliest	Rate following earliest redemption date	Dividends payable after rate change
	thousands)		December 31,								31-Dec-13									redemption date
			2013				2012				Authorized			Outstanding			Rate
																					(when applicable)
	Series A		$	66,127			$	60,220			140,000			66,000			> of 4.0% or 3mL+0.52%	Qtrly Mar,Jun,Sep,Dec		15-Dec-11
	Series C		—				924,332
	Series F		143,750				143,750				250,000			143,750			7.90%	Qtrly Mar,Jun,Sep,Dec		15-Jun-17
	Series G		171,827				—				200,000			171,827			6.30%	Qtrly Mar,Jun,Sep,Dec		15-Mar-23	annual float-ing rate =mL+4.24%
	Series H		126,221				—				126,221			126,221			5.75%	Qtrly Mar,Jun,Sep,Dec		15-Jun-19
	Series I		300,893				—				300,893			300,893			5.80%	Semi-annually Jun,Dec		15-Jun-23	annual float-ing rate =mL+3.8%	Qtrly Mar,Jun,Sep,Dec
	Series J		195,152				—				195,152			195,152			7.20%	Semi-annually Mar,Sep		15-Sep-23	annual float-ing rate =mL+4.44%	Qtrly Mar,Jun,Sep,Dec
			$	1,003,970			$	1,128,302
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	'
															Statement of income (SI) Balance sheet
	(In thousands)		Amounts reclassified from AOCI 1												(BS)
	Details about AOCI components		2013				2012				2011						Affected line item
	Net realized gains (losses) on investment securities		$	(2,898	)		$	19,544			$	11,868			SI		Fixed income securities gains (losses), net
	Income tax expense (benefit)		(1,123		)		7,340				4,476
			(1,775		)		12,204				7,392
	Net unrealized losses on investment		(164,732		)		(103,720		)		(32,914		)		SI		Net impairment losses on investment securities
	securities
	Income tax benefit		(64,829		)		(40,156		)		(12,670		)
			(99,903		)		(63,564		)		(20,244		)
	Accretion of securities with noncredit-related impairment losses not expected to be sold		(2,106		)		(11,351		)		(665		)		BS		Investment securities, held-to-maturity
	Deferred income taxes		848				4,488				255				BS		Other assets
			$	(102,936	)		$	(58,223	)		$	(13,262	)
	Net unrealized gains on derivative instruments		$	2,647			$	13,062			$	37,273			SI		Interest and fees on loans
	Income tax expense		1,067				5,220				15,019
			$	1,580			$	7,842			$	22,254
	Amortization of net actuarial loss		$	(8,127	)		$	(8,983	)		$	(5,149	)		SI		Salaries and employee benefits
	Amortization of prior service credit		27				120				120				SI		Salaries and employee benefits
	Income tax benefit		(3,194		)		(3,497		)		(1,979		)
			$	(4,906	)		$	(5,366	)		$	(3,050	)
	1 Negative reclassification amounts indicate decreases to earnings in the statement of income and increases to balance sheet assets. The opposite applies to positive reclassification amounts.
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	'
	Changes in AOCI by component are as follows:
	(In thousands)		Net unrealized gains (losses) on investment securities						Net unrealized gains (losses) on derivative instruments						Pension and post-retirement			Total
	2013:00:00
	Balance at December 31, 2012			$	(397,616	)				$	1,794				$	(50,335	)	$	(446,157	)
	Other comprehensive income (loss) before reclassifications, net of tax			127,648						(431		)			20,577			147,794
	Amounts reclassified from AOCI, net of tax			102,936						(1,580		)			4,906			106,262
	Other comprehensive income (loss)			230,584						(2,011		)			25,483			254,056
	Balance at December 31, 2013			$	(167,032	)				$	(217	)			$	(24,852	)	$	(192,101	)
	Income tax expense (benefit) included in other comprehensive income (loss)			$	144,343					$	(861	)			$	16,625		$	160,107
	2012:00:00
	Balance at December 31, 2011			$	(546,763	)				$	9,404				$	(54,725	)	$	(592,084	)
	Other comprehensive income (loss) before reclassifications, net of tax			90,924						232					(976		)	90,180
	Amounts reclassified from AOCI, net of tax			58,223						(7,842		)			5,366			55,747
	Other comprehensive income (loss)			149,147						(7,610		)			4,390			145,927
	Balance at December 31, 2012			$	(397,616	)				$	1,794				$	(50,335	)	$	(446,157	)
	Income tax expense (benefit) included in other comprehensive income (loss)			$	93,213					$	(5,063	)			$	2,870		$	91,020
Shareholders' Equity	'
	14	SHAREHOLDERS’ EQUITY
	Preferred Stock
	Preferred stock is without par value and has a liquidation preference of $1,000 per share, or $25 per depositary share. Except for Series I and J, all preferred shares were issued in the form of depositary shares, with each depositary share representing a 1/40th ownership interest in a share of the preferred stock. All preferred shares are registered with the SEC.
	In general, preferred shareholders may receive asset distributions before common shareholders; however, preferred shareholders have only limited voting rights generally with respect to certain provisions of the preferred stock, the issuance of senior preferred stock, and the election of directors. Preferred stock dividends reduce earnings available to common shareholders and are paid on the 15th day of the months indicated in the following schedule. Dividends are approved by the Board of Directors and are subject to regulatory approval. Redemption of the preferred stock is at the Company’s option after the expiration of any applicable redemption restrictions. The redemption amount is computed at the per share liquidation preference plus any declared but unpaid dividends. Redemptions are subject to certain regulatory provisions.
	Preferred stock is summarized as follows:
	(Amounts in		Carrying value at								Shares at							Dividends payable		Earliest	Rate following earliest redemption date	Dividends payable after rate change
	thousands)		December 31,								31-Dec-13									redemption date
			2013				2012				Authorized			Outstanding			Rate
																					(when applicable)
	Series A		$	66,127			$	60,220			140,000			66,000			> of 4.0% or 3mL+0.52%	Qtrly Mar,Jun,Sep,Dec		15-Dec-11
	Series C		—				924,332
	Series F		143,750				143,750				250,000			143,750			7.90%	Qtrly Mar,Jun,Sep,Dec		15-Jun-17
	Series G		171,827				—				200,000			171,827			6.30%	Qtrly Mar,Jun,Sep,Dec		15-Mar-23	annual float-ing rate =mL+4.24%
	Series H		126,221				—				126,221			126,221			5.75%	Qtrly Mar,Jun,Sep,Dec		15-Jun-19
	Series I		300,893				—				300,893			300,893			5.80%	Semi-annually Jun,Dec		15-Jun-23	annual float-ing rate =mL+3.8%	Qtrly Mar,Jun,Sep,Dec
	Series J		195,152				—				195,152			195,152			7.20%	Semi-annually Mar,Sep		15-Sep-23	annual float-ing rate =mL+4.44%	Qtrly Mar,Jun,Sep,Dec
			$	1,003,970			$	1,128,302
	Series C Preferred Stock Redemption
	On September 15, 2013, we redeemed all of the outstanding $800 million par amount (799,467 shares) of our 9.5% Series C preferred stock at 100% of the $25 per depositary share redemption amount. As shown in the previous schedule, the summation of December 31, 2013 carrying values for Series G, H, I and J, plus the change in carrying value for Series A between December 31, 2013 and 2012 (reflecting the reopening of Series A preferred shares in 2013), equal the $800 million used to fund this redemption. The Federal Reserve did not object to the element of our Capital Plan to redeem the entire $800 million of our Series C preferred stock subject to issuing an equivalent amount of new preferred shares.
	The redemption reduced preferred stock by the $926 million carrying value (at the time of redemption) of the Series C preferred stock. The difference from the par amount, or $126 million, related to the intrinsic value of the beneficial conversion feature (“BCF”) associated with the convertible subordinated debt. The BCF represented the difference on the original commitment date of the fair values of the convertible subordinated debt and the preferred stock into which the debt was convertible. The total BCF of $203 million was included in common stock when the subordinated debt was modified to convertible subordinated debt in June 2009. The Company has “no par” common stock and all additional paid-in capital transactions such as this are recorded in common stock.
	Portions of the BCF have been transferred since July 2009 from common stock to preferred stock as holders of convertible subordinated debt exercised rights to convert to the Series C preferred stock. Prior to the redemption, these BCF transfers amounted to $0.2 million in 2013, $15.2 million in 2012, and $43.1 million in 2011. Amounts transferred became part of the carrying value of the preferred stock. The $126 million BCF transfer was recorded as a preferred stock redemption in the 2013 statement of income. At December 31, 2013, the remaining balance in common stock of the BCF was approximately $76.4 million. Although the legal right to convert continues to exist, if no further conversions occur or the convertible debt matures, the current amount of the BCF will remain in common stock.
	Other Preferred Stock Redemptions
	The Series D preferred stock was redeemed in two equal installments by September 26, 2012. The total of $1.4 billion had been issued by the U.S. Department of the Treasury under the Troubled Asset Relief Program (“TARP”) Capital Purchase Program (“CPP”). The associated warrants to purchase 5.8 million shares of common stock were auctioned by the U.S. Treasury in December 2012. The Company did not receive any proceeds from the warrant auction. The warrants have an exercise price of $36.27 per share and expire November 14, 2018. The TARP redemption accelerated the amortization to preferred stock dividends in 2012 of the entire remaining unamortized discount. Amortization amounted to $44.7 million in 2012 and $21.6 million in 2011.
	The entire Series E preferred stock of $142.5 million was redeemed on its call date of June 15, 2012. Commissions and fees of $3.8 million previously recorded in common stock were charged to retained earnings. Proceeds from the Series F preferred stock were used to redeem the Series E preferred stock.
	Common Stock
	In 2011, we issued $25.5 million of new common stock under a common equity distribution agreement. The issuance consisted of approximately 1.1 million shares at an average price of $23.89 per share. Net of commissions and fees, this issuances added $25.0 million to common stock.
	In addition to the TARP warrants previously discussed, we have issued a total of 29.3 million common stock warrants that can each be exercised for a share of common stock at an initial price of $36.63 through May 22, 2020.
	Accumulated Other Comprehensive Income
	Effective January 1, 2013, we adopted ASU 2013-02, Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income. This new guidance under ASU 220, Comprehensive Income, follows ASUs 2011-12 and 2011-05 and finalizes the reporting requirements for reclassifications out of AOCI. Companies must present reclassifications by component when reporting changes in AOCI. Items reclassified in their entirety out of AOCI to net income must have the effect of the reclassification disclosed according to the respective income statement line item. Items not reclassified in their entirety must be cross-referenced to other disclosures in the footnotes. The entire reclassification information must be disclosed in one location, either on the face of the financial statements by income statement line item, or in a footnote. We have elected to present the information in a footnote and include the comparison to the previous year.
	Changes in AOCI by component are as follows:
	(In thousands)		Net unrealized gains (losses) on investment securities						Net unrealized gains (losses) on derivative instruments						Pension and post-retirement			Total
	2013:00:00
	Balance at December 31, 2012			$	(397,616	)				$	1,794				$	(50,335	)	$	(446,157	)
	Other comprehensive income (loss) before reclassifications, net of tax			127,648						(431		)			20,577			147,794
	Amounts reclassified from AOCI, net of tax			102,936						(1,580		)			4,906			106,262
	Other comprehensive income (loss)			230,584						(2,011		)			25,483			254,056
	Balance at December 31, 2013			$	(167,032	)				$	(217	)			$	(24,852	)	$	(192,101	)
	Income tax expense (benefit) included in other comprehensive income (loss)			$	144,343					$	(861	)			$	16,625		$	160,107
	2012:00:00
	Balance at December 31, 2011			$	(546,763	)				$	9,404				$	(54,725	)	$	(592,084	)
	Other comprehensive income (loss) before reclassifications, net of tax			90,924						232					(976		)	90,180
	Amounts reclassified from AOCI, net of tax			58,223						(7,842		)			5,366			55,747
	Other comprehensive income (loss)			149,147						(7,610		)			4,390			145,927
	Balance at December 31, 2012			$	(397,616	)				$	1,794				$	(50,335	)	$	(446,157	)
	Income tax expense (benefit) included in other comprehensive income (loss)			$	93,213					$	(5,063	)			$	2,870		$	91,020
															Statement of income (SI) Balance sheet
	(In thousands)		Amounts reclassified from AOCI 1												(BS)
	Details about AOCI components		2013				2012				2011						Affected line item
	Net realized gains (losses) on investment securities		$	(2,898	)		$	19,544			$	11,868			SI		Fixed income securities gains (losses), net
	Income tax expense (benefit)		(1,123		)		7,340				4,476
			(1,775		)		12,204				7,392
	Net unrealized losses on investment		(164,732		)		(103,720		)		(32,914		)		SI		Net impairment losses on investment securities
	securities
	Income tax benefit		(64,829		)		(40,156		)		(12,670		)
			(99,903		)		(63,564		)		(20,244		)
	Accretion of securities with noncredit-related impairment losses not expected to be sold		(2,106		)		(11,351		)		(665		)		BS		Investment securities, held-to-maturity
	Deferred income taxes		848				4,488				255				BS		Other assets
			$	(102,936	)		$	(58,223	)		$	(13,262	)
	Net unrealized gains on derivative instruments		$	2,647			$	13,062			$	37,273			SI		Interest and fees on loans
	Income tax expense		1,067				5,220				15,019
			$	1,580			$	7,842			$	22,254
	Amortization of net actuarial loss		$	(8,127	)		$	(8,983	)		$	(5,149	)		SI		Salaries and employee benefits
	Amortization of prior service credit		27				120				120				SI		Salaries and employee benefits
Income tax benefit		(3,194		)		(3,497		)		(1,979		)
		$	(4,906	)		$	(5,366	)		$	(3,050	)
1 Negative reclassification amounts indicate decreases to earnings in the statement of income and increases to balance sheet assets. The opposite applies to positive reclassification amounts.
Deferred Compensation
Deferred compensation consists of invested assets, including the Company’s common stock, which are held in rabbi trusts for certain employees and directors. At both December 31, 2013 and 2012, the cost of the common stock included in retained earnings was approximately $15.0 million. We consolidate the fair value of invested assets of the trusts along with the total obligations and include them in other assets and other liabilities, respectively, in the balance sheet. At December 31, 2013 and 2012, total invested assets were approximately $83.7 million and $72.2 million and total obligations were approximately $98.7 million and $87.2 million, respectively.
Noncontrolling Interests
On June 3, 2013, we removed the entire noncontrolling interest amount of approximately $4.8 million at that time from the Company’s balance sheet following settlement with the remaining owner.

Income_Taxes_Tables

Income Taxes (Tables)	0 Months Ended			12 Months Ended
	Dec. 31, 2013			Dec. 31, 2013
Income Taxes [Abstract]	'			'
Schedule Of Income Taxes (Benefit)	'			'
				(In thousands)	2013			2012			2011
				Federal:
				Current	$	173,418		$	185,404		$	62,810
				Deferred	(51,475		)	(20,086		)	106,902
					121,943			165,318			169,712
				State:
				Current	29,676			(1,775		)	20,169
				Deferred	(8,642		)	29,873			8,702
					21,034			28,098			28,871
					$	142,977		$	193,416		$	198,583
Schedule Of Statutory Federal Income Tax Rate Reconciles To Actual Income Tax Expense (Benefit)	'			'
				(In thousands)	2013			2012			2011
		2013	2012
				Income tax expense at statutory federal rate	$	142,251		$	189,548		$	182,446
	Liability for unrecognized tax benefits contained the amount that, if recognized, would afftet the effective tax rate	1.6	1.6
				State income taxes, net	13,672			18,264			18,766
				Other nondeductible expenses	2,574			11,291			24,361
				Nontaxable income	(17,071		)	(20,137		)	(19,691		)
				Tax credits and other taxes	(2,628		)	(3,172		)	(5,977		)
				Other	4,179			(2,378		)	(1,322		)
					$	142,977		$	193,416		$	198,583
Schedule Of Tax Effects Of Deferred Tax Assets And Deferred Tax Liabilities	'			'
				(In thousands)	December 31,
					2013			2012
				Gross deferred tax assets:
				Book loan loss deduction in excess of tax	$	315,025		$	372,206
				Pension and postretirement	16,380			33,105
				Deferred compensation	85,846			79,921
				Other real estate owned	7,099			16,306
				Security investments and derivative fair value adjustments	155,900			247,770
				Net operating losses, capital losses and tax credits	6,111			36,600
				FDIC-supported transactions	10,488			—
				Other	44,450			42,324
					641,299			828,232
				Valuation allowance	(4,261		)	(4,261		)
				Total deferred tax assets	637,038			823,971
				Gross deferred tax liabilities:
				Core deposits and purchase accounting	(13,556		)	(24,185		)
				Premises and equipment, due to differences in depreciation	(13,014		)	(16,258		)
				FHLB stock dividends	(12,668		)	(13,423		)
				Leasing operations	(94,637		)	(111,265		)
				Prepaid expenses	(8,909		)	(7,057		)
				Prepaid pension reserves	(16,909		)	(18,350		)
				Subordinated debt modification	(148,820		)	(185,733		)
				Deferred loan fees	(21,591		)	(21,209		)
				FDIC-supported transactions	—			(17,957		)
				Other	(2,553		)	(2,929		)
				Total deferred tax liabilities	(332,657		)	(418,366		)
				Net deferred tax assets	$	304,381		$	405,605
Schedule Of Reconciliation Of Gross Unrecognized Tax Benefits	'			'
				(In thousands)	2013			2012			2011
				Balance at beginning of year	$	2,385		$	13,722		$	15,366
				Tax positions related to current year:
				Additions	—			—			—
				Reductions	—			—			—
				Tax positions related to prior years:
				Additions	—			—			—
				Reductions	—			(11,337		)	—
				Settlements with taxing authorities	—			—			—
				Lapses in statutes of limitations	—			—			(1,644		)
				Balance at end of year	$	2,385		$	2,385		$	13,722

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation [Abstract]	'
Compensation Expense And Related Tax Benefit For All Share-Based Awards	'
	(In thousands)		2013				2012		2011
	Compensation expense		$	28,052			$	31,533	$	29,019
	Reduction of income tax expense		9,123				10,724		9,768
Summary Of Stock Option Activity	'
		Number of shares			Weighted average exercise price
	Balance at December 31, 2010	6,369,239			$	47.37
	Granted	800,057			23.46
	Exercised	(46,749	)		13.6
	Expired	(1,080,867	)		57.27
	Forfeited	(107,810	)		22.74
	Balance at December 31, 2011	5,933,870			43.06
	Granted	867,968			18.87
	Exercised	(129,616	)		14.64
	Expired	(568,546	)		61.9
	Forfeited	(141,351	)		21.36
	Balance at December 31, 2012	5,962,325			38.87
	Granted	1,047,781			27.41
	Exercised	(488,479	)		20.11
	Expired	(574,157	)		70.12
	Forfeited	(72,880	)		22.25
	Balance at December 31, 2013	5,874,590			35.54
	Outstanding stock options exercisable as of:
	December 31, 2013	4,101,928			$	40.4
	December 31, 2012	4,379,630			45.26
	December 31, 2011	4,211,216			51.26

Commitments_Guarantees_Conting1

Commitments, Guarantees, Contingent Liabilities, and Related Parties Operating Leases, Future Aggregate Minimum Rental Payments (Tables) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Operating Leased Assets [Line Items]	'
Operating Leases, Future Minimum Payments Due	$337,510
Operating Leases, Future Minimum Payments Due, Next Twelve Months	44,857
Operating Leases, Future Minimum Payments, Due in Two Years	44,815
Operating Leases, Future Minimum Payments, Due in Three Years	42,712
Operating Leases, Future Minimum Payments, Due in Four Years	37,071
Operating Leases, Future Minimum Payments, Due in Five Years	32,186
Operating Leases, Future Minimum Payments, Due Thereafter	$135,869

Regulatory_Matters_Tables

Regulatory Matters (Tables)	12 Months Ended
	Dec. 31, 2013
Regulatory Capital Requirements [Abstract]	'
Summary Of Actual Capital Amounts And Ratios For The Company And Its Three Largest Subsidiary Banks	'
		Actual				To be well capitalized
	(Amounts in thousands)	Amount		Ratio		Amount		Ratio
	As of December 31, 2013:
	Total capital (to risk-weighted assets)
	The Company	$	6,621,539	14.67	%	$	4,514,553	10	%
	Zions First National Bank	1,997,525		14.52		1,375,347		10
	California Bank & Trust	1,252,860		13.65		917,950		10
	Amegy Bank N.A.	1,714,314		14.86		1,153,382		10
	Tier 1 capital (to risk-weighted assets)
	The Company	5,763,463		12.77		2,708,732		6
	Zions First National Bank	1,831,720		13.32		825,208		6
	California Bank & Trust	1,137,848		12.4		550,770		6
	Amegy Bank N.A.	1,569,696		13.61		692,029		6
	Tier 1 capital (to average assets)
	The Company	5,763,463		10.48		na		na 1
	Zions First National Bank	1,831,720		10.02		913,592		5
	California Bank & Trust	1,137,848		10.75		529,067		5
	Amegy Bank N.A.	1,569,696		12.09		649,387		5
	As of December 31, 2012:
	Total capital (to risk-weighted assets)
	The Company	$	6,616,521	15.05	%	$	4,396,983	10	%
	Zions First National Bank	2,034,662		14.17		1,435,690		10
	California Bank & Trust	1,222,822		14.18		862,218		10
	Amegy Bank N.A.	1,598,708		15.17		1,054,110		10
	Tier 1 capital (to risk-weighted assets)
	The Company	5,883,669		13.38		2,638,190		6
	Zions First National Bank	1,861,218		12.96		861,414		6
	California Bank & Trust	1,114,315		12.92		517,331		6
	Amegy Bank N.A.	1,466,001		13.91		632,466		6
	Tier 1 capital (to average assets)
	The Company	5,883,669		10.96		na		na 1
	Zions First National Bank	1,861,218		10.58		879,719		5
	California Bank & Trust	1,114,315		10.37		537,534		5
	Amegy Bank N.A.	1,466,001		12.03		609,319		5

Retirement_Plans_Tables

Retirement Plans (Tables)	3 Months Ended			12 Months Ended
	Mar. 31, 2013			Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]	'			'
Schedule of Defined Benefit Plans Disclosures [Table Text Block]	'			'
	Level 3 - significant input assumptions:	2013	2012
	Composite market value factor:				2013			2012
	Minimum in range	0.988035	1.02972
	Maximum in range	1.073235	1.119776	Profit sharing expense	$	11,804		$	11,783
	Actual at year end	1.05329	1.08063
Schedule Of Amounts In Accumulated Other Comprehensive Income (Loss) Expected To Be Recognized As An Expense Component Of Net Periodic Benefit Cost For The Plans	'			'
				(In thousands)		Pension				Supplemental Retirement				Postretirement
				Net gain (loss)		$	(3,187	)			$	(33	)		$	71
				Prior service credit (cost)		—					(50		)		—
						$	(3,187	)			$	(83	)		$	71
Schedule Of Weighted Average Assumptions Based On The Pension Plan	'			'
					2013			2012			2011
				Used to determine benefit obligation at year-end:
				Discount rate	4.6	%		3.75	%		4.25	%
				Rate of compensation increase 1	na			3.5			3.5
				Used to determine net periodic benefit cost for the years ended December 31:
				Discount rate	3.75			4.25			5.2
				Expected long-term return on plan assets	8			8			8
				Rate of compensation increase	3.5			3.5			3.5

Retirement_Plans_Weighted_aver

Retirement Plans Weighted average assumptions on pension plan (Tables)	12 Months Ended
	Dec. 31, 2013
Weighted average assumptions on pension plan [Abstract]	'
Schedule Of Weighted Average Assumptions Based On The Pension Plan	'
		2013		2012		2011
	Used to determine benefit obligation at year-end:
	Discount rate	4.6	%	3.75	%	4.25	%
	Rate of compensation increase 1	na		3.5		3.5
	Used to determine net periodic benefit cost for the years ended December 31:
	Discount rate	3.75		4.25		5.2
	Expected long-term return on plan assets	8		8		8
	Rate of compensation increase	3.5		3.5		3.5

Fair_Value_Tables

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2013																														Dec. 31, 2012
Fair Value Disclosures [Abstract]	'																														'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Table Text Block]	'																														'
		Level 3 Instruments
		Quantitative information at December 31, 2013
	(Dollar amounts in thousands)	Fair value				Principal valuation techniques		Significant unobservable inputs		Range of inputs
										(% annually)
	Asset-backed securities:
	Trust preferred – predominantly banks	$	921,819			Discounted cash flow		Constant prepayment rate		until 2016 – 5.50% to 20.73%
						Market comparables
										2016 to maturity – 3.0%
								Constant default rate		yr 1 – 0.30% to 1.94%
										yrs 2-5 – 0.49% to 1.14%
										yrs 6 to maturity – 0.58% to 0.65%
								Loss given default		100%
								Loss given deferral		14.39% to 100%
								Discount rate		5.6% to 7.7%
								(spread over forward LIBOR)
	Trust preferred – predominantly insurance	346,390				Discounted cash flow		Constant prepayment rate		until maturity – 5.0%
						Market comparables
								Constant default rate		yr 1 – 0.38% to 1.03%
										yrs 2-5 – 0.53% to 0.89%
										yrs 6 to maturity – 0.50% to 0.55%
								Loss given default		100%
								Loss given deferral		2.18% to 30.13%
								Discount rate		3.72% to 6.49%
								(spread over forward LIBOR)
	Trust preferred – individual banks	22,324				Market comparables		Yield		6.6% to 7.8%
								Price		81.25% to 109.6%
	Trust preferred – real estate investment trust	22,996				Discounted cash flow		Constant prepayment rate		until maturity – 0.0%
						Market comparables
								Constant default rate		yr 1 – 4.1% to 10.6%
										yrs 2-3 – 4.6% to 5.5%
										yrs 4-6 – 1.0%
										yrs 7 to maturity – 0.50%
								Loss given default		60% to 100%
								Discount rate		5.5% to 15%
								(spread over forward LIBOR)
	Other (predominantly ABS CDOs)	25,800				Discounted cash flow		Constant default rate		0.01% to 100%
								Loss given default		70% to 92%
								Discount rate		9% to 22%
								(spread over forward LIBOR)
		Level 3 Instruments
		Quantitative information at December 31, 2012
	(Dollar amounts in thousands)	Fair value				Principal valuation techniques		Significant unobservable inputs		Range of inputs
										(% annually)
	Asset-backed securities:
	Trust preferred – predominantly banks	$	798,458			Discounted cash flow		Constant prepayment rate		until 2016 – 10.0% to 21.24%
						Market comparables
										2016 to maturity – 3.0%
								Constant default rate		yr 1 – 0.30% to 1.97%
										yrs 2-5 – 0.47% to 0.67%
										yrs 6 to maturity – 0.58% to 0.68%
								Loss given default		100%
								Loss given deferral		9.69% to 100%
								Discount rate		7.7% to 13.4%
								(spread over forward LIBOR)
	Trust preferred – predominantly insurance	256,104				Discounted cash flow		Constant prepayment rate		until maturity – 4.5%
						Market comparables
								Constant default rate		yr 1 – 0.30% to 0.32%
										yrs 2-5 – 0.47% to 0.50%
										yrs 6 to maturity – 0.50% to 0.54%
								Loss given default		100%
								Loss given deferral		2.18%
								Discount rate		3.75% to 16.21%
								(spread over forward LIBOR)
Trust preferred – individual banks	20,910				Market comparables		Yield		9.4% to 9.7%
							Price		73.1% to 108.0%
Trust preferred – real estate investment trust	16,403				Discounted cash flow		Constant prepayment rate		until maturity – 0.0%
					Market comparables
							Constant default rate		yr 1 – 5.1% to 8.6%
									yrs 2-3 – 4.2% to 7.1%
									yrs 4-6 – 1.0%
									yrs 7 to maturity – 0.50%
							Loss given default		60% to 100%
							Discount rate		6.5% to 23%
							(spread over forward LIBOR)
Other (predominantly ABS CDOs)	15,160				Discounted cash flow		Constant default rate		0.01% to 100%
							Loss given default		70% to 92%
							Discount rate		9% to 22%
							(spread over forward LIBOR)
Transfers between fair value levels [Table Text Block]	'																														'
		December 31, 2013		December 31, 2012
	Transfers of assets and liabilities occurring among Levels 1, 2 or 3	—		—
		31-Dec-13
		Fair value			Principal valuation techniques		Significant unobservable inputs		Range of inputs
									(% annually)
											Minimum			Maximum			Single Rate
	Trust preferred - predominantly banks	921,819			Discounted Cash flow		Constant prepayment rate		Until 2016		5.5	%		20.73	%
					Market comparables				2016 to maturity								3	%
							Constant default rate		Year 1		0.3	%		1.94	%
									Years 2-5		0.49	%		1.14	%
									Years 6 to maturity		0.58	%		0.65	%
							Loss given default										100	%
							Loss given deferral				14.39	%		100	%
							Discount rate (spread over forward LIBOR)				5.6	%		7.7	%
	Trust preferred - predominantly Insurance	346,390			Discounted cash flow		Constant prepayment rate		Until maturity								5	%
					Market comparables		Constant default rate		Year 1		0.38	%		1.03	%
									Years 2-5		0.53	%		0.89	%
									Years 6 to maturity		0.5	%		0.55	%
							Loss given default										100	%
							Loss given deferral				2.18	%		30.13	%
							Discount rate (spread over forward LIBOR)				3.72	%		6.49	%
	Trust preferred - individual banks	22,323			Market comparables		Yield				6.6	%		7.8	%
							Price				81.25	%		109.6	%
	Trust Preferred - real estate investment trust	22,996			Discounted cash flow		Constant prepayment rate		Until maturity								—	%
					Market comparables		Constant default rate		Year 1		4.1	%		10.6	%
									Years 2-3		4.6	%		5.5	%
									Years 4-6								1	%
									Years 7 to maturity								0.5	%
							Loss given default				60	%		100	%
							Discount rate (spread over forward LIBOR)				5.5	%		15	%
	Other (predominantly ABS CODs)	25,800			Discounted cash flow		Constant prepayment rate				Weighted average life of security
							Constant default rate				0.01	%		100	%
							Loss given default				70	%		92	%
							Discount rate (spread over forward LIBOR)				9	%		22	%
		31-Dec-12
		Fair value			Principal valuation techniques		Significant unobservable inputs		Range of inputs
									(% annually)
											Minimum			Maximum			Single Rate
	Trust preferred - predominantly banks	798,458			Discounted Cash flow		Constant prepayment rate		Until 2016		10	%		21.24	%
					Market comparables				2016 to maturity								3	%
							Constant default rate		Year 1		0.3	%		1.97	%
									Years 2-5		0.47	%		0.67	%
									Years 6 to maturity		0.58	%		0.68	%
							Loss given default										100	%
							Loss given deferral				9.69	%		100	%
							Discount rate (spread over forward LIBOR)				7.7	%		13.4	%
	Trust preferred - predominantly Insurance	256,104			Discounted cash flow		Constant prepayment rate		Until maturity								4.5	%
					Market comparables		Constant default rate		Year 1		0.3	%		0.32	%
									Years 2-5		0.47	%		0.5	%
									Years 6 to maturity		0.5	%		0.54	%
							Loss given default										100	%
							Loss given deferral										2.2	%
							Discount rate (spread over forward LIBOR)				3.75	%		16.21	%
	Trust preferred - individual banks	20,910			Market comparables		Yield				9.4	%		9.7	%
							Price				73.1	%		108	%
	Trust Preferred - real estate investment trust	16,403			Discounted cash flow		Constant prepayment rate		Until maturity								—	%
					Market comparables		Constant default rate		Year 1		5.1	%		8.6	%
									Years 2-3		4.2	%		7.1	%
									Years 4-6								1	%
									Years 7 to maturity								0.5	%
							Loss given default				60	%		100	%
							Discount rate (spread over forward LIBOR)				6.5	%		23	%
	Other (predominantly ABS CODs)	25,800			Discounted cash flow		Constant prepayment rate				Weighted average life of security
						Constant default rate				0.01	%		100	%
						Loss given default				70	%		92	%
						Discount rate (spread over forward LIBOR)				9	%		22	%
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis	'																														'
		December 31, 2013
	(In thousands)	Level 1				Level 2				Level 3				Total
	ASSETS
	Investment securities:
	Available-for-sale:
	U.S. Treasury, agencies and corporations					$	2,059,105							$	2,059,105
	Municipal securities					55,602				$	10,662			66,264
	Asset-backed securities:
	Trust preferred – banks and insurance									1,238,820				1,238,820
	Trust preferred – real estate investment trusts									22,996				22,996
	Auction rate									6,599				6,599
	Other (including ABS CDOs)					2,099				25,800				27,899
	Mutual funds and other	$	259,750			20,453								280,203
		259,750				2,137,259				1,304,877				3,701,886
	Trading account					34,559								34,559
	Other noninterest-bearing investments:
	Bank-owned life insurance					466,428								466,428
	Private equity					4,822				82,410				87,232
	Other assets:
	Derivatives:
	Interest rate related and other					1,100								1,100
	Interest rate swaps for customers					55,447								55,447
	Foreign currency exchange contracts	9,614												9,614
		9,614				56,547								66,161
		$	269,364			$	2,699,615			$	1,387,287			$	4,356,266
	LIABILITIES
	Securities sold, not yet purchased	$	73,606											$	73,606
	Other liabilities:
	Derivatives:
	Interest rate related and other					$	1,004							1,004
	Interest rate swaps for customers					54,688								54,688
	Foreign currency exchange contracts	8,643												8,643
	Total return swap									$	4,062			4,062
		8,643				55,692				4,062				68,397
	Other									241				241
		$	82,249			$	55,692			$	4,303			$	142,244
		December 31, 2012
	(In thousands)	Level 1				Level 2				Level 3				Total
	ASSETS
	Investment securities:
	Available-for-sale:
	U.S. Treasury, agencies and corporations	$	102,982			$	1,692,637							$	1,795,619
	Municipal securities					59,445				$	16,551			75,996
	Asset-backed securities:
	Trust preferred – banks and insurance					121				949,271				949,392
	Trust preferred – real estate investment trusts									16,403				16,403
	Auction rate									6,515				6,515
	Other (including ABS CDOs)					4,214				15,160				19,374
	Mutual funds and other	219,214				8,797								228,011
		322,196				1,765,214				1,003,900				3,091,310
	Trading account					28,290								28,290
	Other noninterest-bearing investments:
	Bank-owned life insurance					455,719								455,719
	Private equity					5,132				64,223				69,355
	Other assets:
	Derivatives:
	Interest rate related and other					2,850								2,850
	Interest rate swaps for customers					79,579								79,579
	Foreign currency exchange contracts	4,404												4,404
		4,404				82,429								86,833
		$	326,600			$	2,336,784			$	1,068,123			$	3,731,507
	LIABILITIES
	Securities sold, not yet purchased	$	26,735											$	26,735
Other liabilities:
Derivatives:
Interest rate related and other					$	1,142							1,142
Interest rate swaps for customers					82,926								82,926
Foreign currency exchange contracts	3,159												3,159
Total return swap									$	5,127			5,127
	3,159				84,068				5,127				92,354
Other									124				124
	$	29,894			$	84,068			$	5,251			$	119,213
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs	'																														'
		Level 3 Instruments
		Year Ended December 31, 2013
	(In thousands)	Municipal				Trust				Trust				Auction				Other				Private			Derivatives			Other
		securities				preferred – banks and insurance				preferred				rate				asset-backed				equity						liabilities
										– REIT												investments
	Balance at December 31, 2012	$	16,551			$	949,271			$	16,403			$	6,515			$	15,160			$	64,223		$	(5,127	)	$	(124	)
	Total net gains (losses) included in:
	Statement of income:
	Accretion of purchase discount on securities available-for-sale	41				3,166				254				3				82
	Dividends and other investment income																					6,662
	Fair value and nonhedge derivative loss																								(21,753		)
	Equity securities gains, net																					3,732
	Fixed income securities gains (losses), net	239				(3,160		)		(201		)						55
	Net impairment losses on investment securities					(136,221		)		(17,430		)						(11,080		)
	Other noninterest expense																											(117		)
	Other comprehensive	1,540				377,357				24,081				81				6,950
	income (loss)
	Purchases																					10,548
	Sales					(66,303		)		(111		)						(1		)		(2,244		)
	Redemptions and paydowns	(7,709		)		(60,989		)										(5,780		)		(511		)	22,818
	Reclassifications					175,699												20,414
	Balance at December 31, 2013	$	10,662			$	1,238,820			$	22,996			$	6,599			$	25,800			$	82,410		$	(4,062	)	$	(241	)
		Level 3 Instruments
		Year Ended December 31, 2012
	(In thousands)	Municipal				Trust				Trust				Auction				Other				Private			Derivatives			Other
		securities				preferred – banks and insurance				preferred				rate				asset-backed				equity						liabilities
										– REIT												investments
	Balance at December 31, 2011	$	17,381			$	929,356			$	18,645			$	70,020			$	43,546			$	62,327		$	(5,422	)	$	(86	)
	Total net gains (losses) included in:
	Statement of income:
	Accretion of purchase discount on securities available-for-sale	102				7,126				224				4				232
	Dividends and other investment income																					10,399
	Fair value and nonhedge derivative loss																								(21,707		)
	Equity securities gains, net																					11,478
	Fixed income securities gains (losses), net	9				20,906								4,161				(5,762		)
	Net impairment losses on investment securities					(96,707		)
	Other noninterest expense																											(38		)
	Other comprehensive	(291		)		218,001				(2,466		)		1,330				8,343
	income (loss)
	Purchases																					9,043
	Sales																					(15,872		)
	Redemptions and paydowns	(650		)		(129,411		)						(69,000		)		(31,199		)		(13,152		)	22,002
	Balance at December 31, 2012	$	16,551			$	949,271			$	16,403			$	6,515			$	15,160			$	64,223		$	(5,127	)	$	(124	)
Schedule Of Realized Gains (Losses) Using Level 3 Inputs	'																														'
	(In thousands)	Year Ended
		December 31,
		2013				2012
	Dividends and other investment income	$	(133	)		$	1,635
	Equity securities gains (losses), net	(2,452		)		10,359
	Fixed income securities gains (losses), net	(3,067		)		19,314
Schedule Of Assets With Fair Value Changes On Nonrecurring Basis	'																														'
	(In thousands)	Fair value at December 31, 2013																Gains (losses) from													(In thousands)	Fair value at December 31, 2012								Gains (losses) from
																		fair value changes														Level 1		Level 2		Level 3		Total		fair value changes Year Ended December 31, 2012
																		Year Ended													ASSETS
		Level 1				Level 2				Level 3				Total				31-Dec-13													HTM securities adjusted for OTTI	$	—	$	—	$	23,524	$	23,524		$	(7,423	)
	ASSETS
	HTM securities adjusted for OTTI	$	—			$	—			$	8,483			$	8,483				$	(403	)										Private equity investments, carried at cost	—		—		13,520		13,520			(2,176		)
	Private equity investments, carried at cost	—				—				13,270				13,270					(5,700		)										Impaired loans	—		44,448		—		44,448			(4,300		)
	Impaired loans	—				11,765				—				11,765					(1,575		)										Other real estate owned	—		58,954		—		58,954			(20,641		)
	Other real estate owned	—				24,684				—				24,684					(13,158		)											$	—	$	103,402	$	37,044	$	140,446		$	(34,540	)
		$	—			$	36,449			$	21,753			$	58,202				$	(20,836	)
Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments	'																														'
		December 31, 2013										December 31, 2012
	(Amounts in thousands)	Carrying				Estimated				Level		Carrying				Estimated				Level
		value				fair value						value				fair value
	Financial assets:
	HTM investment securities	$	588,981			$	609,547			3		$	756,909			$	674,741			3
	Loans and leases (including loans held for sale), net of allowance	38,468,402				38,088,242				3		37,020,811				37,024,198				3
	Financial liabilities:
	Time deposits	2,593,038				2,602,955				2		2,962,931				2,988,714				2
	Foreign deposits	1,980,161				1,979,805				2		1,804,060				1,803,625				2
	Other short-term borrowings	—				—				2		5,409				5,421				2
	Long-term debt (less fair value hedges)	2,269,762				2,423,643				2		2,329,323				2,636,422				2

Operating_Segment_Information_

Operating Segment Information Operating Segment Information (Tables)	12 Months Ended
	Dec. 31, 2013
Operating Segment Information [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	(In millions)	Zions Bank										CB&T												Amegy
		2013			2012			2011				2013				2012				2011				2013				2012				2011
	CONDENSED INCOME STATEMENT
	Net interest income	$	595		$	657.1		$	683.3			$	469			$	466.7			$	506.9			$	381.5			$	371.5			$	391.2
	Provision for loan losses	(40.5		)	88.3			128.3				(16.7		)		(7.9		)		(9.5		)		4.2				(63.9		)		(37.4		)
	Net interest income after provision for loan losses	635.5			568.8			555				485.7				474.6				516.4				377.3				435.4				428.6
	Net impairment losses on investment securities	(7.7		)	(3.2		)	(0.3		)		—				—				(0.5		)		—				—				—
	Loss on sale of investment securities to Parent	—			—			—				—				(9.2		)		(43.9		)		—				—				—
	Other noninterest income	199.9			221.4			219.2				79.3				75.3				105.4				146.4				156.1				138.4
	Noninterest expense	481.4			493.1			547.4				352.4				330.2				355				333.4				340.2				324.9
	Income (loss) before income taxes	346.3			293.9			226.5				212.6				210.5				222.4				190.3				251.3				242.1
	Income tax expense (benefit)	121.7			104.6			76				72.5				83.4				88				59.8				84.6				80.5
	Net income (loss)	$	224.6		$	189.3		$	150.5			$	140.1			$	127.1			$	134.4			$	130.5			$	166.7			$	161.6
	YEAR-END BALANCE SHEET DATA
	Total assets	$	18,590		$	17,930		$	17,531			$	10,923			$	11,069			$	10,894			$	13,705			$	13,119			$	12,282
	Cash and due from banks	363			650			416				157				205				175				437				754				406
	Money market investments	3,888			2,855			2,198				1,108				1,449				1,090				2,551				2,308				2,222
	Total securities	1,520			1,273			1,460				331				350				335				362				439				475
	Total loans	12,259			12,490			12,751				8,574				8,259				8,392				9,217				8,450				8,031
	Total deposits	16,257			15,575			14,905				9,327				9,483				9,192				11,198				10,706				9,731
	Shareholder’s equity:
	Preferred equity	280			280			480				162				162				262				226				251				488
	Common equity	1,523			1,519			1,379				1,342				1,322				1,270				1,845				1,725				1,630
	Noncontrolling interests	—			—			—				—				—				—				—				—				—
	Total shareholder’s equity	1,803			1,799			1,859				1,504				1,484				1,532				2,071				1,976				2,118
	(In millions)											NSB													Vectra
		2013			2012			2011				2013					2012				2011				2013				2012				2011
	CONDENSED INCOME STATEMENT
	Net interest income	$	163		$	167.7		$	172.1			$	113.6		—		$	123.4			$	135			$	102.7			$	108.7			$	104.3
	Provision for loan losses	(15.0		)	(0.6		)	9.6				(12.0		)	—		(9.6		)		(38.3		)		(4.9		)		7				14
	Net interest income after provision for loan losses	178			168.3			162.5				125.6					133				173.3				107.6				101.7				90.3
	Net impairment losses on investment securities	—			—			—				(3.3		)	—		—				—				(0.1		)		(0.6		)		(0.8		)
	Loss on sale of investment securities to Parent	—			—			—				—			—		—				—				—				—				(28.9		)
	Other noninterest income	35			32.1			34.4				37.8			—		33.7				37.4				24.6				25.3				21.7
	Noninterest expense	142.7			152.5			154.7				131.8					133.6				139.3				99.5				98.3				100.7
	Income (loss) before income taxes	70.3			47.9			42.2				28.3					33.1				71.4				32.6				28.1				(18.4		)
	Income tax expense (benefit)	26.4			17			16.7				9.5					11.3				24.8				11.2				9.2				(8.3		)
	Net income (loss)	$	43.9		$	30.9		$	25.5			$	18.8				$	21.8			$	46.6			$	21.4			$	18.9			$	(10.1	)
	YEAR-END BALANCE SHEET DATA
	Total assets	$	4,579		$	4,575		$	4,485			$	3,980				$	4,061			$	4,100			$	2,571			$	2,511			$	2,341
	Cash and due from banks	77			86			71				79					59				73				51				58				55
	Money market investments	220			385			604				710					1,031				905				6				31				52
	Total securities	362			263			271				774					742				748				166				187				227
	Total loans	3,724			3,604			3,304				2,297					2,100				2,235				2,278				2,128				1,914
	Total deposits	3,931			3,874			3,731				3,590					3,604				3,546				2,178				2,164				2,004
	Shareholder’s equity:
	Preferred equity	120			180			305				50					140				260				70				70				70
	Common equity	418			399			350				317					298				273				246				224				200
	Noncontrolling interests	—			—			—				—					—				—				—				—				—
	Total shareholder’s equity	538			579			655				367					438				533				316				294				270
	(In millions)	TCBW											Other												Consolidated Company
		2013			2012			2011					2013				2012				2011				2013				2012				2011
	CONDENSED INCOME STATEMENT
	Net interest income	$	27.3		$	27.4		$	29.6		—		$	(155.8	)		$	(190.6	)		$	(266.2	)		$	1,696.30			$	1,731.90			$	1,756.20
	Provision for loan losses	(1.8		)	0.4			7.8			—		(0.4		)		0.5				—				(87.1		)		14.2				74.5
	Net interest income after provision for	29.1			27			21.8					(155.4		)		(191.1		)		(266.2		)		1,783.40				1,717.70				1,681.70
	loan losses
	Net impairment losses on investment securities	—			—			—			—		(154.0		)		(100.3		)		(32.1		)		(165.1		)		(104.1		)		(33.7		)
	Loss on sale of investment securities to Parent	(2.7		)	—			(4.8		)	—		2.7				9.2				77.6				—				—				—
	Other noninterest income	4.1			3.8			3.5			—		(24.6		)		(23.7		)		(28.1		)		502.5				524				531.9
	Noninterest expense	18.8			18.9			16.7			—		154.4				29.2				19.9				1,714.40				1,596.00				1,658.60
	Income (loss) before income taxes	11.7			11.9			3.8			—		(485.7		)		(335.1		)		(268.7		)		406.4				541.6				521.3
	Income tax expense (benefit)	4			4			1.1			—		(162.2		)		(120.7		)		(80.2		)		142.9				193.4				198.6
Net income (loss)	$	7.7		$	7.9		$	2.7		—		$	(323.5	)		$	(214.4	)		$	(188.5	)		$	263.5			$	348.2			$	322.7
YEAR-END BALANCE SHEET DATA
Total assets	$	943		$	961		$	874		—		$	740			$	1,286			$	642			$	56,031			$	55,512			$	53,149
Cash and due from banks	28			22			28					(17		)		8				—				1,175				1,842				1,224
Money market investments	181			251			143					(207		)		444				(91		)		8,457				8,754				7,123
Total securities	91			104			126					719				519				437				4,325				3,877				4,079
Total loans	630			571			562			—		64				63				69				39,043				37,665				37,258
Total deposits	793			791			693			—		(912		)		(64		)		(926		)		46,362				46,133				42,876
Shareholder’s equity:
Preferred equity	3			3			15			—		93				42				497				1,004				1,128				2,377
Common equity	87			82			75			—		(317		)		(645		)		(569		)		5,461				4,924				4,608
Noncontrolling interests	—			—			—			—		—				(3		)		(2		)		—				(3		)		(2		)
Total shareholder’s equity	90			85			90			—		(224		)		(606		)		(74		)		6,465				6,049				6,983

Parent_Company_Financial_Infor1

Parent Company Financial Information (Tables)	12 Months Ended
	Dec. 31, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Condensed Balance Sheets	'
		December 31,
	(In thousands)	2013			2012
	ASSETS
	Cash and due from banks	$	902,697		$	2,001
	Interest-bearing deposits	72			75,808
	Security resell agreements	—			575,000
	Investment securities:
	Held-to-maturity, at adjusted cost (approximate fair value $31,422 and $22,112)	17,359			22,679
	Available-for-sale, at fair value	675,895			461,665
	Loans, net of allowance for loan losses of $0 and $23	—			1,277
	Other noninterest-bearing investments	37,154			50,799
	Investments in subsidiaries:
	Commercial banks and bank holding company	6,700,315			6,668,881
	Other operating companies	31,535			36,516
	Nonoperating – ZMFU II, Inc.1	44,511			43,012
	Other assets	278,392			311,093
		$	8,687,930		$	8,248,731
	LIABILITIES AND SHAREHOLDERS’ EQUITY
	Other liabilities	$	200,729		$	106,159
	Short-term borrowings:
	Due to others	—			4,951
	Subordinated debt to affiliated trusts	15,464			309,278
	Long-term debt:
	Due to affiliates	17			—
	Due to others	2,007,157			1,776,274
	Total liabilities	2,223,367			2,196,662
	Shareholders’ equity:
	Preferred stock	1,003,970			1,128,302
	Common stock	4,179,024			4,166,109
	Retained earnings	1,473,670			1,203,815
	Accumulated other comprehensive loss	(192,101		)	(446,157		)
	Total shareholders’ equity	6,464,563			6,052,069
		$	8,687,930		$	8,248,731
Condensed Statements Of Income	'
		Year Ended December 31,
	(In thousands)	2013			2012			2011
	Interest income:
	Commercial bank subsidiaries	$	757		$	836		$	2,519
	Other subsidiaries and affiliates	105			386			63
	Loans and securities	17,764			18,993			13,640
	Total interest income	18,626			20,215			16,222
	Interest expense:
	Affiliated trusts	8,483			24,053			24,027
	Other borrowed funds	171,304			195,195			274,843
	Total interest expense	179,787			219,248			298,870
	Net interest loss	(161,161		)	(199,033		)	(282,648		)
	Provision for loan losses	(23		)	(10		)	(38		)
	Net interest loss after provision for loan losses	(161,138		)	(199,023		)	(282,610		)
	Other income:
	Dividends from consolidated subsidiaries:
	Commercial banks and bank holding company	421,406			246,606			71,350
	Other operating companies	200			5,440			14,151
	Nonoperating – ZMFU II, Inc.	—			50,000			—
	Equity and fixed income securities gains (losses), net	(7,332		)	86			426
	Net impairment losses on investment securities	(95,637		)	(74,153		)	(26,810		)
	Other income (loss)	(8,397		)	(6,562		)	4,203
		310,240			221,417			63,320
	Expenses:
	Salaries and employee benefits	26,014			20,507			19,033
	Debt extinguishment cost	120,192			—			—
	Other operating expenses	1,436			395			4,176
		147,642			20,902			23,209
	Income (loss) before income taxes and undistributed	1,460			1,492			(242,499		)
	income/loss of consolidated subsidiaries
	Income tax benefit	(133,798		)	(108,541		)	(104,395		)
	Income (loss) before equity in undistributed income/loss of consolidated subsidiaries	135,258			110,033			(138,104		)
	Equity in undistributed income (loss) of consolidated subsidiaries:
	Commercial banks and bank holding company	132,906			304,559			488,806
	Other operating companies	(4,887		)	(15,561		)	(27,687		)
	Nonoperating – ZMFU II, Inc.	514			(49,515		)	789
	Net income	263,791			349,516			323,804
	Preferred stock dividends	(95,512		)	(170,885		)	(170,414		)
	Preferred stock redemption	125,700			—			—
	Net earnings loss applicable to common shareholders	$	293,979		$	178,631		$	153,390
Condensed Statements Of Cash Flows	'
		Year Ended December 31,
	(In thousands)	2013			2012			2011
	CASH FLOWS FROM OPERATING ACTIVITIES
	Net income	$	263,791		$	349,516		$	323,804
	Adjustments to reconcile net income to net cash provided by (used in) operating activities:
	Undistributed net income of consolidated subsidiaries	(128,533		)	(239,483		)	(461,908		)
	Net impairment losses on investment securities	95,637			74,153			26,810
	Debt Extinguishment cost	120,192			—			—
	Other, net	69,098			4,376			27,505
	Net cash provided by (used in) operating activities	420,185			188,562			(83,789		)
	CASH FLOWS FROM INVESTING ACTIVITIES
	Net decrease (increase) in money market investments	650,736			305,668			(408,811		)
	Collection of advances to subsidiaries	10,000			23,190			6,425
	Advances to subsidiaries	(10,000		)	(23,000		)	(6,250		)
	Proceeds from sales and maturities of investment securities	27,916			5,433			1,259,262
	Purchases of investment securities	(4,858		)	(3,980		)	(575,887		)
	Decrease of investment in subsidiaries	175,000			764,290			113,834
	Other, net	10,642			3,814			9,642
	Net cash provided by investing activities	859,436			1,075,415			398,215
	CASH FLOWS FROM FINANCING ACTIVITIES
	Net change in short-term funds borrowed	(3,368		)	(110,995		)	(165,500		)
	Proceeds from issuance of long-term debt	646,408			757,610			101,821
	Repayments of long-term debt	(835,031		)	(372,312		)	(117,975		)
	Debt extinguishment cost paid	(45,812		)	—			—
	Proceeds from issuance of preferred stock	784,318			141,342			—
	Proceeds from issuance of common stock	9,825			1,898			25,686
	Cash paid for preferred stock redemptions	(799,468		)	(1,542,500		)	—
	Dividends paid on preferred stock	(95,512		)	(126,189		)	(148,774		)
	Dividends paid on common stock	(24,148		)	(7,392		)	(7,361		)
	Other, net	(16,137		)	(3,449		)	(4,160		)
	Net cash used in financing activities	(378,925		)	(1,261,987		)	(316,263		)
	Net increase (decrease) in cash and due from banks	900,696			1,990			(1,837		)
	Cash and due from banks at beginning of year	2,001			11			1,848
	Cash and due from banks at end of year	$	902,697		$	2,001		$	11

Summary_Of_Significant_Account2

Summary Of Significant Accounting Policies (Details) (USD $)	0 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Number of States in which Entity Operates	10	'	10	'
Increase in other service charges, commissions and fees from reclassification of credit card interchange fees	'	'	'	$16,300,000
Percentage of ownership in equity investments (greater than)	20.00%	'	20.00%	'
Security resell agreements maturity days	30	'	'	'
Security resell agreements maximum amount, outstanding	2,300,000,000	'	2,300,000,000	'
Percentage of acquired assets and all assumed liabilities recognized in business combination	'	100.00%	'	'
Estimated useful lives of core deposit assets and other intangibles (in years)	'12 years	'	'	'
Unconsolidated subsidiaries accounted for under the cost, fair value, or equity method when ownerhsip is less than	20.00%	'	20.00%	'
Decrease in interest and fees on loans from reclassification of credit card interchange fees	'	'	'	16,300,000
Number of variable interest entities consolidated	0	'	0	'
Security resell agreements average amount	'	'	$675,000,000	'
Minimum [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'25 years	'	'	'
Minimum [Member] | Furniture And Equipment [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'3 years	'	'	'
Minimum [Member] | Software License Arrangement [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'3 years	'	'	'
Minimum [Member] | New Lending and Deposit System Software [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'10 years	'	'	'
Maximum [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'40 years	'	'	'
Maximum [Member] | Furniture And Equipment [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'10 years	'	'	'
Maximum [Member] | Software License Arrangement [Member]	'	'	'	'
New Accounting Pronouncements or Change in Accounting Principle [Line Items]	'	'	'	'
Estimated useful lives of properties, Minimum (in years)	'5 years	'	'	'

Merger_And_Acquisition_Activit1

Merger And Acquisition Activity (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Business Acquisition [Line Items]	'	'	'
Recognized gain on sale of stock	$8,520	$11,253	$6,511
Dba BankServ [Member]	'	'	'
Business Acquisition [Line Items]	'	'	'
Recognized gain on sale of stock	'	'	$5,500

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Schedule Of Noncash Activities) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information [Abstract]	'	'	'
Real Estate Owned, Transfer to Real Estate Owned	$60,749	$172,018	$301,454
Transfer of Portfolio Loans and Leases to Held-for-sale	36,301	0	31,936
Transfer of beneficial conversion feature from common stock to preferred stock	206	15,232	43,139
Subordinated debt converted to preferred stock	1,210	89,564	256,109
PreferredStockTransferredToCommonStockAsAAresultOfPreferredStockRedeumption	580	0	0
PreferredStockTransferredToRetainedEarningsAsAResultOfPreferredStockRedemption	125,700	0	0
Amortized Cost of Securities Reclassified from HTM to AFS	$181,915	$0	$0

Cash_and_Money_Market_Investme1

Cash and Money Market Investments Cash and Money Market Investments (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Gain (Loss) on Investments [Line Items]	'	'
Derivative Liability, Fair Value, Gross Liability	$68,400	'
Assets [Member] | Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	282,248	3,675,354
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	282,248	2,775,354
Gross amounts not offset in the balance sheet	0	0
Net amount	282,248	2,775,354
Assets [Member] | Assets, Total [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	347,931	3,761,568
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	347,931	2,861,568
Gross amounts not offset in the balance sheet	2,210	0
Net amount	338,491	2,861,159
Assets [Member] | Derivative Assets Included In Other Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	65,683	86,214
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	65,683	86,214
Gross amounts not offset in the balance sheet	2,210	0
Net amount	56,243	85,805
Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Derivative Liability, Fair Value, Gross Liability	68,397	92,259
Other Liabilities [Member] | Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	266,742	1,220,478
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	266,742	320,478
Gross amounts not offset in the balance sheet	0	0
Net amount	266,742	320,478
Other Liabilities [Member] | Liabilities, Total [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	335,139	1,312,737
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	335,139	412,737
Gross amounts not offset in the balance sheet	-26,997	-81,683
Net amount	296,492	330,645
Other Liabilities [Member] | Derivative Liabilities Included Other liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	68,397	92,259
Gross amounts not offset in the balance sheet	-26,997	-81,683
Net amount	29,750	10,167
Derivative Liability, Fair Value, Gross Liability	68,397	92,259
Financial Instruments [Domain] | Assets [Member] | Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Financial Instruments [Domain] | Assets [Member] | Assets, Total [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-11,650	-409
Financial Instruments [Domain] | Assets [Member] | Derivative Assets Included In Other Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-11,650	-409
Financial Instruments [Domain] | Other Liabilities [Member] | Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Financial Instruments [Domain] | Other Liabilities [Member] | Liabilities, Total [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-11,650	-409
Financial Instruments [Domain] | Other Liabilities [Member] | Derivative Liabilities Included Other liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	($11,650)	($409)

Investment_Securities_Narrativ

Investment Securities (Narrative) (Details) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Feb. 12, 2014	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
		Securities	Securities	Securities
Investment [Line Items]	'	'	'	'	'
Other than temporary impairment on municipal securiries during the period	'	'	$0	'	'
Number of HTM investment securities in an unrealized loss position	'	157	157	84	'
Number of AFS investment securities in an unrealized loss position	'	317	317	256	'
Amortized Cost of Securities Reclassified from HTM to AFS	'	'	181,915,000	0	0
Unrealized losses recorded in AOCI as a result of HTM securities transfered to AFS securities	'	24,400,000	'	'	'
Certain Disallowed Insurance CDO Securities	'	358,203,000	358,203,000	'	'
Unrealized Losses on Certain Disallowed Insurance CDO Securities	'	'	67,000,000	'	'
Amortized Cost of Disallowed CDOs With Unlikely Recovery	'	147,000,000	147,000,000	'	'
Asset Impairment Charges	'	'	165,134,000	106,545,000	35,686,000
Nontaxable interest income on securities	'	'	13,400,000	17,600,000	21,300,000
Carrying value of pledged securities	'	1,000,000,000	1,000,000,000	1,000,000,000	'
Other than temporary impairment on U.S. government agencies and corporation recorded in the perion	'	'	0	'	'
Proceeds from Sale of Available-for-sale Securities, Debt	347,000,000	'	'	'	'
Par Value of CDO Securities Sold	631,000,000	'	'	'	'
Available-for-sale Securities, Amortized Cost Basis	282,000,000	3,949,230,000	3,949,230,000	3,716,949,000	'
Available-for-sale Securities, Gross Realized Gains	65,000,000	'	'	'	'
Small Business Administration Loan-Backed Securities [Member] | Minimum [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Investment term of maturity, in years	'	'	5	'	'
Small Business Administration Loan-Backed Securities [Member] | Maximum [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Investment term of maturity, in years	'	'	25	'	'
Municipal Securities [Member] | Minimum [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Investment term of maturity, in years	'	'	1	'	'
Municipal Securities [Member] | Maximum [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Investment term of maturity, in years	'	'	25	'	'
CDO Trust Preferred Securities [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Asset Impairment Charges	'	'	137,100,000	'	'
Volcker Rule and Interim Final Rule [Member] | CDO Trust Preferred Securities [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Asset Impairment Charges	'	'	43,200,000	'	'
Company Has Intention to Sell Due to Volcker Rule and Interim Final Rule [Member] | CDO Trust Preferred Securities [Member]	'	'	'	'	'
Investment [Line Items]	'	'	'	'	'
Asset Impairment Charges	'	'	$93,900,000	'	'

Investment_Securities_Summary_

Investment Securities (Summary Of Investment Securities) (Details) (USD $)	0 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Feb. 12, 2014
Investment [Line Items]	'		'		'
Held-to-maturity Securities, Unrecognized Holding Loss	$5,924		$95,828		'
Held-to-maturity, fair value	609,547		674,741		'
Held To Maturity Securities Gross Unrealized Losses	41,593	[1]	45,434	[1]	'
Held-to-maturity, Amortized cost	630,574		802,343		'
Held To Maturity Securities Gross Unrealized Gains	0	[1]	0	[1]	'
Available-for-sale debt securities, Amortized cost	3,661,627		'		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	48,324	[1]	'		'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	288,268	[1]	'		'
Available-for-sale debt securities, Carrying value	3,421,683		'		'
Available-for-sale debt securities, Estimated fair value	3,421,683		2,863,299		'
Available-for-sale equity securities, Amortized cost	'		3,488,480		'
Available-for-sale equity securities, Gross unrealized gains, Recognized in OCI	'		72,102	[1]	'
Available-for-sale equity securities, Gross unrealized losses, Recognized in OCI	'		697,283	[1]	'
Available-for-sale equity securities, Carrying value	'		2,863,299		'
Available-for-sale, at fair value	3,701,886		3,091,310		'
Available-for-sale Securities, Amortized Cost Basis	3,949,230		3,716,949		282,000
Available-for-sale, Gross unrealized gains, Recognized in OCI	48,345	[1]	72,296	[1]	'
Available-for-sale, Gross unrealized losses, Recognized in OCI	295,689	[1]	697,935	[1]	'
Available-for-sale, Carrying value	3,701,886		3,091,310		'
amortized cost of investment securities	4,579,804		4,519,292		'
Gross Unrealized Gains of Investment Securities Recognized in OCI	48,345		72,296		'
Gross Unrealized Losses of Investment Securities Recognized in OCI	337,282		743,369		'
Carrying Value of Investment Securities	4,290,867		3,848,219		'
Estimated Fair Value of Investment Securities	4,311,433		3,766,051		'
Held-to-maturity Securities	588,981		756,909		'
Held-to-maturity Securities, Unrecognized Holding Gain	26,490		13,660		'
Municipal Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Held-to-maturity Securities, Unrecognized Holding Loss	4,616		709		'
Held-to-maturity, fair value	557,734		536,866		'
Held To Maturity Securities Gross Unrealized Losses	0	[1]	0	[1]	'
Held-to-maturity, Amortized cost	551,055		524,738		'
Held To Maturity Securities Gross Unrealized Gains	0	[1]	0	[1]	'
Available-for-sale debt securities, Amortized cost	65,425		75,344		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	1,329	[1]	2,622	[1]	'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	490	[1]	1,970	[1]	'
Available-for-sale debt securities, Carrying value	66,264		75,996		'
Available-for-sale debt securities, Estimated fair value	66,264		75,996		'
Held-to-maturity Securities	551,055		524,738		'
Held-to-maturity Securities, Unrecognized Holding Gain	11,295		12,837		'
Trust Preferred Securities - Banks And Insurance [Member] | Asset-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Held-to-maturity Securities, Unrecognized Holding Loss	1,308		86,596		'
Held-to-maturity, fair value	51,713		126,201		'
Held To Maturity Securities Gross Unrealized Losses	41,593	[1]	42,964	[1]	'
Held-to-maturity, Amortized cost	79,419		255,647		'
Held To Maturity Securities Gross Unrealized Gains	0	[1]	0	[1]	'
Available-for-sale debt securities, Amortized cost	1,508,224		'		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	13,439	[1]	'		'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	282,843	[1]	'		'
Available-for-sale debt securities, Carrying value	1,238,820		'		'
Available-for-sale debt securities, Estimated fair value	1,238,820		'		'
Available-for-sale equity securities, Amortized cost	'		1,596,156		'
Available-for-sale equity securities, Gross unrealized gains, Recognized in OCI	'		16,687	[1]	'
Available-for-sale equity securities, Gross unrealized losses, Recognized in OCI	'		663,451	[1]	'
Available-for-sale equity securities, Carrying value	'		949,392		'
Available-for-sale, at fair value	'		949,392		'
Held-to-maturity Securities	37,826		212,683		'
Held-to-maturity Securities, Unrecognized Holding Gain	15,195		114		'
Other [Member] | Asset-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Held-to-maturity Securities, Unrecognized Holding Loss	0		8,523		'
Held-to-maturity, fair value	0		11,574		'
Held To Maturity Securities Gross Unrealized Losses	0	[1]	2,470	[1]	'
Held-to-maturity, Amortized cost	0		21,858		'
Held To Maturity Securities Gross Unrealized Gains	0	[1]	0	[1]	'
Available-for-sale debt securities, Amortized cost	27,540		'		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	359	[1]	'		'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	0	[1]	'		'
Available-for-sale debt securities, Carrying value	27,899		'		'
Available-for-sale debt securities, Estimated fair value	27,899		'		'
Available-for-sale equity securities, Amortized cost	'		25,614		'
Available-for-sale equity securities, Gross unrealized gains, Recognized in OCI	'		701	[1]	'
Available-for-sale equity securities, Gross unrealized losses, Recognized in OCI	'		6,941	[1]	'
Available-for-sale equity securities, Carrying value	'		19,374		'
Available-for-sale, at fair value	'		19,374		'
Held-to-maturity Securities	0		19,388		'
Held-to-maturity Securities, Unrecognized Holding Gain	0		709		'
Other Debt Securities [Member] | Asset-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Held-to-maturity Securities, Unrecognized Holding Loss	0		0		'
Held-to-maturity, fair value	100		100		'
Held To Maturity Securities Gross Unrealized Losses	0	[1]	0	[1]	'
Held-to-maturity, Amortized cost	100		100		'
Held To Maturity Securities Gross Unrealized Gains	0	[1]	0	[1]	'
Held-to-maturity Securities	100		100		'
Held-to-maturity Securities, Unrecognized Holding Gain	0		0		'
U.S. Treasury Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale debt securities, Amortized cost	1,442		104,313		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	104	[1]	211	[1]	'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	0	[1]	0	[1]	'
Available-for-sale debt securities, Carrying value	1,546		104,524		'
Available-for-sale debt securities, Estimated fair value	1,546		104,524		'
Agency Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale debt securities, Amortized cost	517,905		108,814		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	1,920	[1]	3,959	[1]	'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	901	[1]	116	[1]	'
Available-for-sale debt securities, Carrying value	518,924		112,657		'
Available-for-sale debt securities, Estimated fair value	518,924		112,657		'
Agency Guaranteed Mortgage-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale debt securities, Amortized cost	308,687		406,928		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	9,926	[1]	18,598	[1]	'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	1,237	[1]	16	[1]	'
Available-for-sale debt securities, Carrying value	317,376		425,510		'
Available-for-sale debt securities, Estimated fair value	317,376		425,510		'
Small Business Administration Loan-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale debt securities, Amortized cost	1,202,901		1,124,322		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	21,129	[1]	29,245	[1]	'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	2,771	[1]	639	[1]	'
Available-for-sale debt securities, Carrying value	1,221,259		1,152,928		'
Available-for-sale debt securities, Estimated fair value	1,221,259		1,152,928		'
Trust Preferred Securities - Real Estate Investment Trusts [Member] | Asset-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale debt securities, Amortized cost	22,996		'		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	0	[1]	'		'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	0	[1]	'		'
Available-for-sale debt securities, Carrying value	22,996		'		'
Available-for-sale debt securities, Estimated fair value	22,996		'		'
Available-for-sale equity securities, Amortized cost	'		40,485		'
Available-for-sale equity securities, Gross unrealized gains, Recognized in OCI	'		0	[1]	'
Available-for-sale equity securities, Gross unrealized losses, Recognized in OCI	'		24,082	[1]	'
Available-for-sale equity securities, Carrying value	'		16,403		'
Available-for-sale, at fair value	'		16,403		'
Auction Rate Securities [Member] | Asset-Backed Securities [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale debt securities, Amortized cost	6,507		'		'
Available-for-sale debt securities, Gross unrealized gains, Recognized in OCI	118	[1]	'		'
Available-for-sale debt securities, Gross unrealized losses, Recognized in OCI	26	[1]	'		'
Available-for-sale debt securities, Carrying value	6,599		'		'
Available-for-sale debt securities, Estimated fair value	6,599		'		'
Available-for-sale equity securities, Amortized cost	'		6,504		'
Available-for-sale equity securities, Gross unrealized gains, Recognized in OCI	'		79	[1]	'
Available-for-sale equity securities, Gross unrealized losses, Recognized in OCI	'		68	[1]	'
Available-for-sale equity securities, Carrying value	'		6,515		'
Available-for-sale, at fair value	'		6,515		'
Mutual Funds And Other [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale, at fair value	'		228,011		'
Available-for-sale Securities, Amortized Cost Basis	'		228,469		'
Available-for-sale, Gross unrealized gains, Recognized in OCI	'		194	[1]	'
Available-for-sale, Gross unrealized losses, Recognized in OCI	'		652	[1]	'
Available-for-sale, Carrying value	'		228,011		'
Mutual Funds And Stock [Member]	'		'		'
Investment [Line Items]	'		'		'
Available-for-sale, at fair value	280,203		'		'
Available-for-sale Securities, Amortized Cost Basis	287,603		'		'
Available-for-sale, Gross unrealized gains, Recognized in OCI	21	[1]	'		'
Available-for-sale, Gross unrealized losses, Recognized in OCI	7,421	[1]	'		'
Available-for-sale, Carrying value	$280,203		'		'
[1]	The gross unrealized losses recognized in OCI on HTM securities resulted from a previous transfer of AFS securitiesto HTM

Investment_Securities_Contract

Investment Securities (Contractual Maturities Debt Securities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investments [Abstract]	'	'
Held-to-maturity, Due in one year or less, Amortized cost	$53,489	'
Held-to-maturity, Due in one year or less, Estimated fair value	53,200	'
Held-to-maturity, Due after one year through five years, Amortized cost	197,830	'
Held-to-maturity, Due after one year through five years, Estimated fair value	202,553	'
Held-to-maturity, Due after five years through ten years, Amortized cost	136,754	'
Held-to-maturity, Due after five years through ten years, Estimated fair value	134,360	'
Held-to-maturity, Due after ten years, Amortized cost	242,501	'
Held-to-maturity, Due after ten years, Estimated fair value	219,434	'
Held-to-maturity, Amortized cost	630,574	802,343
Held-to-maturity, fair value	609,547	674,741
Available-for-sale, Due in one year or less, Amortized cost	446,742	'
Available-for-sale, Due in one year or less, Estimated fair value	434,528	'
Available-for-sale, Due after one year through five years, Amortized cost	1,151,262	'
Available-for-sale, Due after one year through five years, Estimated fair value	1,126,669	'
Available-for-sale, Due after five years through ten years, Amortized cost	724,261	'
Available-for-sale, Due after five years through ten years, Estimated fair value	702,395	'
Available-for-sale, Due after ten years, Amortized cost	1,339,362	'
Available-for-sale, Due after ten years, Estimated fair value	1,158,091	'
Available-for-sale, Amortized cost	3,661,627	'
Available-for-sale, Estimated fair value	$3,421,683	$2,863,299

Investment_Securities_Summary_1

Investment Securities (Summary Of Amount Of Gross Unrealized Losses For Debt Securities And Estimated Fair Value) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	$7,328	$849
Available-for-sale, Less than 12 months - Estimated fair value	386,486	157,086
Available-for-sale, 12 months or more - Gross unrealized losses	288,361	697,086
Available-for-sale, 12 months or more - Estimated fair value	1,001,740	887,841
Available-for-sale, Total - Gross unrealized losses	295,689	697,935
Available-for-sale, Total - Estimated fair value	1,388,226	1,044,927
Investment Securities Gross Unrealized Losses Less Than 12 Months	11,353	1,479
Investment Securities Estimated Fair Value Less Than 12 Months	456,886	199,699
Investment Securities Gross Unrealized Losses 12 Months or More	331,853	837,718
Investment Securities Estimated Fair Value 12 Months or More	1,062,162	1,030,674
Investment Securities Gross Unrealized Losses Total	343,206	839,197
Investment Securities Estimated Fair Value Total	1,519,048	1,230,373
Municipal Securities [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	4,025	630
Held-to-maturity, Less than 12 months - Estimated fair value	70,400	42,613
Held-to-maturity, 12 months or more - Gross unrealized losses	591	79
Held-to-maturity, 12 months or more - Estimated fair value	9,103	5,910
Held-to-maturity, Total - Gross unrealized losses	4,616	709
Held-to-maturity, Total - Estimated fair value	79,503	48,523
Available-for-sale, Less than 12 months - Gross unrealized losses	73	61
Available-for-sale, Less than 12 months - Estimated fair value	8,834	4,898
Available-for-sale, 12 months or more - Gross unrealized losses	417	1,909
Available-for-sale, 12 months or more - Estimated fair value	3,179	11,768
Available-for-sale, Total - Gross unrealized losses	490	1,970
Available-for-sale, Total - Estimated fair value	12,013	16,666
Agency Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	828	35
Available-for-sale, Less than 12 months - Estimated fair value	47,862	18,633
Available-for-sale, 12 months or more - Gross unrealized losses	73	81
Available-for-sale, 12 months or more - Estimated fair value	5,874	6,916
Available-for-sale, Total - Gross unrealized losses	901	116
Available-for-sale, Total - Estimated fair value	53,736	25,549
Agency Guaranteed Mortgage-Backed Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	1,231	10
Available-for-sale, Less than 12 months - Estimated fair value	64,533	6,032
Available-for-sale, 12 months or more - Gross unrealized losses	6	6
Available-for-sale, 12 months or more - Estimated fair value	935	629
Available-for-sale, Total - Gross unrealized losses	1,237	16
Available-for-sale, Total - Estimated fair value	65,468	6,661
Small Business Administration Loan-Backed Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	1,709	91
Available-for-sale, Less than 12 months - Estimated fair value	187,680	15,199
Available-for-sale, 12 months or more - Gross unrealized losses	1,062	548
Available-for-sale, 12 months or more - Estimated fair value	39,256	69,011
Available-for-sale, Total - Gross unrealized losses	2,771	639
Available-for-sale, Total - Estimated fair value	226,936	84,210
Mutual Funds And Other [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	943	652
Available-for-sale, Less than 12 months - Estimated fair value	24,057	112,324
Available-for-sale, 12 months or more - Gross unrealized losses	6,478	0
Available-for-sale, 12 months or more - Estimated fair value	103,614	0
Available-for-sale, Total - Gross unrealized losses	7,421	652
Available-for-sale, Total - Estimated fair value	127,671	112,324
Held-To-Maturity [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	4,025	630
Held-to-maturity, Less than 12 months - Estimated fair value	70,400	42,613
Held-to-maturity, 12 months or more - Gross unrealized losses	43,492	140,632
Held-to-maturity, 12 months or more - Estimated fair value	60,422	142,833
Held-to-maturity, Total - Gross unrealized losses	47,517	141,262
Held-to-maturity, Total - Estimated fair value	130,822	185,446
Available-for-sale Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	6,385	197
Available-for-sale, Less than 12 months - Estimated fair value	362,429	44,762
Available-for-sale, 12 months or more - Gross unrealized losses	281,883	697,086
Available-for-sale, 12 months or more - Estimated fair value	898,126	887,841
Available-for-sale, Total - Gross unrealized losses	288,268	697,283
Available-for-sale, Total - Estimated fair value	1,260,555	932,603
Asset-Backed Securities [Member] | Trust Preferred Securities - Banks And Insurance [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	0	0
Held-to-maturity, Less than 12 months - Estimated fair value	0	0
Held-to-maturity, 12 months or more - Gross unrealized losses	42,901	129,560
Held-to-maturity, 12 months or more - Estimated fair value	51,319	126,019
Held-to-maturity, Total - Gross unrealized losses	42,901	129,560
Held-to-maturity, Total - Estimated fair value	51,319	126,019
Available-for-sale, Less than 12 months - Gross unrealized losses	2,539	0
Available-for-sale, Less than 12 months - Estimated fair value	51,911	0
Available-for-sale, 12 months or more - Gross unrealized losses	280,304	663,451
Available-for-sale, 12 months or more - Estimated fair value	847,990	765,421
Available-for-sale, Total - Gross unrealized losses	282,843	663,451
Available-for-sale, Total - Estimated fair value	899,901	765,421
Asset-Backed Securities [Member] | Other [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	0	0
Held-to-maturity, Less than 12 months - Estimated fair value	0	0
Held-to-maturity, 12 months or more - Gross unrealized losses	0	10,993
Held-to-maturity, 12 months or more - Estimated fair value	0	10,904
Held-to-maturity, Total - Gross unrealized losses	0	10,993
Held-to-maturity, Total - Estimated fair value	0	10,904
Available-for-sale, Less than 12 months - Gross unrealized losses	0	0
Available-for-sale, Less than 12 months - Estimated fair value	0	0
Available-for-sale, 12 months or more - Gross unrealized losses	0	6,941
Available-for-sale, 12 months or more - Estimated fair value	0	15,234
Available-for-sale, Total - Gross unrealized losses	0	6,941
Available-for-sale, Total - Estimated fair value	0	15,234
Asset-Backed Securities [Member] | Other Debt Securities [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	'	0
Held-to-maturity, Less than 12 months - Estimated fair value	'	0
Held-to-maturity, 12 months or more - Gross unrealized losses	'	0
Held-to-maturity, 12 months or more - Estimated fair value	'	0
Held-to-maturity, Total - Gross unrealized losses	'	0
Held-to-maturity, Total - Estimated fair value	'	0
Asset-Backed Securities [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	0	0
Available-for-sale, Less than 12 months - Estimated fair value	0	0
Available-for-sale, 12 months or more - Gross unrealized losses	0	24,082
Available-for-sale, 12 months or more - Estimated fair value	0	16,403
Available-for-sale, Total - Gross unrealized losses	0	24,082
Available-for-sale, Total - Estimated fair value	0	16,403
Asset-Backed Securities [Member] | Auction Rate Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	5	0
Available-for-sale, Less than 12 months - Estimated fair value	1,609	0
Available-for-sale, 12 months or more - Gross unrealized losses	21	68
Available-for-sale, 12 months or more - Estimated fair value	892	2,459
Available-for-sale, Total - Gross unrealized losses	26	68
Available-for-sale, Total - Estimated fair value	$2,501	$2,459

Investment_Securities_Rollforw

Investment Securities (Rollforward Of Total Amount Of Credit-Related OTTI) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Investment [Line Items]	'		'
Balance of credit-related OTTI at beginning of period	($408,043)		($320,986)
Credit-related OTTI not previously recognized	-571	[1]	-8,544	[1]
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	-27,482	[2]	-95,517	[2]
Subtotal of amounts recognized in earnings	28,053		104,061
HTM Securities Transfered to AFS Securities	0		0
Reductions for securities sold during the period	47,768		17,004
Balance of credit-related OTTI at end of period	-185,885		-408,043
Reductions for Securities the Company Intends to Sell or Will be Required to Sell Before Recovery of Amortized Cost Basis	202,443		0
Held-To-Maturity [Member]	'		'
Investment [Line Items]	'		'
Balance of credit-related OTTI at beginning of period	-13,549		-6,126
Credit-related OTTI not previously recognized	-403	[1]	-2,890	[1]
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	0	[2]	-4,533	[2]
Subtotal of amounts recognized in earnings	403		7,423
HTM Securities Transfered to AFS Securities	4,900		0
Reductions for securities sold during the period	0		0
Balance of credit-related OTTI at end of period	-9,052		-13,549
Reductions for Securities the Company Intends to Sell or Will be Required to Sell Before Recovery of Amortized Cost Basis	0		0
Available-for-sale Securities [Member]	'		'
Investment [Line Items]	'		'
Balance of credit-related OTTI at beginning of period	-394,494		-314,860
Credit-related OTTI not previously recognized	-168	[1]	-5,654	[1]
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	-27,482	[2]	-90,984	[2]
Subtotal of amounts recognized in earnings	27,650		96,638
HTM Securities Transfered to AFS Securities	-4,900		0
Reductions for securities sold during the period	47,768		17,004
Balance of credit-related OTTI at end of period	-176,833		-394,494
Reductions for Securities the Company Intends to Sell or Will be Required to Sell Before Recovery of Amortized Cost Basis	$202,443		$0
[1]	Relates to securities not previously impaired.
[2]	Relates to additional impairment on securities previously impaired.

Investment_Securities_Noncredi

Investment Securities Noncredit Related Other Than Temporary Impairment (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Noncredit Related Losses On Securities Not Expected To Be Sold [Line Items]	'	'	'
Noncredit-related losses on securities not expected to be sold (recognized in other comprehensive income)	$23,472	$62,196	$43,642
Held-to-maturity Securities [Member]	'	'	'
Noncredit Related Losses On Securities Not Expected To Be Sold [Line Items]	'	'	'
Noncredit-related losses on securities not expected to be sold (recognized in other comprehensive income)	16,114	16,718	20,945
Available-for-sale Securities [Member]	'	'	'
Noncredit Related Losses On Securities Not Expected To Be Sold [Line Items]	'	'	'
Noncredit-related losses on securities not expected to be sold (recognized in other comprehensive income)	$7,358	$45,478	$22,697

Investment_Securities_Gains_An

Investment Securities (Gains And Losses, Including OTTI, Recognized In Statement Of Income) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Noncredit Related Losses On Securities Not Expected To Be Sold [Line Items]	$23,472	$62,196	$43,642
Investment securities, Held-to-maturity, Gross gains	81	214	229
Investment securities Held-to-maturity, Gross losses	403	7,423	769
Investment securities, Available-for-sale, Gross gains	13,881	25,120	21,793
Investment securities, Available-for-sale, Gross losses	181,591	102,428	43,068
Other noninterest-bearing investments, Nonmarketable equity securities, Gross gains	10,182	23,218	9,449
Other noninterest-bearing investments, Nonmarketable equity securities, Gross losses	1,662	11,965	2,938
Total investment securities and other noninterest-bearing investments, Gross gains	24,144	48,552	31,471
Total investment securities and other noninterest-bearing investments, Gross losses	183,656	121,816	46,775
Net losses	-159,512	-73,264	-15,304
Net impairment losses on investment securities	-165,134	-104,061	-33,683
Equity securities gains (losses)	8,520	11,253	6,511
Fixed income securities gains (losses), net	-2,898	19,544	11,868
Available-for-sale Securities [Member]	'	'	'
Schedule of Trading Securities and Other Trading Assets [Line Items]	'	'	'
Noncredit Related Losses On Securities Not Expected To Be Sold [Line Items]	$7,358	$45,478	$22,697

Loans_And_Allowance_For_Credit2

Loans And Allowance For Credit Losses (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
			Y
			D
			Payments
			M
			Billing_Cycles
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
ALLL Reclassification of Commercial to Commercial Real Estate Loans	'	'	'	$83,200,000	'
Loans Receivable Commercial Construction and Land Development	'	'	561,258,000	787,556,000	'
Impaired Financing Receivable, Recorded Investment	'	'	924,553,000	1,325,838,000	'
Loans Pledged as Collateral	'	'	23,000,000,000	21,100,000,000	'
Unearned income and fees, net of related costs	'	'	141,700,000	137,500,000	'
Owner occupied and commercial real estate loans, unamortized premiums	'	'	47,200,000	59,300,000	'
Principle amount of loans held for sale sold	'	'	1,600,000,000	1,700,000,000	1,600,000,000
Additions to Loans Held For Sale	'	'	1,500,000,000	1,700,000,000	1,600,000,000
Income from loans sold, excluding servicing	'	'	24,100,000	30,700,000	17,500,000
Number of days for consumer loans to be charged off	'	'	180	'	'
Number of days for closed-end loans to be charged off	'	'	120	'	'
Provision for Unfunded Lending Commitments	18,400,000	'	'	'	'
Decrease in classified loan commitments	137,000,000	'	'	'	'
Look back period for commercial and CRE	'	60	'	'	'
Minimum number of days past due for nonaccrual status	'	'	90	'	'
Minimum number of monthly payments in arrears when reporting past due	'	'	2	'	'
Minimum number of billing cycles in arrears when reported as past due	'	'	2	'	'
Minimum number of days unpaid when reported as past due	'	'	30	'	'
Maximum loan amount for internally assigned loan grades	'	'	750,000	'	'
Threshold for nonaccrual loans for evaluation of impairment	'	'	1,000,000	'	'
Minimum number of months for borrower to meet terms For TDR status	'	'	6	'	'
Unused commitments to extend credit on TDR loans	'	'	6,000,000	13,000,000	'
Recorded investment in TDR loans modified with interest rates below market	'	'	172,600,000	225,600,000	'
Loans modified as troubled debt restructuring loans	'	'	155,800,000	174,000,000	'
Net carrying amount of certain PCI loans	'	'	'	12,200,000	'
Increase (decrease) on gross provision for loan losses	'	'	-10,100,000	-16,500,000	-1,700,000
Charge-offs (recoveries), net before FDIC indemnification	'	'	-4,800,000	8,600,000	-7,100,000
Total reversal amount to ALLL	'	'	15,100,000	20,400,000	16,100,000
Additional interest income due to increased cash flows from acquired loans	'	'	90,900,000	58,500,000	78,400,000
Additional noninterest expense due to increased cash flows from acquired loans	'	'	75,000,000	46,200,000	56,600,000
Loss sharing reimbursement, minimum	'	'	80.00%	'	'
Loss sharing reimbursement, maximum	'	'	95.00%	'	'
Maximum Number of Years For FDIC Coverage For All Except Single Family Residential Loans	'	'	5	'	'
Maximum Number Of Years For FDIC Coverage For Single Family Residential Loans	'	'	10	'	'
Owner Occupied [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	138,945,000	185,695,000	'
Commercial [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	295,729,000	332,510,000	'
Subsequent payment default period, number of days	'	'	90	'	'
Consumer [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	99,977,000	112,057,000	'
Subsequent payment default period, number of days	'	'	60	'	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	'	574,793,000	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Owner Occupied [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	'	79,413,000	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	'	106,448,000	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Consumer [Member]	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'
Impaired Financing Receivable, Recorded Investment	'	'	'	$55,199,000	'

Loans_And_Allowance_For_Credit3

Loans And Allowance For Credit Losses (Summary Of Major Portfolio Segment And Specific Loan Class) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Loans held for sale	$171,328	$251,651
Commercial and industrial	12,481,083	11,256,945
Leasing	387,929	422,513
Owner occupied	7,437,195	7,589,082
Municipal	449,418	494,183
Total commercial	20,755,625	19,762,723
Construction and land development	2,182,821	1,939,413
Term	8,005,837	8,062,819
Loans receivable, gross, commercial, real estate	10,188,658	10,002,232
Home equity credit line	2,133,120	2,177,680
1-4 family residential	4,736,665	4,350,329
Construction and other consumer real estate	324,922	321,235
Bankcard and other revolving plans	356,240	306,428
Other	197,864	216,379
Total consumer	7,748,811	7,372,051
FDIC-supported loans	350,271	528,241
Total loans	$39,043,365	$37,665,247

Loans_And_Allowance_For_Credit4

Loans And Allowance For Credit Losses (Summary Of Changes In The Allowance For Credit Losses) (Details) (USD $)

3 Months Ended

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

Balance at beginning of period

'

'

'

$896,087

'

'

'

$1,051,685

$896,087

$1,051,685

'

Provision for loan losses

-30,538

-5,573

-21,990

-29,035

-10,401

-1,889

10,853

15,664

-87,136

14,227

74,532

Adjustment for FDIC-supported loans

'

'

'

'

'

'

'

'

-11,237

-14,542

'

Gross loan and lease charge-offs

'

'

'

'

'

'

'

'

-130,797

-267,189

'

Recoveries

'

'

'

'

'

'

'

'

-79,374

111,906

[1]

'

Net loan and lease charge-offs

'

'

'

'

'

'

'

'

-51,423

-155,283

'

Balance at end of period

746,291

'

'

'

896,087

'

'

'

746,291

896,087

1,051,685

Balance at beginning of period

'

'

'

106,809

'

'

'

102,422

106,809

102,422

'

Provision charged (credited) to earnings

'

'

'

'

'

'

'

'

-17,104

4,387

'

Balance at end of period

89,705

'

'

'

106,809

'

'

'

89,705

106,809

102,422

Allowance for loan losses

746,291

'

'

'

896,087

'

'

'

746,291

896,087

1,051,685

Reserve for unfunded lending commitments

89,705

'

'

'

106,809

'

'

'

89,705

106,809

102,422

Total allowance for credit losses

835,996

'

'

'

1,002,896

'

'

'

835,996

1,002,896

'

Commercial [Member]

'

'

'

'

'

'

'

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

Balance at beginning of period

'

'

'

510,908

'

'

'

561,351

510,908

561,351

'

Provision for loan losses

'

'

'

'

'

'

'

'

-5,640

16,808

'

Adjustment for FDIC-supported loans

'

'

'

'

'

'

'

'

0

0

'

Gross loan and lease charge-offs

'

'

'

'

'

'

'

'

-75,434

-117,506

'

Recoveries

'

'

'

'

'

'

'

'

-35,311

50,255

[1]

'

Net loan and lease charge-offs

'

'

'

'

'

'

'

'

-40,123

-67,251

'

Balance at end of period

465,145

'

'

'

510,908

'

'

'

465,145

510,908

'

Balance at beginning of period

'

'

'

67,374

'

'

'

77,232

67,374

77,232

'

Provision charged (credited) to earnings

'

'

'

'

'

'

'

'

-19,029

-9,858

'

Balance at end of period

48,345

'

'

'

67,374

'

'

'

48,345

67,374

'

Allowance for loan losses

465,145

'

'

'

510,908

'

'

'

465,145

510,908

'

Reserve for unfunded lending commitments

48,345

'

'

'

67,374

'

'

'

48,345

67,374

'

Total allowance for credit losses

513,490

'

'

'

578,282

'

'

'

513,490

578,282

'

Commercial Real Estate [Member]

'

'

'

'

'

'

'

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

Balance at beginning of period

'

'

'

276,976

'

'

'

343,747

276,976

343,747

'

Provision for loan losses

'

'

'

'

'

'

'

'

-63,544

-18,982

'

Adjustment for FDIC-supported loans

'

'

'

'

'

'

'

'

0

0

'

Gross loan and lease charge-offs

'

'

'

'

'

'

'

'

-24,609

-82,944

'

Recoveries

'

'

'

'

'

'

'

'

-24,540

35,155

[1]

'

Net loan and lease charge-offs

'

'

'

'

'

'

'

'

-69

-47,789

'

Balance at end of period

213,363

'

'

'

276,976

'

'

'

213,363

276,976

'

Balance at beginning of period

'

'

'

37,852

'

'

'

23,572

37,852

23,572

'

Provision charged (credited) to earnings

'

'

'

'

'

'

'

'

-367

14,280

'

Balance at end of period

37,485

'

'

'

37,852

'

'

'

37,485

37,852

'

Allowance for loan losses

213,363

'

'

'

276,976

'

'

'

213,363

276,976

'

Reserve for unfunded lending commitments

37,485

'

'

'

37,852

'

'

'

37,485

37,852

'

Total allowance for credit losses

250,848

'

'

'

314,828

'

'

'

250,848

314,828

'

Consumer [Member]

'

'

'

'

'

'

'

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

Balance at beginning of period

'

'

'

95,656

'

'

'

123,115

95,656

123,115

'

Provision for loan losses

'

'

'

'

'

'

'

'

-19,100

18,389

'

Adjustment for FDIC-supported loans

'

'

'

'

'

'

'

'

0

0

'

Gross loan and lease charge-offs

'

'

'

'

'

'

'

'

-28,960

-60,273

'

Recoveries

'

'

'

'

'

'

'

'

-13,269

14,425

[1]

'

Net loan and lease charge-offs

'

'

'

'

'

'

'

'

-15,691

-45,848

'

Balance at end of period

60,865

'

'

'

95,656

'

'

'

60,865

95,656

'

Balance at beginning of period

'

'

'

1,583

'

'

'

1,618

1,583

1,618

'

Provision charged (credited) to earnings

'

'

'

'

'

'

'

'

2,292

-35

'

Balance at end of period

3,875

'

'

'

1,583

'

'

'

3,875

1,583

'

Allowance for loan losses

60,865

'

'

'

95,656

'

'

'

60,865

95,656

'

Reserve for unfunded lending commitments

3,875

'

'

'

1,583

'

'

'

3,875

1,583

'

Total allowance for credit losses

64,740

'

'

'

97,239

'

'

'

64,740

97,239

'

FDIC- Supported [Member]

'

'

'

'

'

'

'

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

Balance at beginning of period

'

'

'

12,547

[1]

'

'

'

23,472

[1]

12,547

[1]

23,472

[1]

'

Provision for loan losses

'

'

'

'

'

'

'

'

1,148

[1]

-1,988

[1]

'

Adjustment for FDIC-supported loans

'

'

'

'

'

'

'

'

-11,237

[1]

-14,542

[1]

'

Gross loan and lease charge-offs

'

'

'

'

'

'

'

'

-1,794

[1]

-6,466

[1]

'

Recoveries

'

'

'

'

'

'

'

'

-6,254

[1]

12,071

[1]

'

Net loan and lease charge-offs

'

'

'

'

'

'

'

'

4,460

[1]

5,605

[1]

'

Balance at end of period

6,918

[1]

'

'

'

12,547

[1]

'

'

'

6,918

[1]

12,547

[1]

'

Balance at beginning of period

'

'

'

0

[1]

'

'

'

0

[1]

0

[1]

0

[1]

'

Provision charged (credited) to earnings

'

'

'

'

'

'

'

'

0

[1]

0

[1]

'

Balance at end of period

0

[1]

'

'

'

0

[1]

'

'

'

0

[1]

0

[1]

'

Allowance for loan losses

6,918

[1]

'

'

'

12,547

[1]

'

'

'

6,918

[1]

12,547

[1]

'

Reserve for unfunded lending commitments

0

[1]

'

'

'

0

[1]

'

'

'

0

[1]

0

[1]

'

Total allowance for credit losses

$6,918

[1]

'

'

'

$12,547

[1]

'

'

'

$6,918

[1]

$12,547

[1]

'

[1]

The Purchased Loans section following contains further discussion related to FDIC-supported loans.

Loans_And_Allowance_For_Credit5

Loans And Allowance For Credit Losses (Summary Of ALLL And Outstanding Loan Balances According To The Company's Impairment Method) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
Allowance for loan losses: Individually evaluated for impairment	($62,499)		($66,640)		'
Allowance for loan losses: Collectively evaluated for impairment	677,266		817,322		'
Allowance for loan losses: Purchased loans with evidence of credit deterioration	6,526		12,125		'
Allowance for loan losses: Total	746,291		896,087		1,051,685
Outstanding loan balances: Individually evaluated for impairment	681,280		904,496		'
Outstanding loan balances: Collectively evaluated for impairment	38,051,001		36,291,555		'
Outstanding loan balances: Purchased loans with evidence of credit deterioration	311,084		469,196		'
Total loans	39,043,365		37,665,247		'
Commercial [Member]	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
Allowance for loan losses: Individually evaluated for impairment	-39,288		-30,587		'
Allowance for loan losses: Collectively evaluated for impairment	425,857		480,321		'
Allowance for loan losses: Purchased loans with evidence of credit deterioration	0		0		'
Allowance for loan losses: Total	465,145		510,908		561,351
Outstanding loan balances: Individually evaluated for impairment	315,604		353,380		'
Outstanding loan balances: Collectively evaluated for impairment	20,440,021		19,409,343		'
Outstanding loan balances: Purchased loans with evidence of credit deterioration	0		0		'
Total loans	20,755,625		19,762,723		'
Commercial Real Estate [Member]	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
Allowance for loan losses: Individually evaluated for impairment	-12,510		-22,295		'
Allowance for loan losses: Collectively evaluated for impairment	200,853		254,681		'
Allowance for loan losses: Purchased loans with evidence of credit deterioration	0		0		'
Allowance for loan losses: Total	213,363		276,976		343,747
Outstanding loan balances: Individually evaluated for impairment	262,907		437,647		'
Outstanding loan balances: Collectively evaluated for impairment	9,925,751		9,564,585		'
Outstanding loan balances: Purchased loans with evidence of credit deterioration	0		0		'
Total loans	10,188,658		10,002,232		'
Consumer [Member]	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
Allowance for loan losses: Individually evaluated for impairment	-10,701		-13,758		'
Allowance for loan losses: Collectively evaluated for impairment	50,164		81,898		'
Allowance for loan losses: Purchased loans with evidence of credit deterioration	0		0		'
Allowance for loan losses: Total	60,865		95,656		123,115
Outstanding loan balances: Individually evaluated for impairment	101,545		112,320		'
Outstanding loan balances: Collectively evaluated for impairment	7,647,266		7,259,731		'
Outstanding loan balances: Purchased loans with evidence of credit deterioration	0		0		'
Total loans	7,748,811		7,372,051		'
FDIC- Supported [Member]	'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'
Allowance for loan losses: Individually evaluated for impairment	0		0		'
Allowance for loan losses: Collectively evaluated for impairment	392		422		'
Allowance for loan losses: Purchased loans with evidence of credit deterioration	6,526		12,125		'
Allowance for loan losses: Total	6,918	[1]	12,547	[1]	23,472	[1]
Outstanding loan balances: Individually evaluated for impairment	1,224		1,149		'
Outstanding loan balances: Collectively evaluated for impairment	37,963		57,896		'
Outstanding loan balances: Purchased loans with evidence of credit deterioration	311,084		469,196		'
Total loans	$350,271		$528,241		'
[1]	The Purchased Loans section following contains further discussion related to FDIC-supported loans.

Loans_And_Allowance_For_Credit6

Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	$406,613	$648,153
Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	244,984	306,962
Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	89,585	232,273
Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	67,650	91,575
Commercial And Industrial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	97,960	90,859
Leasing [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	757	838
Owner Occupied [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	136,281	206,031
Municipal [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	9,986	9,234
Construction And Land Development [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	29,205	107,658
Term [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	60,380	124,615
Home Equity Credit Line [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	8,969	14,247
1-4 Family Residential [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	53,002	70,180
Construction And Other Consumer Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	3,510	4,560
Bankcard And Other Revolving Plans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	1,365	1,190
Other [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	804	1,398
FDIC-Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Financing Receivable, Recorded Investment, Nonaccrual Status	$4,394	$17,343

Loans_And_Allowance_For_Credit7

Loans And Allowance For Credit Losses (Summary Of Past Due Loans (Accruing And Nonaccruing)) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Loans Receivable Held-for-sale, Net	$171,328		$251,651
Current	38,711,947		37,046,712
30-89 days past due	145,849		269,740
90+ days past due	185,569		348,795
Total past due	331,418		618,535
Total loans	39,043,365		37,665,247
Accruing loans 90+ days past due	40,348		61,763
Nonaccrual loans that are current	232,055	[1]	288,728	[1]
Commercial [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	'		19,487,495
30-89 days past due	'		130,174
90+ days past due	'		145,054
Total past due	'		275,228
Total loans	20,755,625		19,762,723
Accruing loans 90+ days past due	'		5,835
Nonaccrual loans that are current	'		142,458	[1]
Commercial Loan [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	20,573,298		'
30-89 days past due	89,009		'
90+ days past due	93,318		'
Total past due	182,327		'
Total loans	20,755,625		'
Accruing loans 90+ days past due	2,635		'
Nonaccrual loans that are current	136,223		'
Commercial Real Estate [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	'		9,821,103
30-89 days past due	'		90,869
90+ days past due	'		90,260
Total past due	'		181,129
Total loans	10,188,658		10,002,232
Accruing loans 90+ days past due	'		960
Nonaccrual loans that are current	'		104,590	[1]
Home Equity Credit Line [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	2,122,549		2,169,722
30-89 days past due	8,001		4,036
90+ days past due	2,570		3,922
Total past due	10,571		7,958
Total loans	2,133,120		2,177,680
Accruing loans 90+ days past due	98		0
Nonaccrual loans that are current	2,868	[1]	8,846	[1]
Consumer [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	'		7,283,781
30-89 days past due	'		36,290
90+ days past due	'		51,980
Total past due	'		88,270
Total loans	7,748,811		7,372,051
Accruing loans 90+ days past due	'		2,935
Nonaccrual loans that are current	'		34,287	[1]
Commercial And Industrial [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	12,387,546		11,124,639
30-89 days past due	48,811		73,555
90+ days past due	44,726		58,751
Total past due	93,537		132,306
Total loans	12,481,083		11,256,945
Accruing loans 90+ days past due	1,855		4,013
Nonaccrual loans that are current	52,412	[1]	32,389	[1]
Leasing [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	387,526		421,590
30-89 days past due	173		115
90+ days past due	230		808
Total past due	403		923
Total loans	387,929		422,513
Accruing loans 90+ days past due	36		0
Nonaccrual loans that are current	563	[1]	0	[1]
Owner Occupied [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	7,357,618		7,447,083
30-89 days past due	36,718		56,504
90+ days past due	42,859		85,495
Total past due	79,577		141,999
Total loans	7,437,195		7,589,082
Accruing loans 90+ days past due	744		1,822
Nonaccrual loans that are current	82,072	[1]	100,835	[1]
Municipal [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	440,608		494,183
30-89 days past due	3,307		0
90+ days past due	5,503		0
Total past due	8,810		0
Total loans	449,418		494,183
Accruing loans 90+ days past due	0		0
Nonaccrual loans that are current	1,176	[1]	9,234	[1]
Construction And Land Development [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	2,162,018		1,836,284
30-89 days past due	8,967		66,139
90+ days past due	11,836		36,990
Total past due	20,803		103,129
Total loans	2,182,821		1,939,413
Accruing loans 90+ days past due	23		853
Nonaccrual loans that are current	17,311	[1]	50,044	[1]
Term [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	7,971,327		7,984,819
30-89 days past due	15,362		24,730
90+ days past due	19,148		53,270
Total past due	34,510		78,000
Total loans	8,005,837		8,062,819
Accruing loans 90+ days past due	5,580		107
Nonaccrual loans that are current	42,624	[1]	54,546	[1]
Commercial Real Estate [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	10,133,345		'
30-89 days past due	24,329		'
90+ days past due	30,984		'
Total past due	55,313		'
Total loans	10,188,658		'
Accruing loans 90+ days past due	5,603		'
Nonaccrual loans that are current	59,935		'
1-4 Family Residential [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	4,704,852		4,282,611
30-89 days past due	8,526		24,060
90+ days past due	23,287		43,658
Total past due	31,813		67,718
Total loans	4,736,665		4,350,329
Accruing loans 90+ days past due	667		1,423
Nonaccrual loans that are current	27,592	[1]	21,945	[1]
Construction And Other Consumer Real Estate [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	322,807		314,931
30-89 days past due	1,038		4,344
90+ days past due	1,077		1,960
Total past due	2,115		6,304
Total loans	324,922		321,235
Accruing loans 90+ days past due	0		395
Nonaccrual loans that are current	2,232	[1]	2,500	[1]
Bankcard And Other Revolving Plans [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	353,060		302,587
30-89 days past due	2,093		2,439
90+ days past due	1,087		1,402
Total past due	3,180		3,841
Total loans	356,240		306,428
Accruing loans 90+ days past due	900		1,010
Nonaccrual loans that are current	1,105	[1]	721	[1]
Other [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	196,327		213,930
30-89 days past due	827		1,411
90+ days past due	710		1,038
Total past due	1,537		2,449
Total loans	197,864		216,379
Accruing loans 90+ days past due	54		107
Nonaccrual loans that are current	125	[1]	275	[1]
Consumer Loan [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	7,699,595		'
30-89 days past due	20,485		'
90+ days past due	28,731		'
Total past due	49,216		'
Total loans	7,748,811		'
Accruing loans 90+ days past due	1,719		'
Nonaccrual loans that are current	33,922		'
FDIC-Supported Loans [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	305,709		454,333
30-89 days past due	12,026		12,407
90+ days past due	32,536		61,501
Total past due	44,562		73,908
Total loans	350,271		528,241
Accruing loans 90+ days past due	30,391		52,033
Nonaccrual loans that are current	1,975	[1]	7,393	[1]
Special Mention [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Total loans	$700,374		$696,548
[1]	Represents nonaccrual loans not past due more than 30 days; however, full payment of principal and interest is still not expected.

Loans_And_Allowance_For_Credit8

Loans And Allowance For Credit Losses (Summary Of Outstanding Loan Balances (Accruing And Nonaccruing) Categorized By Credit Quality Indicators) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	$12,481,083	$11,256,945
Leasing	387,929	422,513
Commercial Lending Loans - Owner Occupied	7,437,195	7,589,082
Loans and Leases Receivable, Gross, Commercial, Governments	449,418	494,183
Loans and Leases Receivable, Gross, Commercial	20,755,625	19,762,723
Loans Receivable Commercial Construction and Land Development	2,182,821	1,939,413
Term	8,005,837	8,062,819
Loans Receivable, Gross, Commercial, Real Estate	10,188,658	10,002,232
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,133,120	2,177,680
1-4 family residential	4,736,665	4,350,329
Loans and Leases Receivable, Gross, Consumer, Construction	324,922	321,235
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	356,240	306,428
Loans and Leases Receivable, Gross, Consumer, Other	197,864	216,379
Loans and Leases Receivable, Gross, Consumer	7,748,811	7,372,051
FDIC-supported loans	350,271	528,241
Loans and Leases Receivable, Gross	39,043,365	37,665,247
Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	12,481,083	'
Leasing	387,929	'
Commercial Lending Loans - Owner Occupied	7,437,195	'
Loans and Leases Receivable, Gross, Commercial, Governments	449,418	'
Loans and Leases Receivable, Gross, Commercial	20,755,625	'
Loans and Leases Receivable, Gross	20,755,625	19,762,723
Construction And Land Development [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans Receivable Commercial Construction and Land Development	2,182,821	'
Loans and Leases Receivable, Gross	2,182,821	1,939,413
Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	8,005,837	'
Loans Receivable, Gross, Commercial, Real Estate	10,188,658	'
Loans and Leases Receivable, Gross	10,188,658	10,002,232
Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,133,120	'
1-4 family residential	4,736,665	'
Loans and Leases Receivable, Gross, Consumer, Construction	324,922	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	356,240	'
Loans and Leases Receivable, Gross, Consumer, Other	197,864	'
Loans and Leases Receivable, Gross, Consumer	7,748,811	'
Loans and Leases Receivable, Gross	7,748,811	7,372,051
FDIC-Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross	350,271	528,241
F D I C Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	350,271	'
Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	'	10,717,594
Leasing	'	419,482
Commercial Lending Loans - Owner Occupied	'	6,833,923
Loans and Leases Receivable, Gross, Commercial, Governments	'	453,193
Loans and Leases Receivable, Gross, Commercial	'	18,424,192
Loans Receivable Commercial Construction and Land Development	'	1,648,215
Term	'	7,433,789
Loans Receivable, Gross, Commercial, Real Estate	'	9,082,004
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	2,138,693
1-4 family residential	'	4,234,426
Loans and Leases Receivable, Gross, Consumer, Construction	'	313,499
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	'	298,665
Loans and Leases Receivable, Gross, Consumer, Other	'	209,293
Loans and Leases Receivable, Gross, Consumer	'	7,194,576
FDIC-supported loans	'	327,609
Loans and Leases Receivable, Gross	37,009,767	35,028,381
Pass [Member] | Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	11,807,825	'
Leasing	380,268	'
Commercial Lending Loans - Owner Occupied	6,827,464	'
Loans and Leases Receivable, Gross, Commercial, Governments	439,432	'
Loans and Leases Receivable, Gross, Commercial	19,454,989	'
Pass [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans Receivable Commercial Construction and Land Development	2,107,828	'
Pass [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	7,569,472	'
Loans Receivable, Gross, Commercial, Real Estate	9,677,300	'
Pass [Member] | Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,111,475	'
1-4 family residential	4,668,841	'
Loans and Leases Receivable, Gross, Consumer, Construction	313,881	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	353,618	'
Loans and Leases Receivable, Gross, Consumer, Other	196,770	'
Loans and Leases Receivable, Gross, Consumer	7,644,585	'
Pass [Member] | F D I C Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	232,893	'
Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	'	198,645
Leasing	'	226
Commercial Lending Loans - Owner Occupied	'	138,539
Loans and Leases Receivable, Gross, Commercial, Governments	'	31,756
Loans and Leases Receivable, Gross, Commercial	'	369,166
Loans Receivable Commercial Construction and Land Development	'	57,348
Term	'	237,201
Loans Receivable, Gross, Commercial, Real Estate	'	294,549
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	85
1-4 family residential	'	4,316
Loans and Leases Receivable, Gross, Consumer, Construction	'	218
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	'	23
Loans and Leases Receivable, Gross, Consumer, Other	'	3,211
Loans and Leases Receivable, Gross, Consumer	'	7,853
FDIC-supported loans	'	24,980
Loans and Leases Receivable, Gross	700,374	696,548
Special Mention [Member] | Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	303,598	'
Leasing	2,050	'
Commercial Lending Loans - Owner Occupied	184,328	'
Loans and Leases Receivable, Gross, Commercial, Governments	0	'
Loans and Leases Receivable, Gross, Commercial	489,976	'
Special Mention [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans Receivable Commercial Construction and Land Development	15,010	'
Special Mention [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	172,856	'
Loans Receivable, Gross, Commercial, Real Estate	187,866	'
Special Mention [Member] | Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	0	'
1-4 family residential	0	'
Loans and Leases Receivable, Gross, Consumer, Construction	0	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0	'
Loans and Leases Receivable, Gross, Consumer, Other	0	'
Loans and Leases Receivable, Gross, Consumer	0	'
Special Mention [Member] | F D I C Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	22,532	'
Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	'	336,230
Leasing	'	2,805
Commercial Lending Loans - Owner Occupied	'	612,011
Loans and Leases Receivable, Gross, Commercial, Governments	'	9,234
Loans and Leases Receivable, Gross, Commercial	'	960,280
Loans Receivable Commercial Construction and Land Development	'	233,374
Term	'	388,914
Loans Receivable, Gross, Commercial, Real Estate	'	622,288
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	38,897
1-4 family residential	'	111,063
Loans and Leases Receivable, Gross, Consumer, Construction	'	7,518
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	'	7,740
Loans and Leases Receivable, Gross, Consumer, Other	'	3,875
Loans and Leases Receivable, Gross, Consumer	'	169,093
FDIC-supported loans	'	175,652
Loans and Leases Receivable, Gross	1,323,955	1,927,313
Sub-Standard [Member] | Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	360,391	'
Leasing	5,611	'
Commercial Lending Loans - Owner Occupied	425,403	'
Loans and Leases Receivable, Gross, Commercial, Governments	9,986	'
Loans and Leases Receivable, Gross, Commercial	801,391	'
Sub-Standard [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans Receivable Commercial Construction and Land Development	59,983	'
Sub-Standard [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	263,509	'
Loans Receivable, Gross, Commercial, Real Estate	323,492	'
Sub-Standard [Member] | Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	21,645	'
1-4 family residential	67,824	'
Loans and Leases Receivable, Gross, Consumer, Construction	11,041	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	2,622	'
Loans and Leases Receivable, Gross, Consumer, Other	1,094	'
Loans and Leases Receivable, Gross, Consumer	104,226	'
Sub-Standard [Member] | F D I C Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	94,846	'
Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	'	4,476
Leasing	'	0
Commercial Lending Loans - Owner Occupied	'	4,609
Loans and Leases Receivable, Gross, Commercial, Governments	'	0
Loans and Leases Receivable, Gross, Commercial	'	9,085
Loans Receivable Commercial Construction and Land Development	'	476
Term	'	2,915
Loans Receivable, Gross, Commercial, Real Estate	'	3,391
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	5
1-4 family residential	'	524
Loans and Leases Receivable, Gross, Consumer, Construction	'	0
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	'	0
Loans and Leases Receivable, Gross, Consumer, Other	'	0
Loans and Leases Receivable, Gross, Consumer	'	529
FDIC-supported loans	'	0
Loans and Leases Receivable, Gross	9,269	13,005
Doubtful [Member] | Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	9,269	'
Leasing	0	'
Commercial Lending Loans - Owner Occupied	0	'
Loans and Leases Receivable, Gross, Commercial, Governments	0	'
Loans and Leases Receivable, Gross, Commercial	9,269	'
Doubtful [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans Receivable Commercial Construction and Land Development	0	'
Doubtful [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	0	'
Loans Receivable, Gross, Commercial, Real Estate	0	'
Doubtful [Member] | Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	0	'
1-4 family residential	0	'
Loans and Leases Receivable, Gross, Consumer, Construction	0	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0	'
Loans and Leases Receivable, Gross, Consumer, Other	0	'
Loans and Leases Receivable, Gross, Consumer	0	'
Doubtful [Member] | F D I C Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	0	'
Total Allowance [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Commercial	'	510,908
Loans Receivable, Gross, Commercial, Real Estate	'	276,976
Loans and Leases Receivable, Gross, Consumer	'	95,656
FDIC-supported loans	'	12,547
Loans and Leases Receivable, Gross	746,291	896,087
Total Allowance [Member] | Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Commercial	465,145	'
Total Allowance [Member] | Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans Receivable, Gross, Commercial, Real Estate	213,363	'
Total Allowance [Member] | Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans and Leases Receivable, Gross, Consumer	60,865	'
Total Allowance [Member] | F D I C Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	$6,918	'

Loans_And_Allowance_For_Credit9

Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	$1,329,095	$1,889,661
Impaired Financing Receivable, Recorded Investment	924,553	1,325,838
Impaired Financing Receivable, Related Allowance	66,206	77,089
Impaired Financing Receivable, Interest Income, Accrual Method	132,087	109,932
Impaired Financing Receivable, Unpaid Principal Balance	1,109,953	1,908,339
Commercial And Industrial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	185,895	199,238
Impaired Financing Receivable, Recorded Investment	156,784	146,815
Impaired Financing Receivable, Related Allowance	23,687	12,198
Impaired Financing Receivable, Interest Income, Accrual Method	3,572	3,557
Impaired Financing Receivable, Unpaid Principal Balance	178,281	176,521
Owner Occupied [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	216,218	262,511
Impaired Financing Receivable, Recorded Investment	138,945	185,695
Impaired Financing Receivable, Related Allowance	13,900	17,105
Impaired Financing Receivable, Interest Income, Accrual Method	3,620	2,512
Impaired Financing Receivable, Unpaid Principal Balance	151,499	210,319
Commercial Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	402,113	461,749
Impaired Financing Receivable, Recorded Investment	295,729	332,510
Impaired Financing Receivable, Related Allowance	37,587	29,303
Impaired Financing Receivable, Interest Income, Accrual Method	7,192	6,069
Impaired Financing Receivable, Unpaid Principal Balance	329,780	386,840
Construction And Land Development [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	134,540	274,226
Impaired Financing Receivable, Recorded Investment	69,950	153,096
Impaired Financing Receivable, Related Allowance	3,483	5,178
Impaired Financing Receivable, Interest Income, Accrual Method	4,013	4,785
Impaired Financing Receivable, Unpaid Principal Balance	85,440	182,385
Term [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	286,389	410,901
Impaired Financing Receivable, Recorded Investment	146,588	257,830
Impaired Financing Receivable, Related Allowance	7,981	16,725
Impaired Financing Receivable, Interest Income, Accrual Method	6,686	7,298
Impaired Financing Receivable, Unpaid Principal Balance	171,826	310,242
Commercial Real Estate Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	420,929	685,127
Impaired Financing Receivable, Recorded Investment	216,538	410,926
Impaired Financing Receivable, Related Allowance	11,464	21,903
Impaired Financing Receivable, Interest Income, Accrual Method	10,699	12,083
Impaired Financing Receivable, Unpaid Principal Balance	257,266	492,627
Home Equity Line of Credit [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	13,380	2,766
Impaired Financing Receivable, Recorded Investment	14,768	11,499
Impaired Financing Receivable, Related Allowance	178	297
Impaired Financing Receivable, Interest Income, Accrual Method	385	42
Impaired Financing Receivable, Unpaid Principal Balance	17,547	14,339
One Through Four Family Residential [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	100,283	107,118
Impaired Financing Receivable, Recorded Investment	80,907	92,469
Impaired Financing Receivable, Related Allowance	10,276	12,921
Impaired Financing Receivable, Interest Income, Accrual Method	1,581	1,629
Impaired Financing Receivable, Unpaid Principal Balance	95,613	108,934
Construction And Other Consumer Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	6,218	9,697
Impaired Financing Receivable, Recorded Investment	3,576	5,795
Impaired Financing Receivable, Related Allowance	175	517
Impaired Financing Receivable, Interest Income, Accrual Method	148	188
Impaired Financing Receivable, Unpaid Principal Balance	4,713	7,054
Bankcard And Other Revolving Plans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	0	24
Impaired Financing Receivable, Recorded Investment	726	287
Impaired Financing Receivable, Related Allowance	0	1
Impaired Financing Receivable, Interest Income, Accrual Method	0	0
Impaired Financing Receivable, Unpaid Principal Balance	726	287
Consumer Other Financing Receivable [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	1,770	1,055
Impaired Financing Receivable, Recorded Investment	0	2,007
Impaired Financing Receivable, Related Allowance	0	22
Impaired Financing Receivable, Interest Income, Accrual Method	0	0
Impaired Financing Receivable, Unpaid Principal Balance	0	2,454
Consumer Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	121,651	120,660
Impaired Financing Receivable, Recorded Investment	99,977	112,057
Impaired Financing Receivable, Related Allowance	10,629	13,758
Impaired Financing Receivable, Interest Income, Accrual Method	2,114	1,859
Impaired Financing Receivable, Unpaid Principal Balance	118,599	133,068
FDIC-Supported Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Average Recorded Investment	384,402	622,125
Impaired Financing Receivable, Recorded Investment	312,309	470,345
Impaired Financing Receivable, Related Allowance	6,526	12,125
Impaired Financing Receivable, Interest Income, Accrual Method	112,082	89,921
Impaired Financing Receivable, Unpaid Principal Balance	404,308	895,804
Impaired Financing Receivable Recorded Investment With an Allowance [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	652,007	751,045
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Commercial And Industrial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	126,692	119,780
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Owner Occupied [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	88,584	106,282
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Commercial Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	215,276	226,062
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	50,744	85,855
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Term [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	112,330	187,112
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Commercial Real Estate Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	163,074	272,967
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Home Equity Line of Credit [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	2,200	3,444
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | One Through Four Family Residential [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	42,132	49,867
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Construction And Other Consumer Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	933	3,085
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Bankcard And Other Revolving Plans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	0	287
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Consumer Other Financing Receivable [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	0	175
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | Consumer Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	45,265	56,858
Impaired Financing Receivable Recorded Investment With an Allowance [Member] | FDIC-Supported Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	228,392	195,158
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	574,793
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial And Industrial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	27,035
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Owner Occupied [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	79,413
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	106,448
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	67,241
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Term [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	70,718
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Commercial Real Estate Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	137,959
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Home Equity Line of Credit [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	8,055
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | One Through Four Family Residential [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	42,602
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Construction And Other Consumer Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	2,710
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Bankcard And Other Revolving Plans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	0
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Consumer Other Financing Receivable [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	1,832
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | Consumer Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	55,199
Impaired Financing Receivable Recorded Investment With No Allowance [Member] [Member] | FDIC-Supported Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	'	275,187
Impaired Financing Receivable Recorded Investment With No Allowance [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	272,546	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial And Industrial [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	30,092	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	50,361	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	80,453	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Land Development [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	19,206	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	34,258	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	53,464	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Home Equity Line of Credit [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	12,568	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | One Through Four Family Residential [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	38,775	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Other Consumer Real Estate [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	2,643	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Bankcard And Other Revolving Plans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	726	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Other Financing Receivable [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	0	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Portfolio Segment [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	54,712	'
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | FDIC-Supported Loans [Member]	'	'
Financing Receivable, Impaired [Line Items]	'	'
Impaired Financing Receivable, Recorded Investment	$83,917	'

Recovered_Sheet1

Loans And Allowance For Credit Losses (Summary Of Selected Information On TDRs That Includes Recorded Investment On An Accruing And Nonaccruing Basis By Loan Class And Modification Type) (Details) (USD $)	Dec. 31, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	$356,240		$306,428
Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	345,299		407,026
Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	481,434		622,502
Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	83,124		77,443
Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	28,833		25,879
Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	59,836		59,983
Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	32,554		29,439
Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	142,960		137,426
Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	61,387		55,318
Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	42,775		50,327
Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	27,174		89,851
Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	96,712		159,323
Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	19,245		33,330
Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	139,487		209,650
Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	46,419		123,181
Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	10,836		7,227
Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,257		4,282
One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	50,034		49,577
One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	25,327		30,315
Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,982		3,142
Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,493		1,921
Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	252		287
Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		4
Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	28,329		36,977
Consumer Portfolio Segment [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	356,240		'
Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	62,852		59,950
Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	136,135		215,476
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	36,424	[1]	71,947	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	65,594	[1]	94,645	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,308	[1]	17,647	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	8,948	[1]	2,035	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	9,659	[1]	9,305	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	10,482	[1]	7,643	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	13,967	[1]	26,952	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	19,430	[1]	9,678	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,119	[1]	8,432	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	5,303	[1]	1,807	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	14,932	[1]	32,302	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	315	[1]	9,389	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	19,051	[1]	40,734	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	5,618	[1]	11,196	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	323	[1]	300	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	221	[1]	131	[1]
Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,083	[1]	3,319	[1]
Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,901	[1]	1,693	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[1]	641	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[1]	0	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0	[1]	0	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[1]	1	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,122	[1]	1,824	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,406	[1]	4,261	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	29,170	[1]	22,698	[1]
Multiple Modification Types [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	203,727	[2]	210,110	[2]
Multiple Modification Types [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	266,865	[2]	336,117	[2]
Multiple Modification Types [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	53,117	[2]	44,684	[2]
Multiple Modification Types [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	10,395	[2]	17,379	[2]
Multiple Modification Types [Member] | Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	23,576	[2]	13,598	[2]
Multiple Modification Types [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	14,927	[2]	7,803	[2]
Multiple Modification Types [Member] | Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	76,693	[2]	58,282	[2]
Multiple Modification Types [Member] | Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	25,322	[2]	25,182	[2]
Multiple Modification Types [Member] | Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	28,295	[2]	30,248	[2]
Multiple Modification Types [Member] | Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	8,617	[2]	68,481	[2]
Multiple Modification Types [Member] | Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	61,024	[2]	82,809	[2]
Multiple Modification Types [Member] | Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	14,861	[2]	17,718	[2]
Multiple Modification Types [Member] | Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	89,319	[2]	113,057	[2]
Multiple Modification Types [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	23,478	[2]	86,199	[2]
Multiple Modification Types [Member] | Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	332	[2]	218	[2]
Multiple Modification Types [Member] | Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[2]	143	[2]
Multiple Modification Types [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	35,869	[2]	36,199	[2]
Multiple Modification Types [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	14,109	[2]	14,240	[2]
Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,514	[2]	2,354	[2]
Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	229	[2]	243	[2]
Multiple Modification Types [Member] | Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0	[2]	0	[2]
Multiple Modification Types [Member] | Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[2]	0	[2]
Multiple Modification Types [Member] | Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	14,338	[2]	14,626	[2]
Multiple Modification Types [Member] | Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	37,715	[2]	38,771	[2]
Multiple Modification Types [Member] | Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	63,138	[2]	126,007	[2]
Interest Rate Below Market [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	36,092		61,743
Interest Rate Below Market [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	59,284		91,884
Interest Rate Below Market [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,143		5,388
Interest Rate Below Market [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	2,028		318
Interest Rate Below Market [Member] | Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	22,841		20,963
Interest Rate Below Market [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,020		3,822
Interest Rate Below Market [Member] | Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	23,984		26,351
Interest Rate Below Market [Member] | Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	5,048		4,140
Interest Rate Below Market [Member] | Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,067		1,718
Interest Rate Below Market [Member] | Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	11,699		18,255
Interest Rate Below Market [Member] | Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	7,542		30,118
Interest Rate Below Market [Member] | Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	2,126		3,042
Interest Rate Below Market [Member] | Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	8,609		31,836
Interest Rate Below Market [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	13,825		21,297
Interest Rate Below Market [Member] | Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	743		744
Interest Rate Below Market [Member] | Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Interest Rate Below Market [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	2,628		2,665
Interest Rate Below Market [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,315		4,697
Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	128		147
Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4		7
Interest Rate Below Market [Member] | Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0		0
Interest Rate Below Market [Member] | Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Interest Rate Below Market [Member] | Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,319		4,704
Interest Rate Below Market [Member] | Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,499		3,556
Interest Rate Below Market [Member] | Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	23,192		30,141
Maturity Or Team Extension [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	30,128		31,292
Maturity Or Team Extension [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	43,069		51,214
Maturity Or Team Extension [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	9,848		6,139
Maturity Or Team Extension [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	6,989		5,667
Maturity Or Team Extension [Member] | Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,482		12,104
Maturity Or Team Extension [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,489		4,816
Maturity Or Team Extension [Member] | Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	11,330		18,243
Maturity Or Team Extension [Member] | Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	8,478		10,483
Maturity Or Team Extension [Member] | Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	8,231		9,868
Maturity Or Team Extension [Member] | Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,555		1,308
Maturity Or Team Extension [Member] | Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	9,241		1,854
Maturity Or Team Extension [Member] | Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		536
Maturity Or Team Extension [Member] | Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	17,472		11,722
Maturity Or Team Extension [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,555		1,844
Maturity Or Team Extension [Member] | Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Maturity Or Team Extension [Member] | Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Maturity Or Team Extension [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	997		1,324
Maturity Or Team Extension [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,396		5,637
Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	329		0
Maturity Or Team Extension [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,260		1,671
Maturity Or Team Extension [Member] | Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	252		287
Maturity Or Team Extension [Member] | Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		3
Maturity Or Team Extension [Member] | Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	2,908		7,595
Maturity Or Team Extension [Member] | Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,326		1,327
Maturity Or Team Extension [Member] | Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	12,941		19,922
Principal Forgiveness [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	28,931		20,323
Principal Forgiveness [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	32,616		29,033
Principal Forgiveness [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	11,491		0
Principal Forgiveness [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Forgiveness [Member] | Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	987		0
Principal Forgiveness [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,043		654
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	12,478		0
Principal Forgiveness [Member] | Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,043		654
Principal Forgiveness [Member] | Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		2
Principal Forgiveness [Member] | Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Forgiveness [Member] | Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	190		8,433
Principal Forgiveness [Member] | Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Forgiveness [Member] | Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	190		8,435
Principal Forgiveness [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Forgiveness [Member] | Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	9,438		5,965
Principal Forgiveness [Member] | Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,036		4,008
Principal Forgiveness [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	6,814		5,923
Principal Forgiveness [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,606		4,048
Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	11		0
Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Forgiveness [Member] | Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0		0
Principal Forgiveness [Member] | Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Principal Forgiveness [Member] | Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	2,642		8,056
Principal Forgiveness [Member] | Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	16,263		11,888
Principal Forgiveness [Member] | Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,685		8,710
Payment Deferral [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	9,997		11,611
Payment Deferral [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	14,006		19,609
Payment Deferral [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,217		3,585
Payment Deferral [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	473		480
Payment Deferral [Member] | Owner Occupied [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,291		4,013
Payment Deferral [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,593		4,701
Payment Deferral [Member] | Commercial Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,508		7,598
Payment Deferral [Member] | Commercial Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	2,066		5,181
Payment Deferral [Member] | Construction And Land Development [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,063		59
Payment Deferral [Member] | Construction And Land Development [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | Term [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	3,783		3,807
Payment Deferral [Member] | Term [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,943		2,645
Payment Deferral [Member] | Commercial Real Estate Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,846		3,866
Payment Deferral [Member] | Commercial Real Estate Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	1,943		2,645
Payment Deferral [Member] | Home Equity Credit Line [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | Home Equity Credit Line [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	643		147
Payment Deferral [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | Revolving Credit Facility [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0		0
Payment Deferral [Member] | Consumer Other Financing Receivable [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Payment Deferral [Member] | Consumer Other Financing Receivable [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		172
Payment Deferral [Member] | Consumer Portfolio Segment [Member] | Accruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	643		147
Payment Deferral [Member] | Consumer Portfolio Segment [Member] | Nonaccruing [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	4,009		7,998
Nonaccruing [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		172
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[1]	0	[1]
Nonaccruing [Member] | Multiple Modification Types [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0	[2]	0	[2]
Nonaccruing [Member] | Interest Rate Below Market [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Nonaccruing [Member] | Maturity Or Team Extension [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Nonaccruing [Member] | Principal Forgiveness [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	0		0
Nonaccruing [Member] | Payment Deferral [Member] | Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Financing Receivable, Modifications, Recorded Investment	$0		$172
[1]	Includes TDRs that resulted from other modification types including, but not limited to, a legal judgment awarded on different terms, a bankruptcy plan confirmed on different terms, a settlement that includes the delivery of collateral in exchange for debt reduction, etc.
[2]	Includes TDRs that resulted from a combination of any of the previous modification types.

Recovered_Sheet2

Loans And Allowance For Credit Losses (Summary Of Net Financial Impact On Interest Income Due To Interest Rate Modifications Below Market For Accruing TDR Loans) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	($30,457)	[1]	($26,556)	[1]
Commercial Loan [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-4,673		-1,899
Commercial Real Estate [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-10,250		-7,733
Home Equity Credit Line [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-121		-86
Consumer [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-15,534		-16,924
Commercial And Industrial [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-1		-287
Owner Occupied [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-4,672		-1,612
Construction And Land Development [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-1,342		-1,069
Term [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-8,908		-6,664
1-4 Family Residential [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	-14,980		-16,164
Construction And Other Consumer Real Estate [Member]	'		'
Financing Receivable, Modifications [Line Items]	'		'
Net financial impact on interest income	($433)		($674)
[1]	Calculated based on the difference between the modified rate and the premodified rate applied to the recorded investment.

Recovered_Sheet3

Loans And Allowance For Credit Losses (Schedule Of Investment Of Accruing And Nonaccruing Loans Modified As Troubled Debt Restructurings) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$5,040	$11,075
Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	159
Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	5,040	10,916
Commercial Real Estate [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,676	0
Commercial Real Estate [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Commercial Real Estate [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,676	0
Home Equity Credit Line [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	342	336
Home Equity Credit Line [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Home Equity Credit Line [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	342	336
Commercial And Industrial [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	1,816
Commercial And Industrial [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Commercial And Industrial [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	1,816
Owner Occupied [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	430	838
Owner Occupied [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	159
Owner Occupied [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	430	679
Commercial Loan [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	430	2,654
Commercial Loan [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	159
Commercial Loan [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	430	2,495
Construction And Land Development [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,676	0
Construction And Land Development [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Construction And Land Development [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	1,676	0
Term [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Term [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Term [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
1-4 Family Residential [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	2,592	8,085
1-4 Family Residential [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
1-4 Family Residential [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	2,592	8,085
Consumer Loan [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	2,934	8,421
Consumer Loan [Member] | Accruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0	0
Consumer Loan [Member] | Nonaccruing [Member]	'	'
Financing Receivable, Modifications [Line Items]	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$2,934	$8,421

Recovered_Sheet4

Loans And Allowance For Credit Losses (Schedule Of Outstanding Balances Of All Required Payments And The Related Carrying Amounts For PCI Loans) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans And Allowance For Credit Losses [Abstract]	'	'
Commercial	$150,191	$227,414
Commercial real estate	233,720	382,068
Consumer	28,608	41,398
Outstanding balance	412,519	650,880
Carrying amount	311,797	472,040
ALLL	6,478	12,077
Carrying amount, net	$305,319	$459,963

Recovered_Sheet5

Loans And Allowance For Credit Losses (Schedule Of Changes In The Accretable Yield For PCI Loans) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Changes in Accretable Yield [Roll Forward]	'	'
Balance at beginning of period	$134,461	$184,679
Accretion	-111,951	-89,849
Reclassification from nonaccretable difference	36,467	30,632
Disposals and other	18,551	8,999
Balance at end of period	$77,528	$134,461

Recovered_Sheet6

Loans And Allowance For Credit Losses (Schedule Of Changes In The FDIC Indemnification Asset) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Loans And Allowance For Credit Losses [Abstract]	'		'		'
FDIC Indemnification Asset	$26,411		$90,929		$133,810
FDIC Indemnification Asset [Roll Forward]	'		'		'
Amounts filed with the FDIC and collected or in process	21,302		17,004		'
Net change in asset balance due to reestimation of projected cash flows	($85,820)	[1]	($59,885)	[1]	'
[1]	1B Negative amounts result from the accretion of loan balances based on increases in cash flow estimates on the underlying indemnified loans.

Derivative_Instruments_And_Hed2

Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Derivative [Line Items]	'	'	'
Other Comprehensvie Income Loss Reclassification Adjustment From AOCI on Derivative Instruments, Gross	'	$2,600,000	$13,100,000
Derivatives designated for hedges of investments in foreign operations	'	0	'
Losses on derivative instruments as a result of counterparty nonperformance	'	0	'
Derivative Liability, Fair Value, Gross Liability	'	68,400,000	'
Fair values of derivative assets reduced (increased) by net credit valuation adjustments	'	1,600,000	3,100,000
Fair values of derivative liabilities reduced (increased) by net credit valuation adjustments	'	-2,400,000	-200,000
Cash collateral used to offset fair value amount under master neeting arrangements	'	0	0
Notional Amount of Derivatives	'	'	9,500,000,000
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	1,000,000	'	'
Notional amount of bank CDO securities credit risk assumed	'	1,160,000,000	'
Notional amount of bank and insurance trust preferred CDOs	'	4,979,378,000	4,536,509,000
Cash collateral pledged for derivative liabilities	'	34,900,000	'
Additional collateral that would be required to be pledge if credit rating was downgraded by one notch	'	1,500,000	'
Payment resulting from the termination of the interest rate swaps with Deutsche Bank	'	0	'
Total Return Swap [Member]	'	'	'
Derivative [Line Items]	'	'	'
Expected net quarterly costs	'	$5,400,000	'

Derivative_Instruments_And_Hed3

Derivative Instruments And Hedging Activities (Schedule Of Notional Amounts And Recorded Gross Fair Values And Related Gain (Loss) Of Derivative Instruments) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Derivative [Line Items]	'		'
Total derivatives, Notional amount	$4,979,378		$4,536,509
Derivatives hedging instruments, liabilities	68,400		'
Amount of derivative gain (loss), recognized in OCI	-225		390
Amount of derivative gain (loss), Reclassified from AOCI to interest income	2,647		13,062
Derivatives instruments, Noninterest income (expense)	-2,136		-6,683
Derivatives designated as hedging instruments, Offset to interest expense	3,120		3,054
Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	65,683		86,214
Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	68,397		92,259
Derivatives Designated As Hedging Instruments [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	100,000		150,000
Amount of derivative gain (loss), recognized in OCI	-225		390
Amount of derivative gain (loss), Reclassified from AOCI to interest income	2,647		13,062
Derivatives designated as hedging instruments, Offset to interest expense	3,120		3,054
Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedges [Member]	'		'
Derivative [Line Items]	'		'
Amount of derivative gain (loss), recognized in OCI	-225		390
Amount of derivative gain (loss), Reclassified from AOCI to interest income	2,647		13,062	[1]
Derivatives Designated As Hedging Instruments [Member] | Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	202		1,188
Derivatives Designated As Hedging Instruments [Member] | Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	583		0
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Cash Flow Hedges [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	100,000	[2]	150,000	[2]
Amount of derivative gain (loss), recognized in OCI	-225	[2]	390
Amount of derivative gain (loss), Reclassified from AOCI to interest income	2,647	[2]	13,062
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member] | Cash Flow Hedges [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	202	[2]	1,188	[2]
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member] | Cash Flow Hedges [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	583	[2]	0	[2]
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Floors [Member] | Cash Flow Hedges [Member]	'		'
Derivative [Line Items]	'		'
Amount of derivative gain (loss), recognized in OCI	0		0
Amount of derivative gain (loss), Reclassified from AOCI to interest income	0	[2]	0	[2]
Derivatives Designated As Hedging Instruments [Member] | Terminated Swaps On Long-Term Debt [Member] | Fair Value Hedges [Member]	'		'
Derivative [Line Items]	'		'
Derivatives designated as hedging instruments, Offset to interest expense	3,120		3,054
Derivatives Not Designated As Hedging Instruments [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	4,879,378		4,386,509
Derivatives instruments, Noninterest income (expense)	-2,136		-6,683
Derivatives Not Designated As Hedging Instruments [Member] | Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	65,481		85,026
Derivatives Not Designated As Hedging Instruments [Member] | Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	67,814		92,259
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	65,850		98,524
Derivatives instruments, Noninterest income (expense)	-493		-1,467
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	420		1,043
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	421		1,047
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	2,902,776	[3]	2,607,603	[3]
Derivatives instruments, Noninterest income (expense)	10,918	[3]	7,858
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member] | Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	55,447	[3]	79,579	[3]
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member] | Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	54,688	[3]	82,926	[3]
Derivatives Not Designated As Hedging Instruments [Member] | Basis Swaps [Member]	'		'
Derivative [Line Items]	'		'
Derivatives instruments, Noninterest income (expense)	0		18
Derivatives Not Designated As Hedging Instruments [Member] | Futures Contracts [Member]	'		'
Derivative [Line Items]	'		'
Derivatives instruments, Noninterest income (expense)	2		-13
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	751,066		520,696
Derivatives instruments, Noninterest income (expense)	9,190		8,628
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member] | Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	9,614		4,404
Derivatives Not Designated As Hedging Instruments [Member] | Foreign Exchange [Member] | Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	8,643		3,159
Derivatives Not Designated As Hedging Instruments [Member] | Total Return Swap [Member]	'		'
Derivative [Line Items]	'		'
Total derivatives, Notional amount	1,159,686		1,159,686
Derivatives instruments, Noninterest income (expense)	-21,753		-21,707
Derivatives Not Designated As Hedging Instruments [Member] | Total Return Swap [Member] | Other Assets [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, assets	0		0
Derivatives Not Designated As Hedging Instruments [Member] | Total Return Swap [Member] | Other Liabilities [Member]	'		'
Derivative [Line Items]	'		'
Derivatives hedging instruments, liabilities	$4,062		$5,127
[1]	Amounts of $2.6 million for 2013 and $13.1 million for 2012 are the amounts of reclassification to earnings presented in the tabular changes of AOCI in Note 14.
[2]	Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the derivative gain (loss).
[3]	Amounts include both the customer swaps and the offsetting derivative contracts.

Premises_and_Equipment_Details

Premises and Equipment (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Land	$185,119	$184,762
Investment Building and Building Improvements	509,151	497,449
Fixtures and Equipment, Gross	664,556	622,170
Leasehold Improvements, Gross	129,056	121,953
Property, Plant and Equipment, Gross	1,487,882	1,426,334
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	761,510	717,452
Premises and equipment, net	$726,372	$708,882

Goodwill_And_Other_Intangible_2

Goodwill And Other Intangible Assets Goodwill and Other Intangible Assets (Narative) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013
Goodwill [Line Items]	'
Goodwill, Impairment Loss	$0
Bank Susidiaries except The Commerce Bank of Oregon [Member]	'
Goodwill [Line Items]	'
Goodwill, Impairment Loss	0
The Commerce Bank Of Oregon [Member]	'
Goodwill [Line Items]	'
Goodwill, Impairment Loss	$1,000

Goodwill_And_Other_Intangible_3

Goodwill And Other Intangible Assets (Amortizing Intangible Assets) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]	'	'
Gross carrying amount	$209,354	$209,354
Accumulated amortization	172,910	158,536
Net carrying amount	36,444	50,818
Goodwill impairment	0	'
Core Deposit Intangibles [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross carrying amount	180,290	180,290
Accumulated amortization	146,557	133,628
Net carrying amount	33,733	46,662
Customer Relationships And Other Intangibles [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Gross carrying amount	29,064	29,064
Accumulated amortization	26,353	24,908
Net carrying amount	$2,711	$4,156

Goodwill_And_Other_Intangible_4

Goodwill And Other Intangible Assets (Schedule Of Estimated Amortization Expense) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Goodwill [Line Items]	'
2013	$10,924
2014	9,247
2015	7,888
2016	6,370
2017	$1,556

Goodwill_And_Other_Intangible_5

Goodwill And Other Intangible Assets (Schedule Of Goodwill) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Goodwill [Line Items]	'	'
Goodwill, Beginning Balance	$1,014,129	$1,015,129
Impairment losses	0	'
Adjustment	'	-1,000
Goodwill, Ending Balance	1,014,129	1,014,129
Zions Bank [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Beginning Balance	19,514	19,514
Impairment losses	0	'
Adjustment	'	0
Goodwill, Ending Balance	19,514	19,514
CB&T [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Beginning Balance	379,024	379,024
Impairment losses	0	'
Adjustment	'	0
Goodwill, Ending Balance	379,024	379,024
Amegy [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Beginning Balance	615,591	615,591
Impairment losses	0	'
Adjustment	'	0
Goodwill, Ending Balance	615,591	615,591
Other (Including ABS CDOs) [Member]	'	'
Goodwill [Line Items]	'	'
Goodwill, Beginning Balance	0	1,000
Impairment losses	0	'
Adjustment	'	-1,000
Goodwill, Ending Balance	$0	$0

Deposits_Narrative_Details

Deposits (Narrative) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Deposits [Abstract]	'	'
Contractual maturities, time deposits, $100,000 or more, domestic, less than 3 months [Abstract] [Abstract]	$351,000,000	'
Contractual maturities, time deposits, $100,000 or more, domestic, between 3 and 6 months [Abstract]	301,000,000	'
Contractual maturities, time deposits, $100,000 or more, between 6 and 12 months [Abstract]	374,000,000	'
Contractual maturities, time deposits, $100,000 or more, after 12 months [Abstract] [Abstract]	304,000,000	'
Domestic time deposits under $100,000	1,300,000,000	1,500,000,000
Domestic time deposits $100,000 and over	1,300,000,000	1,500,000,000
Foreign time deposits $100,000 and over	252,000,000	213,000,000
Deposit overdrafts reclassified as loan balances	$39,000,000	$78,000,000

Deposits_Scheduled_Maturities_

Deposits (Scheduled Maturities Of All Time Deposits) (Details) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Deposits [Abstract]	'
2014	$2,216,605
2015	265,984
2016	161,620
2017	86,903
2018	113,534
Thereafter	663
Time Deposits, total	$2,845,309

ShortTerm_Borrowings_Narrative

Short-Term Borrowings (Narrative) (Details) (USD $)	0 Months Ended
	Dec. 31, 2013
Short-term Debt [Line Items]	'
Number of maturity days of short-term borrowings, maximum	30
Percentage of outstanding advance for unencumbered collateral	100.00%
Amount available for FHLB advances	$11,000,000,000
Short-term FHLB advances	0
Example1 of term repurchase security agreement term	30
Term repurchase securitiy agreement term example2	60
Amount available for federal reserve borrowings	$5,300,000,000

ShortTerm_Borrowings_Summary_O

Short-Term Borrowings (Summary Of Short-Term Borrowings) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Short-term Debt [Line Items]	'	'	'
Year-end balance	$266,742	$320,478	$608,098
Federal Funds Purchased [Member]	'	'	'
Short-term Debt [Line Items]	'	'	'
Average amount outstanding	150,217	280,859	312,730
Weighted average rate	0.15%	0.19%	0.20%
Highest month-end balance	206,450	560,674	361,217
Year-end balance	129,131	175,468	214,224
Weighted average rate on outstandings at year-end	0.14%	0.13%	0.20%
Security Repurchase Agreements [Member]	'	'	'
Short-term Debt [Line Items]	'	'	'
Average amount outstanding	124,929	190,365	340,015
Weighted average rate	0.05%	0.04%	0.05%
Highest month-end balance	137,611	264,187	393,874
Year-end balance	$137,611	$145,010	$393,874
Weighted average rate on outstandings at year-end	0.05%	0.04%	0.06%

ShortTerm_Borrowings_Summary_O1

Short-Term Borrowings (Summary Of Other Short-Term Borrowings) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Short term senior medium term notes	$0	$4,951
Commercial paper	0	0
Other	0	458
Other short-term borrowings	$0	$5,409

LongTerm_Debt_Narrative_Detail

Long-Term Debt (Narrative) (Details) (USD $)

0 Months Ended

12 Months Ended

0 Months Ended

0 Months Ended

Share data in Millions, except Per Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

3-May-13

Jun. 21, 2012

Sep. 16, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Sep. 15, 2023

Dec. 31, 2013

Dec. 15, 2013

Nov. 15, 2018

15-May-14

Dec. 31, 2013

Series C Preferred Stock [Member]

Parent Company [Member]

4.00%

4.50%

Senior Medium-Term Note two point five five percent to five point five zero percent [Member]

Senior medium-term notes, optional early redemptions as of December 31, 2012 [Member]

Senior medium-term notes, optional early redemptions in 2013 [Member]

Senior medium-term notes, optional early redemptions in 2014 [Member]

Senior medium-term notes, optional early redemptions in 2015 [Member]

Junior subordinated debentures payable to ZCTB and Stockmen's Trust II and III [Member]

Medium-term Notes [Member]

Subordinated Notes Interest Rate 6.95 Percent [Member]

Subordinated Notes Interest Rate 6.95 Percent [Member]

Subordinated Notes Interest Rate 6.95 Percent [Member]

Subordinated Notes Interest Rate 5.65 Percent [Member]

Subordinated Notes Interest Rate 5.65 Percent [Member]

Subordinated Notes Interest Rate 5.65 Percent [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

New interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3mL+3.89%

'

'

'3mL+4.19%

'

'

Interest payments begin

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15-Dec-13

'

15-May-14

'

Earliest possible redemption date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

15-Sep-23

'

'

'

15-Nov-18

Remaining subordinated notes after exchanged, par value

$1,200,000,000

'

$1,200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Redeemed or Called During Period, Value

'

'

799,468,000

-1,542,500,000

'

'

'

800,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Subordinated debt converted to preferred stock

'

'

1,210,000

89,564,000

256,109,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Reduction of interest expenses on debt, amortization amount

3,800,000

7,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior medium-term notes

1,454,779,000

1,325,630,000

1,454,779,000

1,325,630,000

'

'

'

'

'

196,103,000

388,467,000

335,628,000

'

'

'

'

'

'

'

'

'

'

'

'

Senior medium-term notes with early redemption option

267,593,000

'

267,593,000

'

'

'

'

'

'

'

'

'

135,305,000

93,899,000

27,281,000

11,108,000

'

'

'

'

'

'

'

'

Subordinated debt repurchases from tender offer

'

'

250,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior debt repurchases from tender offer

'

'

258,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trust Preferred Securities Rate, Redeemed

'

'

'

'

'

8.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trust Preferred Securities, Shares Redeemed

'

'

'

'

'

11.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Liquidation Preference, Value

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Liquidation Preference Per Share

$1,000

'

$1,000

'

'

$25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Redemption Amount

'

'

'

'

'

285,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt extinguishment cost

'

'

120,192,000

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Redemption Premium

'

'

-45,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Write off of unamortized debt discount and issuance costs

'

'

-74,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Variable rate senior medium-term notes guaranteed under the FDIC's Temporary Liquidity Guarantee Program

'

'

'

'

'

'

254,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Federal home loan bank loan maturity range from

1-Jun-14

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Federal home loan bank loan maturity range to

1-Sep-41

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

FHLB advances interest rate, minimum

2.81%

'

2.81%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

FHLB advances interest rate, maximum

6.98%

'

6.98%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

FHLB advances weighted average interest rate on advances outstanding

4.50%

4.50%

4.50%

4.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt, Parent only maturities

$767,073,000

'

$767,073,000

'

'

'

'

'

$591,400,000

'

'

'

'

'

'

'

$15,500,000

$575,900,000

'

'

'

'

'

'

LongTerm_Debt_Schedule_Of_Long

Long-Term Debt (Schedule Of Long-Term Debt) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
Junior subordinated debentures related to trust preferred securities	$168,043	$461,858
Convertible subordinated notes	184,147	308,468
Subordinated notes	443,231	217,175
Senior medium-term notes	1,454,779	1,325,630
FHLB advances	22,736	23,300
Capital Lease Obligations	639	682
Long-term debt, total	$2,273,575	$2,337,113

LongTerm_Debt_Schedule_Of_Trus

Long-Term Debt (Schedule Of Trust Preferred Securities) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

Dec. 31, 2012

In Thousands, unless otherwise specified

Amegy Trust I [Member]

Amegy Trust II [Member]

Amegy Trust III [Member]

Stockmen's Trust II [Member]

Stockmen's Trust III [Member]

Intercontinental Statutory Trust I [Member]

Effective Interest Rate [Member]

Effective Interest Rate [Member]

Effective Interest Rate [Member]

Effective Interest Rate [Member]

Effective Interest Rate [Member]

Effective Interest Rate [Member]

Contractual Interest Rate [Member]

Contractual Interest Rate [Member]

Contractual Interest Rate [Member]

Contractual Interest Rate [Member]

Contractual Interest Rate [Member]

Contractual Interest Rate [Member]

Amegy Trust I [Member]

Amegy Trust II [Member]

Amegy Trust III [Member]

Stockmen's Trust II [Member]

Stockmen's Trust III [Member]

Intercontinental Statutory Trust I [Member]

Amegy Trust I [Member]

Amegy Trust II [Member]

Amegy Trust III [Member]

Stockmen's Trust II [Member]

Stockmen's Trust III [Member]

Intercontinental Statutory Trust I [Member]

Subordinated Borrowing [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Junior subordinated debentures related to trust preferred securities

$168,043

$461,858

$51,547

$36,083

$61,856

$7,732

$7,732

$3,093

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

'

'

'

'

3.09%

[1]

2.14%

[1]

2.02%

[1]

3.40%

[1]

3.13%

[1]

3.09%

[1]

'

'

'

'

'

'

Stated/contractual Interest Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'3mL+2.85%

[1]

'3mL+1.90%

[1]

'3mL+1.78%

[1]

'3mL+3.15%

[1]

'3mL+2.89%

[1]

'3mL+2.85%

[1]

Maturity

'

'

1-Dec-33

1-Oct-34

1-Dec-34

1-Mar-33

1-Mar-34

1-Mar-34

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Designation of b3mLb is three-month LIBOR; effective interest rate at the beginning of the accrual period commencing on or before DecemberB 31, 2013 is shown in parenthesis.

LongTerm_Debt_Schedule_Of_Subo

Long-Term Debt (Schedule Of Subordinated Notes) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013
In Thousands, unless otherwise specified			5.65% [Member]	6.00% [Member]	5.50% [Member]	Subordinated Notes Interest Rate 5.65 Percent [Member]	Subordinated Notes Interest Rate 6.95 Percent [Member]	3mL+1.25% [Member]
Subordinated Borrowing [Line Items]	'	'	'	'	'	'	'	'
Convertible subordinated notes, Balance	$184,147	$308,468	$70,218	$60,107	$53,822	'	'	'
Convertible subordinated notes, Par amount	226,591	'	75,704	79,292	71,595	'	'	'
Subordinated notes, Balance	443,231	217,175	30,494	33,697	54,149	162,000	87,891	75,000	[1],[2]
Subordinated Notes Par Amount	$439,508	'	$30,173	$32,366	$52,078	$162,000	$87,891	$75,000	[1],[2]
Subordinated notes, Maturity	'	'	1-May-14	1-Sep-15	1-Nov-15	1-Nov-23	1-Sep-28	1-Sep-14	[1],[2]
[1]	Issued by Amegy.
[2]	Designation of b3mLb is three-month LIBOR; effective interest rate at the beginning of the accrual period commencing on or before DecemberB 31, 2013 is shown in parenthesis.

LongTerm_Debt_Schedule_Of_Subo1

Long-Term Debt (Schedule Of Subordinated Debt Modification) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Instrument [Line Items]	'	'	'
Balance at beginning of year	$149,333	$224,206	$385,831
Discount amortization on convertible subordinated debt	-48,378	-43,341	-46,021
Accelerated discount amortization on convertible subordinated debt	-368	-31,532	-115,604
Accelerated discount amortization resulting from tender offer for debt repurchases	-58,143	0	0
Total amortization	-106,889	-74,873	-161,625
Balance at end of year	$42,444	$149,333	$224,206

LongTerm_Debt_Schedule_Of_Seni

Long-Term Debt (Schedule Of Senior Medium-Term Notes) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2012
In Thousands, unless otherwise specified			4.00%	7.75%	4.50%	Senior Medium-Term Notes four point five zero percent with maturity of June 2023 [Member]	Senior Medium-Term Note two point five five percent to five point five zero percent [Member]	Senior Medium-Term Note two point five five percent to five point five zero percent [Member]	Senior Medium-Term Note two point five five percent to five point five zero percent [Member]
								Maximum [Member]	Minimum [Member]
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'
Senior medium-term notes	$1,454,779	$1,325,630	$196,103	$235,382	$388,467	$299,199	$335,628	'	'
Senior medium-term notes, Par amount	'	'	$198,448	$240,769	$400,000	$300,000	$335,881	'	'
Senior medium-term notes, Maturity	'	'	'June 1, 2016	'September 1, 2014	'March 1, 2017	'June 1, 2023	'	'November 1, 2019	'February 1, 2014

LongTerm_Debt_Schedule_Of_Matu

Long-Term Debt (Schedule Of Maturities On Long-Term Debt) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Debt Instrument [Line Items]	'	'
2013	$460,825	'
2014	279,538	'
2015	318,057	'
2016	405,923	'
2017	38,346	'
Thereafter	767,073	'
Long-term debt, excluding associated hedges	2,269,762	'
Long-term debt (less fair value hedges)	2,273,575	2,337,113
Parent Company [Member]	'	'
Debt Instrument [Line Items]	'	'
2013	385,771	'
2014	279,482	'
2015	318,004	'
2016	405,865	'
2017	38,285	'
Thereafter	591,400	'
Long-term debt, excluding associated hedges	$2,018,807	'

Shareholders_Equity_Narrative_

Shareholders' Equity (Narrative) (Details) (USD $)

0 Months Ended

1 Months Ended

12 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

Sep. 16, 2013

Jun. 03, 2013

Jun. 30, 2009

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

3-May-13

Dec. 05, 2012

Dec. 31, 2013

Dec. 31, 2012

Sep. 16, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Jun. 15, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 05, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Series C Preferred Stock [Member]

Series C Preferred Stock [Member]

Series C Preferred Stock [Member]

Series D Preferred Stock [Member]

Series E Preferred Stock [Member]

Series F Preferred Stock [Member]

Series F Preferred Stock [Member]

Series G Preferred Stock [Member]

Series G Preferred Stock [Member]

Preferred Stock [Member]

Preferred Stock [Member]

Retained Earnings [Member]

Retained Earnings [Member]

Warrant [Member]

Common Stock [Member]

Common Stock [Member]

Common Stock [Member]

Schedule of Equity Method Investments [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax

'

'

'

$144,343,000

$93,213,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Liquidation preference of preferred stock (per share)

'

'

'

$1,000

'

'

'

$25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred stock, authorized shares

'

'

'

4,400,000

4,400,000

'

'

'

'

140,000,000

'

'

'

'

'

'

250,000,000

'

200,000,000

'

'

'

'

'

'

'

'

'

Variable dividend payment rate

'

'

'

'

'

'

'

'

'

'> of 4.0% or 3mL+0.52%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Carrying value, Preferred stock

'

'

'

1,003,970,000

1,128,302,000

'

'

'

'

66,127,000

60,220,000

'

0

924,332,000

'

'

143,750,000

143,750,000

171,827,000

0

'

'

'

'

'

'

'

'

Price per share

'

'

'

'

'

'

'

'

$36.27

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fees And Commissions For Sale Of Preferred Stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,800,000

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Dividend Rate, Percentage

'

'

'

'

'

'

'

'

'

'

'

'

9.50%

'

'

'

7.90%

'

6.30%

'

'

'

'

'

'

'

'

'

Debt Instrument, Redemption Price, Percentage

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Beneficial conversion feature of modified subordinated debt recorded in common stock

'

'

203,000,000

206,000

15,232,000

43,139,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

76,400,000

'

'

Preferred stock redemption

'

'

'

'

'

'

'

285,000,000

'

'

'

'

'

'

1,400,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Value, New Issues

'

'

'

784,318,000

141,342,000

25,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

800,000,000

143,750,000

'

'

'

-15,682,000

-2,408,000

25,048,000

Stock Issued During Period, Shares, New Issues

'

'

'

'

'

1,100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,067,540

Preferred Stock, Accretion of Redemption Discount

'

'

'

44,700,000

21,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock warrants issued to the U.S. Treasury

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5,789,909

'

'

'

Average price of common stock (per share)

'

'

'

'

'

$23.89

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock value, net of commissions and fees

'

'

'

'

'

25,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Warrants sold

'

'

'

'

'

'

29,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued for preferred stock redemption

'

'

'

799,468,000

-1,542,500,000

'

'

'

'

'

'

800,000,000

'

'

'

143,000,000

'

'

'

'

925,748,000

-1,542,500,000

-125,700,000

-3,830,000

'

-580,000

3,830,000

'

Stock Redeemed or Called During Period, Shares

799,467

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share Price

'

'

'

$36.63

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total invested assets of trusts

'

'

'

83,700,000

72,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total obligations of trusts

'

'

'

98,700,000

87,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax

'

'

'

-861,000

-5,063,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax

'

'

'

16,625,000

2,870,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred stock, liquidation preference per depositary share

'

'

'

$25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Ownership percentage of depositary shares

'

'

'

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders

'

4,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common Stock Held in Trust

'

'

'

$15,000,000

$15,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shareholders_Equity_Summary_Of

Shareholders' Equity (Summary Of Preferred Stock) (Details) (USD $)	0 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]	'	'	'
Common Stock Held in Trust	$15,000,000	$15,000,000	$15,000,000
Preferred stock, authorized shares	4,400,000	4,400,000	4,400,000
Carrying value, Preferred stock	1,003,970,000	1,003,970,000	1,128,302,000
Series A Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Rate	'	'> of 4.0% or 3mL+0.52%	'
Earliest redemption date	'	15-Dec-11	'
Preferred stock, authorized shares	140,000,000	140,000,000	'
Outstanding Shares at December 31, 2012	66,000,000	66,000,000	'
Carrying value, Preferred stock	66,127,000	66,127,000	60,220,000
Series C Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Carrying value, Preferred stock	0	0	924,332,000
Preferred Stock, Dividend Rate, Percentage	'	9.50%	'
Series F Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Earliest redemption date	'	15-Jun-17	'
Preferred stock, authorized shares	250,000,000	250,000,000	'
Outstanding Shares at December 31, 2012	143,750,000	143,750,000	'
Carrying value, Preferred stock	143,750,000	143,750,000	143,750,000
Preferred Stock, Dividend Rate, Percentage	'	7.90%	'
Series G Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Interest rate following earliest redemption date	'3mL+4.24%	'	'
Earliest redemption date	'	15-Mar-23	'
Preferred stock, authorized shares	200,000,000	200,000,000	'
Outstanding Shares at December 31, 2012	171,827,000	171,827,000	'
Carrying value, Preferred stock	171,827,000	171,827,000	0
Preferred Stock, Dividend Rate, Percentage	'	6.30%	'
Series H Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Earliest redemption date	'	15-Jun-19	'
Preferred stock, authorized shares	126,221,000	126,221,000	'
Outstanding Shares at December 31, 2012	126,221,000	126,221,000	'
Carrying value, Preferred stock	126,221,000	126,221,000	0
Preferred Stock, Dividend Rate, Percentage	'	5.75%	'
Series I Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Interest rate following earliest redemption date	'3mL+3.80%	'	'
Earliest redemption date	'	15-Jun-23	'
Preferred stock, authorized shares	300,893,000	300,893,000	'
Outstanding Shares at December 31, 2012	300,893,000	300,893,000	'
Carrying value, Preferred stock	300,893,000	300,893,000	0
Preferred Stock, Dividend Rate, Percentage	'	5.80%	'
Series J Preferred Stock [Member]	'	'	'
Schedule of Equity Method Investments [Line Items]	'	'	'
Interest rate following earliest redemption date	'3mL+4.44%	'	'
Earliest redemption date	'	15-Sep-23	'
Preferred stock, authorized shares	195,152,000	195,152,000	'
Outstanding Shares at December 31, 2012	195,152,000	195,152,000	'
Carrying value, Preferred stock	$195,152,000	$195,152,000	$0
Preferred Stock, Dividend Rate, Percentage	'	7.20%	'

Shareholders_Equity_Summary_Of1

Shareholders' Equity (Summary Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	($192,101)	'	'	'	($446,157)	'	'	'	($192,101)	($446,157)	($592,084)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax	'	'	'	'	'	'	'	'	144,343	93,213	'
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	'	'	'	'	'	'	'	'	-861	-5,063	'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	'	'	'	'	'	'	'	'	16,625	2,870	'
Other Comprehensive Income (Loss), Tax	'	'	'	'	'	'	'	'	160,107	91,020	'
Other comprehensive income (loss)	'	'	'	'	'	'	'	'	254,056	145,927	-130,788
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	'	'	'	'	'	'	147,794	90,180	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	'	'	'	'	'	'	106,262	55,747	'
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	142,977	193,416	198,583
Net earnings (loss) applicable to common shareholders	-59,437	209,707	55,385	88,324	35,605	62,322	55,215	25,489	293,979	178,631	153,390
Reclassification of amortization of net actuarial gains losses pension and post retirement from AOCI, gross	'	'	'	'	'	'	'	'	-8,127	-8,983	-5,149
Reclassification of amortization of prior service cost credit pension and postretirement from AOCI, gross	'	'	'	'	'	'	'	'	27	120	120
Reclassification of pension and postretirement from accumulated other comprehensive income, tax	'	'	'	'	'	'	'	'	-3,194	-3,497	-1,979
Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'	'	'	'	'	'	'	'
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-167,032	'	'	'	-397,616	'	'	'	-167,032	-397,616	-546,763
Other comprehensive income (loss)	'	'	'	'	'	'	'	'	230,584	149,147	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	'	'	'	'	'	'	127,648	90,924	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	'	'	'	'	'	'	102,936	58,223	13,262
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'	'	'	'	'	'	'	'	'	'
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-217	'	'	'	1,794	'	'	'	-217	1,794	9,404
Other comprehensive income (loss)	'	'	'	'	'	'	'	'	-2,011	-7,610	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	'	'	'	'	'	'	-431	232	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	'	'	'	'	'	'	-1,580	-7,842	'
Net earnings (loss) applicable to common shareholders	'	'	'	'	'	'	'	'	1,580	7,842	22,254
Accumulated Defined Benefit Plans Adjustment [Member]	'	'	'	'	'	'	'	'	'	'	'
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-24,852	'	'	'	-50,335	'	'	'	-24,852	-50,335	-54,725
Other comprehensive income (loss)	'	'	'	'	'	'	'	'	25,483	4,390	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	'	'	'	'	'	'	20,577	-976	'
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	'	'	'	'	'	'	4,906	5,366	3,050
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'	'	'	'	'	'	'	'
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Accretion Of Securities With Noncredit Related Impairment Losses	'	'	'	'	'	'	'	'	-2,106	-11,351	-665
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	-64,829	-40,156	-12,670
Net earnings (loss) applicable to common shareholders	'	'	'	'	'	'	'	'	-99,903	-63,564	-20,244
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	'	'	'	'	'	'	'	'	-164,732	-103,720	-32,914
Increase (Decrease) in Deferred Income Taxes	'	'	'	'	'	'	'	'	848	4,488	255
Fixed income securities gain loss [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'	'	'	'	'	'	'	'
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	'	'	'	'	'	'	'	'	-2,898	19,544	11,868
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	-1,123	7,340	4,476
Net earnings (loss) applicable to common shareholders	'	'	'	'	'	'	'	'	-1,775	12,204	7,392
Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'	'	'	'	'	'	'	'	'	'
Accumulated other comprehensive income [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Gain (Loss) on Derivative Instruments, Net, Pretax	'	'	'	'	'	'	'	'	2,647	13,062	37,273
Income Tax Expense (Benefit)	'	'	'	'	'	'	'	'	$1,067	$5,220	$15,019

Income_Taxes_Narrative_Details

Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investments, Owned, Federal Income Tax Note [Line Items]	'	'	'
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	$0	$11,337,000	$0
Effective income tax rate reconciliation, at federal statutory income tax rate	35.00%	'	'
Deferred tax assets, valuation allowance	'	4,261,000	'
Deferred tax assets net operating loss and tax credit carryforwards expiring through 2030	1,800,000	'	'
Year which tax effect of remaining net operating loss and tax credit carryforwards expire	'2030	'	'
Allocation of tax credit authority under community development financial institution fund	100,000,000	'	'
Income tax expenses reduced resulting from tax credit	600,000	1,200,000	2,400,000
Unrecognized tax benefits that would impact on effective tax rate	1,600,000	1,600,000	'
Gross unrecogized tax benefits that may decrease during the 12 subsequent months	0	'	'
Income tax expense reduced by net amount including interest, due to lapses in statutes of limitations	0	0	-1,644,000
Accrued interest and penalties recognized net of federal and/or state tax benefits	300,000	300,000	'
Year thru which company is no longer subject to income tax examinations	'2007	'	'
Reduction of Income Tax Expense Due to Lapses in Statutes of Limitations [Member]	'	'	'
Investments, Owned, Federal Income Tax Note [Line Items]	'	'	'
Income tax expense reduced by net amount including interest, due to lapses in statutes of limitations	'	$2,300,000	$1,200,000

Income_Taxes_Schedule_Of_Incom

Income Taxes (Schedule Of Income Taxes (Benefit)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'	'	'
Current Federal, Income taxes (benefit)	$173,418	$185,404	$62,810
Deferred Federal Income taxes (benefit)	-51,475	-20,086	106,902
Federal Income taxes (benefit) total	121,943	165,318	169,712
Current State, Income taxes (benefit)	29,676	-1,775	20,169
Deferred State, Income taxes (benefit)	-8,642	29,873	8,702
State Income taxes (benefit) total	21,034	28,098	28,871
Income Tax Expense (Benefit), Total	$142,977	$193,416	$198,583

Income_Taxes_Schedule_Of_Statu

Income Taxes (Schedule Of Statutory Federal Income Tax Rate Reconciles To Actual Income Tax Expense (Benefit)) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'	'	'
Income tax expense (benefit) at statutory federal rate	$142,251	$189,548	$182,446
State income taxes, net	13,672	18,264	18,766
Other nondeductible expenses	2,574	11,291	24,361
Nontaxable income	-17,071	-20,137	-19,691
Tax credits and other taxes	-2,628	-3,172	-5,977
Other	4,179	-2,378	-1,322
Income Tax Expense (Benefit), Total	$142,977	$193,416	$198,583

Income_Taxes_Schedule_Of_Tax_E

Income Taxes (Schedule Of Tax Effects Of Deferred Tax Assets And Deferred Tax Liabilities) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Income Taxes [Abstract]	'	'
Gross deferred tax assets, Book loan loss deduction in excess of tax	$315,025	$372,206
Gross deferred tax assets, Pension and postretirement	16,380	33,105
Gross deferred tax assets, Deferred compensation	85,846	79,921
Gross deferred tax assets, Other real estate owned	7,099	16,306
Gross deferred tax assets, Security investments and derivative fair value adjustments	155,900	247,770
Gross deferred tax assets, Net operating losses, capital losses and tax credits	6,111	36,600
FDIC Supported Transactions	10,488	0
Gross deferred tax assets, Other	44,450	42,324
Gross deferred tax assets	641,299	828,232
Gross deferred tax assets, Valuation allowance	'	-4,261
Total deferred tax assets	637,038	823,971
Gross deferred tax liabilities, Core deposits and purchase accounting	-13,556	-24,185
Gross deferred tax liabilities, Premises and equipment, due to differences in depreciation	-13,014	-16,258
Gross deferred tax liabilities, FHLB stock dividends	-12,668	-13,423
Gross deferred tax liabilities, Leasing operations	-94,637	-111,265
Gross deferred tax liabilities, Prepaid expenses	-8,909	-7,057
Gross deferred tax liabilities, Prepaid pension reserves	-16,909	-18,350
Gross deferred tax liabilities, Subordinated debt modification	-148,820	-185,733
Gross deferred tax liabilities, Deferred loan fees	-21,591	-21,209
Gross deferred tax liabilities, FDIC-supported transactions	0	-17,957
Gross deferred tax liabilities, Other	-2,553	-2,929
Total deferred tax liabilities	-332,657	-418,366
Net deferred tax assets	$304,381	$405,605

Income_Taxes_Schedule_Of_Recon

Income Taxes (Schedule Of Reconciliation Of Gross Unrecognized Tax Benefits) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]	'	'	'
Balance at beginning of year	$2,385	$13,722	$15,366
Tax positions related to current year, Additions	0	0	0
Tax positions related to current year, Reductions	0	0	0
Tax positions related to prior years, Additions	0	0	0
Tax positions related to prior years, Reductions	0	-11,337	0
Tax Adjustments, Settlements, and Unusual Provisions	0	0	0
Lapses in statutes of limitations	0	0	-1,644
Balance at end of year	$2,385	$2,385	$13,722

Net_Earnings_Per_Common_Share_

Net Earnings Per Common Share (Basic And Diluted Net Earnings Per Common Share Based On The Weighted Average Outstanding Shares) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net income (loss) applicable to controlling interest	($41,472)	$111,514	$83,026	$110,723	'	'	'	'	$263,791	$349,516	$323,804
Less common and preferred dividends, Basic	'	'	'	'	'	'	'	'	6,094	-178,277	-177,775
Undistributed earnings (loss), Basic	'	'	'	'	'	'	'	'	269,885	171,239	146,029
Less undistributed earnings applicable to nonvested restricted shares, Basic	'	'	'	'	'	'	'	'	2,832	1,600	1,300
Undistributed earnings (loss) applicable to nonvested shares, Basic	'	'	'	'	'	'	'	'	267,053	169,639	144,729
Distributed earnings applicable to common shares, Basic	'	'	'	'	'	'	'	'	23,916	7,321	7,292
Net earnings (loss) applicable to common shareholders	'	'	'	'	'	'	'	'	290,969	176,960	152,021
Weighted average common shares outstanding	'	'	'	'	'	'	'	'	183,844	183,081	182,393
Net earnings (loss) per common share, Basic	($0.32)	$1.13	$0.30	$0.48	$0.19	$0.34	$0.30	$0.14	$1.58	$0.97	$0.83
Additional undistributed earnings allocated to incremental shares, Diluted	'	'	'	'	'	'	'	'	0	0	41
Diluted earnings (loss) applicable to common shares, Diluted	'	'	'	'	'	'	'	'	290,969	176,960	152,062
Additional weighted average dilutive shares, Diluted	'	'	'	'	'	'	'	'	453	155	212
Weighted average diluted common shares outstanding, Diluted	'	'	'	'	'	'	'	'	184,297	183,236	182,605
Net earnings (loss) per common share, Diluted	($0.32)	$1.12	$0.30	$0.48	$0.19	$0.34	$0.30	$0.14	$1.58	$0.97	$0.83
Stock Redeemed or Called During Period, Value	'	'	'	'	'	'	'	'	799,468	-1,542,500	'
Retained Earnings [Member]	'	'	'	'	'	'	'	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Stock Redeemed or Called During Period, Value	'	'	'	'	'	'	'	'	($125,700)	($3,830)	'

ShareBased_Compensation_Narrat

Share-Based Compensation (Narrative) (Details) (USD $)

0 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

In Millions, except Share data, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Mar. 31, 2013

Mar. 15, 2013

Dec. 15, 2012

Sep. 30, 2012

Jan. 15, 2012

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

The Commerce Bank Of Oregon [Member]

Maximum [Member]

Minimum [Member]

Director [Member]

Director [Member]

Director [Member]

Director [Member]

The Commerce Bank Of Oregon [Member]

The Commerce Bank Of Oregon [Member]

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

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted Stock expected to vest

400,124

'

'

400,124

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted Stock Units expected to vest

1,146,807

'

'

1,146,807

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share Based Compensation Restricted Stock Awards Aggregate Intrinsic Value

$12

'

'

$12

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share Based Compensation Restricted Stock Units Aggregate Intrinsic Value

34.4

'

'

34.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Exercise Price

$24.38

'

'

$24.38

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term

'5 years 9 months 18 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Aggregate Intrinsic Value

9.7

'

'

9.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted Stock Units Outstanding

1,522,038

822,753

146,165

1,522,038

822,753

146,165

0

'

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Grant Price of Restricted Stock Forfeited

'

'

'

$20.13

$20.22

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price

$35.54

$38.87

$43.06

$35.54

$38.87

$43.06

$47.37

'

'

'

'

'

'

$20.58

$17.85

'

'

'

'

Common stock, outstanding shares

184,677,696

184,199,198

'

184,677,696

184,199,198

'

'

'

'

'

'

'

1,038,000

'

'

'

'

'

'

Stock Options without a fixed expiration date

21,250

'

'

21,250

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Granted Salary Share Units - Share Settled

'

'

'

'

456,275

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total shares authorized under stock option and incentive plan

19,500,000

'

'

19,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Number of shares available for future grants of stock options or restricted stock

5,696,668

'

'

5,696,668

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Compensation expense not yet recognized for nonvested share-based awards

25.2

'

'

25.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Nonvested share-based awards, expected weighted average period to be recognized, years

'2 years 4 months 24 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options

'

'

'

0.3

2.8

2.8

'

'

'

'

'

'

'

'

'

'

'

'

'

Total intrinsic value of stock options exercised

'

'

'

4

0.7

0.4

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash received from the exercise of stock options

'

'

'

9.8

1.9

0.6

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of outstanding stock options

23.6

5.4

'

23.6

5.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Aggregate intrinsic value of exercisable options

13.7

3.2

'

13.7

3.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Outstanding stock options, Weighted average remaining contractual life (years)

'2 years 1 month 6 days

'2 years 7 months 6 days

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number

1,729,543

'

'

1,729,543

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number

5,874,590

5,962,325

5,933,870

5,874,590

5,962,325

5,933,870

6,369,239

'

'

'

'

'

44,100

'

'

'

'

'

'

Total fair value of restricted stock vesting

'

'

'

13.1

15.5

17.6

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted average issue price

$24.55

$17.57

$23.43

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total fair value granted

'

'

'

13.1

15.5

17.6

'

'

'

'

'

'

'

'

'

'

'

'

'

Granted Salary Share Units Cash Settled

'

'

'

'

'

297,620

'

'

'

'

'

'

'

'

'

'

'

'

'

Settled Salary Share Units - Cash Settled

'

'

'

'

'

'

'

231,061

'

125,070

225,214

172,550

'

'

'

'

'

'

'

Cash Paid for Salary Share Units

'

'

'

'

'

'

'

'

$5.70

$2.70

$4.50

$3.20

'

'

'

'

'

'

'

Stock Issued During Period, Shares, Restricted Stock Award, Gross

'

'

'

56,774

87,480

616,234

'

'

'

'

'

'

'

'

'

'

17,444

25,536

26,433

Restricted Stock Units Granted

'

'

'

949,418

726,779

'

146,165

'

'

'

'

'

'

'

'

7,296

4,984

'

'

Weighted Average Grant Price of Restricted Stock Units Granted

'

'

'

$25.99

$18.29

$23.69

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted Stock Units Vested

'

'

'

-160,580

-34,885

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Grant Price of Restricted Stock Units Vested

'

'

'

$20.17

$22.46

'

'

'

'

'

'

'

'

'

'

'

'

'

'

ShareBased_Compensation_Compen

Share-Based Compensation (Compensation Expense And Related Tax Benefit For All Share-Based Awards) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation [Abstract]	'	'	'
Compensation expense	$28,052	$31,533	$29,019
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense	$9,123	$10,724	$9,768

ShareBased_Compensation_Weight

Share-Based Compensation (Weighted Average Of Fair Value And Significant Assumptions Used In Applying Black-Scholes Model For Options Granted) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share-based Compensation [Abstract]	'	'	'
Weighted average of fair value for options granted	$6.79	$4.88	$5.78
Expected dividend yield	1.30%	1.50%	1.00%
Expected volatility	32.50%	35.00%	30.00%
Risk-free interest rate	0.78%	0.67%	1.46%
Expected life (in years)	'4 years 6 months	'4 years 6 months	'4 years 6 months

ShareBased_Compensation_Summar

Share-Based Compensation (Summary Of Stock Option Activity) (Details) (USD $)	0 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Balance, Number of shares	'	'	'	5,962,325	5,933,870	6,369,239
Balance, Weighted average exercise price	'	'	'	$38.87	$43.06	$47.37
Granted, Number of shares	'	'	'	1,047,781	867,968	800,057
Granted, Weighted average exercise price	$27.41	$18.87	$23.46	'	'	'
Exercised, Number of shares	'	'	'	488,479	129,616	46,749
Exercised, Weighted average exercise price	$20.11	$14.64	$13.60	'	'	'
Expired, Number of shares	'	'	'	574,157	568,546	1,080,867
Expired, Weighted average exercise price	$70.12	$61.90	$57.27	'	'	'
Forfeited, Number of shares	'	'	'	72,880	141,351	107,810
Forfeited, Weighted average exercise price	$22.25	$21.36	$22.74	'	'	'
Balance, Number of shares	5,874,590	5,962,325	5,933,870	5,874,590	5,962,325	5,933,870
Balance, Weighted average exercise price	$35.54	$38.87	$43.06	$35.54	$38.87	$43.06
Outstanding stock options exercisable, Number of shares	4,101,928	4,379,630	4,211,216	4,101,928	4,379,630	4,211,216
Outstanding stock options exercisable, Weighted average exercise price	$40.40	$45.26	$51.26	$40.40	$45.26	$51.26

ShareBased_Compensation_Schedu

Share-Based Compensation (Schedule Of Additional Selected Information On Stock Options) (Details) (USD $)	0 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	5,874,590	5,962,325	5,874,590	5,933,870	6,369,239
Outstanding stock options, Weighted average exercise price	$35.54	$38.87	$35.54	$43.06	$47.37
share-based compensation award, options, outstanding, weighted average remaining contractual term	'	'	'3 years 2 months 12 days	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'2 years 1 month 6 days	'2 years 7 months 6 days	'	'	'
Exercisable stock options, Number of shares	4,101,928	4,379,630	4,101,928	4,211,216	'
Exercisable stock options, Weighted average exercise price	$40.40	$45.26	$40.40	$51.26	'
Exercise Price Range $0.32 To $19.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	1,006,608	'	1,006,608	'	'
Outstanding stock options, Weighted average exercise price	$17.39	'	$17.39	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'4 years 6 months	'	'
Exercisable stock options, Number of shares	479,584	'	479,584	'	'
Exercisable stock options, Weighted average exercise price	$15.81	'	$15.81	'	'
Exercise Price Range $20.00 To $24.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	1,170,680	'	1,170,680	'	'
Outstanding stock options, Weighted average exercise price	$23.84	'	$23.84	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'3 years 9 months 18 days	'	'
Exercisable stock options, Number of shares	925,953	'	925,953	'	'
Exercisable stock options, Weighted average exercise price	$23.86	'	$23.86	'	'
Exercise Price Range $25.00 To $29.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	1,637,911	'	1,637,911	'	'
Outstanding stock options, Weighted average exercise price	$27.68	'	$27.68	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'4 years 6 months	'	'
Exercisable stock options, Number of shares	637,000	'	637,000	'	'
Exercisable stock options, Weighted average exercise price	$27.96	'	$27.96	'	'
Exercise Price Range $30.00 To $39.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	10,000	'	10,000	'	'
Outstanding stock options, Weighted average exercise price	$32.45	'	$32.45	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'1 year 6 months	'	'
Exercisable stock options, Number of shares	10,000	'	10,000	'	'
Exercisable stock options, Weighted average exercise price	$32.45	'	$32.45	'	'
Exercise Price Range $40.00 To $44.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	14,000	'	14,000	'	'
Outstanding stock options, Weighted average exercise price	$41.69	'	$41.69	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'1 year 9 months 18 days	'	'
Exercisable stock options, Number of shares	14,000	'	14,000	'	'
Exercisable stock options, Weighted average exercise price	$41.69	'	$41.69	'	'
Exercise Price Range $45.00 To $49.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	1,303,896	'	1,303,896	'	'
Outstanding stock options, Weighted average exercise price	$47.28	'	$47.28	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'1 year 4 months 24 days	'	'
Exercisable stock options, Number of shares	1,303,896	'	1,303,896	'	'
Exercisable stock options, Weighted average exercise price	$47.28	'	$47.28	'	'
Exercise Price Range $50.00 To $59.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	136,531	'	136,531	'	'
Outstanding stock options, Weighted average exercise price	$57.90	'	$57.90	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'1 year	'	'
Exercisable stock options, Number of shares	136,531	'	136,531	'	'
Exercisable stock options, Weighted average exercise price	$57.90	'	$57.90	'	'
Exercise Price Range $60.00 To $79.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	124,817	'	124,817	'	'
Outstanding stock options, Weighted average exercise price	$68.44	'	$68.44	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'9 months 18 days	'	'
Exercisable stock options, Number of shares	124,817	'	124,817	'	'
Exercisable stock options, Weighted average exercise price	$68.44	'	$68.44	'	'
Exercise Price Range $80.00 To $81.99 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	36,500	'	36,500	'	'
Outstanding stock options, Weighted average exercise price	$80.65	'	$80.65	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'2 years 3 months 18 days	'	'
Exercisable stock options, Number of shares	36,500	'	36,500	'	'
Exercisable stock options, Weighted average exercise price	$80.65	'	$80.65	'	'
Exercise Price Range $82.00 To $83.38 [Member]	'	'	'	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'
Outstanding stock options, Number of shares	433,647	'	433,647	'	'
Outstanding stock options, Weighted average exercise price	$83.25	'	$83.25	'	'
Outstanding stock options, Weighted average remaining contractual life (years)	'	'	'7 months 6 days	'	'
Exercisable stock options, Number of shares	433,647	'	433,647	'	'
Exercisable stock options, Weighted average exercise price	$83.25	'	$83.25	'	'

ShareBased_Compensation_Summar1

Share-Based Compensation (Summary Of Restricted Stock Activity) (Details) (USD $)	0 Months Ended			12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation [Abstract]	'	'	'	'	'	'	'
Nonvested restricted shares, Number of shares	410,950	851,236	1,399,854	410,950	851,236	1,399,854	1,611,643
Nonvested restricted shares, Weighted average issue price	$22.46	$22.07	$23.74	$22.46	$22.07	$23.74	$26.30
Issued, Number of shares	'	'	'	56,774	87,480	616,234	'
Issued, Weighted average issue price	$24.55	$17.57	$23.43	'	'	'	'
Vested, Number of shares	'	'	'	452,743	582,361	569,794	'
Vested, Weighted average issue price	$21.80	$25.34	$30.43	'	'	'	'
Forfeited, Number of shares	'	'	'	44,317	53,737	258,229	'
Forfeited, Weighted average issue price	$24.31	$22.83	$24.23	'	'	'	'

ShareBased_Compensation_Share_

Share-Based Compensation Share Based Compensation (Summmary of Restricted Stock Unit Activity) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Restricted Stock Units Outstanding	1,522,038	822,753	146,165	0
Weighted Average Grant Price of Restricted Stock Units	$23.19	$19.04	$23.69	$0
Restricted Stock Units Granted	949,418	726,779	'	146,165
Weighted Average Grant Price of Restricted Stock Units Granted	$25.99	$18.29	$23.69	'
Restricted Stock Units Vested	-160,580	-34,885	'	'
Restricted Stock Units Forfeited	-89,553	-15,306	'	'
Weighted Average Grant Price of Restricted Stock Units Vested	$20.17	$22.46	'	'
Weighted Average Grant Price of Restricted Stock Forfeited	$20.13	$20.22	'	'

Guarantees_Commitments_And_Con

Guarantees, Commitments And Contingencies (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Guarantor Obligations [Line Items]	'	'	'
Operating Leases, Future Minimum Payments, Due in Three Years	$42,712,000	'	'
Operating Leases, Future Minimum Payments, Due in Four Years	37,071,000	'	'
Operating Leases, Future Minimum Payments, Due in Five Years	32,186,000	'	'
Operating Leases, Future Minimum Payments Due, Next Twelve Months	44,857,000	'	'
Operating Leases, Future Minimum Payments, Due Thereafter	135,869,000	'	'
Commitments to Extend Credit Expiring in One Year	4,400,000,000	'	'
standby letters of credit expiring in one year	644,000,000	'	'
Standby Letters of Credit, Thereafter	295,000,000	'	'
Guarantor Obligations, Current Carrying Value	8,800,000	'	'
Reserve for Unfunded Lending Commitments	5,500,000	'	'
Letters of Credit, Deferred Commitment Fees	3,300,000	'	'
Private Equity and other noninterest bearing investments [Table Text Block]	28,300,000	'	'
Risk-weighted values assigned to all off-balance sheet financial and derivative instruments	5,600,000,000	5,000,000,000	'
Cash Reserve Deposit Required and Made	179,100,000	'	'
Guarantee Of Trust Preferred Securities Issued By Affiliated Trusts	15,000,000	'	'
Capital Lease Obligations, Current	1,700,000	'	'
Accumulated Amortization, Deferred Finance Costs	1,300,000	'	'
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals	1,100,000	'	'
Future Minimum Sublease Rentals, Sale Leaseback Transactions, within Two Years	1,300,000	'	'
Future Minimum Sublease Rentals, Sale Leaseback Transactions, within Three Years	1,400,000	'	'
Operating Leases, Future Minimum Payments Receivable, in Four Years	1,600,000	'	'
Operating Leases, Future Minimum Payments Receivable, in Five Years	1,600,000	'	'
Operating Leases, Future Minimum Payments Receivable, Thereafter	6,300,000	'	'
Operating Leases, Rent Expense, Net	58,400,000	58,700,000	57,900,000
Loss Contingency, Range of Possible Loss, Minimum	0	'	'
Loss Contingency, Range of Possible Loss, Maximum	$50,000,000	'	'

Guarantees_Commitments_And_Con1

Guarantees, Commitments And Contingencies (Schedule Of Guarantees Issued) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Guarantor Obligations [Line Items]	'	'
Unused Commitments to Extend Credit	$16,174,326	$14,277,347
Commercial letters of credit	80,218	91,978
Total Unfunded Lending Commitments	17,193,840	15,333,781
Financial Guarantee [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Letters Of Credit Standby	779,811	774,427
Performance Guarantee [Member]	'	'
Guarantor Obligations [Line Items]	'	'
Letters Of Credit Standby	$159,485	$190,029

Regulatory_Matters_Summary_Of_

Regulatory Matters (Summary Of Actual Capital Amounts And Ratios For The Company And Its Three Largest Subsidiary Banks) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Total capital (to risk-weighted assets), Actual Amount	$6,621,539	$6,616,521
Capital to Risk Weighted Assets	15.00%	15.05%
Total capital (to risk-weighted assets), To be well capitalized, Amount	4,514,553	4,396,983
Total capital (to risk-weighted assets), To be well capitalized, Ratio	10.00%	10.00%
Tier 1 capital (to risk-weighted assets), Actual Amount	5,763,463	5,883,669
Tier 1 capital (to risk-weighted assets), Actual Ratio	1277.00%	1338.00%
Tier 1 capital (to risk-weighted assets), To be well capitalized, Ratio	600.00%	600.00%
Tier 1 capital (to average assets), Actual Ratio	1048.00%	1096.00%
Parent [Member]	'	'
Tier 1 capital (to risk-weighted assets), Actual Amount	5,763,463	5,883,669
Tier 1 capital (to risk-weighted assets), To be well capitalized, Amount	2,708,732	2,638,190
Zions First National Bank [Member]	'	'
Total capital (to risk-weighted assets), Actual Amount	1,997,525	2,034,662
Capital to Risk Weighted Assets	1452.00%	1417.00%
Total capital (to risk-weighted assets), To be well capitalized, Amount	1,375,347	1,435,690
Total capital (to risk-weighted assets), To be well capitalized, Ratio	1000.00%	1000.00%
Tier 1 capital (to risk-weighted assets), Actual Amount	1,831,720	1,861,218
Tier 1 capital (to risk-weighted assets), Actual Ratio	1332.00%	1296.00%
Tier 1 capital (to risk-weighted assets), To be well capitalized, Amount	825,208	861,414
Tier 1 capital (to risk-weighted assets), To be well capitalized, Ratio	600.00%	600.00%
Tier 1 capital (to average assets), Actual Ratio	1002.00%	1058.00%
Tier One Leverage Capital Required to be Well Capitalized	913,592	879,719
Tier 1 capital (to average assets), To be well capitalized, Ratio	500.00%	500.00%
CB&T [Member]	'	'
Total capital (to risk-weighted assets), Actual Amount	1,252,860	1,222,822
Capital to Risk Weighted Assets	1365.00%	1418.00%
Total capital (to risk-weighted assets), To be well capitalized, Amount	917,950	862,218
Total capital (to risk-weighted assets), To be well capitalized, Ratio	1000.00%	1000.00%
Tier 1 capital (to risk-weighted assets), Actual Amount	1,137,848	1,114,315
Tier 1 capital (to risk-weighted assets), Actual Ratio	1240.00%	1292.00%
Tier 1 capital (to risk-weighted assets), To be well capitalized, Amount	550,770	517,331
Tier 1 capital (to risk-weighted assets), To be well capitalized, Ratio	600.00%	600.00%
Tier 1 capital (to average assets), Actual Ratio	1075.00%	1037.00%
Tier One Leverage Capital Required to be Well Capitalized	529,067	537,534
Tier 1 capital (to average assets), To be well capitalized, Ratio	500.00%	500.00%
Amegy Bank N.A. [Member]	'	'
Total capital (to risk-weighted assets), Actual Amount	1,714,314	1,598,708
Capital to Risk Weighted Assets	1486.00%	1517.00%
Total capital (to risk-weighted assets), To be well capitalized, Amount	1,153,382	1,054,110
Total capital (to risk-weighted assets), To be well capitalized, Ratio	1000.00%	1000.00%
Tier 1 capital (to risk-weighted assets), Actual Amount	1,569,696	1,466,001
Tier 1 capital (to risk-weighted assets), Actual Ratio	1361.00%	1391.00%
Tier 1 capital (to risk-weighted assets), To be well capitalized, Amount	692,029	632,466
Tier 1 capital (to risk-weighted assets), To be well capitalized, Ratio	600.00%	600.00%
Tier 1 capital (to average assets), Actual Ratio	1209.00%	1203.00%
Tier One Leverage Capital Required to be Well Capitalized	$649,387	$609,319
Tier 1 capital (to average assets), To be well capitalized, Ratio	500.00%	500.00%

Retirement_Plans_Schedule_Of_N

Retirement Plans (Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Interest cost	$6,885	$7,558	$8,336
Expected return on plan assets	12,109	11,308	12,443
Defined Benefit Plan, Amortization of Gains (Losses)	8,132	9,184	5,290
Defined Benefit Plan, Fair Value of Plan Assets	171,905	157,082	'
Settlement loss - net periodic benefit cost (credit)	1,814	'	'
Pension Benefits [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Net gain (loss) in AOCI expected to be recognized in next year	-3,187	'	'
Defined Benefit Plan, Benefit Obligation	169,092	191,208	184,141
Service cost	0	29	100
Interest cost	6,885	7,558	'
Defined Benefit Plan, Actuarial Net (Gains) Losses	-16,341	9,693	'
Defined Benefit Plan, Fair Value of Plan Assets	171,905	157,082	147,444
Defined Benefit Plan, Actual Return on Plan Assets	27,579	19,851	'
Defined Benefit Plan, Contributions by Employer	0	0	'
Defined Benefit Plan, Benefits Paid	-12,756	-10,213	'
Defined Benefit Plan, Funded Status of Plan	2,813	-34,126	'
Prior service credit (cost) in AOCI expected to be recognized in the next year	0	'	'
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	-3,187	'	'
Defined Benefit Plan, Net Periodic Benefit Cost	4,722	5,463	1,283
Supplemental Employee Retirement Plan, Defined Benefit [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Net gain (loss) in AOCI expected to be recognized in next year	-33	'	'
Defined Benefit Plan, Benefit Obligation	10,276	11,234	11,357
Service cost	0	0	'
Interest cost	404	460	'
Defined Benefit Plan, Amortization of Gains (Losses)	70	-114	'
Amortization of prior service cost (credit)	124	124	'
Defined Benefit Plan, Actuarial Net (Gains) Losses	-426	481	'
Defined Benefit Plan, Fair Value of Plan Assets	0	0	0
Defined Benefit Plan, Actual Return on Plan Assets	0	0	'
Defined Benefit Plan, Contributions by Employer	936	1,064	'
Defined Benefit Plan, Benefits Paid	-936	-1,064	'
Defined Benefit Plan, Funded Status of Plan	-10,276	-11,234	'
Prior service credit (cost) in AOCI expected to be recognized in the next year	-50	'	'
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	-83	'	'
Settlement loss - net periodic benefit cost (credit)	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	598	470	666
Supplemental Employee Retirement Plans Defined Benefit [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Service cost	'	'	0
Interest cost	'	'	558
Defined Benefit Plan, Amortization of Gains (Losses)	'	'	-16
Amortization of prior service cost (credit)	'	'	124
Postretirement Benefits [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Net gain (loss) in AOCI expected to be recognized in next year	71	'	'
Defined Benefit Plan, Benefit Obligation	1,062	1,129	1,149
Service cost	32	36	32
Interest cost	41	47	54
Defined Benefit Plan, Amortization of Gains (Losses)	-75	-87	-125
Amortization of prior service cost (credit)	-151	-244	-244
Defined Benefit Plan, Actuarial Net (Gains) Losses	-53	-27	'
Defined Benefit Plan, Fair Value of Plan Assets	0	0	0
Defined Benefit Plan, Actual Return on Plan Assets	0	0	'
Defined Benefit Plan, Contributions by Employer	87	76	'
Defined Benefit Plan, Benefits Paid	-87	-76	'
Defined Benefit Plan, Funded Status of Plan	-1,062	-1,129	'
Prior service credit (cost) in AOCI expected to be recognized in the next year	0	'	'
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year	71	'	'
Defined Benefit Plan, Net Periodic Benefit Cost	($153)	($248)	($283)

Retirement_Plans_Narrative_Det

Retirement Plans (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Composite market value factor, minimum range	0.988035	1.02972	'
Composite market value factor, maximum range	1.073235	1.119776	'
Fair Value Level Transfers Among Levels 1, 2, and 3	$0	$0	'
Owner Occupied And Commercial Real Estate Loans Unamortized Premiums	47,200,000	59,300,000	'
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year	0	'	'
Benefit liability other supplement retirement plans	6,000,000	6,300,000	'
Shares of company common stock	270,305	321,964	'
Dividends received under the plan	41,000	15,000	'
Rate of employee contribution from earnings	80.00%	'	'
Matching contribution allocation rate first time	0.00%	'	'
Employee contribution rate for first time matching	0.00%	'	'
Matching contribution allocation rate second time	50.00%	'	'
Employees contribution rate for second time matching	0.00%	'	'
Employer contribution in common stock	22,700,000	21,600,000	21,000,000
Minimum range of eligible compensation for noncontributory profit sharing feature	0.00%	'	'
Maximum range of eligible compensation for noncontributory profit sharing feature	0.00%	'	'
Accrued profit sharing expense	11,804,000	11,783,000	11,700,000
Contribution rate of profit sharing expenses	0	'	'
Composite market value factor, at end of period	1.05329	1.08063	'
Pension Benefits [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Settlements, Benefit Obligation	96,000	0	'
Defined Benefit Plan, Expected Future Benefit Payments in Year One	10,338,000	'	'
Liability for pension/postretirement benefits	2,813,000	-34,126,000	'
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-39,082,000	-80,743,000	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	-39,082,000	-80,743,000	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax	0	0	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	9,822,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	9,547,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	10,133,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	10,543,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	53,674,000	'	'
Supplemental Employee Retirement Plan, Defined Benefit [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Settlements, Benefit Obligation	0	0	'
Defined Benefit Plan, Expected Future Benefit Payments in Year One	2,056,000	'	'
Liability for pension/postretirement benefits	-10,276,000	-11,234,000	'
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	-1,968,000	-2,587,000	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	-1,918,000	-2,412,000	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax	-50,000	-175,000	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	833,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	1,073,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	799,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	794,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	3,642,000	'	'
Postretirement Benefits [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Benefit Plan, Settlements, Benefit Obligation	0	0	'
Defined Benefit Plan, Expected Future Benefit Payments in Year One	96,000	'	'
Liability for pension/postretirement benefits	-1,062,000	-1,129,000	'
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	354,000	526,000	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Gains (Losses), before Tax	354,000	376,000	'
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), Net Prior Service Cost (Credit), before Tax	0	150,000	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	100,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	105,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	109,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	106,000	'	'
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter	451,000	'	'
Defined Benefit Plans and Other Postretirement Benefit Plans [Domain]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair Value Level Transfers Among Levels 1, 2, and 3	$0	$0	'
Equity Securities [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Target investment allocation percentage in equity	65.00%	'	'
Debt Securities [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Target investment allocation percentage in equity	30.00%	'	'
Real Estate [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Target investment allocation percentage in equity	5.00%	'	'

Retirement_Plans_Summary_Of_Re

Retirement Plans (Summary Of Reconciliation Of The Beginning And Ending Balances Of Assets Measured At Fair Value On A Recurring Basis Using Level 3 Inputs) (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

In Thousands, unless otherwise specified

Limited Partner [Member]

Limited Partner [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Realized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Realized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Realized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Realized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Unrealized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Unrealized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Unrealized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Unrealized Appreciation (Depreciation) In Fair Value Of Investments [Member]

Interest And Dividends [Member]

Interest And Dividends [Member]

Interest And Dividends [Member]

Interest And Dividends [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Limited Partnerships [Member]

Limited Partnerships [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of plan assets at beginning of year

$171,905

$157,082

'

'

'

'

$4,689

'

$13,869

'

'

'

'

'

'

'

'

'

'

'

'

'

$139,374

$120,379

$5,292

$4,689

$4,149

$12,582

$13,869

$12,476

$17,874

$18,558

$5,292

$4,689

$12,582

$13,869

Net increases (decreases) included in plan statement of changes in net assets available for benefits

'

'

'

'

'

'

'

'

'

'

-74

-98

0

0

732

542

-398

372

0

0

486

525

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair value of plan assets at end of year

171,905

157,082

'

'

'

'

5,292

4,689

12,582

13,869

'

'

'

'

'

'

'

'

'

'

'

'

139,374

120,379

5,292

4,689

4,149

12,582

13,869

12,476

17,874

18,558

5,292

4,689

12,582

13,869

Defined benefit plan investment purchases

'

'

'

'

'

'

760

1,005

11,722

11,070

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Purchases

'

'

'

'

'

'

0

0

-12,751

-10,212

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Settlements, Plan Assets

'

'

'

'

'

'

-732

-850

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Administration Expenses

'

'

($83)

($59)

($346)

($362)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Retirement_Plans_Schedule_Of_W

Retirement Plans (Schedule Of Weighted Average Assumptions Based On The Pension Plan) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Discount rate, benefit obligation	5.00%	4.00%	4.00%
Rate of compensation increase, benefit obligation	'	350.00%	350.00%
Discount rate, net periodic benefit cost	375.00%	425.00%	520.00%
Expected long-term return on plan assets, net periodic benefit cost	800.00%	800.00%	800.00%
Rate of compensation increase, net periodic benefit cost	350.00%	350.00%	350.00%

Retirement_Plans_Summary_Of_Th

Retirement Plans (Summary Of The Fair Values Of Pension Plan Investments According To The Fair Value Hierarchy And The Weighted Average Allocations) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Thousands, unless otherwise specified
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	$171,905	$157,082	'
Investment Owned, Percent of Net Assets	10000.00%	10000.00%	'
Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	14,657	18,145	'
Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	139,374	120,379	'
Fair Value, Inputs, Level 3 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	17,874	18,558	'
Guaranteed Deposit Account [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	12,582	13,869	'
Investment Owned, Percent of Net Assets	700.00%	900.00%	'
Guaranteed Deposit Account [Member] | Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	12,582	13,869	12,476
Guaranteed Deposit Account [Member] | Fair Value, Inputs, Level 3 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	12,582	13,869	'
Limited Partnerships [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	5,292	4,689	'
Investment Owned, Percent of Net Assets	300.00%	300.00%	'
Limited Partnerships [Member] | Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	5,292	4,689	4,149
Limited Partnerships [Member] | Fair Value, Inputs, Level 3 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	5,292	4,689	'
Common Stock [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	8,098	6,890	'
Investment Owned, Percent of Net Assets	500.00%	400.00%	'
Common Stock [Member] | Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	8,098	6,890	'
Common Stock [Member] | Insurance Company Pooled Separate Accounts [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	102,603	85,938	'
Investment Owned, Percent of Net Assets	6000.00%	5500.00%	'
Common Stock [Member] | Insurance Company Pooled Separate Accounts [Member] | Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	102,603	85,938	'
Equity Investments [Member] | Mutual Funds [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	0	4,407	'
Investment Owned, Percent of Net Assets	0.00%	300.00%	'
Equity Investments [Member] | Mutual Funds [Member] | Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	0	4,407	'
Debt Investments [Member] | Mutual Funds [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	6,559	6,848	'
Investment Owned, Percent of Net Assets	400.00%	400.00%	'
Debt Investments [Member] | Mutual Funds [Member] | Level 1 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	6,559	6,848	'
Debt Investments [Member] | Insurance Company Pooled Separate Accounts [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	29,091	27,566	'
Investment Owned, Percent of Net Assets	1700.00%	1800.00%	'
Debt Investments [Member] | Insurance Company Pooled Separate Accounts [Member] | Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	29,091	27,566	'
Real Estate [Member] | Insurance Company Pooled Separate Accounts [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	7,680	6,875	'
Investment Owned, Percent of Net Assets	400.00%	400.00%	'
Real Estate [Member] | Insurance Company Pooled Separate Accounts [Member] | Level 2 [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Fair values of pension plan investments	$7,680	$6,875	'

Retirement_Plans_Fair_values_o

Retirement Plans Fair values of pension plan assets - Level 3 rolforward (Details) (USD $)

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

In Thousands, unless otherwise specified

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Limited Liability Company [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Limited Partner [Member]

Limited Partner [Member]

Guaranteed Deposit Account [Member]

Guaranteed Deposit Account [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Realized Investment Gains (Losses) [Member]

Realized Investment Gains (Losses) [Member]

Marketable Securities Unrealized Gain (Loss) [Member]

Marketable Securities Unrealized Gain (Loss) [Member]

Investment Income, Interest and Dividends [Member]

Investment Income, Interest and Dividends [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Fair Value, Inputs, Level 2 [Member]

Realized Investment Gains (Losses) [Member]

Realized Investment Gains (Losses) [Member]

Marketable Securities Unrealized Gain (Loss) [Member]

Marketable Securities Unrealized Gain (Loss) [Member]

Investment Income, Interest and Dividends [Member]

Investment Income, Interest and Dividends [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined benefit plan investment sales

'

'

'

'

$0

$0

'

'

'

'

'

'

'

'

'

($12,751)

($10,212)

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Settlements, Plan Assets

'

'

'

'

-732

-850

'

'

'

'

'

'

'

'

'

0

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Fair Value of Plan Assets

171,905

157,082

139,374

120,379

5,292

4,689

5,292

4,689

4,149

'

'

'

'

'

'

12,582

13,869

12,582

13,869

12,476

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Administration Expenses

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

-83

-59

-346

-362

Defined Benefit Plan, Fair Value of Plan Assets, Period Increase (Decrease)

'

'

'

'

'

'

'

'

'

-74

-98

732

542

0

0

'

'

'

'

'

0

0

-398

372

486

525

'

'

'

'

Defined benefit plan investment purchases

'

'

'

'

$760

$1,005

'

'

'

'

'

'

'

'

'

$11,722

$11,070

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair_Value_Narrative_Details

Fair Value (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivatives, Fair Value [Line Items]	'	'	'
Other noninterest-bearing investments valued under the cost method	$53,600,000	$74,800,000	'
Net gains on sale of OREO properties	3,681,000	-17,166,000	-58,676,000
Principal amount of other real estate owned property sold	82,500,000	163,000,000	'
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	248,400,000	255,600,000	'
Private equity investments prohibited by Volker rule	58,000,000	'	'
OREO Properties [Member]	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'
Net gains on sale of OREO properties	15,600,000	15,300,000	'
Impairment of OREO properties	800,000	2,700,000	'
Level 2 [Member]	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'
Fair value of AFS securities	2,137,259,000	1,765,214,000	'
Fair Value, Inputs, Level 3 [Member]	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'
Fair value of AFS securities	1,304,877,000	1,003,900,000	'
Third Party Pricing Service [Member] | Level 2 [Member]	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'
Fair value of AFS securities	0	'	'
Third Party Pricing Service [Member] | Fair Value, Inputs, Level 3 [Member]	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'
Fair value of AFS securities	$0	'	'

Fair_Value_Schedule_Of_Assets_

Fair Value (Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Trading account, at fair value	$34,559	$28,290
Securities sold, not yet purchased	73,606	26,735
Level 1 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	259,750	322,196
Total assets	269,364	326,600
Securities sold, not yet purchased	73,606	26,735
Total liabilities	82,249	29,894
Level 1 [Member] | Mutual Funds And Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	259,750	219,214
Level 1 [Member] | Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	'	102,982
Level 1 [Member] | Derivatives [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	9,614	4,404
Other liabilities	8,643	3,159
Level 1 [Member] | Derivatives [Member] | Foreign Currency Exchange Contracts [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	9,614	4,404
Other liabilities	8,643	3,159
Level 2 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	2,137,259	1,765,214
Trading account, at fair value	34,559	28,290
Total assets	2,699,615	2,336,784
Securities sold, not yet purchased	'	'
Total liabilities	55,692	84,068
Level 2 [Member] | Mutual Funds And Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	20,453	8,797
Level 2 [Member] | Bank-owned life insurance [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other noninterest-bearing investments	466,428	455,719
Level 2 [Member] | Private Equity [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other noninterest-bearing investments	4,822	5,132
Level 2 [Member] | Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	2,059,105	1,692,637
Level 2 [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	55,602	59,445
Level 2 [Member] | Asset-Backed Securities [Member] | Trust Preferred - Banks And Insurance [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	'	121
Level 2 [Member] | Asset-Backed Securities [Member] | Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	'	'
Level 2 [Member] | Asset-Backed Securities [Member] | Other (Including ABS CDOs) [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	'	4,214
Level 2 [Member] | Asset-Backed Securities [Member] | Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	2,099	'
Level 2 [Member] | Derivatives [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	56,547	82,429
Other liabilities	55,692	84,068
Level 2 [Member] | Derivatives [Member] | Interest Rate Related And Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	1,100	2,850
Other liabilities	1,004	1,142
Level 2 [Member] | Derivatives [Member] | Interest Rate Swaps For Customers [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	55,447	79,579
Other liabilities	54,688	82,926
Fair Value, Inputs, Level 3 [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	1,304,877	1,003,900
Total assets	1,387,287	1,068,123
Other liabilities	241	124
Total liabilities	4,303	5,251
Fair Value, Inputs, Level 3 [Member] | Private Equity [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other noninterest-bearing investments	82,410	64,223
Fair Value, Inputs, Level 3 [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	10,662	16,551
Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member] | Trust Preferred - Banks And Insurance [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	1,238,820	949,271
Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member] | Trust Preferred - Real Estate Investment Trusts [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	22,996	16,403
Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member] | Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	6,599	6,515
Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member] | Other (Including ABS CDOs) [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	'	15,160
Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member] | Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	25,800	15,160
Fair Value, Inputs, Level 3 [Member] | Derivatives [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other liabilities	4,062	5,127
Fair Value, Inputs, Level 3 [Member] | Derivatives [Member] | Total Return Swap [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other liabilities	4,062	5,127
Estimated Fair Value [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	3,701,886	3,091,310
Trading account, at fair value	34,559	28,290
Total assets	4,356,266	3,731,507
Securities sold, not yet purchased	73,606	26,735
Other liabilities	241	124
Total liabilities	142,244	119,213
Estimated Fair Value [Member] | Mutual Funds And Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	280,203	228,011
Estimated Fair Value [Member] | Bank-owned life insurance [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other noninterest-bearing investments	466,428	455,719
Estimated Fair Value [Member] | Private Equity [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other noninterest-bearing investments	87,232	69,355
Estimated Fair Value [Member] | Available-for-sale Securities [Member] | U.S. Treasury, Agencies And Corporations [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	2,059,105	1,795,619
Estimated Fair Value [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	66,264	75,996
Estimated Fair Value [Member] | Asset-Backed Securities [Member] | Trust Preferred - Banks And Insurance [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	1,238,820	949,392
Estimated Fair Value [Member] | Asset-Backed Securities [Member] | Trust Preferred - Real Estate Investment Trusts [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	22,996	16,403
Estimated Fair Value [Member] | Asset-Backed Securities [Member] | Auction Rate Securities [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	6,599	6,515
Estimated Fair Value [Member] | Asset-Backed Securities [Member] | Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Investment securities	27,899	19,374
Estimated Fair Value [Member] | Derivatives [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	66,161	86,833
Other liabilities	68,397	92,354
Estimated Fair Value [Member] | Derivatives [Member] | Interest Rate Related And Other [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	1,100	2,850
Other liabilities	1,004	1,142
Estimated Fair Value [Member] | Derivatives [Member] | Interest Rate Swaps For Customers [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	55,447	79,579
Other liabilities	54,688	82,926
Estimated Fair Value [Member] | Derivatives [Member] | Foreign Currency Exchange Contracts [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other assets	9,614	4,404
Other liabilities	8,643	3,159
Estimated Fair Value [Member] | Derivatives [Member] | Total Return Swap [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Other liabilities	$4,062	$5,127

Fair_Value_Schedule_Of_Key_Mod

Fair Value (Schedule Of Key Model Inputs And Assumptions Used To Fair Value Certain Asset-Backed Securities) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Prepayment rate	5.00%	4.50%
Trust Preferred Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Prepayment rate	0.00%	0.00%
Asset-Backed Securities [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Loss severity	100.00%	100.00%
Minimum [Member] | Asset-Backed Securities [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Loss severity	60.00%	60.00%
Maximum [Member] | Asset-Backed Securities [Member] | Trust Preferred Securities - Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Loss severity	100.00%	100.00%
Constant Default Rate Year 1 [Member] | Minimum [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	0.38%	0.30%
Constant Default Rate Year 1 [Member] | Minimum [Member] | Trust Preferred Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	4.10%	5.10%
Constant Default Rate Year 1 [Member] | Maximum [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	1.03%	0.32%
Constant Default Rate Year 1 [Member] | Maximum [Member] | Trust Preferred Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	10.60%	8.60%
Constant Default Rate Year 2 to 3 [Member] | Minimum [Member] | Trust Preferred Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	4.60%	4.20%
Constant Default Rate Year 2 to 3 [Member] | Maximum [Member] | Trust Preferred Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	5.50%	7.10%
Constant Default Rate Year 2 to 5 [Member] | Minimum [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	0.53%	0.47%
Constant Default Rate Year 2 to 5 [Member] | Maximum [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	0.89%	0.50%
Constant Default Rate Year 4 to 6 [Member] | Trust Preferred Real Estate Investment Trusts [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	1.00%	1.00%
Constant Default Rate Year 6 to Maturity [Member] | Minimum [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	0.50%	0.50%
Constant Default Rate Year 6 to Maturity [Member] | Maximum [Member] | Trust Preferred - Predominantly Insurance [Member]	'	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'	'
Asset-backed securities, Constant default rate	0.55%	0.54%

Fair_Value_Schedule_Of_Assets_1

Fair Value (Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs) (Details) (USD $)

12 Months Ended

In Thousands, unless otherwise specified

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Derivative Instruments, Gain (Loss) [Table Text Block]

'

'

'

Year Ended December 31, 2013

Year Ended December 31, 2012

Amount of derivative gain (loss) recognized/reclassified

(In thousands)

OCI

Reclassified

Noninterest

Offset to

OCI

Reclassified

Noninterest

Offset to

from AOCI

income

interest

from AOCI

income

interest

to interest

(expense)

expense

to interest

(expense)

expense

income

income

Derivatives designated as hedging instruments

Asset derivatives

Cash flow hedges 1:

Interest rate swaps

$

(225

)

$

2,647

$

390

$

13,062

(225

)

2,647

3

390

13,062

3

Liability derivatives

Fair value hedges:

Terminated swaps on long-term debt

$

3,120

$

3,054

Total derivatives designated as hedging instruments

(225

)

2,647

3,120

390

13,062

3,054

Derivatives not designated as hedging instruments

Interest rate swaps

$

(493

)

$

(1,467

)

Interest rate swaps for customers 2

10,918

7,858

Basis swaps

—

18

Futures contracts

2

(13

)

Foreign exchange

9,190

8,628

Total return swap

(21,753

)

(21,707

)

Total derivatives not designated as hedging instruments

(2,136

)

(6,683

)

Total derivatives

$

(225

)

$

2,647

$

(2,136

)

$

3,120

$

390

$

13,062

$

(6,683

)

$

3,054

Note: These schedules are not intended to present at any given time the Company’s long/short position with respect to its derivative contracts.

1 Amounts recognized in OCI and reclassified from AOCI represent the effective portion of the derivative gain (loss).

2 Amounts include both the customer swaps and the offsetting derivative contracts.

3 Amounts of $2.6 million for 2013 and $13.1 million for 2012 are the amounts of reclassification to earnings presented in the tabular changes of AOCI in Note 14.

Total net gains (losses) included in, Other noninterest expense

$300,412

$275,151

$285,974

Fair value of assets, Ending balance

'

'

'

Fair value of liabilities, Ending balance

'

'

'

Municipal Securities [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of assets, Beginning balance

16,551

17,381

'

Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale

41

102

'

Total net gains (losses) included in, Fixed income securities gains (losses), net

239

9

'

Total net gains (losses) included in, Other comprehensive income (loss)

1,540

-291

'

Total net gains (losses) included in, Sales

'

'

'

Total net gains (losses) included in, Redemptions and paydowns

-7,709

-650

'

Fair value of assets, Ending balance

10,662

16,551

'

Trust Preferred - Banks And Insurance [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of assets, Beginning balance

949,271

929,356

'

Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale

3,166

7,126

'

Total net gains (losses) included in, Fixed income securities gains (losses), net

-3,160

20,906

'

Total net gains (losses) included in, Net impairment losses on investment securities

-136,221

-96,707

'

Total net gains (losses) included in, Other comprehensive income (loss)

377,357

218,001

'

Total net gains (losses) included in, Purchases

'

'

'

Total net gains (losses) included in, Sales

66,303

'

'

Total net gains (losses) included in, Redemptions and paydowns

-60,989

-129,411

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Reclassification

175,699

'

'

Fair value of assets, Ending balance

1,238,820

949,271

'

Trust Preferred Securities - Real Estate Investment Trusts [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of assets, Beginning balance

16,403

18,645

'

Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale

254

224

'

Total net gains (losses) included in, Fixed income securities gains (losses), net

-201

'

'

Total net gains (losses) included in, Net impairment losses on investment securities

-17,430

'

'

Total net gains (losses) included in, Other comprehensive income (loss)

24,081

-2,466

'

Total net gains (losses) included in, Sales

111

'

'

Fair value of assets, Ending balance

22,996

16,403

'

Auction Rate Securities [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of assets, Beginning balance

6,515

70,020

'

Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale

3

4

'

Total net gains (losses) included in, Fixed income securities gains (losses), net

'

4,161

'

Total net gains (losses) included in, Other comprehensive income (loss)

81

1,330

'

Total net gains (losses) included in, Sales

'

'

'

Total net gains (losses) included in, Redemptions and paydowns

'

-69,000

'

Fair value of assets, Ending balance

6,599

6,515

'

Other Asset-Backed [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of assets, Beginning balance

15,160

43,546

'

Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale

82

232

'

Total net gains (losses) included in, Fixed income securities gains (losses), net

55

-5,762

'

Total net gains (losses) included in, Net impairment losses on investment securities

-11,080

'

'

Total net gains (losses) included in, Other comprehensive income (loss)

6,950

8,343

'

Total net gains (losses) included in, Sales

1

'

'

Total net gains (losses) included in, Redemptions and paydowns

-5,780

-31,199

'

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Reclassification

20,414

'

'

Fair value of assets, Ending balance

25,800

15,160

'

Private Equity Investments [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of assets, Beginning balance

64,223

62,327

'

Total net gains (losses) included in, Dividends and other investment income

6,662

10,399

'

Total net gains (losses) included in, Equity securities gains, net

3,732

11,478

'

Total net gains (losses) included in, Purchases

10,548

9,043

'

Total net gains (losses) included in, Sales

-2,244

-15,872

'

Total net gains (losses) included in, Redemptions and paydowns

-511

-13,152

'

Fair value of assets, Ending balance

82,410

64,223

'

Derivatives [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Derivative Instruments, Gain (Loss) [Table Text Block]

'-21753

'-21707

'

Derivatives [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of liabilities, Beginning balance

-5,127

-5,422

'

Total net gains (losses) included, in Redemptions and paydowns, Liabilities

-22,818

22,002

'

Fair value of liabilities, Ending balance

-4,062

-5,127

'

Other Liabilities [Member]

'

'

'

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

'

'

'

Fair value of liabilities, Beginning balance

-124

-86

'

Total net gains (losses) included in, Other noninterest expense

-117

-38

'

Fair value of liabilities, Ending balance

($241)

($124)

'

Fair_Value_Schedule_Of_Realize

Fair Value (Schedule Of Realized Gains (Losses) Using Level 3 Inputs) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Dividends And Other Investment Income [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Realized gains (losses) from Level 3 inputs	($133)	$1,635
Level 3 Equity securities gains (losses), net [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Realized gains (losses) from Level 3 inputs	-2,452	10,359
Fixed Income Securities Gains (Losses), Net [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Realized gains (losses) from Level 3 inputs	($3,067)	$19,314

Fair_Value_Fair_Value_Summary_

Fair Value Fair Value (Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Inputs, Level 3 [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Investment securities	1,304,877	1,003,900
Trust Preferred - Predominantly Insurance [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Investment securities	346,390	256,104
Trust Preferred - Individual Banks [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Investment securities	22,324	20,910
Trust Preferred - Real Estate Investment Trusts [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Investment securities	22,996	16,403
Other (Including ABS CDOs) [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Investment securities	25,800	15,160
Trust Preferred Predominantly Banks [Member] | Fair Value, Inputs, Level 3 [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Investment securities	921,819	798,458
Trust Preferred - Individual Banks [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Significant Unobservable Inputs, Yield Rate	7.80%	9.70%
Significant Unobservable Inputs, Price Rate	109.60%	108.00%
Trust Preferred - Individual Banks [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Significant Unobservable Inputs, Yield Rate	6.60%	9.40%
Significant Unobservable Inputs, Price Rate	81.25%	73.10%
Trust Preferred Securities - Real Estate Investment Trusts [Member] | Maximum [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses	100.00%	100.00%
Trust Preferred Securities - Real Estate Investment Trusts [Member] | Minimum [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses	60.00%	60.00%
Other Predominantly ABS CODs [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	100.00%	100.00%
Discount rate range of LIBOR utilized for fair value purposes	22.00%	22.00%
Other Predominantly ABS CODs [Member] | Maximum [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses	92.00%	92.00%
Other Predominantly ABS CODs [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.01%	0.01%
Discount rate range of LIBOR utilized for fair value purposes	9.00%	9.00%
Other Predominantly ABS CODs [Member] | Minimum [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses	70.00%	70.00%
Trust Preferred - Real Estate Investment Trusts [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	0.00%	0.00%
Trust Preferred - Real Estate Investment Trusts [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Discount rate range of LIBOR utilized for fair value purposes	15.00%	23.00%
Trust Preferred - Real Estate Investment Trusts [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Discount rate range of LIBOR utilized for fair value purposes	5.50%	6.50%
Trust Preferred - Real Estate Investment Trusts [Member] | Constant Default Rate Year 2 to 3 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	5.50%	7.10%
Trust Preferred - Real Estate Investment Trusts [Member] | Constant Default Rate Year 2 to 3 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	4.60%	4.20%
Trust Preferred - Real Estate Investment Trusts [Member] | Constant Default Rate Year 4 to 6 [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	1.00%	1.00%
Trust Preferred - Real Estate Investment Trusts [Member] | Constant Default Rate Years 7 to Maturity [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.50%	0.50%
Trust Preferred - Real Estate Investment Trusts [Member] | Constant Default Rate Year 1 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	10.60%	8.60%
Trust Preferred - Real Estate Investment Trusts [Member] | Constant Default Rate Year 1 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	4.10%	5.10%
Trust Preferred - Predominantly Insurance [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	5.00%	4.50%
Significant Unobservable Inputs, Loss Given Deferral Rate	'	2.20%
Trust Preferred - Predominantly Insurance [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses	100.00%	100.00%
Trust Preferred - Predominantly Insurance [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Significant Unobservable Inputs, Loss Given Deferral Rate	30.13%	'
Discount rate range of LIBOR utilized for fair value purposes	6.49%	16.21%
Trust Preferred - Predominantly Insurance [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Significant Unobservable Inputs, Loss Given Deferral Rate	2.18%	'
Discount rate range of LIBOR utilized for fair value purposes	3.72%	3.75%
Trust Preferred - Predominantly Insurance [Member] | Constant Default Rate Year 2 to 5 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.89%	0.50%
Trust Preferred - Predominantly Insurance [Member] | Constant Default Rate Year 2 to 5 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.53%	0.47%
Trust Preferred - Predominantly Insurance [Member] | Constant Default Rate Year 6 to Maturity [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.55%	0.54%
Trust Preferred - Predominantly Insurance [Member] | Constant Default Rate Year 6 to Maturity [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.50%	0.50%
Trust Preferred - Predominantly Insurance [Member] | Constant Default Rate Year 1 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	1.03%	0.32%
Trust Preferred - Predominantly Insurance [Member] | Constant Default Rate Year 1 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.38%	0.30%
Trust Preferred Predominantly Banks [Member] | Asset-Backed Securities [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Static Pool Losses	100.00%	100.00%
Trust Preferred Predominantly Banks [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Significant Unobservable Inputs, Loss Given Deferral Rate	100.00%	100.00%
Discount rate range of LIBOR utilized for fair value purposes	7.70%	13.40%
Trust Preferred Predominantly Banks [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Significant Unobservable Inputs, Loss Given Deferral Rate	14.39%	9.69%
Discount rate range of LIBOR utilized for fair value purposes	5.60%	7.70%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Until 2016 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	20.73%	21.24%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Until 2016 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	5.50%	10.00%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Year 2 to 5 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	1.14%	0.67%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Year 2 to 5 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.49%	0.47%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Year 6 to Maturity [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.65%	0.68%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Year 6 to Maturity [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.58%	0.58%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate 2016 to Maturity [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption for Fair Value of Assets or Liabilities that relate to Transferor's Continuing Involvement, Prepayment Speed	3.00%	3.00%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Year 1 [Member] | Maximum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	1.94%	1.97%
Trust Preferred Predominantly Banks [Member] | Constant Default Rate Year 1 [Member] | Minimum [Member]	'	'
Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Line Items]	'	'
Assumption For Fair Value Of Assets Or Liabilities Constant Default Rate	0.30%	0.30%

Fair_Value_Schedule_Of_Assets_2

Fair Value (Schedule Of Assets With Fair Value Changes On Nonrecurring Basis) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Principal amount of other real estate owned property sold	$82,500,000	$163,000,000
HTM Securities Adjusted For OTTI [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	8,483,000	23,524,000
Gains (losses) from fair value changes	-403,000	-7,423,000
Impaired Loans [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Gains (losses) from fair value changes	-1,575,000	-4,300,000
Private equity investments, carried at cost [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	13,270,000	13,520,000
Gains (losses) from fair value changes	-5,700,000	-2,176,000
Other Real Estate Owned [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	24,684,000	58,954,000
Gains (losses) from fair value changes	-13,158,000	-20,641,000
Nonrecurring Fair Value Measurements Asset Totals [Domain]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	58,202,000	140,446,000
Total gains (losses) from fair value changes measured on nonrecurring basis [Domain]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Gains (losses) from fair value changes	-20,836,000	-34,540,000
Level 1 [Member] | HTM Securities Adjusted For OTTI [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 1 [Member] | Impaired Loans [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 1 [Member] | Private equity investments, carried at cost [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 1 [Member] | Other Real Estate Owned [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 1 [Member] | Nonrecurring Fair Value Measurements Asset Totals [Domain]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 2 [Member] | HTM Securities Adjusted For OTTI [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 2 [Member] | Impaired Loans [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	11,765,000	44,448,000
Level 2 [Member] | Private equity investments, carried at cost [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Level 2 [Member] | Other Real Estate Owned [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	24,684,000	58,954,000
Level 2 [Member] | Nonrecurring Fair Value Measurements Asset Totals [Domain]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	36,449,000	103,402,000
Fair Value, Inputs, Level 3 [Member] | HTM Securities Adjusted For OTTI [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	8,483,000	23,524,000
Fair Value, Inputs, Level 3 [Member] | Impaired Loans [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Fair Value, Inputs, Level 3 [Member] | Private equity investments, carried at cost [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	13,270,000	13,520,000
Fair Value, Inputs, Level 3 [Member] | Other Real Estate Owned [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	0	0
Fair Value, Inputs, Level 3 [Member] | Nonrecurring Fair Value Measurements Asset Totals [Domain]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	21,753,000	37,044,000
Estimated Fair Value [Member] | Impaired Loans [Member]	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'
Fair value of assets measured on nonrecurring basis	$11,765,000	$44,448,000

Fair_Value_Schedule_Of_Carryin

Fair Value (Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Held-to-maturity, fair value	$609,547	$674,741
Loans and Leases Receivable, Net Amount	38,297,074	36,769,160
Time deposits	2,593,038	2,962,931
Other short-term borrowings	0	5,409
Long-term debt (less fair value hedges)	2,273,575	2,337,113
Fair Value, Inputs, Level 2 [Member] | Carrying Value [Member]	'	'
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Time deposits	2,593,038	2,962,931
Foreign deposits	1,980,161	1,804,060
Other short-term borrowings	0	5,409
Long-term debt (less fair value hedges)	2,269,762	2,329,323
Fair Value, Inputs, Level 2 [Member] | Estimated Fair Value [Member]	'	'
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Time deposits	2,602,955	2,988,714
Foreign deposits	1,979,805	1,803,625
Other short-term borrowings	0	5,421
Long-term debt (less fair value hedges)	2,423,643	2,636,422
Fair Value, Inputs, Level 3 [Member] | Carrying Value [Member]	'	'
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Held-to-maturity, fair value	588,981	756,909
Loans and Leases Receivable, Net Amount	38,468,402	37,020,811
Fair Value, Inputs, Level 3 [Member] | Estimated Fair Value [Member]	'	'
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Held-to-maturity, fair value	609,547	674,741
Loans and Leases Receivable, Net Amount	$38,088,242	$37,024,198

Fair_Value_Transfers_of_invest

Fair Value Transfers of investments amoung fair value levels (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Fair Value Level Transfers Among Levels 1, 2, and 3	$0	$0

Operating_Segment_Information_1

Operating Segment Information (Details) (USD $)

3 Months Ended

12 Months Ended

Dec. 31, 2013

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Banks

Banks

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

$0

'

'

'

($3,428,000)

'

'

'

$0

($3,428,000)

'

'

Net interest income

432,035,000

415,521,000

430,657,000

418,115,000

429,957,000

438,161,000

426,344,000

437,478,000

1,696,328,000

1,731,940,000

1,756,185,000

'

Provision for loan losses

-30,538,000

-5,573,000

-21,990,000

-29,035,000

-10,401,000

-1,889,000

10,853,000

15,664,000

-87,136,000

14,227,000

74,532,000

'

Loans and Leases Receivable, Net of Deferred Income

39,043,365,000

'

'

'

37,665,247,000

'

'

'

39,043,365,000

37,665,247,000

'

'

Deposits

46,361,880,000

'

'

'

46,133,073,000

'

'

'

46,361,880,000

46,133,073,000

'

'

Carrying value, Preferred stock

1,003,970,000

'

'

'

1,128,302,000

'

'

'

1,003,970,000

1,128,302,000

'

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

1,783,464,000

1,717,713,000

1,681,653,000

'

Net impairment losses on investment securities

-141,733,000

-9,067,000

-4,217,000

-10,117,000

83,808,000

2,736,000

7,308,000

10,209,000

-165,134,000

-104,061,000

-33,683,000

'

Other noninterest income

'

'

'

'

'

'

'

'

17,940,000

13,129,000

29,607,000

'

Noninterest expense

494,750,000

370,663,000

451,678,000

397,348,000

407,014,000

394,975,000

401,656,000

392,372,000

1,714,439,000

1,596,017,000

1,658,564,000

'

Income (loss) before income taxes

-63,327,000

172,621,000

126,117,000

171,021,000

87,503,000

170,301,000

142,500,000

141,262,000

406,432,000

541,566,000

521,273,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

142,977,000

193,416,000

198,583,000

'

Net income (loss)

-41,472,000

111,514,000

83,026,000

110,387,000

57,686,000

109,597,000

91,464,000

89,403,000

263,455,000

348,150,000

322,690,000

'

Cash and due from banks

1,175,083,000

'

'

'

1,841,907,000

'

'

'

1,175,083,000

1,841,907,000

1,224,350,000

924,126,000

Assets

56,031,127,000

'

'

'

55,511,918,000

'

'

'

56,031,127,000

55,511,918,000

'

'

Number of community/regional banks operating in distinct geographical areas

8

'

'

'

'

'

'

'

8

'

'

'

Total shareholders' equity

6,464,563,000

'

'

'

6,048,641,000

'

'

'

6,464,563,000

6,048,641,000

6,983,228,000

6,647,214,000

Zions Bank [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

595,000,000

657,100,000

683,300,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-40,500,000

88,300,000

128,300,000

'

Money Market Funds, at Carrying Value

3,888,000,000

'

'

'

2,855,000,000

'

'

'

3,888,000,000

2,855,000,000

2,198,000,000

'

Investment and Trading Securities

1,520,000,000

'

'

'

1,273,000,000

'

'

'

1,520,000,000

1,273,000,000

1,460,000,000

'

Loans and Leases Receivable, Net of Deferred Income

12,259,000,000

'

'

'

12,490,000,000

'

'

'

12,259,000,000

12,490,000,000

12,751,000,000

'

Deposits

16,257,000,000

'

'

'

15,575,000,000

'

'

'

16,257,000,000

15,575,000,000

14,905,000,000

'

Carrying value, Preferred stock

280,000,000

'

'

'

280,000,000

'

'

'

280,000,000

280,000,000

480,000,000

'

Average Common Equity

1,523,000,000

'

'

'

1,519,000,000

'

'

'

1,523,000,000

1,519,000,000

1,379,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

635,500,000

568,800,000

555,000,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

7,700,000

3,200,000

300,000

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

0

0

'

Other noninterest income

'

'

'

'

'

'

'

'

199,900,000

221,400,000

219,200,000

'

Noninterest expense

'

'

'

'

'

'

'

'

481,400,000

493,100,000

547,400,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

346,300,000

293,900,000

226,500,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

121,700,000

104,600,000

76,000,000

'

Net income (loss)

'

'

'

'

'

'

'

'

224,600,000

189,300,000

150,500,000

'

Cash and due from banks

363,000,000

'

'

'

650,000,000

'

'

'

363,000,000

650,000,000

416,000,000

'

Assets

18,590,000,000

'

'

'

17,930,000,000

'

'

'

18,590,000,000

17,930,000,000

17,531,000,000

'

Total shareholders' equity

1,803,000,000

'

'

'

1,799,000,000

'

'

'

1,803,000,000

1,799,000,000

1,859,000,000

'

CB&T [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

469,000,000

466,700,000

506,900,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-16,700,000

-7,900,000

-9,500,000

'

Money Market Funds, at Carrying Value

1,108,000,000

'

'

'

1,449,000,000

'

'

'

1,108,000,000

1,449,000,000

1,090,000,000

'

Investment and Trading Securities

331,000,000

'

'

'

350,000,000

'

'

'

331,000,000

350,000,000

335,000,000

'

Loans and Leases Receivable, Net of Deferred Income

8,574,000,000

'

'

'

8,259,000,000

'

'

'

8,574,000,000

8,259,000,000

8,392,000,000

'

Deposits

9,327,000,000

'

'

'

9,483,000,000

'

'

'

9,327,000,000

9,483,000,000

9,192,000,000

'

Carrying value, Preferred stock

162,000,000

'

'

'

162,000,000

'

'

'

162,000,000

162,000,000

262,000,000

'

Average Common Equity

1,342,000,000

'

'

'

1,322,000,000

'

'

'

1,342,000,000

1,322,000,000

1,270,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

485,700,000

474,600,000

516,400,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

0

0

500,000

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

-9,200,000

-43,900,000

'

Other noninterest income

'

'

'

'

'

'

'

'

79,300,000

75,300,000

105,400,000

'

Noninterest expense

'

'

'

'

'

'

'

'

352,400,000

330,200,000

355,000,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

212,600,000

210,500,000

222,400,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

72,500,000

83,400,000

88,000,000

'

Net income (loss)

'

'

'

'

'

'

'

'

140,100,000

127,100,000

134,400,000

'

Cash and due from banks

157,000,000

'

'

'

205,000,000

'

'

'

157,000,000

205,000,000

175,000,000

'

Assets

10,923,000,000

'

'

'

11,069,000,000

'

'

'

10,923,000,000

11,069,000,000

10,894,000,000

'

Total shareholders' equity

1,504,000,000

'

'

'

1,484,000,000

'

'

'

1,504,000,000

1,484,000,000

1,532,000,000

'

Amegy [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

381,500,000

371,500,000

391,200,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

4,200,000

-63,900,000

-37,400,000

'

Money Market Funds, at Carrying Value

2,551,000,000

'

'

'

2,308,000,000

'

'

'

2,551,000,000

2,308,000,000

2,222,000,000

'

Investment and Trading Securities

362,000,000

'

'

'

439,000,000

'

'

'

362,000,000

439,000,000

475,000,000

'

Loans and Leases Receivable, Net of Deferred Income

9,217,000,000

'

'

'

8,450,000,000

'

'

'

9,217,000,000

8,450,000,000

8,031,000,000

'

Deposits

11,198,000,000

'

'

'

10,706,000,000

'

'

'

11,198,000,000

10,706,000,000

9,731,000,000

'

Carrying value, Preferred stock

226,000,000

'

'

'

251,000,000

'

'

'

226,000,000

251,000,000

488,000,000

'

Average Common Equity

1,845,000,000

'

'

'

1,725,000,000

'

'

'

1,845,000,000

1,725,000,000

1,630,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

377,300,000

435,400,000

428,600,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

0

0

0

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

0

0

'

Other noninterest income

'

'

'

'

'

'

'

'

146,400,000

156,100,000

138,400,000

'

Noninterest expense

'

'

'

'

'

'

'

'

333,400,000

340,200,000

324,900,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

190,300,000

251,300,000

242,100,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

59,800,000

84,600,000

80,500,000

'

Net income (loss)

'

'

'

'

'

'

'

'

130,500,000

166,700,000

161,600,000

'

Cash and due from banks

437,000,000

'

'

'

754,000,000

'

'

'

437,000,000

754,000,000

406,000,000

'

Assets

13,705,000,000

'

'

'

13,119,000,000

'

'

'

13,705,000,000

13,119,000,000

12,282,000,000

'

Total shareholders' equity

2,071,000,000

'

'

'

1,976,000,000

'

'

'

2,071,000,000

1,976,000,000

2,118,000,000

'

NBA [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

163,000,000

167,700,000

172,100,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-15,000,000

-600,000

9,600,000

'

Money Market Funds, at Carrying Value

220,000,000

'

'

'

385,000,000

'

'

'

220,000,000

385,000,000

604,000,000

'

Investment and Trading Securities

362,000,000

'

'

'

263,000,000

'

'

'

362,000,000

263,000,000

271,000,000

'

Loans and Leases Receivable, Net of Deferred Income

3,724,000,000

'

'

'

3,604,000,000

'

'

'

3,724,000,000

3,604,000,000

3,304,000,000

'

Deposits

3,931,000,000

'

'

'

3,874,000,000

'

'

'

3,931,000,000

3,874,000,000

3,731,000,000

'

Carrying value, Preferred stock

120,000,000

'

'

'

180,000,000

'

'

'

120,000,000

180,000,000

305,000,000

'

Average Common Equity

418,000,000

'

'

'

399,000,000

'

'

'

418,000,000

399,000,000

350,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

178,000,000

168,300,000

162,500,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

0

0

0

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

0

0

'

Other noninterest income

'

'

'

'

'

'

'

'

35,000,000

32,100,000

34,400,000

'

Noninterest expense

'

'

'

'

'

'

'

'

142,700,000

152,500,000

154,700,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

70,300,000

47,900,000

42,200,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

26,400,000

17,000,000

16,700,000

'

Net income (loss)

'

'

'

'

'

'

'

'

43,900,000

30,900,000

25,500,000

'

Cash and due from banks

77,000,000

'

'

'

86,000,000

'

'

'

77,000,000

86,000,000

71,000,000

'

Assets

4,579,000,000

'

'

'

4,575,000,000

'

'

'

4,579,000,000

4,575,000,000

4,485,000,000

'

Total shareholders' equity

538,000,000

'

'

'

579,000,000

'

'

'

538,000,000

579,000,000

655,000,000

'

NSB [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

113,600,000

123,400,000

135,000,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-12,000,000

-9,600,000

-38,300,000

'

Money Market Funds, at Carrying Value

710,000,000

'

'

'

1,031,000,000

'

'

'

710,000,000

1,031,000,000

905,000,000

'

Investment and Trading Securities

774,000,000

'

'

'

742,000,000

'

'

'

774,000,000

742,000,000

748,000,000

'

Loans and Leases Receivable, Net of Deferred Income

2,297,000,000

'

'

'

2,100,000,000

'

'

'

2,297,000,000

2,100,000,000

2,235,000,000

'

Deposits

3,590,000,000

'

'

'

3,604,000,000

'

'

'

3,590,000,000

3,604,000,000

3,546,000,000

'

Carrying value, Preferred stock

50,000,000

'

'

'

140,000,000

'

'

'

50,000,000

140,000,000

260,000,000

'

Average Common Equity

317,000,000

'

'

'

298,000,000

'

'

'

317,000,000

298,000,000

273,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

125,600,000

133,000,000

173,300,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

3,300,000

0

0

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

0

0

'

Other noninterest income

'

'

'

'

'

'

'

'

37,800,000

33,700,000

37,400,000

'

Noninterest expense

'

'

'

'

'

'

'

'

131,800,000

133,600,000

139,300,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

28,300,000

33,100,000

71,400,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

9,500,000

11,300,000

24,800,000

'

Net income (loss)

'

'

'

'

'

'

'

'

18,800,000

21,800,000

46,600,000

'

Cash and due from banks

79,000,000

'

'

'

59,000,000

'

'

'

79,000,000

59,000,000

73,000,000

'

Assets

3,980,000,000

'

'

'

4,061,000,000

'

'

'

3,980,000,000

4,061,000,000

4,100,000,000

'

Total shareholders' equity

367,000,000

'

'

'

438,000,000

'

'

'

367,000,000

438,000,000

533,000,000

'

Vectra [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

102,700,000

108,700,000

104,300,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-4,900,000

7,000,000

14,000,000

'

Money Market Funds, at Carrying Value

6,000,000

'

'

'

31,000,000

'

'

'

6,000,000

31,000,000

52,000,000

'

Investment and Trading Securities

166,000,000

'

'

'

187,000,000

'

'

'

166,000,000

187,000,000

227,000,000

'

Loans and Leases Receivable, Net of Deferred Income

2,278,000,000

'

'

'

2,128,000,000

'

'

'

2,278,000,000

2,128,000,000

1,914,000,000

'

Deposits

2,178,000,000

'

'

'

2,164,000,000

'

'

'

2,178,000,000

2,164,000,000

2,004,000,000

'

Carrying value, Preferred stock

70,000,000

'

'

'

70,000,000

'

'

'

70,000,000

70,000,000

70,000,000

'

Average Common Equity

246,000,000

'

'

'

224,000,000

'

'

'

246,000,000

224,000,000

200,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

107,600,000

101,700,000

90,300,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

100,000

600,000

800,000

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

0

-28,900,000

'

Other noninterest income

'

'

'

'

'

'

'

'

24,600,000

25,300,000

21,700,000

'

Noninterest expense

'

'

'

'

'

'

'

'

99,500,000

98,300,000

100,700,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

32,600,000

28,100,000

-18,400,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

11,200,000

9,200,000

-8,300,000

'

Net income (loss)

'

'

'

'

'

'

'

'

21,400,000

18,900,000

-10,100,000

'

Cash and due from banks

51,000,000

'

'

'

58,000,000

'

'

'

51,000,000

58,000,000

55,000,000

'

Assets

2,571,000,000

'

'

'

2,511,000,000

'

'

'

2,571,000,000

2,511,000,000

2,341,000,000

'

Total shareholders' equity

316,000,000

'

'

'

294,000,000

'

'

'

316,000,000

294,000,000

270,000,000

'

TCBW [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

0

'

'

'

0

0

0

'

Net interest income

'

'

'

'

'

'

'

'

27,300,000

27,400,000

29,600,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-1,800,000

400,000

7,800,000

'

Money Market Funds, at Carrying Value

181,000,000

'

'

'

251,000,000

'

'

'

181,000,000

251,000,000

143,000,000

'

Investment and Trading Securities

91,000,000

'

'

'

104,000,000

'

'

'

91,000,000

104,000,000

126,000,000

'

Loans and Leases Receivable, Net of Deferred Income

630,000,000

'

'

'

571,000,000

'

'

'

630,000,000

571,000,000

562,000,000

'

Deposits

793,000,000

'

'

'

791,000,000

'

'

'

793,000,000

791,000,000

693,000,000

'

Carrying value, Preferred stock

3,000,000

'

'

'

3,000,000

'

'

'

3,000,000

3,000,000

15,000,000

'

Average Common Equity

87,000,000

'

'

'

82,000,000

'

'

'

87,000,000

82,000,000

75,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

29,100,000

27,000,000

21,800,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

0

0

0

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

-2,700,000

0

-4,800,000

'

Other noninterest income

'

'

'

'

'

'

'

'

4,100,000

3,800,000

3,500,000

'

Noninterest expense

'

'

'

'

'

'

'

'

18,800,000

18,900,000

16,700,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

11,700,000

11,900,000

3,800,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

4,000,000

4,000,000

1,100,000

'

Net income (loss)

'

'

'

'

'

'

'

'

7,700,000

7,900,000

2,700,000

'

Cash and due from banks

28,000,000

'

'

'

22,000,000

'

'

'

28,000,000

22,000,000

28,000,000

'

Assets

943,000,000

'

'

'

961,000,000

'

'

'

943,000,000

961,000,000

874,000,000

'

Total shareholders' equity

90,000,000

'

'

'

85,000,000

'

'

'

90,000,000

85,000,000

90,000,000

'

Other Banks [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

-3,000,000

'

'

'

0

-3,000,000

-2,000,000

'

Net interest income

'

'

'

'

'

'

'

'

-155,800,000

-190,600,000

-266,200,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-400,000

500,000

0

'

Money Market Funds, at Carrying Value

-207,000,000

'

'

'

444,000,000

'

'

'

-207,000,000

444,000,000

-91,000,000

'

Investment and Trading Securities

719,000,000

'

'

'

519,000,000

'

'

'

719,000,000

519,000,000

437,000,000

'

Loans and Leases Receivable, Net of Deferred Income

64,000,000

'

'

'

63,000,000

'

'

'

64,000,000

63,000,000

69,000,000

'

Deposits

-912,000,000

'

'

'

-64,000,000

'

'

'

-912,000,000

-64,000,000

-926,000,000

'

Carrying value, Preferred stock

93,000,000

'

'

'

42,000,000

'

'

'

93,000,000

42,000,000

497,000,000

'

Average Common Equity

-317,000,000

'

'

'

-645,000,000

'

'

'

-317,000,000

-645,000,000

-569,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

-155,400,000

-191,100,000

-266,200,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

154,000,000

100,300,000

32,100,000

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

2,700,000

9,200,000

77,600,000

'

Other noninterest income

'

'

'

'

'

'

'

'

-24,600,000

-23,700,000

-28,100,000

'

Noninterest expense

'

'

'

'

'

'

'

'

154,400,000

29,200,000

19,900,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

-485,700,000

-335,100,000

-268,700,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

-162,200,000

-120,700,000

-80,200,000

'

Net income (loss)

'

'

'

'

'

'

'

'

-323,500,000

-214,400,000

-188,500,000

'

Cash and due from banks

-17,000,000

'

'

'

8,000,000

'

'

'

-17,000,000

8,000,000

0

'

Assets

740,000,000

'

'

'

1,286,000,000

'

'

'

740,000,000

1,286,000,000

642,000,000

'

Total shareholders' equity

-224,000,000

'

'

'

-606,000,000

'

'

'

-224,000,000

-606,000,000

-74,000,000

'

Consolidated Company [Member]

'

'

'

'

'

'

'

'

'

'

'

'

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

Stockholders' Equity Attributable to Noncontrolling Interest

0

'

'

'

-3,000,000

'

'

'

0

-3,000,000

-2,000,000

'

Net interest income

'

'

'

'

'

'

'

'

1,696,300,000

1,731,900,000

1,756,200,000

'

Provision for loan losses

'

'

'

'

'

'

'

'

-87,100,000

14,200,000

74,500,000

'

Money Market Funds, at Carrying Value

8,457,000,000

'

'

'

8,754,000,000

'

'

'

8,457,000,000

8,754,000,000

7,123,000,000

'

Investment and Trading Securities

4,325,000,000

'

'

'

3,877,000,000

'

'

'

4,325,000,000

3,877,000,000

4,079,000,000

'

Loans and Leases Receivable, Net of Deferred Income

39,043,000,000

'

'

'

37,665,000,000

'

'

'

39,043,000,000

37,665,000,000

37,258,000,000

'

Deposits

46,362,000,000

'

'

'

46,133,000,000

'

'

'

46,362,000,000

46,133,000,000

42,876,000,000

'

Carrying value, Preferred stock

1,004,000,000

'

'

'

1,128,000,000

'

'

'

1,004,000,000

1,128,000,000

2,377,000,000

'

Average Common Equity

5,461,000,000

'

'

'

4,924,000,000

'

'

'

5,461,000,000

4,924,000,000

4,608,000,000

'

Net interest income after provision for loan losses

'

'

'

'

'

'

'

'

1,783,400,000

1,717,700,000

1,681,700,000

'

Net impairment losses on investment securities

'

'

'

'

'

'

'

'

165,100,000

104,100,000

33,700,000

'

Loss on sale of investment securities to Parent

'

'

'

'

'

'

'

'

0

0

0

'

Other noninterest income

'

'

'

'

'

'

'

'

502,500,000

524,000,000

531,900,000

'

Noninterest expense

'

'

'

'

'

'

'

'

1,714,400,000

1,596,000,000

1,658,600,000

'

Income (loss) before income taxes

'

'

'

'

'

'

'

'

406,400,000

541,600,000

521,300,000

'

Income Tax Expense (Benefit)

'

'

'

'

'

'

'

'

142,900,000

193,400,000

198,600,000

'

Net income (loss)

'

'

'

'

'

'

'

'

263,500,000

348,200,000

322,700,000

'

Cash and due from banks

1,175,000,000

'

'

'

1,842,000,000

'

'

'

1,175,000,000

1,842,000,000

1,224,000,000

'

Assets

56,031,000,000

'

'

'

55,512,000,000

'

'

'

56,031,000,000

55,512,000,000

53,149,000,000

'

Total shareholders' equity

$6,465,000,000

'

'

'

$6,049,000,000

'

'

'

$6,465,000,000

$6,049,000,000

$6,983,000,000

'

Quarterly_Financial_Informatio1

Quarterly Financial Information (Financial Information By Quarter) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Gross interest income	$490,017	$473,407	$493,233	$484,748	$498,257	$509,000	$512,588	$518,877	$1,941,405	$2,038,722	$2,188,581
Net interest income	432,035	415,521	430,657	418,115	429,957	438,161	426,344	437,478	1,696,328	1,731,940	1,756,185
Provision for loan losses	-30,538	-5,573	-21,990	-29,035	-10,401	-1,889	10,853	15,664	-87,136	14,227	74,532
Net impairment losses on investment securities	-141,733	-9,067	-4,217	-10,117	83,808	2,736	7,308	10,209	-165,134	-104,061	-33,683
Investment securities gains (losses), net	-6,310	4,745	1,056	6,131	9,577	5,729	5,626	9,865	5,622	30,797	'
Other noninterest income	116,893	126,512	128,309	125,205	128,390	122,233	130,347	112,164	496,919	493,134	'
Noninterest expense	494,750	370,663	451,678	397,348	407,014	394,975	401,656	392,372	1,714,439	1,596,017	1,658,564
Income before income taxes	-63,327	172,621	126,117	171,021	87,503	170,301	142,500	141,262	406,432	541,566	521,273
Net income (loss)	-41,472	111,514	83,026	110,387	57,686	109,597	91,464	89,403	263,455	348,150	322,690
Net income (loss) applicable to controlling interest	'	'	'	'	58,252	109,851	91,737	89,676	263,791	349,516	323,804
Net income (loss) applicable to controlling interest	-41,472	111,514	83,026	110,723	'	'	'	'	263,791	349,516	323,804
Preferred stock dividends	17,965	27,507	27,641	22,399	22,647	47,529	36,522	64,187	-95,512	-170,885	-170,414
Preferred stock redemption	125,700	0	0	0	'	'	'	'	125,700	0	0
Net earnings applicable to common shareholders	($59,437)	$209,707	$55,385	$88,324	$35,605	$62,322	$55,215	$25,489	$293,979	$178,631	$153,390
Basic, per share	($0.32)	$1.13	$0.30	$0.48	$0.19	$0.34	$0.30	$0.14	$1.58	$0.97	$0.83
Diluted	($0.32)	$1.12	$0.30	$0.48	$0.19	$0.34	$0.30	$0.14	$1.58	$0.97	$0.83

Parent_Company_Financial_Infor2

Parent Company Financial Information (Condensed Balance Sheets) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
In Thousands, unless otherwise specified
Held-to-maturity, fair value	$609,547	$674,741	'	'
Cash and due from banks	1,175,083	1,841,907	1,224,350	924,126
Interest-bearing deposits	8,175,048	5,978,978	'	'
Held-to-maturity Securities	588,981	756,909	'	'
Available-for-sale, at fair value	3,701,886	3,091,310	'	'
Other noninterest-bearing investments	855,642	855,462	'	'
Other assets	926,228	1,290,917	'	'
Total assets	56,031,127	55,511,918	'	'
Other liabilities	501,056	533,660	'	'
Other short-term borrowings	0	5,409	'	'
Long-term debt	2,273,575	2,337,113	'	'
Total liabilities	49,566,564	49,463,277	'	'
Preferred stock	1,003,970	1,128,302	'	'
Common stock	4,179,024	4,166,109	'	'
Retained earnings	1,473,670	1,203,815	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-192,101	-446,157	-592,084	'
Total shareholders' equity	6,464,563	6,048,641	6,983,228	6,647,214
Total liabilities and shareholders' equity	56,031,127	55,511,918	'	'
Allowance for loan losses	746,291	896,087	1,051,685	'
Parent Company [Member]	'	'	'	'
Held-to-maturity, fair value	31,422	22,112	'	'
Cash and due from banks	902,697	2,001	11	1,848
Interest-bearing deposits	72	75,808	'	'
Security Resell Agreements Amount Outstanding	0	575,000	'	'
Held-to-maturity Securities	17,359	22,679	'	'
Available-for-sale, at fair value	675,895	461,665	'	'
Loans, net of unearned fees of $0 and $0 and allowance for loan losses of $23 and $71	0	1,277	'	'
Other noninterest-bearing investments	37,154	50,799	'	'
Other assets	278,392	311,093	'	'
Total assets	8,687,930	8,248,731	'	'
Other liabilities	200,729	106,159	'	'
Subordinated debt to affiliated trusts	15,464	309,278	'	'
Total liabilities	2,223,367	2,196,662	'	'
Preferred stock	1,003,970	1,128,302	'	'
Common stock	4,179,024	4,166,109	'	'
Retained earnings	1,473,670	1,203,815	'	'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-192,101	-446,157	'	'
Total shareholders' equity	6,464,563	6,052,069	'	'
Total liabilities and shareholders' equity	8,687,930	8,248,731	'	'
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	0	0	'	'
Allowance for loan losses	0	23	'	'
Parent Company [Member] | Due To Others [Member]	'	'	'	'
Other short-term borrowings	0	4,951	'	'
Long-term debt	2,007,157	1,776,274	'	'
Parent Company [Member] | Due To Affiliates [Member]	'	'	'	'
Long-term debt	17	0	'	'
Parent Company [Member] | Nonoperating - ZMFU II, Inc. [Member]	'	'	'	'
Investments in subsidiaries	44,511	43,012	'	'
Parent Company [Member] | Other Operating Companies [Member]	'	'	'	'
Investments in subsidiaries	31,535	36,516	'	'
Parent Company [Member] | Commercial Banks And Bank Holding Company [Member]	'	'	'	'
Investments in subsidiaries	$6,700,315	$6,668,881	'	'

Parent_Company_Financial_Infor3

Parent Company Financial Information (Condensed Statements Of Income) (Details) (USD $)	3 Months Ended								12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other loans and securities	'	'	'	'	'	'	'	'	$1,814,600	$1,889,884	$2,049,928
Total interest income	490,017	473,407	493,233	484,748	498,257	509,000	512,588	518,877	1,941,405	2,038,722	2,188,581
Total interest expense	'	'	'	'	'	'	'	'	245,077	306,782	432,396
Net interest loss	-432,035	-415,521	-430,657	-418,115	-429,957	-438,161	-426,344	-437,478	-1,696,328	-1,731,940	-1,756,185
Provision for loan losses	30,538	5,573	21,990	29,035	10,401	1,889	-10,853	-15,664	87,136	-14,227	-74,532
Net interest loss after provision for loan losses	'	'	'	'	'	'	'	'	1,783,464	1,717,713	1,681,653
Net impairment losses on investment securities	-141,733	-9,067	-4,217	-10,117	83,808	2,736	7,308	10,209	-165,134	-104,061	-33,683
Other income (loss)	'	'	'	'	'	'	'	'	17,940	13,129	29,607
Total noninterest income	'	'	'	'	'	'	'	'	337,407	419,870	498,184
Salaries and employee benefits	'	'	'	'	'	'	'	'	912,918	885,661	874,293
Total noninterest expense	494,750	370,663	451,678	397,348	407,014	394,975	401,656	392,372	1,714,439	1,596,017	1,658,564
Income taxes (benefit)	'	'	'	'	'	'	'	'	142,977	193,416	198,583
Net Income (Loss) Attributable to Parent	-41,472	111,514	83,026	110,723	'	'	'	'	263,791	349,516	323,804
Preferred stock dividends	-17,965	-27,507	-27,641	-22,399	-22,647	-47,529	-36,522	-64,187	95,512	170,885	170,414
Net earnings applicable to common shareholders	-59,437	209,707	55,385	88,324	35,605	62,322	55,215	25,489	293,979	178,631	153,390
Parent Company [Member]	'	'	'	'	'	'	'	'	'	'	'
Commercial bank subsidiaries	'	'	'	'	'	'	'	'	757	836	2,519
Other subsidiaries and affiliates	'	'	'	'	'	'	'	'	105	386	63
Other loans and securities	'	'	'	'	'	'	'	'	17,764	18,993	13,640
Total interest income	'	'	'	'	'	'	'	'	18,626	20,215	16,222
Affiliated trusts	'	'	'	'	'	'	'	'	8,483	24,053	24,027
Other borrowed funds	'	'	'	'	'	'	'	'	171,304	195,195	274,843
Total interest expense	'	'	'	'	'	'	'	'	179,787	219,248	298,870
Net interest loss	'	'	'	'	'	'	'	'	161,161	199,033	282,648
Provision for loan losses	'	'	'	'	'	'	'	'	23	10	38
Net interest loss after provision for loan losses	'	'	'	'	'	'	'	'	-161,138	-199,023	-282,610
Equity and fixed income securities gains (losses), net	'	'	'	'	'	'	'	'	-7,332	86	426
Net impairment losses on investment securities	'	'	'	'	'	'	'	'	95,637	74,153	26,810
Other income (loss)	'	'	'	'	'	'	'	'	-8,397	-6,562	4,203
Total noninterest income	'	'	'	'	'	'	'	'	310,240	221,417	63,320
Salaries and employee benefits	'	'	'	'	'	'	'	'	26,014	20,507	19,033
Extinguishment of Debt, Amount	'	'	'	'	'	'	'	'	120,192	0	0
Other operating expenses	'	'	'	'	'	'	'	'	1,436	395	4,176
Total noninterest expense	'	'	'	'	'	'	'	'	147,642	20,902	23,209
Income (loss) before income taxes and undistributed income (loss) of consolidated subsidiaries	'	'	'	'	'	'	'	'	1,460	1,492	-242,499
Income taxes (benefit)	'	'	'	'	'	'	'	'	-133,798	-108,541	-104,395
Income before equity in undistributed income (loss) of consolidated subsidiaries	'	'	'	'	'	'	'	'	135,258	110,033	-138,104
Net Income (Loss) Attributable to Parent	'	'	'	'	'	'	'	'	263,791	349,516	323,804
Preferred stock dividends	'	'	'	'	'	'	'	'	-95,512	-170,885	-170,414
Preferred stock redemption	'	'	'	'	'	'	'	'	125,700	0	0
Net earnings applicable to common shareholders	'	'	'	'	'	'	'	'	293,979	178,631	153,390
Parent Company [Member] | Nonoperating - ZMFU II, Inc. [Member]	'	'	'	'	'	'	'	'	'	'	'
Dividends from consolidated subsidiaries	'	'	'	'	'	'	'	'	0	50,000	0
Equity in undistributed income (loss) of consolidated subsidiaries	'	'	'	'	'	'	'	'	514	-49,515	789
Parent Company [Member] | Other Operating Companies [Member]	'	'	'	'	'	'	'	'	'	'	'
Dividends from consolidated subsidiaries	'	'	'	'	'	'	'	'	200	5,440	14,151
Equity in undistributed income (loss) of consolidated subsidiaries	'	'	'	'	'	'	'	'	-4,887	-15,561	-27,687
Parent Company [Member] | Commercial Banks And Bank Holding Company [Member]	'	'	'	'	'	'	'	'	'	'	'
Dividends from consolidated subsidiaries	'	'	'	'	'	'	'	'	421,406	246,606	71,350
Equity in undistributed income (loss) of consolidated subsidiaries	'	'	'	'	'	'	'	'	$132,906	$304,559	$488,806

Parent_Company_Financial_Infor4

Parent Company Financial Information (Condensed Statements Of Cash Flows) (Details) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net income (loss) applicable to controlling interest	$263,791	$349,516	$323,804
Net cash used in operating activities	876,566	736,195	1,068,748
Net cash provided by (used in) investing activities	-1,393,160	-1,879,542	-2,464,125
Net change in short-term funds borrowed	-12,274	-370,264	-208,541
Proceeds from issuance of long-term debt	646,408	757,610	106,065
Repayments of long-term debt	-832,122	-372,891	-8,663
Payments of Debt Extinguishment Costs	45,812	0	0
Other, net	-10,252	-7,533	-3,508
Net cash provided by (used in) financing activities	-150,230	1,760,904	1,695,601
Net increase (decrease) in cash and due from banks	-666,824	617,557	300,224
Cash and Due From Banks - Beginning of Year	1,175,083	1,841,907	1,224,350
Interest paid	191,897	214,673	263,338
Asset Impairment Charges	165,134	106,545	35,686
Other Noncash Income (Expense)	-1,356	29,002	1,691
Parent Company [Member]	'	'	'
Net income (loss) applicable to controlling interest	263,791	349,516	323,804
Undistributed net losses (income) of consolidated subsidiaries	128,533	239,483	461,908
Net cash used in operating activities	420,185	188,562	-83,789
Net decrease (increase) in interest-bearing deposits	650,736	305,668	-408,811
Collection of advances to subsidiaries	10,000	23,190	6,425
Advances to subsidiaries	10,000	23,000	6,250
Proceeds from Sale and Maturity of Marketable Securities	27,916	5,433	1,259,262
Purchases of investment securities	4,858	3,980	575,887
Decrease (increase) of investment in subsidiaries	175,000	764,290	113,834
Other, net	10,642	3,814	9,642
Net cash provided by (used in) investing activities	859,436	1,075,415	398,215
Net change in short-term funds borrowed	-3,368	-110,995	-165,500
Proceeds from issuance of long-term debt	646,408	757,610	101,821
Repayments of long-term debt	835,031	372,312	117,975
Payments of Debt Extinguishment Costs	-45,812	0	0
Proceeds from issuance of preferred stock	784,318	141,342	0
Proceeds from issuance of common stock and warrants	9,825	1,898	25,686
Cash paid for preferred stock redemption	799,468	1,542,500	0
Dividends paid on preferred stock	95,512	126,189	148,774
Dividends paid on common stock	24,148	7,392	7,361
Other, net	-16,137	-3,449	-4,160
Net cash provided by (used in) financing activities	-378,925	-1,261,987	-316,263
Net increase (decrease) in cash and due from banks	900,696	1,990	-1,837
Cash and Due From Banks - Beginning of Year	902,697	2,001	11
Interest paid	125,900	124,100	126,700
Asset Impairment Charges	95,637	74,153	26,810
Extinguishment of Debt, Amount	120,192	0	0
Other Noncash Income (Expense)	$69,098	$4,376	$27,505