Zions Bancorporation, National Association (ZION) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Oct. 31, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'	'10-Q	'
Amendment Flag	'	'false	'
Document Period End Date	'	30-Sep-13	'
Document Fiscal Year Focus	'2013	'2013	'
Document Fiscal Period Focus	'	'Q3	'
Trading Symbol	'	'zion	'
Entity Registrant Name	'	'ZIONS BANCORPORATION /UT/	'
Entity Central Index Key	'	'0000109380	'
Current Fiscal Year End Date	'	'--12-31	'
Entity Filer Category	'	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	'	184,615,234

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
ASSETS	'	'
Cash and due from banks	$1,365,082	$1,841,907
Money market investments:	'	'
Interest-bearing deposits	8,180,639	5,978,978
Federal funds sold and security resell agreements	209,070	2,775,354
Investment securities:	'	'
Held-to-maturity, at adjusted cost (approximate fair value $727,908 and $674,741)	777,849	756,909
Available-for-sale, at fair value	3,333,889	3,091,310
Trading account, at fair value	38,278	28,290
Marketable securities, total	4,150,016	3,876,509
Loans held for sale	114,810	251,651
Loans, net of unearned income and fees:	'	'
Loans and Leases Receivable, Net of Deferred Income	37,897,869	37,137,006
FDIC-supported loans	374,861	528,241
Loans and leases receivable, net of deferred income, covered and not covered	38,272,730	37,665,247
Less allowance for loan losses	797,523	896,087
Loans and Leases Receivable, Net Reported Amount, Covered and Not Covered	37,475,207	36,769,160
Other noninterest-bearing investments	851,349	855,462
Premises and equipment, net	720,365	708,882
Goodwill	1,014,129	1,014,129
Core deposit and other intangibles	39,667	50,818
Other real estate owned	66,381	98,151
Other assets	1,001,597	1,290,917
Total assets	55,188,312	55,511,918
LIABILITIES AND SHAREHOLDERS' EQUITY	'	'
Noninterest-bearing demand	18,566,137	18,469,458
Interest-bearing:	'	'
Savings and money market	22,806,132	22,896,624
Time	2,689,688	2,962,931
Foreign	1,607,409	1,804,060
Total deposits	45,669,366	46,133,073
Securities sold, not yet purchased	21,183	26,735
Federal funds purchased and security repurchase agreements	252,591	320,478
Other short-term borrowings	0	5,409
Long-term debt	2,304,301	2,337,113
Reserve for unfunded lending commitments	84,147	106,809
Other liabilities	523,915	533,660
Total liabilities	48,855,503	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 184,600,005 and 184,199,198 shares	4,172,887	4,166,109
Retained earnings	1,540,455	1,203,815
Accumulated other comprehensive income (loss)	-384,503	-446,157
Controlling interest shareholders' equity	6,332,809	6,052,069
Noncontrolling interests	0	-3,428
Total shareholders' equity	6,332,809	6,048,641
Total liabilities and shareholders' equity	$55,188,312	$55,511,918

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]	'	'
Held-to-maturity, fair value	$727,908	$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	184,600,005	184,199,198
Common stock, outstanding shares	184,600,005	184,199,198

Consolidated_Statements_Of_Inc

Consolidated Statements Of Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income:	'	'	'	'
Interest and fees on loans	$442,366	$473,162	$1,356,107	$1,427,882
Interest on money market investments	6,175	5,349	17,378	15,076
Interest on securities:	'	'	'	'
Held-to-maturity	7,739	8,337	23,559	26,621
Available-for-sale	16,917	22,042	53,657	70,290
Trading account	210	110	687	596
Total interest income	473,407	509,000	1,451,388	1,540,465
Interest expense:	'	'	'	'
Interest on deposits	14,506	19,049	45,291	63,285
Interest on short-term borrowings	71	193	241	1,228
Interest on long-term debt	43,309	51,597	141,563	173,969
Total interest expense	57,886	70,839	187,095	238,482
Net interest income	415,521	438,161	1,264,293	1,301,983
Provision for loan losses	-5,573	-1,889	-56,598	24,628
Net interest income after provision for loan losses	421,094	440,050	1,320,891	1,277,355
Noninterest income:	'	'	'	'
Service charges and fees on deposit accounts	44,701	44,951	132,610	131,909
Other service charges, commissions and fees	45,977	44,679	134,596	127,923
Trust and wealth management income	7,120	6,521	21,846	20,952
Capital markets and foreign exchange	7,309	6,026	21,535	19,102
Dividends and other investment income	12,101	11,686	36,164	42,708
Loan sales and servicing income	8,464	10,695	30,138	29,334
Fair value and nonhedge derivative loss	-4,403	-5,820	-12,805	-17,004
Equity securities gains, net	3,165	2,683	8,206	11,935
Fixed income securities gains, net	1,580	3,046	3,726	9,285
Impairment losses on investment securities:	'	'	'	'
Impairment losses on investment securities	-10,470	-3,876	-46,873	-46,175
Non-credit losses on secutities not expectd to be sold (recognized in other comprehensive income	1,403	1,140	23,472	25,922
Net impairment losses on investment securities	-9,067	-2,736	-23,401	-20,253
Other noninterest income	5,243	3,495	15,942	9,820
Total noninterest income	122,190	125,226	368,557	365,711
Noninterest expense:	'	'	'	'
Salaries and employee benefits	229,185	220,223	686,302	665,622
Occupancy, net	28,230	28,601	83,570	84,721
Equipment, software and furniture	26,560	27,122	79,179	81,216
Other real estate expense	-831	207	2,736	14,457
Credit-related expense	7,265	13,316	27,144	39,216
Provision for unfunded lending commitments	-19,935	2,264	-22,662	3,428
Professional and legal services	16,462	12,749	44,082	36,792
Advertising	6,091	7,326	17,791	19,751
FDIC premiums	9,395	11,278	29,230	32,641
Amortization of core deposit and other intangibles	3,570	4,241	11,151	12,794
Debt Extinguishment Cost	0	0	40,282	0
Other	64,671	67,648	220,884	198,365
Total noninterest expense	370,663	394,975	1,219,689	1,189,003
Income before income taxes	172,621	170,301	469,759	454,063
Income taxes	61,107	60,704	164,832	163,599
Net income	111,514	109,597	304,927	290,464
Net loss applicable to noncontrolling interests	0	-254	-336	-800
Net income applicable to controlling interest	111,514	109,851	305,263	291,264
Preferred stock dividends	-27,507	-47,529	-77,547	-148,238
Preferred Stock Redemption	125,700	0	125,700	0
Net earnings applicable to common shareholders	209,707	62,322	353,416	143,026
Weighted average common shares outstanding during the period:	'	'	'	'
Basic shares	184,112	183,237	183,721	183,008
Diluted shares	184,742	183,383	184,144	183,162
Net earnings per common share:	'	'	'	'
Basic	$1.13	$0.34	$1.90	$0.77
Diluted	$1.12	$0.34	$1.90	$0.77
Retained Earnings [Member]	'	'	'	'
Noninterest expense:	'	'	'	'
Net income	'	'	$305,263	$291,264

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$111,514	$109,597	$304,927	$290,464
Other comprehensive income (loss), net of tax:	'	'	'	'
Unrealized holding gains (losses) on investment securities	-14,159	43,484	63,937	72,529
Noncredit-related impairment losses on securities not expected to be sold	-867	-703	-13,751	-16,006
Reclassification to earnings for realized net fixed income securities losses	-976	-1,881	-2,301	-5,868
Reclassification to earnings for net credit-related impairment losses on investment securities	5,588	1,690	14,136	12,296
Accretion of securities with noncredit-related impairment losses not expected to be sold	285	192	880	724
Net unrealized holding gains (losses) on derivative instruments	239	48	236	225
Reclassification adjustment for increase in interest income recognized in earnings on derivatives instruments	-57	-1,421	-1,483	-6,554
Other comprehensive income (loss)	-9,947	41,409	61,654	57,346
Comprehensive income	101,567	151,006	366,581	347,810
Comprehensive loss applicable to noncontrolling interests	0	-254	-336	-800
Comprehensive income applicable to controlling interest	$101,567	$151,260	$366,917	$348,610

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, 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) for the period	290,464	'	'	291,264	'	-800
Other comprehensive income	57,346	'	'	'	57,346	'
Stock Issued During Period, Value, New Issues	141,342	143,750	2,408	'	'	'
Stock Redeemed or Called During Period, Value	-1,542,500	-1,542,500	3,830	-3,830	'	'
Subordinated debt converted to preferred stock	85,352	99,871	-14,519	'	'	'
Net activity under employee plans and related tax benefits, shares	'	'	21,014	'	'	'
Net activity under employee plans and related tax benefits	11,856	'	11,856	'	'	'
Dividends on preferred stock	-103,542	44,696	'	-148,238	'	'
Dividends on common stock	-5,546	'	'	-5,546	'	'
Change in deferred compensation	237	'	'	237	'	'
Other changes in noncontrolling interests	18	'	'	'	'	18
Balance at Sep. 30, 2012	5,918,255	1,123,377	4,162,001	1,170,477	-534,738	-2,862
Balance (in shares) at Sep. 30, 2012	'	'	184,156,402	'	'	'
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) for the period	304,927	'	'	305,263	'	-336
Other comprehensive income	61,654	'	'	'	61,654	'
Stock Issued During Period, Value, New Issues	800,000	800,000	-15,627	'	'	'
Issuance of preferred stock	784,373	'	'	'	'	'
Preferred Stock Redemption	-799,468	-925,748	580	125,700	'	'
Subordinated debt converted to preferred stock	1,210	1,416	-206	'	'	'
Net activity under employee plans and related tax benefits, shares	'	'	400,807	'	'	'
Net activity under employee plans and related tax benefits	26,197	'	26,197	'	'	'
Dividends on preferred stock	-77,547	'	'	-77,547	'	'
Dividends on common stock	-16,667	'	'	-16,667	'	'
Change in deferred compensation	-109	'	'	-109	'	'
Other changes in noncontrolling interests	-402	'	-4,166	'	'	3,764
Balance at Sep. 30, 2013	$6,332,809	$1,003,970	$4,172,887	$1,540,455	($384,503)	$0
Balance (in shares) at Sep. 30, 2013	184,600,005	'	184,600,005	'	'	'

Consolidated_Statements_Of_Cha1

Consolidated Statements Of Changes In Shareholders' Equity (Parenthetical) (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Dividends on common stock, per share	$0.09	$0.03

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES	'	'	'	'
Net income for the period	$111,514	$109,597	$304,927	$290,464
Adjustments to reconcile net income to net cash provided by operating activities:	'	'	'	'
Debt extinguishment cost	0	0	40,282	0
Net impairment losses on investment securities	9,067	2,736	23,401	20,253
Provision for credit losses	-25,508	375	-79,260	28,056
Depreciation and amortization	42,134	47,810	133,893	167,119
Deferred income tax expense (benefit)	5,832	6,458	-612	25,513
Net decrease (increase) in trading securities	-11,876	6,576	-10,005	26,310
Net decrease (increase) in loans held for sale	49,696	-77,225	173,142	-5,848
Net write-downs of and gains/losses from sales of other real estate owned	-1,824	309	-1,332	13,650
Change in other liabilities	28,047	-10,692	-17,463	-41,222
Change in other assets	70,753	21,314	243,428	110,137
Other, net	-5,362	-13,692	-16,568	-32,064
Net cash provided by operating activities	272,473	93,566	793,833	602,368
CASH FLOWS FROM INVESTING ACTIVITIES	'	'	'	'
Net decrease (increase) in money market investments	12,100	490,947	364,623	-356,703
Proceeds from maturities and paydowns of investment securities held-to-maturity	14,404	37,016	95,841	91,701
Purchases of investment securities held-to-maturity	-8,121	-4,450	-128,089	-38,188
Proceeds from sales, maturities, and paydowns of investment securities available-for-sale	246,147	187,180	864,643	863,354
Purchases of investment securities available-for-sale	-408,333	-73,636	-1,019,454	-667,566
Proceeds from sales of loans and leases	5,041	24,665	16,098	64,452
Net loan and lease originations	-112,316	-397,845	-744,263	-379,615
Net decrese (increase) in other noninterest-bearing investments	-62	2,549	19,972	14,723
Net purchases of premises and equipment	-20,905	-15,145	-63,438	-47,962
Proceeds from sales of other real estate owned	27,417	59,876	80,076	157,760
Net cash paid for divestitutes	3,786	2,667	3,786	-19,901
Net cash provided by (used in) investing activities	-240,842	313,824	-510,205	-317,945
CASH FLOWS FROM FINANCING ACTIVITIES	'	'	'	'
Net increase (decrease) in deposits	653,311	612,290	-463,707	926,287
Net change in short-term funds borrowed	17,159	-392,564	-78,848	-243,356
Proceeds from issuance of long-term debt	116,461	49,082	484,408	648,468
Repayments of long-term debt	-153	-7,604	-570,167	-262,783
Debt extinguishment cost paid	0	0	-23,305	0
Cash paid for preferred stock redemption	-799,468	-700,000	-799,468	-1,542,500
Proceeds from issuances of common and preferred stock	200,040	513	792,557	142,516
Dividends paid on common and preferred stock	-34,935	-32,770	-94,214	-109,088
Other, net	-2,061	-92	-7,709	-7,399
Net cash provided by (used in) financing activities	150,354	-471,145	-760,453	-447,855
Net increase (decrease) in cash and due from banks	181,985	-63,755	-476,825	-163,432
Cash and due from banks at beginning of period	1,183,097	1,124,673	1,841,907	1,224,350
Cash and due from banks at end of period	1,365,082	1,060,918	1,365,082	1,060,918
Cash paid for interest	45,134	65,384	149,047	172,712
Net cash paid for income taxes	$32,453	$67,772	$156,456	$127,456

Basis_of_Presentaion

Basis of Presentaion	9 Months Ended
	Sep. 30, 2013
Basis Of Presentation [Abstract]	'
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	'
	BASIS OF PRESENTATION
	The accompanying unaudited consolidated financial statements of Zions Bancorporation (“the Parent”) and its majority-owned subsidiaries (collectively “the Company,” “Zions,” “we,” “our,” “us”) have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. References to GAAP, including standards 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”). Certain prior period amounts have been reclassified to conform to the current period presentation.
	Operating results for the three and nine months ended September 30, 2013 and 2012 are not necessarily indicative of the results that may be expected in future periods. The consolidated balance sheet at December 31, 2012 is from the audited financial statements at that date, but does not include all of the information and footnotes required by GAAP for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company’s 2012 Annual Report on Form 10-K.
	The Company provides a full range of banking and related services through 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.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	3 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Information [Abstract]	'
Cash Flow, Supplemental Disclosures [Text Block]	'
	2	SUPPLEMENTAL CASH FLOW INFORMATION
	Noncash activities are summarized as follows:
	(In thousands)	Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Loans transferred to other real estate owned	$	12,098	$	37,140	$	52,916	$	141,439
	Beneficial conversion feature transferred from common stock to preferred stock as a result of subordinated debt conversions	—		917		206		14,519
	Subordinated debt converted to preferred stock	—		5,386		1,210		85,352
	Preferred stock transferred to common stock as a result of the Series C preferred stock redemption	580		—		580		—
	Preferred stock/beneficial conversion feature transferred to retained earnings as a result of the Series C preferred stock redemption	125,700		—		125,700		—

Cash_and_Money_Market_Investme

Cash and Money Market Investments	9 Months Ended
	Sep. 30, 2013
Gross and net information for selected financial instruments [Abstract]	'
Cash, Cash Equivalents, and Short-term Investments [Text Block]	'
	3	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. To provide convergence with disclosures under International Financial Reporting Standards (“IFRS”), 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 6 for further information regarding derivative instruments.
	Gross and net information for selected financial instruments in the balance sheet is as follows:
			September 30, 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		$	209,070	$	—		$	209,070	$	—		$	—		$	209,070
	Derivatives (included in other assets)		55,568		—			55,568		(8,282		)	—			47,286
			$	264,638	$	—		$	264,638	$	(8,282	)	$	—		$	256,356
	Liabilities:
	Federal funds purchased and security repurchase agreements		$	252,591	$	—		$	252,591	$	—		$	—		$	252,591
	Derivatives (included in other liabilities)		59,914		—			59,914		(8,282		)	(37,232		)	14,400
			$	312,505	$	—		$	312,505	$	(8,282	)	$	(37,232	)	$	266,991
			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)		81,810		—			81,810		(409		)	—			81,401
			$	3,757,164	$	(900,000	)	$	2,857,164	$	(409	)	$	—		$	2,856,755
	Liabilities:
	Federal funds purchased and security repurchase agreements		$	1,220,478	$	(900,000	)	$	320,478	$	—		$	—		$	320,478
	Derivatives (included in other liabilities)		89,100		—			89,100		(409		)	(81,683		)	7,008
			$	1,309,578	$	(900,000	)	$	409,578	$	(409	)	$	(81,683	)	$	327,486

Investment_Securities

Investment Securities	9 Months Ended
	Sep. 30, 2013
Investments [Abstract]	'
Investment Securities	'
	INVESTMENT SECURITIES
	Investment securities are summarized below. Note 9 discusses the process to estimate fair value for investment securities.
		September 30, 2013
					Recognized in OCI											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	$	558,134		$	—			$	—		$	558,134			$	11,537		$	5,061			$	564,610
	Asset-backed securities:
	Trust preferred securities – banks and insurance	255,159			—				54,432			200,727				5,879			55,058				151,548
	Other	21,061			—				2,173			18,888				900			8,138				11,650
	Other debt securities	100			—				—			100				—			—				100
		834,454			—				56,605			777,849				18,316			68,257				727,908
	Available-for-sale
	U.S. Treasury securities	39,908			136				—			40,044											40,044
	U.S. Government agencies and corporations:
	Agency securities	440,170			2,120				197			442,093											442,093
	Agency guaranteed mortgage-backed securities	308,964			11,619				609			319,974											319,974
	Small Business Administration loan-backed securities	1,139,211			27,829				1,614			1,165,426											1,165,426
	Municipal securities	64,694			1,509				1,034			65,169											65,169
	Asset-backed securities:
	Trust preferred securities – banks and insurance	1,521,628			14,391				534,123			1,001,896											1,001,896
	Trust preferred securities – real estate investment trusts	39,391			—				19,874			19,517											19,517
	Auction rate securities	6,506			135				16			6,625											6,625
	Other	18,496			406				2,788			16,114											16,114
		3,578,968			58,145				560,255			3,076,858											3,076,858
	Mutual funds and other	262,493			182				5,644			257,031											257,031
		3,841,461			58,327				565,899			3,333,889											3,333,889
	Total	$	4,675,915		$	58,327			$	622,504		$	4,111,738										$	4,061,797
		December 31, 2012
					Recognized in OCI											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
	The amortized cost and estimated fair value of investment debt securities are shown subsequently as of September 30, 2013 by expected maturity distribution for structured asset-backed collateralized debt obligations 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	$	66,525		$	66,502			$	466,546		$	441,052
Due after one year through five years	200,748			198,494				1,112,538			1,050,208
Due after five years through ten years	213,234			179,794				640,232			597,543
Due after ten years	353,947			283,118				1,359,652			988,055
	$	834,454		$	727,908			$	3,578,968		$	3,076,858
The following is a summary of the amount of gross unrealized losses for investment securities and the estimated fair value by length of time the securities have been in an unrealized loss position:
	September 30, 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	$	4,247		$	91,497			$	814		$	10,915			$	5,061		$	102,412
Asset-backed securities:
Trust preferred securities – banks and insurance	—			—				109,490			151,350				109,490			151,350
Other	—			—				10,311			11,291				10,311			11,291
	4,247			91,497				120,615			173,556				124,862			265,053
Available-for-sale
U.S. Government agencies and corporations:
Agency securities	119			24,255				78			6,495				197			30,750
Agency guaranteed mortgage-backed securities	605			41,847				4			609				609			42,456
Small Business Administration loan-backed securities	784			76,868				830			39,855				1,614			116,723
Municipal securities	20			2,871				1,014			8,507				1,034			11,378
Asset-backed securities:
Trust preferred securities – banks and insurance	1,138			54,760				532,985			840,551				534,123			895,311
Trust preferred securities – real estate investment trusts	—			—				19,874			19,518				19,874			19,518
Auction rate securities	—			—				16			896				16			896
Other	—			—				2,788			13,514				2,788			13,514
	2,666			200,601				557,589			929,945				560,255			1,130,546
Mutual funds and other	5,644			124,448				—			—				5,644			124,448
	8,310			325,049				557,589			929,945				565,899			1,254,994
Total	$	12,557		$	416,546			$	678,204		$	1,103,501			$	690,761		$	1,520,047
		December 31, 2012
		Less than 12 months							12 months or more							Total
	(In thousands)	Gross unrealized losses			Estimated fair value				Gross unrealized losses			Estimated fair value				Gross unrealized losses			Estimated fair 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
		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 September 30, 2013 and December 31, 2012, respectively, 207 and 84 held-to-maturity (“HTM”) and 258 and 256 available -for-sale (“AFS”) investment securities were in an unrealized loss position.
Other-Than-Temporary Impairment
We conduct a formal review of investment securities on a quarterly basis for the presence of other-than-temporary impairment (“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.
Credit-related OTTI is recognized in earnings while noncredit-related OTTI on securities not expected to be sold is recognized in other comprehensive income (“OCI”). Noncredit-related OTTI is based on other factors, including illiquidity. 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 2012 Annual Report on Form 10-K describes in more detail our OTTI evaluation process. The following summarizes the conclusions from our OTTI evaluation for those security types that have significant gross unrealized losses at September 30, 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. 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 for the three and nine months ended September 30, 2013.
OTTI – Asset-Backed Securities
Trust preferred securities – banks and insurance: These collateralized debt obligation (“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 Securities and Exchange Commission (“SEC”). The more junior securities were purchased generally at par, while the senior securities were purchased from Lockhart Funding LLC (“Lockhart”) 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 high. 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 dramatically higher than the contractual interest rates. Virtually all structured asset-backed security (“ABS”) fair values, including bank CDOs, deteriorated significantly during the recent financial 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 these 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 to model. The first feature unique to bank CDOs is the interest deferral feature previously noted. Throughout the financial 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. Our CDO pools include an issuer that first exercised this deferral option during the second quarter of 2008 and failed to come current within the allowable 20 quarter deferral period causing default. At September 30, 2013, 107 banks underlying our CDO tranches had come current after a period of deferral, while 158 were deferring, but remained within the allowed deferral period.
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 is instead used to pay down the principal balance of the most senior CDO securities. 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. 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.
Our ongoing review of these securities determined that OTTI should be recorded for the three and nine months ended September 30, 2013.
Trust preferred securities – real estate investment trusts (“REITs”): These CDO securities are variable rate pools of trust preferred securities primarily related to REITs, and are rated by one or more NRSROs. They were purchased generally at par. Unrealized losses were caused mainly by severe deterioration in mortgage REITs and homebuilder credit in addition to the same factors previously discussed for banks and insurance CDOs. Based on our review, OTTI for these securities was recorded for the three and nine months ended September 30, 2013.
Other asset-backed securities: Most of these CDO securities were purchased in 2009 from Lockhart at their carrying values and then adjusted to fair value. Certain of these CDOs consist of ABS CDOs (also known as diversified structured finance CDOs). Unrealized losses since acquisition were caused mainly by deterioration in collateral quality and widening of credit spreads for asset backed securities. Based on our review, OTTI for one of these securities was recorded for the three and nine months ended September 30, 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 for the three and nine months ended September 30, 2013.
OTTI – Mutual Funds and Other
A substantial portion of these securities is included in a mutual fund that consists primarily of fixed rate residential and agriculture mortgage-backed securities issued by the Government National Mortgage Association (“GNMA”). Contractual cash flows in the pool of mortgage loans are backed by the U.S. Government. Because the decline in fair value is not attributable to credit quality, no OTTI for these securities was recorded for the three and nine months ended September 30, 2013.
The following is a tabular rollforward of the total amount of credit-related OTTI:
(In thousands)	Three Months Ended										Nine Months Ended
	30-Sep-13										30-Sep-13
	HTM			AFS				Total			HTM				AFS			Total
Balance of credit-related OTTI at beginning	$	(13,952	)	$	(406,577	)		$	(420,529	)	$	(13,549	)		$	(394,494	)	$	(408,043	)
of period
Additions recognized in earnings during the period:
Credit-related OTTI on securities not previously impaired	—			(168		)		(168		)	(403		)		(168		)	(571		)
Additional credit-related OTTI on securities previously impaired	—			(8,899		)		(8,899		)	—				(22,830		)	(22,830		)
Subtotal of amounts recognized in earnings	—			(9,067		)		(9,067		)	(403		)		(22,998		)	(23,401		)
Reductions for securities sold or paid off during the period	—			—				—			—				1,848			1,848
Balance of credit-related OTTI at end of period	$	(13,952	)	$	(415,644	)		$	(429,596	)	$	(13,952	)		$	(415,644	)	$	(429,596	)
(In thousands)	Three Months Ended										Nine Months Ended
	30-Sep-12										30-Sep-12
	HTM			AFS				Total			HTM				AFS			Total
Balance of credit-related OTTI at beginning	$	(6,467	)	$	(315,183	)		$	(321,650	)	$	(6,126	)		$	(314,860	)	$	(320,986	)
of period
Additions recognized in earnings during the period:
Credit-related OTTI on securities not previously impaired	—			—				—			(341		)		—			(341		)
Additional credit-related OTTI on securities previously impaired	(657		)	(2,079		)		(2,736		)	(657		)		(19,255		)	(19,912		)
Subtotal of amounts recognized in earnings	(657		)	(2,079		)		(2,736		)	(998		)		(19,255		)	(20,253		)
Reductions for securities sold or paid off during the period	—			—				—			—				16,853			16,853
Balance of credit-related OTTI at end of period	$	(7,124	)	$	(317,262	)		$	(324,386	)	$	(7,124	)		$	(317,262	)	$	(324,386	)
To determine the credit component of OTTI for all security types, we utilize projected cash flows as the best estimate of fair value. These cash flows are credit adjusted using, among other things, assumptions for default probability assigned to each portion of performing and deferring collateral. The credit-adjusted cash flows are discounted at a security-specific coupon rate to identify any OTTI, and then at a market rate for valuation purposes.
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)	Three Months Ended							Nine Months Ended
	September 30,							September 30,
	2013			2012				2013			2012
HTM	$	—		$	—			$	16,114		$	16,718
AFS	1,403			1,140				7,358			9,204
	$	1,403		$	1,140			$	23,472		$	25,922
The following summarizes gains and losses, including OTTI, that were recognized in the statement of income:
		Three Months Ended														Nine Months Ended
		September 30, 2013							September 30, 2012							September 30, 2013							September 30, 2012
	(In thousands)	Gross gains			Gross losses				Gross gains			Gross losses				Gross gains			Gross losses				Gross gains		Gross losses
	Investment securities:
	Held-to-maturity	$	32		$	—			$	22		$	657			$	63		$	403			$	120	$	998
	Available-for-sale	1,551			9,070				3,026			2,081				7,989			27,324				14,955		25,045
	Other noninterest-bearing investments:
	Nonmarketable equity securities	4,802			1,637				3,230			547				9,868			1,662				22,951		11,016
		6,385			10,707				6,278			3,285				17,920			29,389				38,026		37,059
	Net gains (losses)				$	(4,322	)					$	2,993						$	(11,469	)				$	967
	Statement of income information:
	Net impairment losses on investment securities				$	(9,067	)					$	(2,736	)					$	(23,401	)				$	(20,253	)
	Equity securities gains, net				3,165							2,683							8,206						11,935
	Fixed income securities gains, net				1,580							3,046							3,726						9,285
	Net gains (losses)				$	(4,322	)					$	2,993						$	(11,469	)				$	967
Gains and losses on the sale of securities are recognized using the specific identification method and recorded in noninterest income.
During the three and nine months ended September 30, nontaxable interest income on securities was $3.4 million and $10.1 million in 2013 and $4.2 million and $13.7 million in 2012.
Securities with a carrying value of $1.5 billion at September 30, 2013 and December 31, 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.

Loans_And_Allowance_For_Credit

Loans And Allowance For Credit Losses	9 Months Ended
	Sep. 30, 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:
	(In thousands)	September 30,				December 31,
		2013				2012
	Loans held for sale	$	114,810			$	251,651
	Commercial:
	Commercial and industrial	$	11,904,477			$	11,256,945
	Leasing	375,125				422,513
	Owner occupied	7,378,586				7,589,082
	Municipal	448,643				494,183
	Total commercial	20,106,831				19,762,723
	Commercial real estate:
	Construction and land development	2,240,295				1,939,413
	Term	7,928,540				8,062,819
	Total commercial real estate	10,168,835				10,002,232
	Consumer:
	Home equity credit line	2,124,328				2,177,680
	1-4 family residential	4,636,895				4,350,329
	Construction and other consumer real estate	321,436				321,235
	Bankcard and other revolving plans	331,966				306,428
	Other	207,578				216,379
	Total consumer	7,622,203				7,372,051
	FDIC-supported loans	374,861				528,241
	Total loans	$	38,272,730			$	37,665,247
	FDIC-supported loans were acquired during 2009 and are indemnified by the Federal Deposit Insurance Corporation (“FDIC”) under loss sharing agreements. The FDIC-supported loan balances presented in the accompanying schedules include purchased credit-impaired 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 $132.4 million at September 30, 2013 and $137.5 million at December 31, 2012.
	Owner occupied and commercial real estate loans include unamortized premiums of approximately $49.9 million at September 30, 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 $22.4 billion at September 30, 2013 and $21.1 billion at December 31, 2012 have been pledged at the Federal Reserve and various Federal Home Loan Banks as collateral for current and potential borrowings.
	We sold loans totaling $421 million and $1,315 million for the three and nine months ended September 30, 2013 and $369 million and $1,244 million for the three and nine months ended September 30, 2012, respectively, that were previously classified as loans held for sale. At the time of origination, we determine whether loans will be held for investment or held for sale. We may subsequently change our original intent to hold loans for investment and reclassify them as held for sale. Loans classified as loans held for sale primarily consist of conforming residential mortgages. Amounts added to loans held for sale during these periods were $374 million and $1,152 million for the three and nine months ended September 30, 2013 and $452 million and $1,260 million for the three and nine months ended September 30, 2012, respectively. Income from loans sold, excluding servicing, was $5 million and $22 million for the three and nine months ended September 30, 2013 and $8 million and $22 million for the three and nine months ended September 30, 2012, respectively.
	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 consumer 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 commercial real estate (“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
	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, including 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. 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 allowance for credit losses are summarized as follows:
		Three Months Ended September 30, 2013
	(In thousands)	Commercial				Commercial				Consumer			FDIC-				Total
						real estate							supported 1
	Allowance for loan losses:
	Balance at beginning of period	$	486,353			$	251,278			$	70,366		$	5,915			$	813,912
	Additions:
	Provision for loan losses	(1,768		)		(4,520		)		569			146				(5,573		)
	Adjustment for FDIC-supported loans	—				—				—			(2,118		)		(2,118		)
	Deductions:
Gross loan and lease charge-offs	(11,465		)		(5,738		)		(5,535		)	(88		)		(22,826		)
Recoveries	6,155				2,988				3,109			1,876				14,128
Net loan and lease charge-offs	(5,310		)		(2,750		)		(2,426		)	1,788				(8,698		)
Balance at end of period	$	479,275			$	244,008			$	68,509		$	5,731			$	797,523
Reserve for unfunded lending commitments:
Balance at beginning of period	$	63,272			$	39,454			$	1,356		$	—			$	104,082
Provision charged (credited) to earnings	(16,133		)		(6,010		)		2,208			—				(19,935		)
Balance at end of period	$	47,139			$	33,444			$	3,564		$	—			$	84,147
Total allowance for credit losses at end of period:
Allowance for loan losses	$	479,275			$	244,008			$	68,509		$	5,731			$	797,523
Reserve for unfunded lending commitments	47,139				33,444				3,564			—				84,147
Total allowance for credit losses	$	526,414			$	277,452			$	72,073		$	5,731			$	881,670
	Nine Months Ended September 30, 2013
(In thousands)	Commercial				Commercial				Consumer			FDIC-				Total
					real estate							supported 1
Allowance for loan losses:
Balance at beginning of period	$	510,908			$	276,976			$	95,656		$	12,547			$	896,087
Additions:
Provision for loan losses	(10,179		)		(34,370		)		(12,725		)	676				(56,598		)
Adjustment for FDIC-supported loans	—				—				—			(9,756		)		(9,756		)
Deductions:
Gross loan and lease charge-offs	(48,073		)		(19,069		)		(24,574		)	(1,676		)		(93,392		)
Recoveries	26,619				20,471				10,152			3,940				61,182
Net loan and lease charge-offs	(21,454		)		1,402				(14,422		)	2,264				(32,210		)
Balance at end of period	$	479,275			$	244,008			$	68,509		$	5,731			$	797,523
Reserve for unfunded lending commitments:
Balance at beginning of period	$	67,374			$	37,852			$	1,583		$	—			$	106,809
Provision charged (credited) to earnings	(20,235		)		(4,408		)		1,981			—				(22,662		)
Balance at end of period	$	47,139			$	33,444			$	3,564		$	—			$	84,147
Total allowance for credit losses at end of period:
Allowance for loan losses	$	479,275			$	244,008			$	68,509		$	5,731			$	797,523
Reserve for unfunded lending commitments	47,139				33,444				3,564			—				84,147
Total allowance for credit losses	$	526,414			$	277,452			$	72,073		$	5,731			$	881,670
	Three Months Ended September 30, 2012
(In thousands)	Commercial				Commercial				Consumer			FDIC-				Total
					real estate							supported 1
Allowance for loan losses:
Balance at beginning of period	$	542,170			$	307,965			$	102,391		$	20,917			$	973,443
Additions:
Provision for loan losses	(4,324		)		2,157				3,351			(3,073		)		(1,889		)
Adjustment for FDIC-supported loans	—				—				—			(5,908		)		(5,908		)
Deductions:
Gross loan and lease charge-offs	(26,424		)		(20,264		)		(11,391		)	(702		)		(58,781		)
Recoveries	12,013				3,312				3,262			1,616				20,203
Net loan and lease charge-offs	(14,411		)		(16,952		)		(8,129		)	914				(38,578		)
Balance at end of period	$	523,435			$	293,170			$	97,613		$	12,850			$	927,068
Reserve for unfunded lending commitments:
Balance at beginning of period	$	70,553			$	31,663			$	1,370		$	—			$	103,586
Provision charged (credited) to earnings	542				1,741				(19		)	—				2,264
Balance at end of period	$	71,095			$	33,404			$	1,351		$	—			$	105,850
Total allowance for credit losses at end of period:
Allowance for loan losses	$	523,435			$	293,170			$	97,613		$	12,850			$	927,068
Reserve for unfunded lending commitments	71,095				33,404				1,351			—				105,850
Total allowance for credit losses	$	594,530			$	326,574			$	98,964		$	12,850			$	1,032,918
	Nine Months Ended September 30, 2012
(In thousands)	Commercial			Commercial			Consumer			FDIC-		Total
				real estate						supported 1
Allowance for loan losses:
Balance at beginning of period	561,351			343,747			123,115			23,472		1,051,685
Additions:
Provision for loan losses	20,859			(2,769	)		9,989			(3,451	)	24,628
Adjustment for FDIC-supported loans	—			—			—			(12,821	)	(12,821	)
Deductions:
Gross loan and lease charge-offs	(91,477	)		(70,098	)		(45,722	)		(5,183	)	(212,480	)
Recoveries	32,702			22,290			10,231			10,833		76,056
Net loan and lease charge-offs	(58,775	)		(47,808	)		(35,491	)		5,650		(136,424	)
Balance at end of period	523,435			293,170			97,613			12,850		927,068
Reserve for unfunded lending commitments:
Balance at beginning of period	77,232			23,572			1,618			—		102,422
Provision charged (credited) to earnings	(6,137	)		9,832			(267	)				3,428
Balance at end of period	71,095			33,404			1,351			—		105,850
Total allowance for credit losses at end of period:
Allowance for loan losses	523,435			293,170			97,613			12,850		927,068
Reserve for unfunded lending commitments	71,095			33,404			1,351			—		105,850
Total allowance for credit losses	594,530			326,574			98,964			12,850		1,032,918
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, $83.1 million at September 30, 2012, and $68.2 million at December 31, 2011 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:
	September 30, 2013
(In thousands)	Commercial				Commercial				Consumer			FDIC-				Total
					real estate							supported
Allowance for loan losses:
Individually evaluated for impairment	$	39,950			$	15,117			$	12,189		$	—			$	67,256
Collectively evaluated for impairment	439,325				228,891				56,320			607				725,143
Purchased loans with evidence of credit deterioration	—				—				—			5,124				5,124
Total	$	479,275			$	244,008			$	68,509		$	5,731			$	797,523
Outstanding loan balances:
Individually evaluated for impairment	$	327,999			$	322,996			$	104,308		$	1,051			$	756,354
Collectively evaluated for impairment	19,778,832				9,845,839				7,517,895			40,559				37,183,125
Purchased loans with evidence of credit deterioration	—				—				—			333,251				333,251
Total	$	20,106,831			$	10,168,835			$	7,622,203		$	374,861			$	38,272,730
	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:
(In thousands)	September 30,				December 31,
	2013				2012
Commercial:
Commercial and industrial	$	100,188			$	90,859
Leasing	796				838
Owner occupied	157,609				206,031
Municipal	10,006				9,234
Total commercial	268,599				306,962
Commercial real estate:
Construction and land development	65,320				107,658
Term	60,378				124,615
Total commercial real estate	125,698				232,273
Consumer:
Home equity credit line	8,425				14,247
1-4 family residential	57,658				70,180
Construction and other consumer real estate	4,080				4,560
Bankcard and other revolving plans	1,186				1,190
Other	1,149				1,398
Total consumer loans	72,498				91,575
FDIC-supported loans	4,744				17,343
Total	$	471,539			$	648,153
Past due loans (accruing and nonaccruing) are summarized as follows:
	September 30, 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	$	11,820,258			$	28,268			$	55,951		$	84,219			$	11,904,477		$	2,280	$	44,546
Leasing	374,200				323				602			925				375,125			—		—
Owner occupied	7,289,080				39,538				49,968			89,506				7,378,586			3,106		97,378
Municipal	448,643				—				—			—				448,643			—		10,006
Total commercial	19,932,181				68,129				106,521			174,650				20,106,831			5,386		151,930
Commercial real estate:
Construction and land development	2,200,392				21,609				18,294			39,903				2,240,295			—		28,140
Term	7,885,730				17,940				24,870			42,810				7,928,540			2,361		33,780
Total commercial real estate	10,086,122				39,549				43,164			82,713				10,168,835			2,361		61,920
Consumer:
Home equity credit line	2,116,048				4,357				3,923			8,280				2,124,328			—		3,226
1-4 family residential	4,598,613				13,816				24,466			38,282				4,636,895			551		28,850
Construction and other consumer real estate	317,305				1,574				2,557			4,131				321,436			368		1,738
Bankcard and other revolving plans	329,055				1,951				960			2,911				331,966			669		840
Other	205,798				822				958			1,780				207,578			63		70
Total consumer loans	7,566,819				22,520				32,864			55,384				7,622,203			1,651		34,724
FDIC-supported loans	339,085				11,162				24,614			35,776				374,861			22,450		2,400
Total	$	37,924,207			$	141,360			$	207,163		$	348,523			$	38,272,730		$	31,848	$	250,974
	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 that are 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 and improbable.
We generally assign internal 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 evaluate our credit quality information such as risk grades at least quarterly, or as soon as we identify information that might warrant an upgrade or downgrade. Risk grades are then updated as necessary.
For consumer loans, we generally assign internal risk grades similar to those described previously based on payment performance. These are generally assigned either a Pass or Substandard grade and are reviewed as we identify information that might warrant an upgrade or 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:
	September 30, 2013
(In thousands)	Pass				Special				Sub-			Doubtful				Total			Total
					Mention				standard							loans			allowance
Commercial:
Commercial and industrial	$	11,176,352			$	331,846			$	391,335		$	4,944			$	11,904,477
Leasing	369,152				2,875				3,098			—				375,125
Owner occupied	6,760,607				131,895				484,779			1,305				7,378,586
Municipal	438,637				—				10,006			—				448,643
Total commercial	18,744,748				466,616				889,218			6,249				20,106,831			$	479,275
Commercial real estate:
Construction and land development	2,094,934				15,250				127,875			2,236				2,240,295
Term	7,414,358				213,538				300,644			—				7,928,540
Total commercial real estate	9,509,292				228,788				428,519			2,236				10,168,835			244,008
Consumer:
Home equity credit line	2,105,327				—				19,001			—				2,124,328
1-4 family residential	4,563,611				—				73,284			—				4,636,895
Construction and other consumer real estate	312,046				—				9,390			—				321,436
Bankcard and other revolving plans	329,442				—				2,524			—				331,966
Other	206,174				—				1,404			—				207,578
Total consumer loans	7,516,600				—				105,603			—				7,622,203			68,509
FDIC-supported loans	253,788				20,401				100,672			—				374,861			5,731
Total	$	36,024,428			$	715,805			$	1,524,012		$	8,485			$	38,272,730		$	797,523
	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. Purchased credit impaired (“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 three and nine months ended September 30, 2013 and 2012 was not significant.
Information on impaired loans individually evaluated is summarized as follows, including the average recorded investment and interest income recognized for the three and nine months ended September 30, 2013 and 2012:
	September 30, 2013
(In thousands)	Unpaid				Recorded investment							Total				Related
	principal											recorded				allowance
	balance				with no				with			investment
					allowance				allowance
Commercial:
Commercial and industrial	$	176,337			$	29,242			$	124,439		$	153,681			$	20,670
Owner occupied	166,488				50,883				102,850			153,733				15,668
Total commercial	342,825				80,125				227,289			307,414				36,338
Commercial real estate:
Construction and land development	130,435				48,912				64,479			113,391				3,572
Term	207,519				47,754				134,593			182,347				10,243
Total commercial real estate	337,954				96,666				199,072			295,738				13,815
Consumer:
Home equity credit line	15,056				9,780				2,464			12,244				182
1-4 family residential	101,913				39,774				46,529			86,303				11,778
Construction and other consumer real estate	6,238				3,169				1,603			4,772				229
Other	753				753				—			753				—
Total consumer loans	123,960				53,476				50,596			104,072				12,189
FDIC-supported loans	441,347				121,381				212,921			334,302				5,124
Total	$	1,246,086			$	351,648			$	689,878		$	1,041,526			$	67,466
	December 31, 2012
(In thousands)	Unpaid				Recorded investment							Total				Related
	principal											recorded				allowance
	balance				with no				with			investment
					allowance				allowance
Commercial:
Commercial and industrial	$	176,521			$	27,035			$	119,780		$	146,815			$	12,198
Owner occupied	210,319				79,413				106,282			185,695				17,105
Total commercial	386,840				106,448				226,062			332,510				29,303
Commercial real estate:
Construction and land development	182,385				67,241				85,855			153,096				5,178
Term	310,242				70,718				187,112			257,830				16,725
Total commercial real estate	492,627				137,959				272,967			410,926				21,903
Consumer:
Home equity credit line	14,339				8,055				3,444			11,499				297
1-4 family residential	108,934				42,602				49,867			92,469				12,921
Construction and other consumer real estate	7,054				2,710				3,085			5,795				517
Bankcard and other revolving plans	287				—				287			287				1
Other	2,454				1,832				175			2,007				22
Total consumer loans	133,068				55,199				56,858			112,057				13,758
FDIC-supported loans	895,804				275,187				195,158			470,345				12,125
Total	$	1,908,339			$	574,793			$	751,045		$	1,325,838			$	77,089
	Three Months Ended								Nine Months Ended
	30-Sep-13								30-Sep-13
(In thousands)	Average				Interest				Average			Interest
	recorded				income				recorded			income
	investment				recognized				investment			recognized
Commercial:
Commercial and industrial	$	199,217			$	1,105			$	175,040		$	2,594
Owner occupied	217,439				915				211,225			2,810
Municipal	—				—				—			—
Total commercial	416,656				2,020				386,265			5,404
Commercial real estate:
Construction and land development	135,013				623				139,194			2,754
Term	288,980				1,969				285,307			5,571
Total commercial real estate	423,993				2,592				424,501			8,325
Consumer:
Home equity credit line	14,606				120				12,943			262
1-4 family residential	103,379				457				100,012			1,171
Construction and other consumer real estate	5,501				49				5,767			141
Bankcard and other revolving plans	—				—				—			—
Other	1,751				—				1,784			—
Total consumer loans	125,237				626				120,506			1,574
FDIC-supported loans	363,293				20,004			1	404,826			79,153			1
Total	$	1,329,179			$	25,242			$	1,336,098		$	94,456
	Three Months Ended								Nine Months Ended
	30-Sep-12								30-Sep-12
(In thousands)	Average				Interest				Average			Interest
	recorded				income				recorded			income
	investment				recognized				investment			recognized
Commercial:
Commercial and industrial	$	133,120			$	830			$	128,930		$	2,395
Owner occupied	187,072				558				168,328			1,729
Municipal	3,943				—				1,314			—
Total commercial	324,135				1,388				298,572			4,124
Commercial real estate:
Construction and land development	205,295				1,133				188,064			2,780
Term	288,735				1,723				258,159			5,806
Total commercial real estate	494,030				2,856				446,223			8,586
Consumer:
Home equity credit line	742				3				847			6
1-4 family residential	86,103				431				79,993			1,162
Construction and other consumer real estate	6,764				43				6,641			128
Bankcard and other revolving plans	287				—				128			—
Other	1,972				—				2,320			—
Total consumer loans	95,868				477				89,929			1,296
FDIC-supported loans	94,890				14,055			1	102,709			34,202			1
Total	$	1,008,923			$	18,776			$	937,433		$	48,208
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 that includes the recorded investment on an accruing and nonaccruing basis by loan class and modification type is summarized in the following schedules:
	September 30, 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	$	355			$	15,794			$	—		$	6,856			$	14,326		$	34,928	$	72,259
Owner occupied	22,121				4,768				994			2,961				10,145			19,866		60,855
Total commercial	22,476				20,562				994			9,817				24,471			54,794		133,114
Commercial real estate:
Construction and land development	2,062				11,688				—			1,120				8,836			27,962		51,668
Term	34,482				9,516				5,331			5,766				22,405			58,945		136,445
Total commercial real estate	36,544				21,204				5,331			6,886				31,241			86,907		188,113
Consumer:
Home equity credit line	743				—				8,922			—				325			335		10,325
1-4 family residential	2,649				1,294				7,861			647				4,482			33,613		50,546
Construction and other consumer real estate	133				963				—			—				144			1,455		2,695
Other	—				—				—			—				—			—		—
Total consumer loans	3,525				2,257				16,783			647				4,951			35,403		63,566
Total accruing	62,545				44,023				23,108			17,350				60,663			177,104		384,793
Nonaccruing
Commercial:
Commercial and industrial	2,609				8,958				68			156				1,362			13,416		26,569
Owner occupied	3,096				1,471				1,074			3,823				11,182			12,944		33,590
Total commercial	5,705				10,429				1,142			3,979				12,544			26,360		60,159
Commercial real estate:
Construction and land development	11,822				1,750				—			—				5,591			40,008		59,171
Term	2,480				—				—			2,051				325			9,780		14,636
Total commercial real estate	14,302				1,750				—			2,051				5,916			49,788		73,807
Consumer:
Home equity credit line	—				—				1,575			—				222			130		1,927
1-4 family residential	4,455				1,420				1,787			—				4,440			16,353		28,455
Construction and other consumer real estate	5				926				—			—				—			1,034		1,965
Bankcard and other revolving plans	—				260				—			—				—			—		260
Total consumer loans	4,460				2,606				3,362			—				4,662			17,517		32,607
Total nonaccruing	24,467				14,785				4,504			6,030				23,122			93,665		166,573
Total	$	87,012			$	58,808			$	27,612		$	23,380			$	83,785		$	270,769	$	551,366
	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 September 30, 2013 and $13 million at December 31, 2012.
The total recorded investment of all TDRs in which interest rates were modified below market was $204.9 million at September 30, 2013 and $225.6 million at December 31, 2012. These loans are included in the previous table 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:
(In thousands)	Three Months Ended								Nine Months Ended
	September 30,								September 30,
	2013				2012				2013			2012
Commercial:
Commercial and industrial	$	(107	)		$	(134	)		$	(308	)	$	(157	)
Owner occupied	(1,061		)		(309		)		(3,158		)	(1,012		)
Total commercial	(1,168		)		(443		)		(3,466		)	(1,169		)
Commercial real estate:
Construction and land development	(237		)		(273		)		(755		)	(742		)
Term	(2,134		)		(1,443		)		(7,285		)	(4,469		)
Total commercial real estate	(2,371		)		(1,716		)		(8,040		)	(5,211		)
Consumer:
Home equity credit line	(24		)		(18		)		(97		)	(51		)
1-4 family residential	(3,700		)		(4,204		)		(11,313		)	(12,045		)
Construction and other consumer real estate	(106		)		(230		)		(324		)	(445		)
Total consumer loans	(3,830		)		(4,452		)		(11,734		)	(12,541		)
Total decrease to interest income1	$	(7,369	)		$	(6,611	)		$	(23,240	)	$	(18,921	)
1Calculated 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.
The recorded investment of accruing and nonaccruing TDRs that had a payment default during the period listed below (and are still in default at period-end) and are within 12 months or less of being modified as TDRs is as follows:
	Three Months Ended											Nine Months Ended
	30-Sep-13											30-Sep-13
(In thousands)	Accruing				Nonaccruing				Total			Accruing				Nonaccruing			Total
Commercial:
Commercial and industrial	$	—			$	660			$	660		$	—			$	660		$	660
Owner occupied	—				—				—			—				511			511
Total commercial	—				660				660			—				1,171			1,171
Commercial real estate:
Construction and land development	—				—				—			—				—			—
Term	—				—				—			—				—			—
Total commercial real estate	—				—				—			—				—			—
Consumer:
Home equity credit line	—				222				222			—				307			307
1-4 family residential	—				—				—			—				1,372			1,372
Total consumer loans	—				222				222			—				1,679			1,679
Total	$	—			$	882			$	882		$	—			$	2,850		$	2,850
	Three Months Ended											Nine Months Ended
	30-Sep-12											30-Sep-12
(In thousands)	Accruing				Nonaccruing				Total			Accruing				Nonaccruing			Total
Commercial:
Commercial and industrial	$	—			$	107			$	107		$	—			$	1,441		$	1,441
Owner occupied	—				—				—			—				5,405			5,405
Total commercial	—				107				107			—				6,846			6,846
Commercial real estate:
Construction and land development	—				2,229				2,229			—				2,525			2,525
Term	—				—				—			—				—			—
Total commercial real estate	—				2,229				2,229			—				2,525			2,525
Consumer:
Home equity credit line									—										—
1-4 family residential	—				—				—			—				1,089			1,089
Total consumer loans	—				—				—			—				1,089			1,089
Total	$	—			$	2,336			$	2,336		$	—			$	10,460		$	10,460
Note: Total loans modified as TDRs during the 12 months previous to September 30, 2013 and 2012 were $178.8 million and $164.6 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 September 30, 2013 concluded that no significant exposure exists from such credit risk concentrations. See Note 6 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. 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:
(In thousands)	September 30,				December 31,
	2013				2012
Commercial	$	164,760			$	227,414
Commercial real estate	254,507				382,068
Consumer	31,675				41,398
Outstanding balance	$	450,942			$	650,880
Carrying amount	$	334,473			$	472,040
ALLL	5,077				12,077
Carrying amount, net	$	329,396			$	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 approximately $0.1 million at September 30, 2013 and $12.2 million at December 31, 2012.
Changes in the accretable yield for PCI loans were as follows:
(In thousands)	Three Months Ended								Nine Months Ended
	September 30,								September 30,
	2013				2012				2013			2012
Balance at beginning of period	$	104,483			$	157,040			$	134,461		$	184,679
Accretion	(19,941		)		(25,409		)		(78,994		)	(69,824		)
Reclassification from nonaccretable difference	7,908				9,565				31,092			25,112
Disposals and other	3,308				3,550				9,199			4,779
Balance at end of period	$	95,758			$	144,746			$	95,758		$	144,746
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 for acquired loans 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 the three and nine months ended September 30, we adjusted the ALLL for acquired loans by recording a provision for loan losses of $(2.0) million and $(9.1) million in 2013 and $(9.0) million and $(16.3) million in 2012, respectively. The provision is net of the ALLL reversals discussed subsequently. As separately discussed and in accordance with the loss sharing agreements, portions of the increases to the provision are recoverable from the FDIC and comprise part of the FDIC IA. For the three and nine months ended September 30, these adjustments, before FDIC indemnification, resulted in net recoveries of $1.9 million and $2.5 million in 2013, and $1.4 million and $8.1 million in 2012, respectively.
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 the three and nine months ended September 30, total reversals to the ALLL were $2.3 million and $13.2 million in 2013 and $8.3 million and $18.9 million in 2012, respectively. 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) efforts by our credit officers and loan workout professionals to resolve problem loans.
For the three and nine months ended September 30, the impact of increased cash flow estimates recognized in the statement of income for acquired loans with no ALLL was approximately $15.0 million and $62.4 million in 2013 and $17.6 million and $45.5 million in 2012, respectively, of additional interest income; and $13.0 million and $55.1 million in 2013 and $14.4 million and $35.6 million in 2012, respectively, of additional other noninterest expense due to the reduction of the FDIC IA.
FDIC Indemnification Asset
In October 2012, the FASB issued ASU 2012-06, Subsequent Accounting for an Indemnification Asset Recognized at the Acquisition Date as a Result of a Government-Assisted Acquisition of a Financial Institution, a consensus of the FASB Emerging Issues Task Force. This new guidance under ASC 805, Business Combinations, provides that a change in measurement of the IA due to a change in expected cash flows would be accounted for on the same basis as the change in the indemnified loans. Any amortization period for the changes in value would be limited to the lesser of the term of the indemnification agreement or the remaining life of the indemnified loans. Our existing accounting was substantially similar to this new guidance, and our adoption effective January 1, 2013 did not have a significant impact on our financial position or results of operations.
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.
Changes in the FDIC IA were as follows:
(In thousands)	Three Months Ended								Nine Months Ended
	September 30,								September 30,
	2013				2012				2013			2012
Balance at beginning of period	$	51,297			$	117,167			$	90,929		$	133,810
Amounts filed with the FDIC and collected or in process 1	5,507				3,904				15,267			15,106
Net change in asset balance due to reestimation of projected cash flows 2	(15,033		)		(20,165		)		(64,425		)	(48,010		)
Balance at end of period	$	41,771			$	100,906			$	41,771		$	100,906
1	The FDIC’s reimbursement process requires that submitted expenses be paid, not just incurred, to qualify for reimbursement.
2	Negative amounts result from the accretion of loan balances based on increases in cash flow estimates and on prepayments.
Any changes to 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	9 Months Ended
	Sep. 30, 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 9 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 future cash flows, or other types of forecasted transactions, are considered cash flow hedges. Derivatives used to manage the exposure to credit risk, which can include total return swaps, are considered credit derivatives. When put in place after purchase of the assets 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, the effective portion of 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 periods, 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 to earnings, as discussed subsequently.
	For derivatives designated as cash flow hedges, the effective portion of changes in the fair value of the derivative is 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 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 at a given balance sheet date. 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 September 30, 2013, the fair value of our derivative liabilities was $59.9 million, for which we have pledged cash collateral of approximately $48.3 million in the normal course of business. If our credit rating were downgraded by one notch at September 30, 2013, the additional amount of collateral we could be required to pledge is approximately $2 million.
	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 September 30, 2013 and December 31, 2012, and the related gain (loss) of derivative instruments for the three and nine months ended September 30, 2013 and 2012 is summarized as follows:
		September 30, 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
	Asset derivatives
	Cash flow hedges:
	Interest rate swaps	$	75,000	$	411	$	—		$	150,000	$	1,188	$	—
	Total derivatives designated as hedging instruments	75,000		411		—			150,000		1,188		—
	Derivatives not designated as hedging instruments
	Interest rate swaps	65,850		517		565			98,524		1,043		1,047
	Interest rate swaps for customers 2	2,728,601		54,640		55,110			2,607,603		79,579		82,926
	Total return swap	1,159,686		—		4,239			1,159,686		—		5,127
	Total derivatives not designated as hedging instruments	3,954,137		55,157		59,914			3,865,813		80,622		89,100
	Total derivatives	$	4,029,137	$	55,568	$	59,914		$	4,015,813	$	81,810	$	89,100
		Three Months Ended September 30, 2013									Nine Months Ended September 30, 2013
		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 3									income 3
	Derivatives designated as hedging instruments
	Asset derivatives
	Cash flow hedges 1:
	Interest rate swaps	$	414	$	97	$	—				$	408	$	2,479	$	—
		414		97		—					408		2,479		—
	Liability derivatives
	Fair value hedges:
	Terminated swaps on long-term debt								$	796								$	2,342
	Total derivatives designated as hedging instruments	414		97		—			796		408		2,479		—			2,342
	Derivatives not designated as hedging instruments
	Interest rate swaps					765									678
	Interest rate swaps for customers 2					883									6,631
	Futures contracts					2									2
	Total return swap					(5,342		)							(16,350		)
	Total derivatives not designated as hedging instruments					(3,692		)							(9,039		)
	Total derivatives	$	414	$	97	$	(3,692	)	$	796	$	408	$	2,479	$	(9,039	)	$	2,342
		Three Months Ended September 30, 2012									Nine Months Ended September 30, 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 3									income 3
	Derivatives designated as hedging instruments
	Asset derivatives
	Cash flow hedges 1:
	Interest rate swaps	$	84	$	2,378	$	—				$	390	$	10,871	$	—
		84		2,378		—					390		10,871		—
	Liability derivatives
	Fair value hedges:
	Terminated swaps on long-term debt								$	771								2,277
	Total derivatives designated as hedging instruments	84		2,378		—			771		390		10,871		—			2,277
Derivatives not designated as hedging instruments
Interest rate swaps					(174		)							(302		)
Interest rate swaps for customers 2					1,331									1,917
Basis swaps					—									18
Futures contracts					(2		)							(12		)
Total return swap					(5,403		)							(16,303		)
Total derivatives not designated as hedging instruments					(4,248		)							(14,682		)
Total derivatives	$	84	$	2,378	$	(4,248	)	$	771	$	390	$	10,871	$	(14,682	)	$	2,277
Note: These tables 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 accumulated OCI (“AOCI”) represent the effective portion of the derivative gain (loss).
2	Amounts include both the customer swaps and the offsetting derivative contracts.
3 Amounts for the three and nine months ended September 30 of $0.1 million and $2.5 million in 2013, and $2.4 million and $10.9 million in 2012, respectively, are the amounts of reclassification to earnings from AOCI presented in Note 7.
At September 30, the fair values of derivative assets and liabilities were reduced by net credit valuation adjustments of $2.4 million and $2.0 million in 2013, and $5.2 million and $0.1 million in 2012, respectively. These adjustments are required to reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk.
We offer interest rate swaps to our customers to assist them in managing their exposure to fluctuating interest rates. Upon issuance, all of these customer swaps are immediately “hedged” by offsetting derivative contracts with major dealers, 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.
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 corresponding 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. At September 30, 2013, amounts to be reclassified were not material.
Total Return Swap
On July 28, 2010, we entered into a total return swap and related interest rate swaps (“TRS”) 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 $4.2 million at September 30, 2013 and $5.1 million at December 31, 2012.
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. We are able to cancel the transaction with not longer than 90 days’ notice. Absent major changes in these projected cash flows, we expect the value of the TRS liability to continue to approximate its September 30, 2013 fair value. We expect to incur subsequent net quarterly costs of approximately $5.5 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 September 30, 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.

Debt_And_Shareholders_Equity

Debt And Shareholders' Equity	9 Months Ended
	Sep. 30, 2013
Capitalization, Long-term Debt and Equity [Abstract]	'
Debt And Shareholders' Equity	'
	DEBT AND SHAREHOLDERS’ EQUITY
	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. Amounts raised from the preferred stock issuances listed subsequently were used to fund this redemption. The Federal Reserve did not object to the element of our capital plan, as of the latest modification on May 6, 2013, 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 of the Series C preferred stock, with the difference from the par amount, or $126 million, relating 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 in June 2009 to convertible subordinated debt. 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 had 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. Amounts transferred became part of the carrying value of the preferred stock. The $126 million portion of the redemption was recorded as a preferred stock redemption in the statement of income for the three and nine months ended September 30, 2013.
	At September 30, 2013, the remaining balance in common stock of the BCF was approximately $77 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. At September 30, 2013, the balance at par of the convertible subordinated debt was $457 million. The associated debt discount was $113 million at September 30, 2013.
	Preferred Stock Issuances
	The following series of noncumulative perpetual preferred stock were issued during the nine months ended September 30, 2013 for a total of $800 million. Net of commissions and fees, the proceeds added approximately $784 million to shareholders’ equity. The shares qualify as Tier 1 capital and liquidation preference is at $1,000 per share. The shares were registered with the SEC and issuances were in the form of depositary shares.
	1	Series J, $195 million (195,152 shares), fixed/floating rate issued August 11, 2013; dividends payable semiannually at 7.20% on the 15th day of March and September commencing March 15, 2014 to the earliest possible redemption date of September 15, 2023, interest rate then resets to an annual floating rate equal to three-month LIBOR plus 4.44%.
	2	Series A, $6 million (5,907 shares), floating rate reopened August 2, 2013; dividends payable quarterly at the greater of three-month LIBOR plus 0.52%, or 4.0%.
	3	Series I, $301 million (300,893 shares), fixed/floating rate issued May 17, 2013; dividends payable semiannually at 5.80% on the 15th day of June and December commencing December 15, 2013 to the earliest possible redemption date of June 15, 2023, interest rate then resets to an annual floating rate equal to three-month LIBOR plus 3.80% and dividends become payable quarterly.
	4	Series H, $126 million (126,221 shares), fixed rate issued May 3, 2013; dividends payable quarterly at 5.75% on the 15th day of March, June, September, and December, commencing June 15, 2013; redeemable beginning June 15, 2019.
	5	Series G, $172 million (171,827 shares), fixed/floating rate issued February 7, 2013; dividends payable quarterly at 6.30% on the 15th day of March, June, September, and December commencing June 15, 2013 to the earliest possible redemption date of March 15, 2023, interest rate then resets to an annual floating rate equal to three-month LIBOR plus 4.24%.
	These preferred stock issuances, as with our existing preferred stock, are subject to federal regulations pertaining to the payment of dividends, redemptions, and other items.
	Debt Issuances and Redemptions
	During the three and nine months ended September 30, 2013 under our senior medium-term note program, we issued notes totaling $29 million and $97 million, respectively, and during the nine months ended September 30, 2013, we redeemed at maturity all of the remaining $5 million of short-term notes and $18 million of long-term notes. At September 30, 2013, the outstanding notes in this program had interest rates from 2.55% to 5.50% and maturities through November 2019.
	On September 12, 2013, we issued $88 million of fixed/floating rate subordinated notes due September 15, 2028. Quarterly interest payments commence December 15, 2013 at 6.95% to the earliest possible redemption date of September 15, 2023, after which the interest rate changes to an annual floating rate equal to three-month LIBOR plus 3.89%. Net proceeds were approximately $86 million.
	On June 13, 2013, we issued $300 million of 4.5% senior notes due June 13, 2023, with semiannual interest payments commencing December 13, 2013. Net proceeds were approximately $297 million.
	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. Following our tender offer announced on May 31, 2013, we repurchased on June 18, 2013 approximately $258 million of our $500 million outstanding 7.75% senior notes that were due September 23, 2014. In connection with these debt redemptions, we recorded $40.3 million of debt extinguishment cost during the nine months ended September 30, 2013 that consisted of $22.9 million of the early tender premium and $17.4 million in write-offs of unamortized debt discount and issuance costs.
	Subordinated Debt Conversions
	Prior to the third quarter of 2013, approximately $1.2 million of convertible subordinated debt was converted into depositary shares each representing a 1/40th interest in a share of the Company’s preferred stock. These conversions added 1,210 shares of Series C to the Company’s preferred stock.
	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 comparable periods for 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
	Nine Months Ended September 30, 2013
	Balance at December 31, 2012			$	(397,616	)				$	1,794			$	(50,335	)	$	(446,157	)
	Other comprehensive income before reclassifications, net of tax			48,992						236				—			49,228
	Amounts reclassified from AOCI, net of tax			13,909						(1,483		)		—			12,426
	Other comprehensive income (loss)			62,901						(1,247		)		—			61,654
	Balance at September 30, 2013			$	(334,715	)				$	547			$	(50,335	)	$	(384,503	)
	Nine Months Ended September 30, 2012
	Balance at December 31, 2011			$	(546,763	)				$	9,404			$	(54,725	)	$	(592,084	)
	Other comprehensive income before reclassifications, net of tax			56,523						225				—			56,748
	Amounts reclassified from AOCI, net of tax			7,152						(6,554		)		—			598
	Other comprehensive income (loss)			63,675						(6,329		)		—			57,346
	Balance at September 30, 2012			$	(483,088	)				$	3,075			$	(54,725	)	$	(534,738	)
			Amounts reclassified from AOCI 1														Statement of income (SI) Balance sheet
	(In thousands)		Three Months Ended September 30,								Nine Months Ended September 30,						(BS)
	Details about AOCI components		2013				2012				2013			2012					Affected line item
	Net realized gains on investment securities		$	1,580			$	3,046			$	3,726		$	9,285		SI		Fixed income securities gains, net
	Income tax expense		604				1,165				1,425			3,417
			976				1,881				2,301			5,868
	Net unrealized losses on investment		(9,067		)		(2,736		)		(22,999		)	(19,912		)	SI		Net impairment losses on investment securities
	securities
	Income tax benefit		(3,479		)		(1,046		)		(8,863		)	(7,616		)
			(5,588		)		(1,690		)		(14,136		)	(12,296		)
	Accretion of securities with noncredit-related impairment losses not expected to be sold		(496		)		(315		)		(1,477		)	(1,196		)	BS		Investment securities, held-to-maturity
	Deferred income taxes		(211		)		123				(597		)	472			BS		Other assets
			$	(5,319	)		$	(1	)		$	(13,909	)	$	(7,152	)
	Net unrealized gains on derivative instruments		$	97			$	2,378			$	2,479		$	10,871		SI		Interest and fees on loans
	Income tax expense		40				957				996			4,317
			$	57			$	1,421			$	1,483		$	6,554
	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.
	Noncontrolling Interests
	On June 3, 2013, we removed the entire noncontrolling interest amount of approximately $4.8 million from the Company’s balance sheet following settlement with the remaining owner.
	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.
	Subsequent Events
	On October 31, 2013, we issued $162 million of fixed/floating rate subordinated notes due November 15, 2023. Semiannual interest payments commence May 15, 2014 at 5.65% to the earliest possible redemption date of November 15, 2018, after which they are payable quarterly at an annual floating rate equal to three-month LIBOR plus 4.19%. Net proceeds were approximately $160 million.
	On November 6, 2013 we announced the commencement of separate cash tender offers to purchase up to an aggregate of $250 million par amount of our 5.5% and 6.0% convertible and nonconvertible subordinated notes. Purchase amounts for each debt instrument are according to a previously announced schedule. The offers expire at midnight ET on December 5, 2013.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
		INCOME TAXES
	The balance of net deferred tax assets was approximately $367 million at September 30, 2013 and $406 million at December 31, 2012. We evaluate net deferred tax assets on a regular basis to determine whether an additional valuation allowance is required. 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 September 30, 2013.
	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.

Fair_Value

Fair Value	9 Months Ended
	Sep. 30, 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; includes U.S. Treasury and other U.S. Government and agency securities actively traded in over-the-counter markets; mutual funds and stock; securities sold, not yet purchased; and certain derivatives.
	Level 2 – Observable inputs other than Level 1 including quoted prices for similar assets or liabilities, quoted prices in less active markets, or other observable inputs that can be corroborated by observable market data; also includes derivative contracts whose value is determined using a pricing model with observable market inputs or can be derived principally from or corroborated by observable market data. This category generally includes U.S. Government and agency securities; municipal securities; CDO securities; mutual funds and stock; bank-owned life insurance; private equity investments; securities sold, not yet purchased; and derivatives.
	Level 3 – Unobservable inputs supported by little or no market activity for financial instruments whose value is determined using 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; also includes observable inputs for nonbinding single dealer quotes not corroborated by observable market data. This category generally includes municipal securities; private equity investments; most CDO securities; and the total return swap.
	We use fair value to measure certain assets and liabilities on a recurring basis when fair value is the primary measure for accounting. This is done primarily for AFS and trading investment securities; bank-owned life insurance; private equity investments under the equity method of accounting; securities sold, not yet purchased; and derivatives. Fair value is used on a nonrecurring basis to measure certain assets when applying lower of cost or fair value accounting or when adjusting carrying values of certain assets or liabilities, including recognition of impairment on assets. This is done primarily for HTM securities; loans held for sale; impaired loans; other real estate owned (“OREO”); private equity investments carried at cost; goodwill; core deposit and other intangibles; other long-lived assets; and for disclosures of certain financial instruments. ASC 820 presupposes an orderly transaction and precludes the use of blockage factors or liquidity adjustments due to the quantity of securities held by an entity.
	Level 3 Valuation Policies and Procedures
	Our valuation policies and procedures for Level 3 securities are under the direction of the Securities Valuation and Securitization Oversight Committee (“SOC”) comprised of senior and executive members of management in our investment, financial and accounting operations. The SOC is chaired by our chief financial officer and reports to the Audit Committee of the Board of Directors. The major function of the SOC is to develop, review, and approve for use on a quarterly basis the key model inputs, critical valuation assumptions, and proposed discount rates utilized for the valuation of Level 3 securities. The sources of fair value changes are presented to the SOC and attribution analysis are completed when significant changes occur between quarters. SOC procedures require that back testing of certain significant assumptions be provided quarterly. Observers from Risk Management, Internal Audit and other areas attend SOC meetings.
	The Model Risk Management Group (“MRMG”) is responsible for model validation and related policies. The MRMG is separate from the SOC and is part of the Corporate Risk Management Department. The MRMG conducts model validations, including the trust preferred CDO internal model discussed subsequently, and sets policies and procedures for revalidation, which would include revalidation timing.
	Utilization of Third Party Service Providers
	We use third party service providers and third party model outputs to estimate fair value for certain of our AFS securities as follows:
	For AFS Level 2 securities, we use a third party pricing service to provide pricing, if available, for securities in the following reporting categories: U.S. Treasury, agencies and corporations (except Federal Agricultural Mortgage Corporation (“FAMC”) securities); municipal securities; trust preferred – banks and insurance; and other (including ABS CDOs). At September 30, 2013, the fair value of AFS Level 2 securities for which we obtained pricing from the third party pricing service in these reporting categories amounted to approximately $1.9 billion of the $2.0 billion total of AFS Level 2 securities.
	For AFS Level 3 securities, we use other third party service providers to provide pricing, if available, for securities in the following reporting categories: municipal securities, trust preferred – banks and insurance, trust preferred – real estate investment trusts, auction rate, and other (including ABS CDOs). At September 30, 2013, the fair value of AFS Level 3 securities for which we obtained pricing from these third party service providers in these reporting categories amounted to approximately $81 million of the $1.1 billion total of AFS Level 3 securities. In addition, the fair values for approximately $1.0 billion at September 30, 2013 of our AFS Level 3 securities, while internally modeled, include information from third party models. See “Trust preferred CDO internal model” discussed subsequently.
	Fair values of the remaining AFS Level 2 and Level 3 securities not valued by pricing from third party services were determined by us using market corroborative data. At September 30, 2013, the Level 2 securities for which we use market corroborative data consisted of approximately $108 million of FAMC securities, $52 million of municipal securities, and $6 million of mutual funds and stock, while there were no Level 3 securities for which we use market corroborative data. Estimation of the fair values of the FAMC securities included the use of a standard mortgage pass-through calculator that incorporates discounted cash flows, while the municipal securities included the use of a standard form discounted cash flow model with certain inputs adjusted for market conditions.
	For AFS Level 2 securities, the third party pricing service provides documentation on an ongoing basis that includes, among other things, pricing information with respect to reference data, methodology, inputs summarized by asset class, pricing application, corroborative information, etc. The documentation includes benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications. Also included are data from the vendor trading platform. We review, test and validate this information as appropriate.
	For AFS Level 3 securities, SOC procedures call for quarterly comparisons of relevant data assumptions used in the models of the other third party service providers. We evaluate these assumptions for reasonableness and compare them with those used in our internal models. These assumptions include, but are not limited to, discount rates, PDs, loss-given-default rates, over-collateralization levels, and rating transition probability matrices from rating agencies. We also compare the model results and valuations with our information about market trends and trading data. This includes information regarding trading prices, implied discounts, outlier information, valuation assumptions, etc.
	Because of the timeliness of our involvement, the ongoing exchange of market information, and our agreement on input assumptions, we do not adjust prices from our third party service providers. The procedures discussed previously help ensure that the fair value information received was determined in accordance with applicable accounting guidance.
	Available-for-Sale and Trading
	AFS and trading investment securities are fair valued under Level 1 using quoted market prices when available for identical securities. When quoted prices are not available, fair values are determined under Level 2 using quoted prices for similar securities or independent pricing services that incorporate observable market data. The largest portion of Level 3 AFS securities include certain CDOs backed by trust preferred securities issued by banks and insurance companies and, to a lesser extent, by REITs.
	U.S. Treasury, Agencies and Corporations
	Valuation inputs under Level 2 utilized by the third party service provider are discussed previously.
	Municipal Securities
	Valuation inputs under Level 2 utilized by the third party service provider are discussed previously. We may also include reported trades and material event notices from the Municipal Securities Rulemaking Board, plus new issue data. Municipal securities under Level 3 are fair valued similar to the auction rate securities.
	Trust Preferred Collateralized Debt Obligations
	Substantially all of the CDO portfolio is fair valued using an income-based cash flow modeling approach incorporating several methodologies that primarily include internal and third party models.
	Trust preferred CDO internal model: A licensed third party cash flow model, which requires the Company to input its own key valuation assumptions, is used to estimate fair values of bank and insurance trust preferred CDOs. We utilize a statistical regression of quarterly regulatory ratios that we have identified as predictive of future bank failures to create a credit-specific PD for each bank issuer. Effective September 30, 2013, the regression variables and formula were updated and macro-economic variables were added. The inputs are updated quarterly to include the most recent available financial ratios and macro-economic data. This regression formula will continue to be updated periodically to utilize information that best predicted bank failures and bank holding company defaults during this credit cycle (“ratio-based approach”). Our ratio-based approach, while generally referencing trailing quarter regulatory data and ratios, seeks to incorporate the most recent available information.
	Approximately 32% of the bank issuers are public companies included in a third party proprietary reduced form model. The model generates PDs using equity valuation-related inputs along with other macro and issuer-specific inputs. We use the higher of the PD from the third party proprietary reduced form model and the ratio-based approach.
	For performing collateral, we use a floor PD of 30 basis points (“bps”) for year one for collateral where the higher of the one-year PDs from our ratio based approach and those from the third party proprietary reduced form model would be lower. The short-term 30 bps PD is similar to the PD we would apply if we had direct lending exposures to CDO pool collateral. We use a floor PD of 48 bps each year from years two to five smoothing the step-up to reach a 65 bps minimum PD for year six. We utilize a minimum PD for years six to maturity of 65 bps for bank collateral.
	For deferring collateral, effective September 30, 2013, our ratio based approach includes a “time in deferral” variable. We have a full five years of deferral observations for the earliest issuers whose allowable 20 quarter deferral period started in 2008. Using this transition data, the model assessed higher PDs as issuers near the end of their allowable deferral period. The December 31, 2012 PD overlay model for deferrals is therefore no longer used.
	The five-year PDs at September 30, 2013 ranged from 100% for the “worst” deferring banks to 2.18% for the “best” deferring banks. The weighted average assumed loss rate on deferring collateral was 66%. Had we used the December 31, 2012 PD overlay model for deferrals at September 30, 2013, the weighted average loss rate on deferring collateral would have been 55%. This loss rate is calculated as a percentage of the par amount of deferring collateral within a pool that is expected to default prior to the end of a five-year deferral period. The 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 expected loss for the individual pieces of underlying collateral are aggregated to arrive at a pool-level expected 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 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. We discount the credit-adjusted cash flow 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, which include market illiquidity, 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 and projected PDs on the underlying issuers as well as observed trades in our CDO tranches 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 single transaction in each of several of our original AAA-rated tranches and several of our original A-rated tranches. The effective yields on the securities are then used to determine a relationship between the effective yield and expected loss. Expected loss for this purpose is a measure of the variability of cash flows from the mean estimate of cash flow across all Monte Carlo simulations. This relationship is then considered along with other third party or market data in order to identify appropriate discount rates to be applied to the CDOs.
	Our September 30, 2013, valuations for bank and insurance tranches utilized a discount rate range of LIBOR + 3.75% for the highest quality/most over-collateralized insurance-only tranches and LIBOR + 19.2% for the lowest credit quality tranche, which included bank collateral, in order to reflect market level assumptions for structured finance securities. For tranches that include bank collateral, the discount rate was at least LIBOR + 5.7% for the highest quality/most over-collateralized tranches. These discount rates are applied to already credit-adjusted cash flows for each tranche.
	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). The high end of the discount rate spectrum was applied to tranches in which minor changes in default assumption timing produced substantial deterioration in tranche cash flows. These discount rates are applied to credit-adjusted cash flows, which constitute each tranche’s expected cash flows; discount rates are not applied to a hypothetical contractual cash flow.
	At September 30, 2013, the discount rates utilized for fair value purposes for tranches that include bank collateral were:
	1)LIBOR + 5.7% for all first priority original AAA-rated bonds;
	2)LIBOR + 5.7% to 6.7% and averaged LIBOR + 5.8% for lower priority original AAA-rated bonds;
	3)LIBOR + 6.0% to 14.8% and averaged LIBOR + 9.4% for original A-rated bonds; and
	4)LIBOR + 10.4% to 19.2% and averaged LIBOR + 15.7% for original BBB-rated bonds.
	Accordingly, the wide difference between the effective interest rate used in the determination of the credit component of OTTI and the discount rate on the CDOs used in the determination of fair value results in the unrealized losses. The discount rate used for fair value purposes significantly exceeds the effective interest rate for the CDOs. The differences average approximately 5% for the original AAA-rated CDO tranches, 8% for the original A-rated CDO tranches, and 13% for the original BBB-rated CDO tranches. With the exception of certain of the most senior CDOs, most of the principal payments are not expected prior to the final maturity date, which is generally 2029 or later. High market discount rates and the long maturities of the CDO tranches result in full principal repayment contributing little to CDO tranche fair values.
	REIT and ABS CDOs – third party models: Certain of these CDOs are fair valued by third party services using their proprietary models. See the previous discussion that describes the procedures we employ to evaluate the fair values from third party services for AFS Level 3 securities. Also see the subsequent discussion regarding key model inputs and assumptions.
	Auction Rate Securities
	Our market approach methodology includes various data inputs, including AAA municipal and corporate bond yield curves, credit ratings and leverage of each closed-end fund, and market yields for municipal bonds and commercial paper.
	Bank-Owned Life Insurance
	Bank-owned life insurance is valued on a recurring basis 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
	Management who are familiar with our private equity investments, including investment officers, controllers, etc., review quarterly the financial statements and other information for each investment. The Other Equity Investments Committee, consisting of the chief executive officer, the chief financial officer, and the chief investment officer, review periodically for reasonableness the financial information for these investments. This includes oversight of the review of audited financial statements that are available for nearly all of the underlying investments. The amount of unfunded commitments to these partnerships is disclosed in Note 10. Generally, redemption is available annually.
	Private equity investments valued under Level 2 on a recurring basis are investments in 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 valued under Level 3 on a recurring basis are recorded initially at acquisition cost, which is considered the best indication of fair value unless there have been material subsequent positive or negative developments that justify an adjustment in the fair value estimate. Subsequent adjustments to recorded fair values are based as necessary 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 fair valued according to their classification as either exchange-traded or over-the-counter (“OTC”). Exchange-traded derivatives consist of forward currency exchange contracts that have been fair valued 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 fair valued 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 both our own nonperformance risk and the respective counterparty’s nonperformance risk. These adjustments are determined generally by applying a credit spread for the counterparty or the Company as appropriate to the total expected exposure of the derivative. Amounts disclosed in the following schedules differ from the presentation in Note 6 in that they include the foreign currency exchange contracts. The estimation of fair value of the TRS is discussed in Note 6.
	Securities Sold, Not Yet Purchased
	Securities sold, not yet purchased are fair valued under Level 1 when quoted prices are available for the securities involved. Any of these securities under Level 2 are fair valued similar to trading account investment securities.
	Quantitative Disclosure of Fair Value Measurements
	Assets and liabilities measured at fair value by class on a recurring basis are summarized as follows:
	(In thousands)	September 30, 2013
		Level 1				Level 2			Level 3				Total
	ASSETS
	Investment securities:
	Available-for-sale:
	U.S. Treasury, agencies and corporations	$	38,498			$	1,929,039						$	1,967,537
	Municipal securities					51,649			$	13,520			65,169
	Asset-backed securities:
Trust preferred – banks and insurance								1,001,896				1,001,896
Trust preferred – real estate investment trusts								19,517				19,517
Auction rate								6,625				6,625
Other (including ABS CDOs)					2,567			13,547				16,114
Mutual funds and stock	251,382				5,649							257,031
	289,880				1,988,904			1,055,105				3,333,889
Trading account					38,278							38,278
Other noninterest-bearing investments:
Bank-owned life insurance					464,180							464,180
Private equity					4,992			77,556				82,548
Other assets:
Derivatives:
Interest rate related and other					1,067							1,067
Interest rate swaps for customers					54,640							54,640
Foreign currency exchange contracts	9,887											9,887
	9,887				55,707							65,594
	$	299,767			$	2,552,061		$	1,132,661			$	3,984,489
LIABILITIES
Securities sold, not yet purchased	$	21,183										$	21,183
Other liabilities:
Derivatives:
Interest rate related and other					$	861						861
Interest rate swaps for customers					55,110							55,110
Foreign currency exchange contracts	8,703											8,703
Total return swap								$	4,239			4,239
	8,703				55,971			4,239				68,913
Other								197				197
	$	29,886			$	55,971		$	4,436			$	90,293
(In thousands)	December 31, 2012
	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 stock	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 and liabilities occurred among Levels 1, 2 or 3 for the three and nine months ended September 30, 2013 and 2012.
Key Model Inputs and Assumptions
Key model unobservable input assumptions used to fair value certain asset-backed securities by class under Level 3 include the following at September 30, 2013:
(Dollars in thousands)	Fair value at September 30, 2013				Valuation		Constant default	Loss		Prepayment rate
					approach		rate (“CDR”)	severity
Asset-backed securities:
Trust preferred – predominantly banks	$	857,021			Income		Pool specific 3	100%		Pool specific 7
Trust preferred – predominantly insurance	273,420				Income		Pool specific 4	100%		5% per year
Trust preferred – individual banks	23,002				Market
	1,153,443			1
Trust preferred – real estate investment trusts	19,518				Income		Pool specific 5	60-100%		0% per year
Other (including ABS CDOs)	25,197			2	Income		Collateral specific 6	70-100%		Collateral weighted
										average life
1 Includes $1,001.9 million of AFS securities and $151.5 million of HTM securities.
2 Includes $13.5 million of AFS securities and $11.7 million of HTM securities.
3 CDR ranges: yr 1 – 0.30% to 3.52%; yrs 2-5 – 0.47% to 1.05%; yrs 6 to maturity – 0.59% to 0.67%.
4 CDR ranges: yr 1 – 0.30% to 0.34%; yrs 2-5 – 0.48% to 0.58%; yrs 6 to maturity – 0.50% to 0.54%.
5 CDR ranges: yr 1 – 4.3% to 7.8%; yrs 2-3 – 5.0% to 5.5%; yrs 4-6 – 1.0%; yrs 6 to maturity – 0.50%.
6 These are predominantly ABS CDOs whose collateral is rated. CDR and loss severities are built up from the loan level and vary by collateral ratings, asset class, and vintage.
7 Constant Prepayment Rate (“CPR”) ranges: 7.50% to 21.69% annually until 2016; 2016 to maturity – 3.0% annually.
The fair value of the Level 3 bank and insurance CDO portfolio would generally be adversely affected by significant increases in the 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.
The following presents the percentage of total fair value of predominantly bank trust preferred CDOs by vintage year (origination date) according to original rating:
(Dollars in thousands)
		Fair value at September 30, 2013				Percentage of total fair value								Percentage of total fair value by vintage
Vintage						according to original rating
year						AAA		A			BBB
2001		$	36,497			3.1	%	1.1	%		—	%			4.2	%
2002		200,837				20.8		2.6			—				23.4
2003		326,412				23.2		14.9			0.1				38.2
2004		179,677				8.3		12.7			—				21
2005		15,816				1.1		0.7			—				1.8
2006		60,465				2.9		3.7			0.4				7
2007		37,317				4.4		—			—				4.4
		$	857,021			63.8	%	35.7	%		0.5	%			100	%
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
	Three Months Ended September 30, 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 June 30, 2013	$	13,544			$	1,030,293		$	18,499			$	6,554			$	17,324		$	75,517		$	(4,829	)	$	(289	)
Total net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	10				783			64				1				50
Dividends and other investment income																			306
Fair value and nonhedge derivative loss																						(5,342		)
Equity securities gains, net
Fixed income securities gains, net	2				1,494											10
Net impairment losses on investment securities					(7,787		)	(1,112		)						(168		)
Other noninterest expense																									92
Other comprehensive income	64				(3,934		)	2,067				70				(476		)
Purchases																			2,064
Sales																			(249		)
Redemptions and paydowns	(100		)		(18,954		)									(3,193		)	(82		)	5,932
Balance at September 30, 2013	$	13,520			$	1,001,895		$	19,518			$	6,625			$	13,547		$	77,556		$	(4,239	)	$	(197	)
	Level 3 Instruments
	Nine Months Ended September 30, 2013
(In thousands)	Municipal				Trust			Trust				Auction				Other			Private			Derivatives			Other
	securities				preferred – banks and insurance			preferred – REIT				rate				asset-backed			equity						liabilities
																			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	31				2,395			190				2				64
Dividends and other investment income																			5,455
Fair value and nonhedge derivative loss																						(16,350		)
Equity securities gains, net																			3,739
Fixed income securities gains, net	38				3,530											54
Net impairment losses on investment securities					(21,548		)	(1,282		)						(168		)
Other noninterest expense																									(73		)
Other comprehensive income	986				127,028			4,207				108				4,147
Purchases																			5,905
Sales					(7,015		)												(1,369		)
Redemptions and paydowns	(4,086		)		(51,766		)									(5,710		)	(397		)	17,238
Balance at September 30, 2013	$	13,520			$	1,001,895		$	19,518			$	6,625			$	13,547		$	77,556		$	(4,239	)	$	(197	)
	Level 3 Instruments
	Three Months Ended September 30, 2012
(In thousands)	Municipal				Trust			Trust				Auction				Other			Private			Derivatives			Other
	securities				preferred – banks and insurance			preferred – REIT				rate				asset-backed			equity						liabilities
																			investments
Balance at June 30, 2012	$	16,360			$	926,450		$	14,431			$	7,166			$	40,666		$	65,370		$	(5,337	)	$	(121	)
Total net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	18				1,239			61				1				53
Dividends and other investment income																			3,562
Fair value and nonhedge derivative loss																						(5,403		)
Equity securities losses, net																			2,556
Fixed income securities gains, net	9				3,004											11
Net impairment losses on investment securities					(2,079		)
Other noninterest expense																									(7		)
Other comprehensive income (loss)	136				55,962			915				(4		)		2,418
Purchases																			2,803
Sales																			(1,126		)
Redemptions and paydowns	(200		)		(19,472		)					(50		)		(2,994		)	(1,271		)	5,692
Balance at September 30, 2012	$	16,323			$	965,104		$	15,407			$	7,113			$	40,154		$	71,894		$	(5,048	)	$	(128	)
	Level 3 Instruments
	Nine Months Ended September 30, 2012
(In thousands)	Municipal				Trust			Trust				Auction				Other			Private			Derivatives			Other
	securities				preferred – banks and insurance			preferred – REIT				rate				asset-backed			equity						liabilities
																			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	82				6,267			162				3				213
Dividends and other investment income																			9,167
Fair value and nonhedge derivative loss																						(16,303		)
Equity securities losses, net																			11,629
Fixed income securities gains, (losses), net	9				10,780							4,134				(5,762		)
Net impairment losses on investment securities					(19,255		)
Other noninterest expense																									(42		)
Other comprehensive income (loss)	(499		)		89,695			(3,400		)		1,331				8,301
Purchases																			7,687
Sales																			(6,478		)
Redemptions and paydowns	(650		)		(51,739		)					(68,375		)		(6,144		)	(12,438		)	16,677
Balance at September 30, 2012	$	16,323			$	965,104		$	15,407			$	7,113			$	40,154		$	71,894		$	(5,048	)	$	(128	)
The preceding reconciling amounts using Level 3 inputs include the following realized gains (losses):
(In thousands)	Three Months Ended September 30,							Nine Months Ended September 30,
	2013				2012			2013				2012
Dividends and other investment income (loss)	$	—			$	—		$	(45	)		$	—
Fixed income securities gains, net	1,506				3,024			3,622				9,161
Equity securities gains, net	—				—			—				10,359
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 September 30, 2013															Fair value at December 31, 2012
	Level 1				Level 2			Level 3				Total				Level 1			Level 2			Level 3			Total
ASSETS
HTM securities adjusted for OTTI	$	—			$	—		$	8,483			$	8,483			$	—		$	—		$	23,524		$	23,524
Impaired loans	—				4,164			—				4,164				—			3,789			—			3,789
Private equity investments, carried at cost	—				—			8,313				8,313				—			—			13,522			13,522
Other real estate owned	—				46,700			—				46,700				—			58,954			—			58,954
	$	—			$	50,864		$	16,796			$	67,660			$	—		$	62,743		$	37,046		$	99,789
The previous fair values may not be current as of the dates indicated, but rather as of the date the fair value change occurred, such as a charge for impairment. Carrying values may not equal current fair value.
	Gains (losses) from fair value changes
(In thousands)	Three Months Ended							Nine Months Ended
	September 30,							September 30,
	2013				2012			2013				2012
ASSETS
HTM securities adjusted for OTTI	$	—			$	(657	)	$	(403	)		$	(998	)
Impaired loans	(35		)		(818		)	(1,463		)		(3,859		)
Private equity investments, carried at cost	(2,826		)		(93		)	(4,254		)		(1,845		)
Other real estate owned	(1,749		)		(5,499		)	(8,217		)		(14,707		)
	$	(4,610	)		$	(7,067	)	$	(14,337	)		$	(21,409	)
HTM securities adjusted for OTTI were fair valued according to the methodology discussed elsewhere herein. Private equity investments carried at cost were fair valued according to the methodology discussed previously under Private Equity Investments. In previous reporting periods, the disclosure of private equity investments carried at cost was included with the private equity investments under the equity method of accounting. This revised disclosure had no effect on the Company’s financial statements or results of operations in the prior year periods. The amounts of private equity investments carried at cost were $56.0 million at September 30, 2013 and $74.8 million at December 31, 2012. Additionally, the amounts of other noninterest-bearing investments carried at cost were $248.6 million at September 30, 2013 and $255.6 million at December 31, 2012, which were comprised of Federal Reserve, Federal Home Loan Bank, and Farmer Mac stock.
During the three and nine months ended September 30, we recognized net gains of $3.5 million and $9.8 million in 2013 and $5.6 million and $11.4 million in 2012, respectively, from the sale of OREO properties that had a carrying value at the time of sale of approximately $61.1 million and $126.0 million during the nine months ended September 30, 2013 and 2012, respectively. Previous to their sale in these periods, we recognized impairment on these properties of $0.2 million and $0.6 million in 2013 and $3.3 million and $7.2 million in 2012, respectively.
Impaired (or nonperforming) loans that are collateral-dependent are fair valued under Level 2 based on the fair value of the collateral. OREO is fair valued under Level 2 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 impairment for collateral-dependent loans and OREO is based on third party appraisals that utilize one or more valuation techniques (income, market and/or cost approaches). Any adjustments to calculated fair value are made based on recently completed and validated third party appraisals, third party appraisal services, automated valuation services, or our informed judgment. Evaluations are made to determine that the appraisal process meets 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 sufficiently significant to consider disclosure under Level 3 rather than Level 2.
Impaired loans not collateral-dependent are 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:
	September 30, 2013							December 31, 2012
(In thousands)	Carrying				Estimated			Carrying				Estimated
	value				fair value			value				fair value
Financial assets:
HTM investment securities	$	777,849			$	727,908		$	756,909			$	674,741
Loans and leases (including loans held for sale), net of allowance	37,590,017				37,402,157			37,020,811				37,024,198
Financial liabilities:
Time deposits	2,689,688				2,703,085			2,962,931				2,988,714
Foreign deposits	1,607,409				1,607,052			1,804,060				1,803,625
Other short-term borrowings	—				—			5,409				5,421
Long-term debt (less fair value hedges)	2,298,853				2,529,021			2,329,323				2,636,422
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. HTM municipal securities are fair valued under Level 3 using a standard form discounted cash flow model as discussed previously and the valuation inputs described under auction rate securities. HTM bank and insurance trust preferred CDOs are fair valued using the internal model previously described.
The fair value of loans is estimated according to their status as nonimpaired or impaired. For nonimpaired loans, the 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 incorporate many of the inputs 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 5 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. Accordingly, our estimates of fair value for loans are categorized as Level 3.
The fair values of time and foreign deposits, other short-term borrowings, and long-term debt are estimated under Level 2. Time and foreign deposits, and other short-term borrowings, are fair valued by discounting future cash flows using the LIBOR yield curve to the given maturity dates. Long-term debt is fair valued 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 future expected loss experience, current economic conditions, risk characteristics of the various instruments, and other factors. These estimates are subjective in nature and involve uncertainties and matters of significant judgment and therefore cannot be determined with precision. Changes in the above methodologies and assumptions could significantly affect the estimates.
Further, certain financial instruments and all nonfinancial instruments are excluded from the applicable disclosure requirements. Therefore, the fair value amounts shown in the schedule do not, by themselves, represent the underlying value of the Company as a whole.

Commitments_Guarantees_And_Con

Commitments, Guarantees, And Contingent Liabilities	9 Months Ended
	Sep. 30, 2013
Guarantees, Commitments And Contingencies [Abstract]	'
Guarantees, Commitments And Contingencies	'
	COMMITMENTS, GUARANTEES AND CONTINGENT LIABILITIES
	Commitments and Guarantees
	Contractual amounts of off-balance sheet financial instruments used to meet the financing needs of our customers are as follows:
	(In thousands)	September 30,		December 31,
		2013		2012
	Unfunded commitments to extend credit	$	15,561,565	$	14,277,347
	Standby letters of credit:
	Financial	812,493		774,427
	Performance	179,108		190,029
	Commercial letters of credit	62,832		91,978
	Total unfunded lending commitments	$	16,615,998	$	15,333,781
	The Company’s 2012 Annual Report on Form 10-K contains further information about these commitments and guarantees including their terms and collateral requirements. At September 30, 2013, the Company had recorded approximately $8.2 million as a liability for the guarantees associated with the standby letters of credit, which consisted of $4.7 million attributable to the RULC and $3.5 million of deferred commitment fees.
	At September 30, 2013, the Parent has guaranteed $15 million of debt of affiliated trusts issuing trust preferred securities. In connection with the redemption on May 3, 2013 of all of the $285 million of Zions Capital Trust B trust preferred securities, as discussed in Note 7, the Parent canceled its guarantee for these securities.
	At September 30, 2013, we had unfunded commitments for private equity and other noninterest-bearing investments of $28.1 million. These obligations have no stated maturity.
	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 allegedly wrongful acts in our processing of overdraft fees on debit card transactions in which the plaintiffs seek monetary awards on the basis of various common law claims, Barlow, et. al. v. Zions First National Bank and Zions Bancorporation, pending in the United States District Court for the District of Utah;
	•	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 liability, 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 parties to the Barlow case entered into definitive settlement agreements, which cover all of our affiliates alleged to have engaged in wrongful processing. The amount of the settlement is reflected in our accruals for legal losses as of September 30, 2013. The settlement is subject to court approval. 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.
	In the third quarter of 2013, the District Court denied the plaintiff’s motion for class certification in the Reyes case. The plaintiff has filed a motion to appeal the District Court decision. We have elected not to oppose that motion.
	Discovery has been completed in the Reyes case, but has not commenced in the Meridian Funds case.
	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 banking subsidiaries 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 (conducted by the United States Attorney’s Office for the Eastern District of Pennsylvania).
	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 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 approximately $60 million in excess of amounts accrued. This estimated range of reasonably possible losses is based on information currently available as of September 30, 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 an 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.

Retirement_Plans

Retirement Plans	9 Months Ended
	Sep. 30, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Retirement Plans	'
	RETIREMENT PLANS
	The following discloses the net periodic benefit cost (credit) and its components for the Company’s pension and postretirement plans:
		Pension benefits						Supplemental					Postretirement						Pension benefits						Supplemental					Postretirement
								retirement					benefits												retirement					benefits
								benefits																	benefits
	(In thousands)	Three Months Ended September 30,																	Nine Months Ended September 30,
		2013			2012			2013		2012			2013			2012			2013			2012			2013		2012			2013			2012
	Service cost	$	—		$	(3	)	$	—	$	—		$	8		$	9		$	—		$	22		$	—	$	—		$	24		$	27
	Interest cost	1,721			1,885			101		115			10			12			5,164			5,669			303		345			31			35
	Expected return on plan assets	(3,027		)	(2,827		)												(9,082		)	(8,481		)
	Amortization of prior service							31		31			(37		)	(61		)							93		93			(113		)	(183		)
	cost (credit)
	Amortization of net actuarial	2,033			2,198			17		(28		)	(19		)	(22		)	6,099			6,889			52		(85		)	(56		)	(65		)
	(gain) loss
	Net periodic benefit cost (credit)	$	727		$	1,253		$	149	$	118		$	(38	)	$	(62	)	$	2,181		$	4,099		$	448	$	353		$	(114	)	$	(186	)
	As disclosed in the Company’s 2012 Annual Report on Form 10-K, the Company has frozen its participation and benefit accruals for the pension plan and its contributions for individual benefit payments in the postretirement benefit plan.

Operating_Segment_Information

Operating Segment Information	9 Months Ended
	Sep. 30, 2013
Operating Segment Information [Abstract]	'
Operating Segment Information	'
	OPERATING SEGMENT INFORMATION
	We manage our operations and prepare management reports and other information with a primary focus on geographical area. As of September 30, 2013, we operate eight community/regional banks in distinct geographical areas. Performance assessment and resource allocation are based upon this geographical structure. Zions Bank operates 100 branches in Utah and 26 branches in Idaho. CB&T operates 97 branches in California. Amegy operates 84 branches in Texas. NBAZ operates 72 branches in Arizona. NSB operates 51 branches in Nevada. Vectra operates 38 branches in Colorado and one branch in New Mexico. TCBW operates one branch in the state of Washington. TCBO operates one branch in Oregon.
	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 operations are significant to the Other segment. Net interest income is substantially affected by the Parent’s interest on long-term debt. Net impairment losses on investment securities relate to the Parent. 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.
	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 table presents selected operating segment information for the three months ended September 30, 2013 and 2012:
	(In millions)	Zions Bank						CB&T						Amegy						NBAZ						NSB
		2013			2012			2013			2012			2013			2012			2013			2012			2013			2012
	CONDENSED INCOME STATEMENT
	Net interest income	$	145.1		$	165		$	109.8		$	118		$	95.5		$	91.6		$	40.5		$	41.9		$	28.4		$	30.4
	Provision for loan losses	(9.5		)	17.1			(3.0		)	(2.8		)	12.8			(18.3		)	(7.3		)	1.7			—			(1.2		)
	Net interest income after provision for loan losses	154.6			147.9			112.8			120.8			82.7			109.9			47.8			40.2			28.4			31.6
	Net impairment losses on investment securities	—			(0.1		)	—			—			—			—			—			—			—			—
	Loss on sale of investment securities to Parent	—			—			—			—			—			—			—			—			—			—
	Other noninterest income	47.7			52.1			20.8			19.3			37.1			38.3			8.6			7.6			11.4			8.8
	Noninterest expense	119.1			123.5			75.9			85.2			75.3			86.3			35.3			37.3			32			31.3
	Income (loss) before income taxes	83.2			76.4			57.7			54.9			44.5			61.9			21.1			10.5			7.8			9.1
	Income tax expense (benefit)	30.2			27.4			23			21.8			14.9			20.8			7.7			3.4			2.6			3.1
	Net income (loss)	$	53		$	49		$	34.7		$	33.1		$	29.6		$	41.1		$	13.4		$	7.1		$	5.2		$	6
	AVERAGE BALANCE SHEET DATA
	Total assets	$	18,237		$	17,641		$	10,869		$	11,000		$	13,453		$	12,231		$	4,624		$	4,447		$	4,022		$	4,085
	Cash and due from banks	339			359			164			168			255			259			70			70			87			83
	Money market investments	3,868			2,725			1,288			1,296			2,823			2,446			444			482			883			936
	Total securities	1,287			1,331			321			362			285			313			320			274			785			774
	Total loans	12,271			12,566			8,328			8,332			8,981			8,073			3,600			3,402			2,158			2,156
	Total deposits	15,951			15,140			9,261			9,404			11,024			9,805			3,945			3,766			3,600			3,597
	Shareholder’s equity:
	Preferred equity	280			444			162			184			248			330			153			198			90			180
	Common equity	1,530			1,441			1,326			1,307			1,805			1,689			410			379			310			286
	Noncontrolling interests	—			—			—			—			—			—			—			—			—			—
	Total shareholder’s equity	1,810			1,885			1,488			1,491			2,053			2,019			563			577			400			466
		Vectra						TCBW						Other						Consolidated
																				Company
		2013			2012			2013			2012			2013			2012			2013			2012
	CONDENSED INCOME STATEMENT
	Net interest income	$	25.8		$	27.3		$	7		$	6.9		$	(36.6	)	$	(42.9	)	$	415.5		$	438.2
	Provision for loan losses	1.8			2.2			(0.3		)	(0.6		)	(0.1		)	—			(5.6		)	(1.9		)
	Net interest income after provision for loan losses	24			25.1			7.3			7.5			(36.5		)	(42.9		)	421.1			440.1
	Net impairment losses on investment securities	—			—			—			—			(9.1		)	(2.7		)	(9.1		)	(2.8		)
	Loss on sale of investment	—			—			(2.7		)	—			2.7			—			—			—
	securities to Parent
	Other noninterest income	6.5			7.6			1			1			(1.8		)	(6.7		)	131.3			128
	Noninterest expense	24.4			23.4			4.8			4.9			3.9			3.1			370.7			395
	Income (loss) before income taxes	6.1			9.3			0.8			3.6			(48.6		)	(55.4		)	172.6			170.3
	Income tax expense (benefit)	2.1			3.2			0.3			1.2			(19.7		)	(20.2		)	61.1			60.7
	Net income (loss)	$	4		$	6.1		$	0.5		$	2.4		$	(28.9	)	$	(35.2	)	$	111.5		$	109.6
	AVERAGE BALANCE SHEET DATA
	Total assets	$	2,630		$	2,441		$	882		$	863		$	798		$	659		$	55,515		$	53,367
	Cash and due from banks	48			54			19			20			(6		)	(13		)	976			1,000
	Money market investments	127			47			121			158			(100		)	(100		)	9,454			7,990
	Total securities	184			207			101			115			592			449			3,875			3,825
	Total loans	2,195			2,046			627			556			64			68			38,224			37,199
	Total deposits	2,258			2,085			743			722			(1,194		)	(1,041		)	45,588			43,478
	Shareholder’s equity:
	Preferred equity	70			70			3			2			680			357			1,686			1,765
	Common equity	241			214			86			80			(518		)	(637		)	5,190			4,759
	Noncontrolling interests	—			—			—			—			—			(3		)	—			(3		)
	Total shareholder’s equity	311			284			89			82			162			(283		)	6,876			6,521
	The following table presents selected operating segment information for the nine months ended September 30, 2013 and 2012:
	(In millions)	Zions Bank						CB&T						Amegy						NBAZ						NSB
		2013			2012			2013			2012			2013			2012			2013			2012			2013			2012
	CONDENSED INCOME STATEMENT
	Net interest income	$	447.4		$	498.7		$	347		$	352.4		$	284.9		$	278.5		$	122.4		$	125.3		$	84.4		$	92.6
	Provision for loan losses	(18.4		)	78			(12.8		)	(9.5		)	4.7			(50.5		)	(12.0		)	10.7			(8.9		)	(9.5		)
Net interest income after provision for loan losses	465.8			420.7			359.8			361.9			280.2			329			134.4			114.6			93.3			102.1
Net impairment losses on investment securities	—			(0.3		)	—			—			—			—			—			—			—			—
Loss on sale of investment securities to Parent	—			—			—			(9.2		)	—			—			—			—			—			—
Other noninterest income	152.2			163.5			62.1			57.5			111			115			25.6			23.2			30			25.3
Noninterest expense	362.1			371			260.7			250.8			251.4			255.1			104.9			113.2			97.9			101
Income (loss) before income taxes	255.9			212.9			161.2			159.4			139.8			188.9			55.1			24.6			25.4			26.4
Income tax expense (benefit)	93.3			75.5			63.7			63.1			46.8			62.9			20.5			8.9			8.6			9.1
Net income (loss)	$	162.6		$	137.4		$	97.5		$	96.3		$	93		$	126		$	34.6		$	15.7		$	16.8		$	17.3
AVERAGE BALANCE SHEET DATA
Total assets	$	17,609		$	17,410		$	10,871		$	10,905		$	13,122		$	12,116		$	4,612		$	4,457		$	4,046		$	4,127
Cash and due from banks	347			367			168			176			283			293			70			70			85			87
Money market investments	3,113			2,507			1,284			1,175			2,563			2,357			452			569			944			960
Total securities	1,279			1,380			333			350			336			331			298			276			769			770
Total loans	12,330			12,501			8,297			8,342			8,790			8,012			3,588			3,321			2,127			2,176
Total deposits	15,314			14,887			9,267			9,246			10,707			9,625			3,919			3,732			3,606			3,597
Shareholder’s equity:
Preferred equity	280			468			162			231			250			409			171			259			114			227
Common equity	1,524			1,419			1,324			1,293			1,775			1,665			406			363			304			280
Noncontrolling interests	—			—			—			—			—			—			—			—			—			—
Total shareholder’s equity	1,804			1,887			1,486			1,524			2,025			2,074			577			622			418			507
	Vectra						TCBW						Other						Consolidated
																			Company
	2013			2012			2013			2012			2013			2012			2013			2012
CONDENSED INCOME STATEMENT
Net interest income	$	76.5		$	81.5		$	20.3		$	20.9		$	(118.6	)	$	(147.9	)	$	1,264.30		$	1,302.00
Provision for loan losses	(7.6		)	4.6			(1.1		)	0.8			(0.5		)	—			(56.6		)	24.6
Net interest income after provision for loan losses	84.1			76.9			21.4			20.1			(118.1		)	(147.9		)	1,320.90			1,277.40
Net impairment losses on investment securities	—			—			—			—			(23.4		)	(20.0		)	(23.4		)	(20.3		)
Loss on sale of investment	—			—			(2.7		)	—			2.7			9.2			—			—
securities to Parent
Other noninterest income	19.6			18.7			3			2.8			(11.6		)	(20.0		)	391.9			386
Noninterest expense	75			73			13.6			13.9			54.1			11			1,219.70			1,189.00
Income (loss) before income taxes	28.7			22.6			8.1			9			(204.5		)	(189.7		)	469.7			454.1
Income tax expense (benefit)	10			7.5			2.8			3			(80.9		)	(66.4		)	164.8			163.6
Net income (loss)	$	18.7		$	15.1		$	5.3		$	6		$	(123.6	)	$	(123.3	)	$	304.9		$	290.5
AVERAGE BALANCE SHEET DATA
Total assets	$	2,541		$	2,395		$	866		$	877		$	1,019		$	660		$	54,686		$	52,947
Cash and due from banks	50			52			19			20			(9		)	(16		)	1,013			1,049
Money market investments	84			49			135			168			169			(98		)	8,744			7,687
Total securities	184			217			103			119			551			444			3,853			3,887
Total loans	2,142			1,991			596			556			63			68			37,933			36,967
Total deposits	2,177			2,047			727			730			(718		)	(932		)	44,999			42,932
Shareholder’s equity:
Preferred equity	70			70			3			10			429			309			1,479			1,983
Common equity	235			208			84			78			(557		)	(600		)	5,095			4,706
Noncontrolling interests	—			—			—			—			(2		)	(3		)	(2		)	(3		)
Total shareholder’s equity	305			278			87			88			(130		)	(294		)	6,572			6,686

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	3 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Information [Abstract]	'
Schedule of Other Significant Noncash Transactions [Table Text Block]	'
	(In thousands)	Three Months Ended				Nine Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Loans transferred to other real estate owned	$	12,098	$	37,140	$	52,916	$	141,439
	Beneficial conversion feature transferred from common stock to preferred stock as a result of subordinated debt conversions	—		917		206		14,519
	Subordinated debt converted to preferred stock	—		5,386		1,210		85,352
	Preferred stock transferred to common stock as a result of the Series C preferred stock redemption	580		—		580		—
	Preferred stock/beneficial conversion feature transferred to retained earnings as a result of the Series C preferred stock redemption	125,700		—		125,700		—

Cash_and_Money_Market_Investme1

Cash and Money Market Investments Cash and Money Market Investments (Tables)	9 Months Ended																			12 Months Ended
	Sep. 30, 2013																			Dec. 31, 2012
Gross and net information for selected financial instruments [Abstract]	'																			'
Fair Value, by Balance Sheet Grouping [Table Text Block]	'																			'
			September 30, 2013																		December 31, 2012
	(In thousands)											Gross amounts not offset in the balance sheet								(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		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:																			Assets:
	Federal funds sold and security resell agreements		$	209,070		$	—		$	209,070		$	—		$	—		$	209,070	Federal funds sold and security resell agreements	$	3,675,354	$	(900,000	)	$	2,775,354	$	—		$	—		$	2,775,354
	Derivatives (included in other assets)		55,568			—			55,568			(8,282		)	—			47,286		Derivatives (included in other assets)	81,810		—			81,810		(409		)	—			81,401
			$	264,638		$	—		$	264,638		$	(8,282	)	$	—		$	256,356		$	3,757,164	$	(900,000	)	$	2,857,164	$	(409	)	$	—		$	2,856,755
	Liabilities:																			Liabilities:
	Federal funds purchased and security repurchase agreements		$	252,591		$	—		$	252,591		$	—		$	—		$	252,591	Federal funds purchased and security repurchase agreements	$	1,220,478	$	(900,000	)	$	320,478	$	—		$	—		$	320,478
	Derivatives (included in other liabilities)		59,914			—			59,914			(8,282		)	(37,232		)	14,400		Derivatives (included in other liabilities)	89,100		—			89,100		(409		)	(81,683		)	7,008
			$	312,505		$	—		$	312,505		$	(8,282	)	$	(37,232	)	$	266,991		$	1,309,578	$	(900,000	)	$	409,578	$	(409	)	$	(81,683	)	$	327,486
		September 30, 2013						December 31, 2012
	(In thousands)	Carrying			Estimated			Carrying			Estimated
		value			fair value			value			fair value
	Financial assets:
	HTM investment securities	$	777,849		$	727,908		$	756,909		$	674,741
	Loans and leases (including loans held for sale), net of allowance	37,590,017			37,402,157			37,020,811			37,024,198
	Financial liabilities:
	Time deposits	2,689,688			2,703,085			2,962,931			2,988,714
	Foreign deposits	1,607,409			1,607,052			1,804,060			1,803,625
	Other short-term borrowings	—			—			5,409			5,421
	Long-term debt (less fair value hedges)	2,298,853			2,529,021			2,329,323			2,636,422

Investment_Securities_Tables

Investment Securities (Tables)	9 Months Ended																																															12 Months Ended
	Sep. 30, 2013																												Sep. 30, 2012																			Dec. 31, 2012
Investments [Abstract]	'																												'																			'
Summary Of Investment Securities	'																												'																			'
		September 30, 2013
					Recognized in OCI											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	$	558,134		$	—			$	—		$	558,134			$	11,537		$	5,061			$	564,610
	Asset-backed securities:
	Trust preferred securities – banks and insurance	255,159			—				54,432			200,727				5,879			55,058				151,548
	Other	21,061			—				2,173			18,888				900			8,138				11,650
	Other debt securities	100			—				—			100				—			—				100
		834,454			—				56,605			777,849				18,316			68,257				727,908
	Available-for-sale
	U.S. Treasury securities	39,908			136				—			40,044											40,044
	U.S. Government agencies and corporations:
	Agency securities	440,170			2,120				197			442,093											442,093
	Agency guaranteed mortgage-backed securities	308,964			11,619				609			319,974											319,974
	Small Business Administration loan-backed securities	1,139,211			27,829				1,614			1,165,426											1,165,426
	Municipal securities	64,694			1,509				1,034			65,169											65,169
	Asset-backed securities:
	Trust preferred securities – banks and insurance	1,521,628			14,391				534,123			1,001,896											1,001,896
	Trust preferred securities – real estate investment trusts	39,391			—				19,874			19,517											19,517
	Auction rate securities	6,506			135				16			6,625											6,625
	Other	18,496			406				2,788			16,114											16,114
		3,578,968			58,145				560,255			3,076,858											3,076,858
	Mutual funds and other	262,493			182				5,644			257,031											257,031
		3,841,461			58,327				565,899			3,333,889											3,333,889
	Total	$	4,675,915		$	58,327			$	622,504		$	4,111,738										$	4,061,797
		December 31, 2012
					Recognized in OCI											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
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	$	66,525		$	66,502			$	466,546		$	441,052
	Due after one year through five years	200,748			198,494				1,112,538			1,050,208
	Due after five years through ten years	213,234			179,794				640,232			597,543
	Due after ten years	353,947			283,118				1,359,652			988,055
		$	834,454		$	727,908			$	3,578,968		$	3,076,858
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 investment securities and the estimated fair value by length of time the securities have been in an unrealized loss position:
		September 30, 2013																																																December 31, 2012
		Less than 12 months							12 months or more							Total																																		Less than 12 months				12 months or more				Total
	(In thousands)	Gross			Estimated				Gross			Estimated				Gross			Estimated																														(In thousands)	Gross unrealized losses		Estimated fair value		Gross unrealized losses		Estimated fair value		Gross unrealized losses		Estimated fair value
		unrealized			fair				unrealized			fair				unrealized			fair
		losses			value				losses			value				losses			value
	Held-to-maturity																																																Held-to-maturity
	Municipal securities	$	4,247		$	91,497			$	814		$	10,915			$	5,061		$	102,412																													Municipal securities	$	630	$	42,613	$	79	$	5,910	$	709	$	48,523
	Asset-backed securities:																																																Asset-backed securities:
																																																	Trust preferred securities – banks and insurance	—		—		129,560		126,019		129,560		126,019
	Trust preferred securities – banks and insurance	—			—				109,490			151,350				109,490			151,350
																																																	Other	—		—		10,993		10,904		10,993		10,904
	Other	—			—				10,311			11,291				10,311			11,291
																																																		630		42,613		140,632		142,833		141,262		185,446
		4,247			91,497				120,615			173,556				124,862			265,053
																																																	Available-for-sale
	Available-for-sale																																																U.S. Government agencies and corporations:
	U.S. Government agencies and corporations:																																																Agency securities	35		18,633		81		6,916		116		25,549
	Agency securities	119			24,255				78			6,495				197			30,750
																																																	Agency guaranteed mortgage-backed securities	10		6,032		6		629		16		6,661
	Agency guaranteed mortgage-backed securities	605			41,847				4			609				609			42,456
																																																	Small Business Administration loan-backed securities	91		15,199		548		69,011		639		84,210
	Small Business Administration loan-backed securities	784			76,868				830			39,855				1,614			116,723
																																																	Municipal securities	61		4,898		1,909		11,768		1,970		16,666
	Municipal securities	20			2,871				1,014			8,507				1,034			11,378
																																																	Asset-backed securities:
	Asset-backed securities:																																																Trust preferred securities – banks and insurance	—		—		663,451		765,421		663,451		765,421
	Trust preferred securities – banks and insurance	1,138			54,760				532,985			840,551				534,123			895,311																														Trust preferred securities – real estate investment trusts	—		—		24,082		16,403		24,082		16,403
	Trust preferred securities – real estate investment trusts	—			—				19,874			19,518				19,874			19,518																														Auction rate securities	—		—		68		2,459		68		2,459
	Auction rate securities	—			—				16			896				16			896																														Other	—		—		6,941		15,234		6,941		15,234
	Other	—			—				2,788			13,514				2,788			13,514																															197		44,762		697,086		887,841		697,283		932,603
		2,666			200,601				557,589			929,945				560,255			1,130,546																														Mutual funds and other	652		112,324		—		—		652		112,324
	Mutual funds and other	5,644			124,448				—			—				5,644			124,448																															849		157,086		697,086		887,841		697,935		1,044,927
		8,310			325,049				557,589			929,945				565,899			1,254,994																														Total	$	1,479	$	199,699	$	837,718	$	1,030,674	$	839,197	$	1,230,373
	Total	$	12,557		$	416,546			$	678,204		$	1,103,501			$	690,761		$	1,520,047
Rollforward Of Total Amount Of Credit-Related OTTI	'																												'																			'
	(In thousands)	Three Months Ended										Nine Months Ended																	(In thousands)	Three Months Ended									Nine Months Ended
		30-Sep-13										30-Sep-13																		30-Sep-12									30-Sep-12
		HTM			AFS				Total			HTM				AFS			Total											HTM			AFS			Total			HTM			AFS			Total
	Balance of credit-related OTTI at beginning	$	(13,952	)	$	(406,577	)		$	(420,529	)	$	(13,549	)		$	(394,494	)	$	(408,043	)								Balance of credit-related OTTI at beginning	$	(6,467	)	$	(315,183	)	$	(321,650	)	$	(6,126	)	$	(314,860	)	$	(320,986	)
	of period																												of period
	Additions recognized in earnings during the period:																												Additions recognized in earnings during the period:
	Credit-related OTTI on securities not previously impaired	—			(168		)		(168		)	(403		)		(168		)	(571		)								Credit-related OTTI on securities not previously impaired	—			—			—			(341		)	—			(341		)
	Additional credit-related OTTI on securities previously impaired	—			(8,899		)		(8,899		)	—				(22,830		)	(22,830		)								Additional credit-related OTTI on securities previously impaired	(657		)	(2,079		)	(2,736		)	(657		)	(19,255		)	(19,912		)
																													Subtotal of amounts recognized in earnings	(657		)	(2,079		)	(2,736		)	(998		)	(19,255		)	(20,253		)
	Subtotal of amounts recognized in earnings	—			(9,067		)		(9,067		)	(403		)		(22,998		)	(23,401		)								Reductions for securities sold or paid off during the period	—			—			—			—			16,853			16,853
	Reductions for securities sold or paid off during the period	—			—				—			—				1,848			1,848										Balance of credit-related OTTI at end of period	$	(7,124	)	$	(317,262	)	$	(324,386	)	$	(7,124	)	$	(317,262	)	$	(324,386	)
	Balance of credit-related OTTI at end of period	$	(13,952	)	$	(415,644	)		$	(429,596	)	$	(13,952	)		$	(415,644	)	$	(429,596	)
Noncredit Related OTTI	'																												'																			'
	(In thousands)	Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013			2012				2013			2012
	HTM	$	—		$	—			$	16,114		$	16,718
	AFS	1,403			1,140				7,358			9,204
		$	1,403		$	1,140			$	23,472		$	25,922
Gains And Losses, Including OTTI, Recognized In Statement Of Income	'																												'																			'
			Three Months Ended														Nine Months Ended
			September 30, 2013							September 30, 2012							September 30, 2013							September 30, 2012
		(In thousands)	Gross gains			Gross losses				Gross gains			Gross losses				Gross gains			Gross losses				Gross gains		Gross losses
		Investment securities:
		Held-to-maturity	$	32		$	—			$	22		$	657			$	63		$	403			$	120	$	998
		Available-for-sale	1,551			9,070				3,026			2,081				7,989			27,324				14,955		25,045
		Other noninterest-bearing investments:
		Nonmarketable equity securities	4,802			1,637				3,230			547				9,868			1,662				22,951		11,016
			6,385			10,707				6,278			3,285				17,920			29,389				38,026		37,059
		Net gains (losses)				$	(4,322	)					$	2,993						$	(11,469	)				$	967
		Statement of income information:
		Net impairment losses on investment securities				$	(9,067	)					$	(2,736	)					$	(23,401	)				$	(20,253	)
		Equity securities gains, net				3,165							2,683							8,206						11,935
		Fixed income securities gains, net				1,580							3,046							3,726						9,285
		Net gains (losses)				$	(4,322	)					$	2,993						$	(11,469	)				$	967

Loans_And_Allowance_For_Credit1

Loans And Allowance For Credit Losses (Tables)	9 Months Ended																																		12 Months Ended
	Sep. 30, 2013																					Sep. 30, 2012													Dec. 31, 2012
Loans And Allowance For Credit Losses [Abstract]	'																					'													'
Summary Of Major Portfolio Segment And Specific Loan Class	'																					'													'
	(In thousands)	September 30,			December 31,
		2013			2012
	Loans held for sale	$	114,810		$	251,651
	Commercial:
	Commercial and industrial	$	11,904,477		$	11,256,945
	Leasing	375,125			422,513
	Owner occupied	7,378,586			7,589,082
	Municipal	448,643			494,183
	Total commercial	20,106,831			19,762,723
	Commercial real estate:
	Construction and land development	2,240,295			1,939,413
	Term	7,928,540			8,062,819
	Total commercial real estate	10,168,835			10,002,232
	Consumer:
	Home equity credit line	2,124,328			2,177,680
	1-4 family residential	4,636,895			4,350,329
	Construction and other consumer real estate	321,436			321,235
	Bankcard and other revolving plans	331,966			306,428
	Other	207,578			216,379
	Total consumer	7,622,203			7,372,051
	FDIC-supported loans	374,861			528,241
	Total loans	$	38,272,730		$	37,665,247
Summary Of Changes in The Allowance For Credit Losses	'																					'													'
Summary Of Nonaccrual Loans	'																					'													'
	Nonaccrual loans are summarized as follows:
	(In thousands)	September 30,			December 31,
		2013			2012
	Commercial:
	Commercial and industrial	$	100,188		$	90,859
	Leasing	796			838
	Owner occupied	157,609			206,031
	Municipal	10,006			9,234
	Total commercial	268,599			306,962
	Commercial real estate:
	Construction and land development	65,320			107,658
	Term	60,378			124,615
	Total commercial real estate	125,698			232,273
	Consumer:
	Home equity credit line	8,425			14,247
	1-4 family residential	57,658			70,180
	Construction and other consumer real estate	4,080			4,560
	Bankcard and other revolving plans	1,186			1,190
	Other	1,149			1,398
	Total consumer loans	72,498			91,575
	FDIC-supported loans	4,744			17,343
	Total	$	471,539		$	648,153
Summary Of Past Due Loans (Accruing And Nonaccruing)	'																					'													'
	Past due loans (accruing and nonaccruing) are summarized as follows:
		September 30, 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	$	11,820,258		$	28,268			$	55,951		$	84,219			$	11,904,477	$	2,280	$	44,546
	Leasing	374,200			323				602			925				375,125		—		—
	Owner occupied	7,289,080			39,538				49,968			89,506				7,378,586		3,106		97,378
	Municipal	448,643			—				—			—				448,643		—		10,006
	Total commercial	19,932,181			68,129				106,521			174,650				20,106,831		5,386		151,930
	Commercial real estate:
	Construction and land development	2,200,392			21,609				18,294			39,903				2,240,295		—		28,140
	Term	7,885,730			17,940				24,870			42,810				7,928,540		2,361		33,780
	Total commercial real estate	10,086,122			39,549				43,164			82,713				10,168,835		2,361		61,920
	Consumer:
	Home equity credit line	2,116,048			4,357				3,923			8,280				2,124,328		—		3,226
	1-4 family residential	4,598,613			13,816				24,466			38,282				4,636,895		551		28,850
	Construction and other consumer real estate	317,305			1,574				2,557			4,131				321,436		368		1,738
	Bankcard and other revolving plans	329,055			1,951				960			2,911				331,966		669		840
	Other	205,798			822				958			1,780				207,578		63		70
	Total consumer loans	7,566,819			22,520				32,864			55,384				7,622,203		1,651		34,724
	FDIC-supported loans	339,085			11,162				24,614			35,776				374,861		22,450		2,400
	Total	$	37,924,207		$	141,360			$	207,163		$	348,523			$	38,272,730	$	31,848	$	250,974
		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 that are 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	'																					'													'
		September 30, 2013
	(In thousands)	Pass			Special				Sub-			Doubtful				Total		Total
					Mention				standard							loans		allowance
	Commercial:
	Commercial and industrial	$	11,176,352		$	331,846			$	391,335		$	4,944			$	11,904,477
	Leasing	369,152			2,875				3,098			—				375,125
	Owner occupied	6,760,607			131,895				484,779			1,305				7,378,586
	Municipal	438,637			—				10,006			—				448,643
	Total commercial	18,744,748			466,616				889,218			6,249				20,106,831		$	479,275
	Commercial real estate:
	Construction and land development	2,094,934			15,250				127,875			2,236				2,240,295
	Term	7,414,358			213,538				300,644			—				7,928,540
	Total commercial real estate	9,509,292			228,788				428,519			2,236				10,168,835		244,008
	Consumer:
	Home equity credit line	2,105,327			—				19,001			—				2,124,328
	1-4 family residential	4,563,611			—				73,284			—				4,636,895
	Construction and other consumer real estate	312,046			—				9,390			—				321,436
	Bankcard and other revolving plans	329,442			—				2,524			—				331,966
	Other	206,174			—				1,404			—				207,578
	Total consumer loans	7,516,600			—				105,603			—				7,622,203		68,509
	FDIC-supported loans	253,788			20,401				100,672			—				374,861		5,731
	Total	$	36,024,428		$	715,805			$	1,524,012		$	8,485			$	38,272,730	$	797,523
		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	'																					'													'
																																			The ALLL and outstanding loan balances according to the Company’s impairment method are summarized as follows:
		September 30, 2013																																		September 30, 2013
	(In thousands)	Unpaid			Recorded investment							Total				Related																			(In thousands)	Commercial		Commercial		Consumer		FDIC-		Total
		principal										recorded				allowance																						real estate				supported
		balance			with no				with			investment																							Allowance for loan losses:
					allowance				allowance																										Individually evaluated for impairment	$	39,950	$	15,117	$	12,189	$	—	$	67,256
	Commercial:
	Commercial and industrial	$	176,337		$	29,242			$	124,439		$	153,681			$	20,670																		Collectively evaluated for impairment	439,325		228,891		56,320		607		725,143
	Owner occupied	166,488			50,883				102,850			153,733				15,668																			Purchased loans with evidence of credit deterioration	—		—		—		5,124		5,124
	Total commercial	342,825			80,125				227,289			307,414				36,338																			Total	$	479,275	$	244,008	$	68,509	$	5,731	$	797,523
	Commercial real estate:
	Construction and land development	130,435			48,912				64,479			113,391				3,572																			Outstanding loan balances:
																																			Individually evaluated for impairment	$	327,999	$	322,996	$	104,308	$	1,051	$	756,354
	Term	207,519			47,754				134,593			182,347				10,243
																																			Collectively evaluated for impairment	19,778,832		9,845,839		7,517,895		40,559		37,183,125
	Total commercial real estate	337,954			96,666				199,072			295,738				13,815
																																			Purchased loans with evidence of credit deterioration	—		—		—		333,251		333,251
	Consumer:
	Home equity credit line	15,056			9,780				2,464			12,244				182																			Total	$	20,106,831	$	10,168,835	$	7,622,203	$	374,861	$	38,272,730
	1-4 family residential	101,913			39,774				46,529			86,303				11,778
	Construction and other consumer real estate	6,238			3,169				1,603			4,772				229
																																				December 31, 2012
	Other	753			753				—			753				—																			(In thousands)	Commercial		Commercial		Consumer		FDIC-		Total
																																						real estate				supported
	Total consumer loans	123,960			53,476				50,596			104,072				12,189																			Allowance for loan losses:
																																			Individually evaluated for impairment	$	30,587	$	22,295	$	13,758	$	—	$	66,640
	FDIC-supported loans	441,347			121,381				212,921			334,302				5,124
																																			Collectively evaluated for impairment	480,321		254,681		81,898		422		817,322
	Total	$	1,246,086		$	351,648			$	689,878		$	1,041,526			$	67,466
																																			Purchased loans with evidence of credit deterioration	—		—		—		12,125		12,125
																																			Total	$	510,908	$	276,976	$	95,656	$	12,547	$	896,087
		December 31, 2012
	(In thousands)	Unpaid			Recorded investment							Total				Related																			Outstanding loan balances:
		principal										recorded				allowance																			Individually evaluated for impairment	$	353,380	$	437,647	$	112,320	$	1,149	$	904,496
		balance			with no				with			investment
					allowance				allowance																										Collectively evaluated for impairment	19,409,343		9,564,585		7,259,731		57,896		36,291,555
	Commercial:
	Commercial and industrial	$	176,521		$	27,035			$	119,780		$	146,815			$	12,198																		Purchased loans with evidence of credit deterioration	—		—		—		469,196		469,196
	Owner occupied	210,319			79,413				106,282			185,695				17,105																			Total	$	19,762,723	$	10,002,232	$	7,372,051	$	528,241	$	37,665,247
	Total commercial	386,840			106,448				226,062			332,510				29,303
	Commercial real estate:
	Construction and land development	182,385			67,241				85,855			153,096				5,178
	Term	310,242			70,718				187,112			257,830				16,725
	Total commercial real estate	492,627			137,959				272,967			410,926				21,903
	Consumer:
	Home equity credit line	14,339			8,055				3,444			11,499				297
	1-4 family residential	108,934			42,602				49,867			92,469				12,921
	Construction and other consumer real estate	7,054			2,710				3,085			5,795				517
	Bankcard and other revolving plans	287			—				287			287				1
	Other	2,454			1,832				175			2,007				22
	Total consumer loans	133,068			55,199				56,858			112,057				13,758
	FDIC-supported loans	895,804			275,187				195,158			470,345				12,125
	Total	$	1,908,339		$	574,793			$	751,045		$	1,325,838			$	77,089
		Three Months Ended							Nine Months Ended
		30-Sep-13							30-Sep-13
	(In thousands)	Average			Interest				Average			Interest
		recorded			income				recorded			income
		investment			recognized				investment			recognized
	Commercial:
	Commercial and industrial	$	199,217		$	1,105			$	175,040		$	2,594
	Owner occupied	217,439			915				211,225			2,810
	Municipal	—			—				—			—
	Total commercial	416,656			2,020				386,265			5,404
Commercial real estate:
Construction and land development	135,013			623				139,194			2,754
Term	288,980			1,969				285,307			5,571
Total commercial real estate	423,993			2,592				424,501			8,325
Consumer:
Home equity credit line	14,606			120				12,943			262
1-4 family residential	103,379			457				100,012			1,171
Construction and other consumer real estate	5,501			49				5,767			141
Bankcard and other revolving plans	—			—				—			—
Other	1,751			—				1,784			—
Total consumer loans	125,237			626				120,506			1,574
FDIC-supported loans	363,293			20,004			1	404,826			79,153			1
Total	$	1,329,179		$	25,242			$	1,336,098		$	94,456
	Three Months Ended							Nine Months Ended
	30-Sep-12							30-Sep-12
(In thousands)	Average			Interest				Average			Interest
	recorded			income				recorded			income
	investment			recognized				investment			recognized
Commercial:
Commercial and industrial	$	133,120		$	830			$	128,930		$	2,395
Owner occupied	187,072			558				168,328			1,729
Municipal	3,943			—				1,314			—
Total commercial	324,135			1,388				298,572			4,124
Commercial real estate:
Construction and land development	205,295			1,133				188,064			2,780
Term	288,735			1,723				258,159			5,806
Total commercial real estate	494,030			2,856				446,223			8,586
Consumer:
Home equity credit line	742			3				847			6
1-4 family residential	86,103			431				79,993			1,162
Construction and other consumer real estate	6,764			43				6,641			128
Bankcard and other revolving plans	287			—				128			—
Other	1,972			—				2,320			—
Total consumer loans	95,868			477				89,929			1,296
FDIC-supported loans	94,890			14,055			1	102,709			34,202			1
Total	$	1,008,923		$	18,776			$	937,433		$	48,208
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	'																					'													'
		Three Months Ended										Nine Months Ended											Three Months Ended						Nine Months Ended							September 30, 2013
		30-Sep-13										30-Sep-13											30-Sep-12						30-Sep-12							Recorded investment resulting from the following modification types:
	(In thousands)	Accruing			Nonaccruing				Total			Accruing				Nonaccruing		Total				(In thousands)	Accruing		Nonaccruing		Total		Accruing		Nonaccruing		Total		(In thousands)	Interest		Maturity		Principal		Payment		Other1		Multiple		Total
	Commercial:																					Commercial:														rate below		or term		forgiveness		deferral				modification
	Commercial and industrial	$	—		$	660			$	660		$	—			$	660	$	660			Commercial and industrial	$	—	$	107	$	107	$	—	$	1,441	$	1,441		market		extension								types2
																																			Accruing
	Owner occupied	—			—				—			—				511		511				Owner occupied	—		—		—		—		5,405		5,405		Commercial:
																																			Commercial and industrial	$	355	$	15,794	$	—	$	6,856	$	14,326	$	34,928	$	72,259
	Total commercial	—			660				660			—				1,171		1,171				Total commercial	—		107		107		—		6,846		6,846
																																			Owner occupied	22,121		4,768		994		2,961		10,145		19,866		60,855
	Commercial real estate:																					Commercial real estate:
	Construction and land development	—			—				—			—				—		—				Construction and land development	—		2,229		2,229		—		2,525		2,525		Total commercial	22,476		20,562		994		9,817		24,471		54,794		133,114
	Term	—			—				—			—				—		—				Term	—		—		—		—		—		—		Commercial real estate:
																																			Construction and land development	2,062		11,688		—		1,120		8,836		27,962		51,668
	Total commercial real estate	—			—				—			—				—		—				Total commercial real estate	—		2,229		2,229		—		2,525		2,525
																																			Term	34,482		9,516		5,331		5,766		22,405		58,945		136,445
	Consumer:																					Consumer:
	Home equity credit line	—			222				222			—				307		307				Home equity credit line					—						—		Total commercial real estate	36,544		21,204		5,331		6,886		31,241		86,907		188,113
	1-4 family residential	—			—				—			—				1,372		1,372				1-4 family residential	—		—		—		—		1,089		1,089		Consumer:
																																			Home equity credit line	743		—		8,922		—		325		335		10,325
	Total consumer loans	—			222				222			—				1,679		1,679				Total consumer loans	—		—		—		—		1,089		1,089
																																			1-4 family residential	2,649		1,294		7,861		647		4,482		33,613		50,546
	Total	$	—		$	882			$	882		$	—			$	2,850	$	2,850			Total	$	—	$	2,336	$	2,336	$	—	$	10,460	$	10,460
																																			Construction and other consumer real estate	133		963		—		—		144		1,455		2,695
																																			Other	—		—		—		—		—		—		—
																																			Total consumer loans	3,525		2,257		16,783		647		4,951		35,403		63,566
																																			Total accruing	62,545		44,023		23,108		17,350		60,663		177,104		384,793
																																			Nonaccruing
																																			Commercial:
																																			Commercial and industrial	2,609		8,958		68		156		1,362		13,416		26,569
																																			Owner occupied	3,096		1,471		1,074		3,823		11,182		12,944		33,590
																																			Total commercial	5,705		10,429		1,142		3,979		12,544		26,360		60,159
																																			Commercial real estate:
																																			Construction and land development	11,822		1,750		—		—		5,591		40,008		59,171
																																			Term	2,480		—		—		2,051		325		9,780		14,636
																																			Total commercial real estate	14,302		1,750		—		2,051		5,916		49,788		73,807
																																			Consumer:
																																			Home equity credit line	—		—		1,575		—		222		130		1,927
																																			1-4 family residential	4,455		1,420		1,787		—		4,440		16,353		28,455
																																			Construction and other consumer real estate	5		926		—		—		—		1,034		1,965
																																			Bankcard and other revolving plans	—		260		—		—		—		—		260
																																			Total consumer loans	4,460		2,606		3,362		—		4,662		17,517		32,607
																																			Total nonaccruing	24,467		14,785		4,504		6,030		23,122		93,665		166,573
																																			Total	$	87,012	$	58,808	$	27,612	$	23,380	$	83,785	$	270,769	$	551,366
																																				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	'																					'													'
	(In thousands)	Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013			2012				2013			2012
	Commercial:
	Commercial and industrial	$	(107	)	$	(134	)		$	(308	)	$	(157	)
	Owner occupied	(1,061		)	(309		)		(3,158		)	(1,012		)
	Total commercial	(1,168		)	(443		)		(3,466		)	(1,169		)
	Commercial real estate:
	Construction and land development	(237		)	(273		)		(755		)	(742		)
	Term	(2,134		)	(1,443		)		(7,285		)	(4,469		)
	Total commercial real estate	(2,371		)	(1,716		)		(8,040		)	(5,211		)
	Consumer:
	Home equity credit line	(24		)	(18		)		(97		)	(51		)
	1-4 family residential	(3,700		)	(4,204		)		(11,313		)	(12,045		)
	Construction and other consumer real estate	(106		)	(230		)		(324		)	(445		)
	Total consumer loans	(3,830		)	(4,452		)		(11,734		)	(12,541		)
	Total decrease to interest income1	$	(7,369	)	$	(6,611	)		$	(23,240	)	$	(18,921	)
	1Calculated based on the difference between the modified rate and the premodified rate applied to the recorded investment.
Schedule Of Outstanding Balances Of All Required Payments And The Related Carrying Amounts For PCI Loans	'																					'													'
	(In thousands)	September 30,			December 31,
		2013			2012
	Commercial	$	164,760		$	227,414
	Commercial real estate	254,507			382,068
	Consumer	31,675			41,398
	Outstanding balance	$	450,942		$	650,880
	Carrying amount	$	334,473		$	472,040
	ALLL	5,077			12,077
	Carrying amount, net	$	329,396		$	459,963
Schedule Of Changes In The Accretable Yield For PCI Loans	'																					'													'
	(In thousands)	Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013			2012				2013			2012
	Balance at beginning of period	$	104,483		$	157,040			$	134,461		$	184,679
	Accretion	(19,941		)	(25,409		)		(78,994		)	(69,824		)
	Reclassification from nonaccretable difference	7,908			9,565				31,092			25,112
	Disposals and other	3,308			3,550				9,199			4,779
	Balance at end of period	$	95,758		$	144,746			$	95,758		$	144,746
Schedule Of Changes In The FDIC Indemnification Asset	'																					'													'
	(In thousands)	Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013			2012				2013			2012
	Balance at beginning of period	$	51,297		$	117,167			$	90,929		$	133,810
	Amounts filed with the FDIC and collected or in process 1	5,507			3,904				15,267			15,106
	Net change in asset balance due to reestimation of projected cash flows 2	(15,033		)	(20,165		)		(64,425		)	(48,010		)
	Balance at end of period	$	41,771		$	100,906			$	41,771		$	100,906
	1	The FDIC’s reimbursement process requires that submitted expenses be paid, not just incurred, to qualify for reimbursement.
	2	Negative amounts result from the accretion of loan balances based on increases in cash flow estimates and on prepayments.

Derivative_Instruments_And_Hed1

Derivative Instruments And Hedging Activities Derivative Instruments and Hedging Activities (Tables)	9 Months Ended
	Sep. 30, 2013
Summary of Derivative Instruments [Abstract]	'
Schedule of Derivative Instruments	'
		September 30, 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
	Asset derivatives
	Cash flow hedges:
	Interest rate swaps	$	75,000	$	411	$	—		$	150,000	$	1,188	$	—
	Total derivatives designated as hedging instruments	75,000		411		—			150,000		1,188		—
	Derivatives not designated as hedging instruments
	Interest rate swaps	65,850		517		565			98,524		1,043		1,047
	Interest rate swaps for customers 2	2,728,601		54,640		55,110			2,607,603		79,579		82,926
	Total return swap	1,159,686		—		4,239			1,159,686		—		5,127
	Total derivatives not designated as hedging instruments	3,954,137		55,157		59,914			3,865,813		80,622		89,100
	Total derivatives	$	4,029,137	$	55,568	$	59,914		$	4,015,813	$	81,810	$	89,100
Schedule Of Gain (Loss) Of Derivative Instruments	'
		Three Months Ended September 30, 2013									Nine Months Ended September 30, 2013
		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 3									income 3
	Derivatives designated as hedging instruments
	Asset derivatives
	Cash flow hedges 1:
	Interest rate swaps	$	414	$	97	$	—				$	408	$	2,479	$	—
		414		97		—					408		2,479		—
	Liability derivatives
	Fair value hedges:
	Terminated swaps on long-term debt								$	796								$	2,342
	Total derivatives designated as hedging instruments	414		97		—			796		408		2,479		—			2,342
	Derivatives not designated as hedging instruments
	Interest rate swaps					765									678
	Interest rate swaps for customers 2					883									6,631
	Futures contracts					2									2
	Total return swap					(5,342		)							(16,350		)
	Total derivatives not designated as hedging instruments					(3,692		)							(9,039		)
	Total derivatives	$	414	$	97	$	(3,692	)	$	796	$	408	$	2,479	$	(9,039	)	$	2,342
		Three Months Ended September 30, 2012									Nine Months Ended September 30, 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 3									income 3
	Derivatives designated as hedging instruments
	Asset derivatives
	Cash flow hedges 1:
	Interest rate swaps	$	84	$	2,378	$	—				$	390	$	10,871	$	—
		84		2,378		—					390		10,871		—
	Liability derivatives
	Fair value hedges:
	Terminated swaps on long-term debt								$	771								2,277
	Total derivatives designated as hedging instruments	84		2,378		—			771		390		10,871		—			2,277
	Derivatives not designated as hedging instruments
	Interest rate swaps					(174		)							(302		)
	Interest rate swaps for customers 2					1,331									1,917
	Basis swaps					—									18
	Futures contracts					(2		)							(12		)
	Total return swap					(5,403		)							(16,303		)
	Total derivatives not designated as hedging instruments					(4,248		)							(14,682		)
	Total derivatives	$	84	$	2,378	$	(4,248	)	$	771	$	390	$	10,871	$	(14,682	)	$	2,277
	Note: These tables 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 accumulated OCI (“AOCI”) represent the effective portion of the derivative gain (loss).
	2	Amounts include both the customer swaps and the offsetting derivative contracts.
	3 Amounts for the three and nine months ended September 30 of $0.1 million and $2.5 million in 2013, and $2.4 million and $10.9 million in 2012, respectively, are the amounts of reclassification to earnings from AOCI presented in Note 7.

Debt_And_Shareholders_Equity_T

Debt And Shareholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	'
		Amounts reclassified from AOCI 1														Statement of income (SI) Balance sheet
	(In thousands)	Three Months Ended September 30,								Nine Months Ended September 30,						(BS)
	Details about AOCI components	2013				2012				2013			2012					Affected line item
	Net realized gains on investment securities	$	1,580			$	3,046			$	3,726		$	9,285		SI		Fixed income securities gains, net
	Income tax expense	604				1,165				1,425			3,417
		976				1,881				2,301			5,868
	Net unrealized losses on investment	(9,067		)		(2,736		)		(22,999		)	(19,912		)	SI		Net impairment losses on investment securities
	securities
	Income tax benefit	(3,479		)		(1,046		)		(8,863		)	(7,616		)
		(5,588		)		(1,690		)		(14,136		)	(12,296		)
	Accretion of securities with noncredit-related impairment losses not expected to be sold	(496		)		(315		)		(1,477		)	(1,196		)	BS		Investment securities, held-to-maturity
	Deferred income taxes	(211		)		123				(597		)	472			BS		Other assets
		$	(5,319	)		$	(1	)		$	(13,909	)	$	(7,152	)
	Net unrealized gains on derivative instruments	$	97			$	2,378			$	2,479		$	10,871		SI		Interest and fees on loans
	Income tax expense	40				957				996			4,317
		$	57			$	1,421			$	1,483		$	6,554
Schedule Of Changes In Accumulated Other Comprehensive Income (Loss)	'
	(In thousands)	Net unrealized gains (losses) on investment securities						Net unrealized gains (losses) on derivative instruments					Pension and post-retirement			Total
	Nine Months Ended September 30, 2013
	Balance at December 31, 2012		$	(397,616	)				$	1,794			$	(50,335	)	$	(446,157	)
	Other comprehensive income before reclassifications, net of tax		48,992						236				—			49,228
	Amounts reclassified from AOCI, net of tax		13,909						(1,483		)		—			12,426
	Other comprehensive income (loss)		62,901						(1,247		)		—			61,654
	Balance at September 30, 2013		$	(334,715	)				$	547			$	(50,335	)	$	(384,503	)
	Nine Months Ended September 30, 2012
	Balance at December 31, 2011		$	(546,763	)				$	9,404			$	(54,725	)	$	(592,084	)
	Other comprehensive income before reclassifications, net of tax		56,523						225				—			56,748
	Amounts reclassified from AOCI, net of tax		7,152						(6,554		)		—			598
	Other comprehensive income (loss)		63,675						(6,329		)		—			57,346
	Balance at September 30, 2012		$	(483,088	)				$	3,075			$	(54,725	)	$	(534,738	)

Fair_Value_Tables

Fair Value (Tables)	9 Months Ended																													12 Months Ended
	Sep. 30, 2013																													Dec. 31, 2012
Fair Value Disclosures [Abstract]	'																													'
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis	'																													'
	(In thousands)	September 30, 2013
		Level 1				Level 2			Level 3				Total
	ASSETS
	Investment securities:
	Available-for-sale:
	U.S. Treasury, agencies and corporations	$	38,498			$	1,929,039						$	1,967,537
	Municipal securities					51,649			$	13,520			65,169
	Asset-backed securities:
	Trust preferred – banks and insurance								1,001,896				1,001,896
	Trust preferred – real estate investment trusts								19,517				19,517
	Auction rate								6,625				6,625
	Other (including ABS CDOs)					2,567			13,547				16,114
	Mutual funds and stock	251,382				5,649							257,031
		289,880				1,988,904			1,055,105				3,333,889
	Trading account					38,278							38,278
	Other noninterest-bearing investments:
	Bank-owned life insurance					464,180							464,180
	Private equity					4,992			77,556				82,548
	Other assets:
	Derivatives:
	Interest rate related and other					1,067							1,067
	Interest rate swaps for customers					54,640							54,640
	Foreign currency exchange contracts	9,887											9,887
		9,887				55,707							65,594
		$	299,767			$	2,552,061		$	1,132,661			$	3,984,489
	LIABILITIES
	Securities sold, not yet purchased	$	21,183										$	21,183
	Other liabilities:
	Derivatives:
	Interest rate related and other					$	861						861
	Interest rate swaps for customers					55,110							55,110
	Foreign currency exchange contracts	8,703											8,703
	Total return swap								$	4,239			4,239
		8,703				55,971			4,239				68,913
	Other								197				197
		$	29,886			$	55,971		$	4,436			$	90,293
	(In thousands)	December 31, 2012
		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 stock	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 Key Model Inputs And Assumptions Used To Fair Value Certain Asset-Backed Securities	'																													'
	(Dollars in thousands)	Fair value at September 30, 2013				Valuation		Constant default	Loss		Prepayment rate
						approach		rate (“CDR”)	severity
	Asset-backed securities:
	Trust preferred – predominantly banks	$	857,021			Income		Pool specific 3	100%		Pool specific 7
	Trust preferred – predominantly insurance	273,420				Income		Pool specific 4	100%		5% per year
	Trust preferred – individual banks	23,002				Market
		1,153,443			1
	Trust preferred – real estate investment trusts	19,518				Income		Pool specific 5	60-100%		0% per year
	Other (including ABS CDOs)	25,197			2	Income		Collateral specific 6	70-100%		Collateral weighted
											average life
	1 Includes $1,001.9 million of AFS securities and $151.5 million of HTM securities.
	2 Includes $13.5 million of AFS securities and $11.7 million of HTM securities.
	3 CDR ranges: yr 1 – 0.30% to 3.52%; yrs 2-5 – 0.47% to 1.05%; yrs 6 to maturity – 0.59% to 0.67%.
	4 CDR ranges: yr 1 – 0.30% to 0.34%; yrs 2-5 – 0.48% to 0.58%; yrs 6 to maturity – 0.50% to 0.54%.
	5 CDR ranges: yr 1 – 4.3% to 7.8%; yrs 2-3 – 5.0% to 5.5%; yrs 4-6 – 1.0%; yrs 6 to maturity – 0.50%.
	6 These are predominantly ABS CDOs whose collateral is rated. CDR and loss severities are built up from the loan level and vary by collateral ratings, asset class, and vintage.
	7 Constant Prepayment Rate (“CPR”) ranges: 7.50% to 21.69% annually until 2016; 2016 to maturity – 3.0% annually.
Schedule Of Fair Value Of Predominantly Bank Trust Preferred CDOs	'																													'
	(Dollars in thousands)
			Fair value at September 30, 2013				Percentage of total fair value								Percentage of total fair value by vintage
	Vintage						according to original rating
	year						AAA		A			BBB
	2001		$	36,497			3.1	%	1.1	%		—	%			4.2	%
	2002		200,837				20.8		2.6			—				23.4
	2003		326,412				23.2		14.9			0.1				38.2
	2004		179,677				8.3		12.7			—				21
	2005		15,816				1.1		0.7			—				1.8
	2006		60,465				2.9		3.7			0.4				7
	2007		37,317				4.4		—			—				4.4
			$	857,021			63.8	%	35.7	%		0.5	%			100	%
Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs	'																													'
		Level 3 Instruments
		Three Months Ended September 30, 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 June 30, 2013	$	13,544			$	1,030,293		$	18,499			$	6,554			$	17,324			$	75,517		$	(4,829	)	$	(289	)
	Total net gains (losses) included in:
	Statement of income:
	Accretion of purchase discount on securities available-for-sale	10				783			64				1				50
	Dividends and other investment income																				306
	Fair value and nonhedge derivative loss																							(5,342		)
	Equity securities gains, net
	Fixed income securities gains, net	2				1,494											10
	Net impairment losses on investment securities					(7,787		)	(1,112		)						(168		)
	Other noninterest expense																										92
	Other comprehensive income	64				(3,934		)	2,067				70				(476		)
	Purchases																				2,064
	Sales																				(249		)
	Redemptions and paydowns	(100		)		(18,954		)									(3,193		)		(82		)	5,932
	Balance at September 30, 2013	$	13,520			$	1,001,895		$	19,518			$	6,625			$	13,547			$	77,556		$	(4,239	)	$	(197	)
		Level 3 Instruments
		Nine Months Ended September 30, 2013
	(In thousands)	Municipal				Trust			Trust				Auction				Other				Private			Derivatives			Other
		securities				preferred – banks and insurance			preferred – REIT				rate				asset-backed				equity						liabilities
																					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	31				2,395			190				2				64
	Dividends and other investment income																				5,455
	Fair value and nonhedge derivative loss																							(16,350		)
	Equity securities gains, net																				3,739
	Fixed income securities gains, net	38				3,530											54
	Net impairment losses on investment securities					(21,548		)	(1,282		)						(168		)
	Other noninterest expense																										(73		)
	Other comprehensive income	986				127,028			4,207				108				4,147
	Purchases																				5,905
	Sales					(7,015		)													(1,369		)
	Redemptions and paydowns	(4,086		)		(51,766		)									(5,710		)		(397		)	17,238
	Balance at September 30, 2013	$	13,520			$	1,001,895		$	19,518			$	6,625			$	13,547			$	77,556		$	(4,239	)	$	(197	)
		Level 3 Instruments
		Three Months Ended September 30, 2012
	(In thousands)	Municipal				Trust			Trust				Auction				Other				Private			Derivatives			Other
		securities				preferred – banks and insurance			preferred – REIT				rate				asset-backed				equity						liabilities
																					investments
	Balance at June 30, 2012	$	16,360			$	926,450		$	14,431			$	7,166			$	40,666			$	65,370		$	(5,337	)	$	(121	)
	Total net gains (losses) included in:
	Statement of income:
	Accretion of purchase discount on securities available-for-sale	18				1,239			61				1				53
	Dividends and other investment income																				3,562
	Fair value and nonhedge derivative loss																							(5,403		)
	Equity securities losses, net																				2,556
	Fixed income securities gains, net	9				3,004											11
	Net impairment losses on investment securities					(2,079		)
	Other noninterest expense																										(7		)
	Other comprehensive income (loss)	136				55,962			915				(4		)		2,418
	Purchases																				2,803
	Sales																				(1,126		)
	Redemptions and paydowns	(200		)		(19,472		)					(50		)		(2,994		)		(1,271		)	5,692
	Balance at September 30, 2012	$	16,323			$	965,104		$	15,407			$	7,113			$	40,154			$	71,894		$	(5,048	)	$	(128	)
		Level 3 Instruments
		Nine Months Ended September 30, 2012
	(In thousands)	Municipal				Trust			Trust				Auction				Other				Private			Derivatives			Other
securities			preferred – banks and insurance			preferred – REIT			rate				asset-backed				equity				liabilities
																	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	82				6,267			162				3				213
Dividends and other investment income																				9,167
Fair value and nonhedge derivative loss																							(16,303		)
Equity securities losses, net																				11,629
Fixed income securities gains, (losses), net	9				10,780							4,134				(5,762		)
Net impairment losses on investment securities					(19,255		)
Other noninterest expense																										(42		)
Other comprehensive income (loss)	(499		)		89,695			(3,400		)		1,331				8,301
Purchases																				7,687
Sales																				(6,478		)
Redemptions and paydowns	(650		)		(51,739		)					(68,375		)		(6,144		)		(12,438		)	16,677
Balance at September 30, 2012	$	16,323			$	965,104		$	15,407			$	7,113			$	40,154			$	71,894		$	(5,048	)	$	(128	)
Schedule Of Realized Gains (Losses) Using Level 3 Inputs	'																													'
	(In thousands)	Three Months Ended September 30,							Nine Months Ended September 30,
		2013				2012			2013				2012
	Dividends and other investment income (loss)	$	—			$	—		$	(45	)		$	—
	Fixed income securities gains, net	1,506				3,024			3,622				9,161
	Equity securities gains, net	—				—			—				10,359
Schedule Of Assets With Fair Value Changes On Nonrecurring Basis	'																													'
	(In thousands)	Fair value at September 30, 2013															Fair value at December 31, 2012
		Level 1				Level 2			Level 3				Total				Level 1				Level 2			Level 3			Total
	ASSETS
	HTM securities adjusted for OTTI	$	—			$	—		$	8,483			$	8,483			$	—			$	—		$	23,524		$	23,524
	Impaired loans	—				4,164			—				4,164				—				3,789			—			3,789
	Private equity investments, carried at cost	—				—			8,313				8,313				—				—			13,522			13,522
	Other real estate owned	—				46,700			—				46,700				—				58,954			—			58,954
		$	—			$	50,864		$	16,796			$	67,660			$	—			$	62,743		$	37,046		$	99,789
	The previous fair values may not be current as of the dates indicated, but rather as of the date the fair value change occurred, such as a charge for impairment. Carrying values may not equal current fair value.
		Gains (losses) from fair value changes
	(In thousands)	Three Months Ended							Nine Months Ended
		September 30,							September 30,
		2013				2012			2013				2012
	ASSETS
	HTM securities adjusted for OTTI	$	—			$	(657	)	$	(403	)		$	(998	)
	Impaired loans	(35		)		(818		)	(1,463		)		(3,859		)
	Private equity investments, carried at cost	(2,826		)		(93		)	(4,254		)		(1,845		)
	Other real estate owned	(1,749		)		(5,499		)	(8,217		)		(14,707		)
		$	(4,610	)		$	(7,067	)	$	(14,337	)		$	(21,409	)
Fair Value, by Balance Sheet Grouping [Table Text Block]	'																													'
			September 30, 2013																												December 31, 2012
	(In thousands)													Gross amounts not offset in the balance sheet																(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								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:																													Assets:
	Federal funds sold and security resell agreements		$	209,070			$	—		$	209,070			$	—			$	—			$	209,070							Federal funds sold and security resell agreements	$	3,675,354	$	(900,000	)	$	2,775,354	$	—		$	—		$	2,775,354
	Derivatives (included in other assets)		55,568				—			55,568				(8,282		)		—				47,286								Derivatives (included in other assets)	81,810		—			81,810		(409		)	—			81,401
			$	264,638			$	—		$	264,638			$	(8,282	)		$	—			$	256,356								$	3,757,164	$	(900,000	)	$	2,857,164	$	(409	)	$	—		$	2,856,755
	Liabilities:																													Liabilities:
	Federal funds purchased and security repurchase agreements		$	252,591			$	—		$	252,591			$	—			$	—			$	252,591							Federal funds purchased and security repurchase agreements	$	1,220,478	$	(900,000	)	$	320,478	$	—		$	—		$	320,478
	Derivatives (included in other liabilities)		59,914				—			59,914				(8,282		)		(37,232		)		14,400								Derivatives (included in other liabilities)	89,100		—			89,100		(409		)	(81,683		)	7,008
			$	312,505			$	—		$	312,505			$	(8,282	)		$	(37,232	)		$	266,991								$	1,309,578	$	(900,000	)	$	409,578	$	(409	)	$	(81,683	)	$	327,486
		September 30, 2013							December 31, 2012
	(In thousands)	Carrying				Estimated			Carrying				Estimated
		value				fair value			value				fair value
	Financial assets:
	HTM investment securities	$	777,849			$	727,908		$	756,909			$	674,741
	Loans and leases (including loans held for sale), net of allowance	37,590,017				37,402,157			37,020,811				37,024,198
	Financial liabilities:
	Time deposits	2,689,688				2,703,085			2,962,931				2,988,714
	Foreign deposits	1,607,409				1,607,052			1,804,060				1,803,625
	Other short-term borrowings	—				—			5,409				5,421
	Long-term debt (less fair value hedges)	2,298,853				2,529,021			2,329,323				2,636,422

Commitments_Guarantees_And_Con1

Commitments, Guarantees, And Contingent Liabilities (Tables)	9 Months Ended
	Sep. 30, 2013
Guarantees, Commitments And Contingencies [Abstract]	'
Schedule Of Guarantees Issued	'
	(In thousands)	September 30,		December 31,
		2013		2012
	Unfunded commitments to extend credit	$	15,561,565	$	14,277,347
	Standby letters of credit:
	Financial	812,493		774,427
	Performance	179,108		190,029
	Commercial letters of credit	62,832		91,978
	Total unfunded lending commitments	$	16,615,998	$	15,333,781

Retirement_Plans_Tables

Retirement Plans (Tables)	9 Months Ended
	Sep. 30, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]	'
Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans	'
		Pension benefits						Supplemental					Postretirement						Pension benefits						Supplemental					Postretirement
								retirement					benefits												retirement					benefits
								benefits																	benefits
	(In thousands)	Three Months Ended September 30,																	Nine Months Ended September 30,
		2013			2012			2013		2012			2013			2012			2013			2012			2013		2012			2013			2012
	Service cost	$	—		$	(3	)	$	—	$	—		$	8		$	9		$	—		$	22		$	—	$	—		$	24		$	27
	Interest cost	1,721			1,885			101		115			10			12			5,164			5,669			303		345			31			35
	Expected return on plan assets	(3,027		)	(2,827		)												(9,082		)	(8,481		)
	Amortization of prior service							31		31			(37		)	(61		)							93		93			(113		)	(183		)
	cost (credit)
	Amortization of net actuarial	2,033			2,198			17		(28		)	(19		)	(22		)	6,099			6,889			52		(85		)	(56		)	(65		)
	(gain) loss
	Net periodic benefit cost (credit)	$	727		$	1,253		$	149	$	118		$	(38	)	$	(62	)	$	2,181		$	4,099		$	448	$	353		$	(114	)	$	(186	)

Operating_Segment_Information_

Operating Segment Information (Tables)	9 Months Ended
	Sep. 30, 2013
Operating Segment Information [Abstract]	'
Schedule of Segment Reporting Information, by Segment	'
	(In millions)	Zions Bank						CB&T						Amegy						NBAZ						NSB
		2013			2012			2013			2012			2013			2012			2013			2012			2013		2012
	CONDENSED INCOME STATEMENT
	Net interest income	$	145.1		$	165		$	109.8		$	118		$	95.5		$	91.6		$	40.5		$	41.9		$	28.4	$	30.4
	Provision for loan losses	(9.5		)	17.1			(3.0		)	(2.8		)	12.8			(18.3		)	(7.3		)	1.7			—		(1.2		)
	Net interest income after provision for loan losses	154.6			147.9			112.8			120.8			82.7			109.9			47.8			40.2			28.4		31.6
	Net impairment losses on investment securities	—			(0.1		)	—			—			—			—			—			—			—		—
	Loss on sale of investment securities to Parent	—			—			—			—			—			—			—			—			—		—
	Other noninterest income	47.7			52.1			20.8			19.3			37.1			38.3			8.6			7.6			11.4		8.8
	Noninterest expense	119.1			123.5			75.9			85.2			75.3			86.3			35.3			37.3			32		31.3
	Income (loss) before income taxes	83.2			76.4			57.7			54.9			44.5			61.9			21.1			10.5			7.8		9.1
	Income tax expense (benefit)	30.2			27.4			23			21.8			14.9			20.8			7.7			3.4			2.6		3.1
	Net income (loss)	$	53		$	49		$	34.7		$	33.1		$	29.6		$	41.1		$	13.4		$	7.1		$	5.2	$	6
	AVERAGE BALANCE SHEET DATA
	Total assets	$	18,237		$	17,641		$	10,869		$	11,000		$	13,453		$	12,231		$	4,624		$	4,447		$	4,022	$	4,085
	Cash and due from banks	339			359			164			168			255			259			70			70			87		83
	Money market investments	3,868			2,725			1,288			1,296			2,823			2,446			444			482			883		936
	Total securities	1,287			1,331			321			362			285			313			320			274			785		774
	Total loans	12,271			12,566			8,328			8,332			8,981			8,073			3,600			3,402			2,158		2,156
	Total deposits	15,951			15,140			9,261			9,404			11,024			9,805			3,945			3,766			3,600		3,597
	Shareholder’s equity:
	Preferred equity	280			444			162			184			248			330			153			198			90		180
	Common equity	1,530			1,441			1,326			1,307			1,805			1,689			410			379			310		286
	Noncontrolling interests	—			—			—			—			—			—			—			—			—		—
	Total shareholder’s equity	1,810			1,885			1,488			1,491			2,053			2,019			563			577			400		466
		Vectra						TCBW						Other						Consolidated
																				Company
		2013			2012			2013			2012			2013			2012			2013			2012
	CONDENSED INCOME STATEMENT
	Net interest income	$	25.8		$	27.3		$	7		$	6.9		$	(36.6	)	$	(42.9	)	$	415.5		$	438.2
	Provision for loan losses	1.8			2.2			(0.3		)	(0.6		)	(0.1		)	—			(5.6		)	(1.9		)
	Net interest income after provision for loan losses	24			25.1			7.3			7.5			(36.5		)	(42.9		)	421.1			440.1
	Net impairment losses on investment securities	—			—			—			—			(9.1		)	(2.7		)	(9.1		)	(2.8		)
	Loss on sale of investment	—			—			(2.7		)	—			2.7			—			—			—
	securities to Parent
	Other noninterest income	6.5			7.6			1			1			(1.8		)	(6.7		)	131.3			128
	Noninterest expense	24.4			23.4			4.8			4.9			3.9			3.1			370.7			395
	Income (loss) before income taxes	6.1			9.3			0.8			3.6			(48.6		)	(55.4		)	172.6			170.3
	Income tax expense (benefit)	2.1			3.2			0.3			1.2			(19.7		)	(20.2		)	61.1			60.7
	Net income (loss)	$	4		$	6.1		$	0.5		$	2.4		$	(28.9	)	$	(35.2	)	$	111.5		$	109.6
	AVERAGE BALANCE SHEET DATA
	Total assets	$	2,630		$	2,441		$	882		$	863		$	798		$	659		$	55,515		$	53,367
	Cash and due from banks	48			54			19			20			(6		)	(13		)	976			1,000
	Money market investments	127			47			121			158			(100		)	(100		)	9,454			7,990
	Total securities	184			207			101			115			592			449			3,875			3,825
	Total loans	2,195			2,046			627			556			64			68			38,224			37,199
	Total deposits	2,258			2,085			743			722			(1,194		)	(1,041		)	45,588			43,478
	Shareholder’s equity:
	Preferred equity	70			70			3			2			680			357			1,686			1,765
	Common equity	241			214			86			80			(518		)	(637		)	5,190			4,759
	Noncontrolling interests	—			—			—			—			—			(3		)	—			(3		)
	Total shareholder’s equity	311			284			89			82			162			(283		)	6,876			6,521

Basis_of_Presentaion_Details

Basis of Presentaion (Details)	Sep. 30, 2013
	States
Basis Of Presentation [Abstract]	'
Number of States in which Entity Operates	10

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information (Schedule Of Noncash Activities) (Details) (USD $)	3 Months Ended			9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2009	Sep. 30, 2013	Sep. 30, 2012
Other Significant Noncash Transactions [Line Items]	'	'	'	'	'
Loans Transfered to Other Real Estate Owned	$12,098	$37,140	'	$52,916	$141,439
Beneficial Conversion Feature Transferred From Common Stock to Preferred Stock as a Result of Subordinated Debt Conversions	0	917	203,000	206	14,519
Subordinated debt converted to preferred stock	0	5,386	'	1,210	85,352
Preferred Stock Transferred To Common Stock As A Aresult Of The Series C Preferred Stock Redemption	580	0	'	580	0
Preferred Stock/Beneficial Conversion Feature Transferred To Retained Earnings As A Result Of The Series C Preferred Stock Redemption	$125,700	$0	'	$125,700	$0

Cash_and_Money_Market_Investme2

Cash and Money Market Investments Cash and Money Market Investments (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Derivative Liability, Fair Value, Gross Liability	$59,914	$89,100
Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	209,070	3,675,354
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	209,070	2,775,354
Net amount	209,070	2,775,354
Assets, Total [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	264,638	3,757,164
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	264,638	2,857,164
Net amount	256,356	2,856,755
Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	252,591	1,220,478
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	252,591	320,478
Net amount	252,591	320,478
Liabilities, Total [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	312,505	1,309,578
Gross amounts offset in the balance sheet	0	-900,000
Net amounts presented in the balance sheet	312,505	409,578
Net amount	266,991	327,486
Derivative Assets Included In Other Assets [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts recognized	55,568	81,810
Gross amounts offset in the balance sheet	0	0
Net amounts presented in the balance sheet	55,568	81,810
Net amount	47,286	81,401
Derivative Liabilities Offsets In Other Assets-Offset [Member] | 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	59,914	89,100
Net amount	14,400	7,008
Derivative Liability, Fair Value, Gross Liability	59,914	89,100
Cash collateral received/pledged [Domain] | Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Cash collateral received/pledged [Domain] | Assets, Total [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Cash collateral received/pledged [Domain] | Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Cash collateral received/pledged [Domain] | Liabilities, Total [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-37,232	-81,683
Cash collateral received/pledged [Domain] | Derivative Assets Included In Other Assets [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Cash collateral received/pledged [Domain] | Derivative Liabilities Offsets In Other Assets-Offset [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-37,232	-81,683
Types of Financial Instruments [Domain] | Federal Funds Sold and Securities Borrowed or Purchased under Agreements to Resell [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Types of Financial Instruments [Domain] | Assets, Total [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-8,282	-409
Types of Financial Instruments [Domain] | Federal Funds Purchased and Securities Sold under Agreements to Repurchase [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	0	0
Types of Financial Instruments [Domain] | Liabilities, Total [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-8,282	-409
Types of Financial Instruments [Domain] | Derivative Assets Included In Other Assets [Member] | Assets [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	-8,282	-409
Types of Financial Instruments [Domain] | Derivative Liabilities Offsets In Other Assets-Offset [Member] | Other Liabilities [Member]	'	'
Gain (Loss) on Investments [Line Items]	'	'
Gross amounts not offset in the balance sheet	($8,282)	($409)

Investment_Securities_Narrativ

Investment Securities (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
	Organizaion		Securities		Securities
	Securities		Banks
	Banks
Investment [Line Items]	'	'	'	'	'
Number of HTM investment securities in an unrealized loss position	207	'	207	'	84
Number of AFS investment securities in an unrealized loss position	258	'	258	'	256
Number of banks in CDO pools current following deferral period	107	'	107	'	'
Number of banks in CDO pools remaining in deferral	158	'	158	'	'
Number of NRSRO Ratings	1	'	'	'	'
Nontaxable interest income on securities	$3,400,000	$4,200,000	$10,100,000	$13,700,000	'
Carrying value of pledged securities	$1,500,000,000	'	$1,500,000,000	'	'
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	'	'

Investment_Securities_Summary_

Investment Securities (Summary Of Investment Securities) (Details) (USD $)	0 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Investment [Line Items]	'	'	'
Held-to-maturity, fair value	$727,908	'	$674,741
Held-to-maturity, Amortized cost	834,454	'	802,343
Held To Maturity Securities Gross Unrealized Gains	0	'	'
Held To Maturity Securities Gross Unrealized Gains Losses 1	'	'	0
Held To Maturity Securities Gross Unrealized Losses	56,605	'	'
Held To Maturity Securities Gross Unrealized Losses 1	'	'	45,434
Held-to-maturity, Carrying value	777,849	'	756,909
Available-for-sale debt securities, Amortized cost	3,578,968	'	'
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	58,145	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	560,255	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	3,076,858	'	'
Available-for-sale debt securities, Estimated fair value	3,076,858	'	2,863,299
Available-for-sale Securities, Gross Unrealized Gain	58,327	'	72,296
Available-for-sale equity securities, Amortized cost	'	'	3,488,480
Gross Unrealized Gains on Debt Securities	'	'	72,102
Gross Unrealized Losses on AFS Debt Securities	'	'	697,283
Available-for-sale equity securities, Carrying value	'	'	2,863,299
Available-for-sale, Amortized cost	3,841,461	'	3,716,949
Available-for-sale, Gross unrealized losses, Recognized in OCI	565,899	'	697,935
Carrying value	3,333,889	'	3,091,310
Available-for-sale securities, Estimated fair value	3,333,889	'	3,091,310
Held-to-maturity Securities, Unrecognized Holding Gain	'	18,316	13,660
Held-to-maturity Securities, Unrecognized Holding Loss	'	68,257	95,828
amortized cost of investment securities	4,675,915	'	4,519,292
Gross Unrealized Gains of Investment Securities Recognized in OCI	58,327	'	72,296
Gross Unrealized Losses of Investment Securities Recognized in OCI	622,504	'	743,369
Carrying Value of Investment Securities	4,111,738	'	3,848,219
Estimated Fair Value of Investment Securities	4,061,797	'	3,766,051
Municipal Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Held-to-maturity, fair value	564,610	'	536,866
Held-to-maturity, Amortized cost	558,134	'	524,738
Held To Maturity Securities Gross Unrealized Gains	0	'	'
Held To Maturity Securities Gross Unrealized Gains Losses 1	'	'	0
Held To Maturity Securities Gross Unrealized Losses	0	'	'
Held To Maturity Securities Gross Unrealized Losses 1	'	'	0
Held-to-maturity, Carrying value	558,134	'	524,738
Available-for-sale debt securities, Amortized cost	64,694	'	75,344
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	1,509	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	1,034	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	65,169	'	75,996
Available-for-sale debt securities, Estimated fair value	65,169	'	75,996
Available-for-sale Securities, Gross Unrealized Gain	'	'	2,622
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	1,970
Held-to-maturity Securities, Unrecognized Holding Gain	'	11,537	12,837
Held-to-maturity Securities, Unrecognized Holding Loss	'	5,061	709
Trust Preferred Securities - Banks And Insurance [Member] | Asset-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Held-to-maturity, fair value	151,548	'	126,201
Held-to-maturity, Amortized cost	255,159	'	255,647
Held To Maturity Securities Gross Unrealized Gains	0	'	'
Held To Maturity Securities Gross Unrealized Gains Losses 1	'	'	0
Held To Maturity Securities Gross Unrealized Losses	54,432	'	'
Held To Maturity Securities Gross Unrealized Losses 1	'	'	42,964
Held-to-maturity, Carrying value	200,727	'	212,683
Available-for-sale debt securities, Amortized cost	1,521,628	'	'
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	14,391	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	534,123	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	1,001,896	'	'
Available-for-sale debt securities, Estimated fair value	1,001,896	'	'
Available-for-sale Securities, Gross Unrealized Gain	'	'	16,687
Available-for-sale equity securities, Amortized cost	'	'	1,596,156
Available-for-sale equity securities, Carrying value	'	'	949,392
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	663,451
Available-for-sale securities, Estimated fair value	'	'	949,392
Held-to-maturity Securities, Unrecognized Holding Gain	'	5,879	114
Held-to-maturity Securities, Unrecognized Holding Loss	'	55,058	86,596
Other [Member] | Asset-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Held-to-maturity, fair value	11,650	'	11,574
Held-to-maturity, Amortized cost	21,061	'	21,858
Held To Maturity Securities Gross Unrealized Gains	0	'	'
Held To Maturity Securities Gross Unrealized Gains Losses 1	'	'	0
Held To Maturity Securities Gross Unrealized Losses	2,173	'	'
Held To Maturity Securities Gross Unrealized Losses 1	'	'	2,470
Held-to-maturity, Carrying value	18,888	'	19,388
Available-for-sale debt securities, Amortized cost	18,496	'	'
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	406	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	2,788	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	16,114	'	'
Available-for-sale debt securities, Estimated fair value	16,114	'	'
Available-for-sale Securities, Gross Unrealized Gain	'	'	701
Available-for-sale equity securities, Amortized cost	'	'	25,614
Available-for-sale equity securities, Carrying value	'	'	19,374
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	6,941
Available-for-sale securities, Estimated fair value	'	'	19,374
Held-to-maturity Securities, Unrecognized Holding Gain	'	900	709
Held-to-maturity Securities, Unrecognized Holding Loss	'	8,138	8,523
Other Debt Securities [Member] | Asset-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Held-to-maturity, fair value	100	'	100
Held-to-maturity, Amortized cost	100	'	100
Held To Maturity Securities Gross Unrealized Gains	0	'	'
Held To Maturity Securities Gross Unrealized Gains Losses 1	'	'	0
Held To Maturity Securities Gross Unrealized Losses	0	'	'
Held To Maturity Securities Gross Unrealized Losses 1	'	'	0
Held-to-maturity, Carrying value	100	'	100
Held-to-maturity Securities, Unrecognized Holding Gain	'	0	0
Held-to-maturity Securities, Unrecognized Holding Loss	'	0	0
U.S. Treasury Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale debt securities, Amortized cost	39,908	'	104,313
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	136	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	0	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	40,044	'	104,524
Available-for-sale debt securities, Estimated fair value	40,044	'	104,524
Available-for-sale Securities, Gross Unrealized Gain	'	'	211
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	0
Agency Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale debt securities, Amortized cost	440,170	'	108,814
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	2,120	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	197	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	442,093	'	112,657
Available-for-sale debt securities, Estimated fair value	442,093	'	112,657
Available-for-sale Securities, Gross Unrealized Gain	'	'	3,959
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	116
Agency Guaranteed Mortgage-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale debt securities, Amortized cost	308,964	'	406,928
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	11,619	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	609	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	319,974	'	425,510
Available-for-sale debt securities, Estimated fair value	319,974	'	425,510
Available-for-sale Securities, Gross Unrealized Gain	'	'	18,598
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	16
Small Business Administration Loan-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale debt securities, Amortized cost	1,139,211	'	1,124,322
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	27,829	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	1,614	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	1,165,426	'	1,152,928
Available-for-sale debt securities, Estimated fair value	1,165,426	'	1,152,928
Available-for-sale Securities, Gross Unrealized Gain	'	'	29,245
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	639
Trust Preferred Securities - Real Estate Investment Trusts [Member] | Asset-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale debt securities, Amortized cost	39,391	'	'
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	0	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	19,874	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	19,517	'	'
Available-for-sale debt securities, Estimated fair value	19,517	'	'
Available-for-sale Securities, Gross Unrealized Gain	'	'	0
Available-for-sale equity securities, Amortized cost	'	'	40,485
Available-for-sale equity securities, Carrying value	'	'	16,403
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	24,082
Available-for-sale securities, Estimated fair value	'	'	16,403
Auction Rate Securities [Member] | Asset-Backed Securities [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale debt securities, Amortized cost	6,506	'	'
Available-For-Sale Debt Securities, Gross Unrealized Gains, Recognized In O C I	135	'	'
Available-For-Sale Debt Securities, Gross Unrealized Losses, Recognized In O C I	16	'	'
Available-For-Sale Securities, Debt Securities, Net Carrying Amount	6,625	'	'
Available-for-sale debt securities, Estimated fair value	6,625	'	'
Available-for-sale Securities, Gross Unrealized Gain	'	'	79
Available-for-sale equity securities, Amortized cost	'	'	6,504
Available-for-sale equity securities, Carrying value	'	'	6,515
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	68
Available-for-sale securities, Estimated fair value	'	'	6,515
Mutual Funds And Other [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale Securities, Gross Unrealized Gain	'	'	194
Available-for-sale, Amortized cost	'	'	228,469
Available-for-sale, Gross unrealized losses, Recognized in OCI	'	'	652
Carrying value	'	'	228,011
Available-for-sale securities, Estimated fair value	'	'	228,011
Mutual Funds And Stock [Member]	'	'	'
Investment [Line Items]	'	'	'
Available-for-sale Securities, Gross Unrealized Gain	182	'	'
Available-for-sale, Amortized cost	262,493	'	'
Available-for-sale, Gross unrealized losses, Recognized in OCI	5,644	'	'
Carrying value	257,031	'	'
Available-for-sale securities, Estimated fair value	$257,031	'	'

Investment_Securities_Contract

Investment Securities (Contractual Maturities Debt Securities) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Investments [Abstract]	'	'
Held-to-maturity, Due in one year or less, Amortized cost	$66,525	'
Held-to-maturity, Due in one year or less, Estimated fair value	66,502	'
Held-to-maturity, Due after one year through five years, Amortized cost	200,748	'
Held-to-maturity, Due after one year through five years, Estimated fair value	198,494	'
Held-to-maturity, Due after five years through ten years, Amortized cost	213,234	'
Held-to-maturity, Due after five years through ten years, Estimated fair value	179,794	'
Held-to-maturity, Due after ten years, Amortized cost	353,947	'
Held-to-maturity, Due after ten years, Estimated fair value	283,118	'
Held-to-maturity, Amortized cost	834,454	802,343
Held-to-maturity, fair value	727,908	674,741
Available-for-sale, Due in one year or less, Amortized cost	466,546	'
Available-for-sale, Due in one year or less, Estimated fair value	441,052	'
Available-for-sale, Due after one year through five years, Amortized cost	1,112,538	'
Available-for-sale, Due after one year through five years, Estimated fair value	1,050,208	'
Available-for-sale, Due after five years through ten years, Amortized cost	640,232	'
Available-for-sale, Due after five years through ten years, Estimated fair value	597,543	'
Available-for-sale, Due after ten years, Amortized cost	1,359,652	'
Available-for-sale, Due after ten years, Estimated fair value	988,055	'
Available-for-sale, Amortized cost	3,578,968	'
Available-for-sale, Estimated fair value	$3,076,858	$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 $)	9 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	$8,310	$849
Available-for-sale, Less than 12 months - Estimated fair value	325,049	157,086
Available-for-sale, 12 months or more - Gross unrealized losses	557,589	697,086
Available-for-sale, 12 months or more - Estimated fair value	929,945	887,841
Available-for-sale, Total - Gross unrealized losses	565,899	697,935
Available-for-sale, Total - Estimated fair value	1,254,994	1,044,927
Investment Securities Gross Unrealized Losses Less Than 12 Months	12,557	1,479
Investment Securities Estimated Fair Value Less Than 12 Months	416,546	199,699
Investment Securities Gross Unrealized Losses 12 Months or More	678,204	837,718
Investment Securities Estimated Fair Value 12 Months or More	1,103,501	1,030,674
Investment Securities Gross Unrealized Losses Total	690,761	839,197
Investment Securities Estimated Fair Value Total	1,520,047	1,230,373
Municipal Securities [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	4,247	630
Held-to-maturity, Less than 12 months - Estimated fair value	91,497	42,613
Held-to-maturity, 12 months or more - Gross unrealized losses	814	79
Held-to-maturity, 12 months or more - Estimated fair value	10,915	5,910
Held-to-maturity, Total - Gross unrealized losses	5,061	709
Held-to-maturity, Total - Estimated fair value	102,412	48,523
Available-for-sale, Less than 12 months - Gross unrealized losses	20	61
Available-for-sale, Less than 12 months - Estimated fair value	2,871	4,898
Available-for-sale, 12 months or more - Gross unrealized losses	1,014	1,909
Available-for-sale, 12 months or more - Estimated fair value	8,507	11,768
Available-for-sale, Total - Gross unrealized losses	1,034	1,970
Available-for-sale, Total - Estimated fair value	11,378	16,666
Agency Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	119	35
Available-for-sale, Less than 12 months - Estimated fair value	24,255	18,633
Available-for-sale, 12 months or more - Gross unrealized losses	78	81
Available-for-sale, 12 months or more - Estimated fair value	6,495	6,916
Available-for-sale, Total - Gross unrealized losses	197	116
Available-for-sale, Total - Estimated fair value	30,750	25,549
Agency Guaranteed Mortgage-Backed Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	605	10
Available-for-sale, Less than 12 months - Estimated fair value	41,847	6,032
Available-for-sale, 12 months or more - Gross unrealized losses	4	6
Available-for-sale, 12 months or more - Estimated fair value	609	629
Available-for-sale, Total - Gross unrealized losses	609	16
Available-for-sale, Total - Estimated fair value	42,456	6,661
Small Business Administration Loan-Backed Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	784	91
Available-for-sale, Less than 12 months - Estimated fair value	76,868	15,199
Available-for-sale, 12 months or more - Gross unrealized losses	830	548
Available-for-sale, 12 months or more - Estimated fair value	39,855	69,011
Available-for-sale, Total - Gross unrealized losses	1,614	639
Available-for-sale, Total - Estimated fair value	116,723	84,210
Mutual Funds And Other [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	5,644	652
Available-for-sale, Less than 12 months - Estimated fair value	124,448	112,324
Available-for-sale, 12 months or more - Gross unrealized losses	0	0
Available-for-sale, 12 months or more - Estimated fair value	0	0
Available-for-sale, Total - Gross unrealized losses	5,644	652
Available-for-sale, Total - Estimated fair value	124,448	112,324
Held-To-Maturity [Member]	'	'
Investment [Line Items]	'	'
Held-to-maturity, Less than 12 months - Gross unrealized losses	4,247	630
Held-to-maturity, Less than 12 months - Estimated fair value	91,497	42,613
Held-to-maturity, 12 months or more - Gross unrealized losses	120,615	140,632
Held-to-maturity, 12 months or more - Estimated fair value	173,556	142,833
Held-to-maturity, Total - Gross unrealized losses	124,862	141,262
Held-to-maturity, Total - Estimated fair value	265,053	185,446
Available-for-sale Securities [Member]	'	'
Investment [Line Items]	'	'
Available-for-sale, Less than 12 months - Gross unrealized losses	2,666	197
Available-for-sale, Less than 12 months - Estimated fair value	200,601	44,762
Available-for-sale, 12 months or more - Gross unrealized losses	557,589	697,086
Available-for-sale, 12 months or more - Estimated fair value	929,945	887,841
Available-for-sale, Total - Gross unrealized losses	560,255	697,283
Available-for-sale, Total - Estimated fair value	1,130,546	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	109,490	129,560
Held-to-maturity, 12 months or more - Estimated fair value	151,350	126,019
Held-to-maturity, Total - Gross unrealized losses	109,490	129,560
Held-to-maturity, Total - Estimated fair value	151,350	126,019
Available-for-sale, Less than 12 months - Gross unrealized losses	1,138	0
Available-for-sale, Less than 12 months - Estimated fair value	54,760	0
Available-for-sale, 12 months or more - Gross unrealized losses	532,985	663,451
Available-for-sale, 12 months or more - Estimated fair value	840,551	765,421
Available-for-sale, Total - Gross unrealized losses	534,123	663,451
Available-for-sale, Total - Estimated fair value	895,311	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	10,311	10,993
Held-to-maturity, 12 months or more - Estimated fair value	11,291	10,904
Held-to-maturity, Total - Gross unrealized losses	10,311	10,993
Held-to-maturity, Total - Estimated fair value	11,291	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	2,788	6,941
Available-for-sale, 12 months or more - Estimated fair value	13,514	15,234
Available-for-sale, Total - Gross unrealized losses	2,788	6,941
Available-for-sale, Total - Estimated fair value	13,514	15,234
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	19,874	24,082
Available-for-sale, 12 months or more - Estimated fair value	19,518	16,403
Available-for-sale, Total - Gross unrealized losses	19,874	24,082
Available-for-sale, Total - Estimated fair value	19,518	16,403
Asset-Backed Securities [Member] | Auction Rate Securities [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	16	68
Available-for-sale, 12 months or more - Estimated fair value	896	2,459
Available-for-sale, Total - Gross unrealized losses	16	68
Available-for-sale, Total - Estimated fair value	$896	$2,459

Investment_Securities_Rollforw

Investment Securities (Rollforward Of Total Amount Of Credit-Related OTTI) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investment [Line Items]	'	'	'	'
Balance of credit-related OTTI at beginning of period	($420,529)	($321,650)	($408,043)	($320,986)
Credit-related OTTI not previously recognized	-168	0	-571	-341
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	-8,899	-2,736	-22,830	-19,912
Subtotal of amounts recognized in earnings	-9,067	-2,736	-23,401	-20,253
Reductions for securities sold during the period	0	0	1,848	16,853
Balance of credit-related OTTI at end of period	-429,596	-324,386	-429,596	-324,386
Held-To-Maturity [Member]	'	'	'	'
Investment [Line Items]	'	'	'	'
Balance of credit-related OTTI at beginning of period	-13,952	-6,467	-13,549	-6,126
Credit-related OTTI not previously recognized	0	0	-403	-341
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	0	-657	0	-657
Subtotal of amounts recognized in earnings	0	-657	-403	-998
Reductions for securities sold during the period	0	0	0	0
Balance of credit-related OTTI at end of period	-13,952	-7,124	-13,952	-7,124
Available-for-sale Securities [Member]	'	'	'	'
Investment [Line Items]	'	'	'	'
Balance of credit-related OTTI at beginning of period	-406,577	-315,183	-394,494	-314,860
Credit-related OTTI not previously recognized	-168	0	-168	0
Credit-related OTTI previously recognized when there is no intent to sell and no requirement to sell before recovery of amortized cost basis	-8,899	-2,079	-22,830	-19,255
Subtotal of amounts recognized in earnings	-9,067	-2,079	-22,998	-19,255
Reductions for securities sold during the period	0	0	1,848	16,853
Balance of credit-related OTTI at end of period	($415,644)	($317,262)	($415,644)	($317,262)

Investment_Securities_Noncredi

Investment Securities Noncredit Related Other Than Temporary Impairment (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
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)	$1,403	$1,140	$23,472	$25,922
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)	0	0	16,114	16,718
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)	$1,403	$1,140	$7,358	$9,204

Investment_Securities_Gains_An

Investment Securities (Gains And Losses, Including OTTI, Recognized In Statement Of Income) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Investments [Abstract]	'	'	'	'
Investment securities, Held-to-maturity, Gross gains	$32	$22	$63	$120
Other than Temporary Impairment Losses, Investments, Held-to-maturity Securities	0	657	403	998
Investment securities, Available-for-sale, Gross gains	1,551	3,026	7,989	14,955
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities	9,070	2,081	27,324	25,045
Other noninterest-bearing investments, Nonmarketable equity securities, Gross gains	4,802	3,230	9,868	22,951
Other noninterest-bearing investments, Nonmarketable equity securities, Gross losses	1,637	547	1,662	11,016
Total investment securities and other noninterest-bearing investments, Gross gains	6,385	6,278	17,920	38,026
Total investment securities and other noninterest-bearing investments, Gross losses	10,707	3,285	29,389	37,059
Net losses	-4,322	2,993	-11,469	967
Net impairment losses on investment securities	-9,067	-2,736	-23,401	-20,253
Equity securities gains (losses)	3,165	2,683	8,206	11,935
Fixed income securities gains (losses), net	$1,580	$3,046	$3,726	$9,285

Loans_And_Allowance_For_Credit2

Loans And Allowance For Credit Losses (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2011
			D
			Payments
			M
			Billing_Cycles
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'	'	'	'
EffectOfChangingCreditConversionFactorsInReserveForUnfundedLendingCommitmentsProcess	$18,400,000	'	'	'	'	'	'	'
EffectOfRefinementsToRiskGradingMethodologyOnClassifiedLoans	137,000,000	'	'	'	'	'	'	'
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Provision for Loan Losses	-2,000,000	-9,000,000	-9,100,000	-16,300,000	'	'	'	'
Line of Credit Facility, Remaining Borrowing Capacity	6,000,000	'	6,000,000	'	'	'	13,000,000	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	882,000	2,336,000	2,850,000	10,460,000	178,800,000	164,600,000	'	'
Allowance for loan losses transfered from commerical loans to commercial real estate loans from modified reporting	'	83,100,000	'	83,100,000	'	'	83,000,000	68,200,000
Unearned income and fees, net of related costs	132,400,000	'	132,400,000	'	'	'	137,500,000	'
Owner occupied and commercial real estate loans, unamortized premiums	49,900,000	'	49,900,000	'	'	'	59,300,000	'
Loans at carrying value pledged as collateral for current and potential borrowings	22,400,000,000	'	22,400,000,000	'	'	'	21,100,000,000	'
Payments for Origination and Purchases of Loans Held-for-sale	374,000,000	452,000,000	1,152,000,000	1,260,000,000	'	'	'	'
Loans and Leases Receivable, Gain (Loss) on Sales, Net	5,000,000	8,500,000	22,000,000	22,000,000	'	'	'	'
Principle amount of loans held for sale sold	421,000,000	369,000,000	1,315,000,000	1,244,000,000	'	'	'	'
Number of days for consumer loans to be charged off	'	'	180	'	'	'	'	'
Number of days for closed-end loans to be charged off	'	'	120	'	'	'	'	'
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	'	'	'	'	'
Recorded investment in TDR loans modified with interest rates below market	204,900,000	'	204,900,000	'	'	'	225,600,000	'
Net carrying amount of certain PCI loans	100,000	'	100,000	'	'	'	12,200,000	'
Charge-offs (recoveries), net before FDIC indemnification	-1,900,000	1,400,000	-2,500,000	-8,100,000	'	'	'	'
Total reversal amount to ALLL	2,300,000	8,300,000	13,200,000	18,900,000	'	'	'	'
Additional interest income due to increased cash flows from acquired loans	15,000,000	14,400,000	62,400,000	35,600,000	'	'	'	'
Additional noninterest expense due to increased cash flows from acquired loans	$13,000,000	$17,600,000	$55,100,000	$45,500,000	'	'	'	'
Loss sharing reimbursement, minimum	80.00%	'	80.00%	'	'	'	'	'
Loss sharing reimbursement, maximum	95.00%	'	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	'	'	'	'	'
Commercial [Member]	'	'	'	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'	'	'	'
Subsequent payment default period, number of days	'	'	90	'	'	'	'	'
Consumer [Member]	'	'	'	'	'	'	'	'
Loans And Allowance For Credit Losses [Line Items]	'	'	'	'	'	'	'	'
Subsequent payment default period, number of days	'	'	60	'	'	'	'	'

Loans_And_Allowance_For_Credit3

Loans And Allowance For Credit Losses (Summary Of Major Portfolio Segment And Specific Loan Class) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans And Allowance For Credit Losses [Abstract]	'	'
Loans held for sale	$114,810	$251,651
Commercial and industrial	11,904,477	11,256,945
Leasing	375,125	422,513
Owner occupied	7,378,586	7,589,082
Municipal	448,643	494,183
Total commercial	20,106,831	19,762,723
Construction and land development	2,240,295	1,939,413
Term	7,928,540	8,062,819
Total commercial real estate	10,168,835	10,002,232
Home equity credit line	2,124,328	2,177,680
1-4 family residential	4,636,895	4,350,329
Construction and other consumer real estate	321,436	321,235
Bankcard and other revolving plans	331,966	306,428
Other	207,578	216,379
Total consumer	7,622,203	7,372,051
FDIC-supported loans	374,861	528,241
Total loans	$38,272,730	$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

9 Months Ended

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2012

Dec. 31, 2011

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for Loan and Lease Losses, Provision for Loss, Gross

($5,573,000)

($1,889,000)

($56,598,000)

$24,628,000

'

'

'

'

Change In Allowance Covered By F D I C Indemnification

-2,118,000

-5,908,000

-9,756,000

-12,821,000

'

'

'

'

Allowance for Loan and Lease Losses, Write-offs

-22,826,000

58,781,000

93,392,000

212,480,000

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

Balance at beginning of period

813,912,000

973,443,000

896,087,000

1,051,685,000

'

'

'

'

Net loan and lease charge-offs

-8,698,000

-38,578,000

-32,210,000

-136,424,000

'

'

'

'

Balance at end of period

84,147,000

105,850,000

84,147,000

105,850,000

104,082,000

106,809,000

103,586,000

102,422,000

Allowance for loan losses

797,523,000

927,068,000

797,523,000

927,068,000

'

'

'

'

Reserve for unfunded lending commitments

84,147,000

105,850,000

84,147,000

105,850,000

104,082,000

106,809,000

103,586,000

102,422,000

Total allowance for credit losses

881,670,000

1,032,918,000

881,670,000

1,032,918,000

'

'

'

'

Allowance for Loan and Lease Losses, Recoveries of Bad Debts

14,128,000

-20,203,000

-61,182,000

-76,056,000

'

'

'

'

Provision for Unfunded Lending Commitments

-19,935,000

2,264,000

-22,662,000

3,428,000

'

'

'

'

Balance at end of period

797,523,000

927,068,000

797,523,000

927,068,000

'

'

'

'

Commercial [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for Loan and Lease Losses, Provision for Loss, Gross

-1,768,000

-4,324,000

-10,179,000

20,859,000

'

'

'

'

Change In Allowance Covered By F D I C Indemnification

0

0

0

0

'

'

'

'

Allowance for Loan and Lease Losses, Write-offs

-11,465,000

26,424,000

48,073,000

91,477,000

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

Balance at beginning of period

486,353,000

542,170,000

510,908,000

561,351,000

'

'

'

'

Net loan and lease charge-offs

-5,310,000

-14,411,000

-21,454,000

-58,775,000

'

'

'

'

Balance at end of period

47,139,000

71,095,000

47,139,000

71,095,000

63,272,000

67,374,000

70,553,000

77,232,000

Allowance for loan losses

479,275,000

523,435,000

479,275,000

523,435,000

'

'

'

'

Reserve for unfunded lending commitments

47,139,000

71,095,000

47,139,000

71,095,000

63,272,000

67,374,000

70,553,000

77,232,000

Total allowance for credit losses

526,414,000

594,530,000

526,414,000

594,530,000

'

'

'

'

Allowance for Loan and Lease Losses, Recoveries of Bad Debts

6,155,000

-12,013,000

-26,619,000

-32,702,000

'

'

'

'

Provision for Unfunded Lending Commitments

-16,133,000

542,000

-20,235,000

-6,137,000

'

'

'

'

Balance at end of period

479,275,000

523,435,000

479,275,000

523,435,000

'

'

'

'

Commercial Real Estate [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for Loan and Lease Losses, Provision for Loss, Gross

-4,520,000

2,157,000

-34,370,000

-2,769,000

'

'

'

'

Change In Allowance Covered By F D I C Indemnification

0

0

0

0

'

'

'

'

Allowance for Loan and Lease Losses, Write-offs

-5,738,000

20,264,000

19,069,000

70,098,000

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

Balance at beginning of period

251,278,000

307,965,000

276,976,000

343,747,000

'

'

'

'

Net loan and lease charge-offs

-2,750,000

-16,952,000

1,402,000

-47,808,000

'

'

'

'

Balance at end of period

33,444,000

33,404,000

33,444,000

33,404,000

39,454,000

37,852,000

31,663,000

23,572,000

Allowance for loan losses

244,008,000

293,170,000

244,008,000

293,170,000

'

'

'

'

Reserve for unfunded lending commitments

33,444,000

33,404,000

33,444,000

33,404,000

39,454,000

37,852,000

31,663,000

23,572,000

Total allowance for credit losses

277,452,000

326,574,000

277,452,000

326,574,000

'

'

'

'

Allowance for Loan and Lease Losses, Recoveries of Bad Debts

2,988,000

-3,312,000

-20,471,000

-22,290,000

'

'

'

'

Provision for Unfunded Lending Commitments

-6,010,000

1,741,000

-4,408,000

9,832,000

'

'

'

'

Balance at end of period

244,008,000

293,170,000

244,008,000

293,170,000

'

'

'

'

Consumer Portfolio Segment [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for Loan and Lease Losses, Provision for Loss, Gross

569,000

3,351,000

-12,725,000

9,989,000

'

'

'

'

Change In Allowance Covered By F D I C Indemnification

0

0

0

0

'

'

'

'

Allowance for Loan and Lease Losses, Write-offs

-5,535,000

11,391,000

24,574,000

45,722,000

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

Balance at beginning of period

70,366,000

102,391,000

95,656,000

123,115,000

'

'

'

'

Net loan and lease charge-offs

-2,426,000

-8,129,000

-14,422,000

-35,491,000

'

'

'

'

Balance at end of period

3,564,000

1,351,000

3,564,000

1,351,000

1,356,000

1,583,000

1,370,000

1,618,000

Allowance for loan losses

68,509,000

97,613,000

68,509,000

97,613,000

'

'

'

'

Reserve for unfunded lending commitments

3,564,000

1,351,000

3,564,000

1,351,000

1,356,000

1,583,000

1,370,000

1,618,000

Total allowance for credit losses

72,073,000

98,964,000

72,073,000

98,964,000

'

'

'

'

Allowance for Loan and Lease Losses, Recoveries of Bad Debts

3,109,000

-3,262,000

-10,152,000

-10,231,000

'

'

'

'

Provision for Unfunded Lending Commitments

2,208,000

-19,000

1,981,000

-267,000

'

'

'

'

Balance at end of period

68,509,000

97,613,000

68,509,000

97,613,000

'

'

'

'

Federal Deposit Insurance Corporation Supported [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for Loan and Lease Losses, Provision for Loss, Gross

146,000

[1]

-3,073,000

[1]

676,000

[1]

-3,451,000

[1]

'

'

'

'

Change In Allowance Covered By F D I C Indemnification

-2,118,000

[1]

-5,908,000

[1]

-9,756,000

[1]

-12,821,000

[1]

'

'

'

'

Allowance for Loan and Lease Losses, Write-offs

-88,000

[1]

702,000

[1]

1,676,000

[1]

5,183,000

[1]

'

'

'

'

Allowance for Credit Losses [Roll Forward]

'

'

'

'

'

'

'

'

Balance at beginning of period

5,915,000

[1]

20,917,000

[1]

12,547,000

[1]

23,472,000

[1]

'

'

'

'

Net loan and lease charge-offs

1,788,000

[1]

914,000

[1]

2,264,000

[1]

5,650,000

[1]

'

'

'

'

Balance at end of period

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

Allowance for loan losses

5,731,000

[1]

12,850,000

[1]

5,731,000

[1]

12,850,000

[1]

'

'

'

'

Reserve for unfunded lending commitments

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

0

[1]

Total allowance for credit losses

5,731,000

[1]

12,850,000

[1]

5,731,000

[1]

12,850,000

[1]

'

'

'

'

Allowance for Loan and Lease Losses, Recoveries of Bad Debts

1,876,000

[1]

-1,616,000

[1]

-3,940,000

[1]

-10,833,000

[1]

'

'

'

'

Provision for Unfunded Lending Commitments

0

[1]

0

[1]

0

[1]

'

[1]

'

'

'

'

Balance at end of period

$5,731,000

[1]

$12,850,000

[1]

$5,731,000

[1]

$12,850,000

[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 $)

3 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2012

Dec. 31, 2011

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

$1,329,179

$1,008,923

$1,336,098

$937,433

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

25,242

18,776

94,456

48,208

'

'

'

'

Allowance for loan losses: Individually evaluated for impairment

-67,256

'

-67,256

'

'

-66,640

'

'

Allowance for loan losses: Collectively evaluated for impairment

725,143

'

725,143

'

'

817,322

'

'

Allowance for loan losses: Purchased loans with evidence of credit deterioration

5,124

'

5,124

'

'

12,125

'

'

Allowance for loan losses: Total

797,523

927,068

797,523

927,068

813,912

896,087

973,443

1,051,685

Outstanding loan balances: Individually evaluated for impairment

756,354

'

756,354

'

'

904,496

'

'

Outstanding loan balances: Collectively evaluated for impairment

37,183,125

'

37,183,125

'

'

36,291,555

'

'

Outstanding loan balances: Purchased loans with evidence of credit deterioration

333,251

'

333,251

'

'

469,196

'

'

Total loans

38,272,730

'

38,272,730

'

'

37,665,247

'

'

Commercial And Industrial [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

199,217

133,120

175,040

128,930

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

1,105

830

2,594

2,395

'

'

'

'

Total loans

11,904,477

'

11,904,477

'

'

11,256,945

'

'

Owner Occupied [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

217,439

187,072

211,225

168,328

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

915

558

2,810

1,729

'

'

'

'

Total loans

7,378,586

'

7,378,586

'

'

7,589,082

'

'

Commercial [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for loan losses: Individually evaluated for impairment

-39,950

'

-39,950

'

'

-30,587

'

'

Allowance for loan losses: Collectively evaluated for impairment

439,325

'

439,325

'

'

480,321

'

'

Allowance for loan losses: Purchased loans with evidence of credit deterioration

0

'

0

'

'

0

'

'

Allowance for loan losses: Total

479,275

523,435

479,275

523,435

486,353

510,908

542,170

561,351

Outstanding loan balances: Individually evaluated for impairment

327,999

'

327,999

'

'

353,380

'

'

Outstanding loan balances: Collectively evaluated for impairment

19,778,832

'

19,778,832

'

'

19,409,343

'

'

Outstanding loan balances: Purchased loans with evidence of credit deterioration

0

'

0

'

'

0

'

'

Total loans

20,106,831

'

20,106,831

'

'

19,762,723

'

'

Commercial Real Estate [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for loan losses: Individually evaluated for impairment

-15,117

'

-15,117

'

'

-22,295

'

'

Allowance for loan losses: Collectively evaluated for impairment

228,891

'

228,891

'

'

254,681

'

'

Allowance for loan losses: Purchased loans with evidence of credit deterioration

0

'

0

'

'

0

'

'

Allowance for loan losses: Total

244,008

293,170

244,008

293,170

251,278

276,976

307,965

343,747

Outstanding loan balances: Individually evaluated for impairment

322,996

'

322,996

'

'

437,647

'

'

Outstanding loan balances: Collectively evaluated for impairment

9,845,839

'

9,845,839

'

'

9,564,585

'

'

Outstanding loan balances: Purchased loans with evidence of credit deterioration

0

'

0

'

'

0

'

'

Total loans

10,168,835

'

10,168,835

'

'

10,002,232

'

'

Consumer [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for loan losses: Individually evaluated for impairment

-12,189

'

-12,189

'

'

-13,758

'

'

Allowance for loan losses: Collectively evaluated for impairment

56,320

'

56,320

'

'

81,898

'

'

Allowance for loan losses: Purchased loans with evidence of credit deterioration

0

'

0

'

'

0

'

'

Allowance for loan losses: Total

68,509

97,613

68,509

97,613

70,366

95,656

102,391

123,115

Outstanding loan balances: Individually evaluated for impairment

104,308

'

104,308

'

'

112,320

'

'

Outstanding loan balances: Collectively evaluated for impairment

7,517,895

'

7,517,895

'

'

7,259,731

'

'

Outstanding loan balances: Purchased loans with evidence of credit deterioration

0

'

0

'

'

0

'

'

Total loans

7,622,203

'

7,622,203

'

'

7,372,051

'

'

FDIC- Supported [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Allowance for loan losses: Individually evaluated for impairment

0

'

0

'

'

0

'

'

Allowance for loan losses: Collectively evaluated for impairment

607

'

607

'

'

422

'

'

Allowance for loan losses: Purchased loans with evidence of credit deterioration

5,124

'

5,124

'

'

12,125

'

'

Allowance for loan losses: Total

5,731

[1]

12,850

[1]

5,731

[1]

12,850

[1]

5,915

[1]

12,547

[1]

20,917

[1]

23,472

[1]

Outstanding loan balances: Individually evaluated for impairment

1,051

'

1,051

'

'

1,149

'

'

Outstanding loan balances: Collectively evaluated for impairment

40,559

'

40,559

'

'

57,896

'

'

Outstanding loan balances: Purchased loans with evidence of credit deterioration

333,251

'

333,251

'

'

469,196

'

'

Total loans

374,861

'

374,861

'

'

528,241

'

'

Municipal [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

0

3,943

0

1,314

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

0

0

0

'

'

'

'

'

Total loans

448,643

'

448,643

'

'

494,183

'

'

Commercial Loan [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

416,656

324,135

386,265

298,572

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

2,020

1,388

5,404

4,124

'

'

'

'

Total loans

20,106,831

'

20,106,831

'

'

19,762,723

'

'

Commercial Real Estate Construction Financing Receivable [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

135,013

205,295

139,194

188,064

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

623

1,133

2,754

2,780

'

'

'

'

Total loans

2,240,295

'

2,240,295

'

'

1,939,413

'

'

Term [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

288,980

288,735

285,307

258,159

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

1,969

1,723

5,571

5,806

'

'

'

'

Total loans

7,928,540

'

7,928,540

'

'

8,062,819

'

'

Commercial Real Estate [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

423,993

494,030

424,501

446,223

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

2,592

2,856

8,325

8,586

'

'

'

'

Total loans

10,168,835

'

10,168,835

'

'

10,002,232

'

'

Home Equity Line of Credit [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

14,606

742

12,943

847

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

120

3

262

6

'

'

'

'

Total loans

2,124,328

'

2,124,328

'

'

2,177,680

'

'

One Through Four Family Residential [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

103,379

86,103

100,012

79,993

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

457

431

1,171

1,162

'

'

'

'

Total loans

4,636,895

'

4,636,895

'

'

4,350,329

'

'

Construction And Other Consumer Real Estate [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

5,501

6,764

5,767

6,641

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

49

43

141

128

'

'

'

'

Total loans

321,436

'

321,436

'

'

321,235

'

'

Revolving Credit Facility [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

0

287

0

128

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

0

0

0

0

'

'

'

'

Total loans

331,966

'

331,966

'

'

306,428

'

'

Consumer Other Financing Receivable [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

1,751

1,972

1,784

2,320

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

0

0

0

0

'

'

'

'

Total loans

207,578

'

207,578

'

'

216,379

'

'

Consumer Loan [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

125,237

95,868

120,506

89,929

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

626

477

1,574

1,296

'

'

'

'

Total loans

7,622,203

'

7,622,203

'

'

7,372,051

'

'

Fdic Supported Loans [Member]

'

'

'

'

'

'

'

'

Financing Receivable, Allowance for Credit Losses [Line Items]

'

'

'

'

'

'

'

'

Impaired Financing Receivable, Average Recorded Investment

363,293

94,890

404,826

102,709

'

'

'

'

Impaired Financing Receivable, Interest Income, Accrual Method

20,004

[2]

14,055

[2]

79,153

[2]

34,202

[2]

'

'

'

'

Total loans

$374,861

'

$374,861

'

'

$528,241

'

'

[1]

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

[2]

The balance of interest income recognized results primarily from accretion of interest income on impaired FDIC-supported loans.

Loans_And_Allowance_For_Credit6

Loans And Allowance For Credit Losses (Summary Of Nonaccrual Loans) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	$471,539	$648,153
Commercial And Industrial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	100,188	90,859
Leasing [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	796	838
Owner Occupied [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	157,609	206,031
Municipal [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	10,006	9,234
Commercial Loan [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	268,599	306,962
Commercial Real Estate Construction Financing Receivable [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	65,320	107,658
Term [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	60,378	124,615
Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	125,698	232,273
Home Equity Line of Credit [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	8,425	14,247
One Through Four Family Residential [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	57,658	70,180
Construction And Other Consumer Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	4,080	4,560
Revolving Credit Facility [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	1,186	1,190
Consumer Other Financing Receivable [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	1,149	1,398
Consumer Loan [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	72,498	91,575
Fdic Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total	$4,744	$17,343

Loans_And_Allowance_For_Credit7

Loans And Allowance For Credit Losses (Summary Of Past Due Loans (Accruing And Nonaccruing)) (Details) (USD $)	Sep. 30, 2013		Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	$37,924,207		$37,046,712
30-89 days past due	141,360		269,740
90+ days past due	207,163		348,795
Total past due	348,523		618,535
Total loans	38,272,730		37,665,247
Accruing loans 90+ days past due	31,848		61,763
Nonaccrual loans that are current	250,974	[1]	288,728	[1]
Commercial [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Total loans	20,106,831		19,762,723
Commercial Loan [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	19,932,181		19,487,495
30-89 days past due	68,129		130,174
90+ days past due	106,521		145,054
Total past due	174,650		275,228
Total loans	20,106,831		19,762,723
Accruing loans 90+ days past due	5,386		5,835
Nonaccrual loans that are current	151,930	[1]	142,458	[1]
Commercial Real Estate [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Total loans	10,168,835		10,002,232
Consumer [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Total loans	7,622,203		7,372,051
Consumer Loan [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	7,566,819		7,283,781
30-89 days past due	22,520		36,290
90+ days past due	32,864		51,980
Total past due	55,384		88,270
Total loans	7,622,203		7,372,051
Accruing loans 90+ days past due	1,651		2,935
Nonaccrual loans that are current	34,724	[1]	34,287	[1]
Commercial And Industrial [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	11,820,258		11,124,639
30-89 days past due	28,268		73,555
90+ days past due	55,951		58,751
Total past due	84,219		132,306
Total loans	11,904,477		11,256,945
Accruing loans 90+ days past due	2,280		4,013
Nonaccrual loans that are current	44,546	[1]	32,389	[1]
Leasing [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	374,200		421,590
30-89 days past due	323		115
90+ days past due	602		808
Total past due	925		923
Total loans	375,125		422,513
Accruing loans 90+ days past due	0		0
Nonaccrual loans that are current	0	[1]	0	[1]
Owner Occupied [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	7,289,080		7,447,083
30-89 days past due	39,538		56,504
90+ days past due	49,968		85,495
Total past due	89,506		141,999
Total loans	7,378,586		7,589,082
Accruing loans 90+ days past due	3,106		1,822
Nonaccrual loans that are current	97,378	[1]	100,835	[1]
Municipal [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	448,643		494,183
30-89 days past due	0		0
90+ days past due	0		0
Total past due	0		0
Total loans	448,643		494,183
Accruing loans 90+ days past due	0		0
Nonaccrual loans that are current	10,006	[1]	9,234	[1]
Commercial Real Estate Construction Financing Receivable [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	2,200,392		1,836,284
30-89 days past due	21,609		66,139
90+ days past due	18,294		36,990
Total past due	39,903		103,129
Total loans	2,240,295		1,939,413
Accruing loans 90+ days past due	0		853
Nonaccrual loans that are current	28,140	[1]	50,044	[1]
Term [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	7,885,730		7,984,819
30-89 days past due	17,940		24,730
90+ days past due	24,870		53,270
Total past due	42,810		78,000
Total loans	7,928,540		8,062,819
Accruing loans 90+ days past due	2,361		107
Nonaccrual loans that are current	33,780	[1]	54,546	[1]
Commercial Real Estate [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	10,086,122		9,821,103
30-89 days past due	39,549		90,869
90+ days past due	43,164		90,260
Total past due	82,713		181,129
Total loans	10,168,835		10,002,232
Accruing loans 90+ days past due	2,361		960
Nonaccrual loans that are current	61,920	[1]	104,590	[1]
Home Equity Line of Credit [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	2,116,048		2,169,722
30-89 days past due	4,357		4,036
90+ days past due	3,923		3,922
Total past due	8,280		7,958
Total loans	2,124,328		2,177,680
Accruing loans 90+ days past due	0		0
Nonaccrual loans that are current	3,226	[1]	8,846	[1]
One Through Four Family Residential [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	4,598,613		4,282,611
30-89 days past due	13,816		24,060
90+ days past due	24,466		43,658
Total past due	38,282		67,718
Total loans	4,636,895		4,350,329
Accruing loans 90+ days past due	551		1,423
Nonaccrual loans that are current	28,850	[1]	21,945	[1]
Construction And Other Consumer Real Estate [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	317,305		314,931
30-89 days past due	1,574		4,344
90+ days past due	2,557		1,960
Total past due	4,131		6,304
Total loans	321,436		321,235
Accruing loans 90+ days past due	368		395
Nonaccrual loans that are current	1,738	[1]	2,500	[1]
Revolving Credit Facility [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	329,055		302,587
30-89 days past due	1,951		2,439
90+ days past due	960		1,402
Total past due	2,911		3,841
Total loans	331,966		306,428
Accruing loans 90+ days past due	669		1,010
Nonaccrual loans that are current	840	[1]	721	[1]
Consumer Other Financing Receivable [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	205,798		213,930
30-89 days past due	822		1,411
90+ days past due	958		1,038
Total past due	1,780		2,449
Total loans	207,578		216,379
Accruing loans 90+ days past due	63		107
Nonaccrual loans that are current	70	[1]	275	[1]
Fdic Supported Loans [Member]	'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'
Current	339,085		454,333
30-89 days past due	11,162		12,407
90+ days past due	24,614		61,501
Total past due	35,776		73,908
Total loans	374,861		528,241
Accruing loans 90+ days past due	22,450		52,033
Nonaccrual loans that are current	$2,400	[1]	$7,393	[1]
[1]	Represents nonaccrual loans that are 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 $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Loans held for sale	$114,810	$251,651
Commercial and industrial	11,904,477	11,256,945
Leasing	375,125	422,513
Owner occupied	7,378,586	7,589,082
Municipal	448,643	494,183
Total commercial	20,106,831	19,762,723
Construction and land development	2,240,295	1,939,413
Term	7,928,540	8,062,819
Total commercial real estate	10,168,835	10,002,232
Home equity credit line	2,124,328	2,177,680
1-4 family residential	4,636,895	4,350,329
Construction and other consumer real estate	321,436	321,235
Bankcard and other revolving plans	331,966	306,428
Other	207,578	216,379
Total consumer	7,622,203	7,372,051
Total loans	38,272,730	37,665,247
Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total loans	36,024,428	35,028,381
Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total loans	715,805	696,548
Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total loans	1,524,012	1,927,313
Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total loans	8,485	13,005
Total Allowance [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total loans	797,523	896,087
Commercial [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	11,904,477	11,256,945
Leasing	375,125	422,513
Owner occupied	7,378,586	7,589,082
Municipal	448,643	494,183
Total commercial	20,106,831	19,762,723
Total loans	20,106,831	19,762,723
Commercial [Member] | Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	11,176,352	10,717,594
Leasing	369,152	419,482
Owner occupied	6,760,607	6,833,923
Municipal	438,637	453,193
Total commercial	18,744,748	18,424,192
Commercial [Member] | Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	331,846	198,645
Leasing	2,875	226
Owner occupied	131,895	138,539
Municipal	0	31,756
Total commercial	466,616	369,166
Commercial [Member] | Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	391,335	336,230
Leasing	3,098	2,805
Owner occupied	484,779	612,011
Municipal	10,006	9,234
Total commercial	889,218	960,280
Commercial [Member] | Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Commercial and industrial	4,944	4,476
Leasing	0	0
Owner occupied	1,305	4,609
Municipal	0	0
Total commercial	6,249	9,085
Commercial [Member] | Total Allowance [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total commercial	479,275	510,908
Commercial Real Estate Construction Financing Receivable [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Construction and land development	2,240,295	1,939,413
Total loans	2,240,295	1,939,413
Commercial Real Estate Construction Financing Receivable [Member] | Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Construction and land development	2,094,934	1,648,215
Commercial Real Estate Construction Financing Receivable [Member] | Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Construction and land development	15,250	57,348
Commercial Real Estate Construction Financing Receivable [Member] | Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Construction and land development	127,875	233,374
Commercial Real Estate Construction Financing Receivable [Member] | Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Construction and land development	2,236	476
Commercial Real Estate [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	7,928,540	8,062,819
Total commercial real estate	10,168,835	10,002,232
Total loans	10,168,835	10,002,232
Commercial Real Estate [Member] | Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	7,414,358	7,433,789
Total commercial real estate	9,509,292	9,082,004
Commercial Real Estate [Member] | Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	213,538	237,201
Total commercial real estate	228,788	294,549
Commercial Real Estate [Member] | Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	300,644	388,914
Total commercial real estate	428,519	622,288
Commercial Real Estate [Member] | Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Term	0	2,915
Total commercial real estate	2,236	3,391
Commercial Real Estate [Member] | Total Allowance [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total commercial real estate	244,008	276,976
Consumer [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Home equity credit line	2,124,328	2,177,680
1-4 family residential	4,636,895	4,350,329
Construction and other consumer real estate	321,436	321,235
Bankcard and other revolving plans	331,966	306,428
Other	207,578	216,379
Total consumer	7,622,203	7,372,051
Total loans	7,622,203	7,372,051
Consumer [Member] | Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Home equity credit line	2,105,327	2,138,693
1-4 family residential	4,563,611	4,234,426
Construction and other consumer real estate	312,046	313,499
Bankcard and other revolving plans	329,442	298,665
Other	206,174	209,293
Total consumer	7,516,600	7,194,576
Consumer [Member] | Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Home equity credit line	0	85
1-4 family residential	0	4,316
Construction and other consumer real estate	0	218
Bankcard and other revolving plans	0	23
Other	0	3,211
Total consumer	0	7,853
Consumer [Member] | Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Home equity credit line	19,001	38,897
1-4 family residential	73,284	111,063
Construction and other consumer real estate	9,390	7,518
Bankcard and other revolving plans	2,524	7,740
Other	1,404	3,875
Total consumer	105,603	169,093
Consumer [Member] | Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Home equity credit line	0	5
1-4 family residential	0	524
Construction and other consumer real estate	0	0
Bankcard and other revolving plans	0	0
Other	0	0
Total consumer	0	529
Consumer [Member] | Total Allowance [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
Total consumer	68,509	95,656
FDIC-Supported Loans [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	374,861	528,241
FDIC-Supported Loans [Member] | Pass [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	253,788	327,609
FDIC-Supported Loans [Member] | Special Mention [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	20,401	24,980
FDIC-Supported Loans [Member] | Sub-Standard [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	100,672	175,652
FDIC-Supported Loans [Member] | Doubtful [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	0	0
FDIC-Supported Loans [Member] | Total Allowance [Member]	'	'
Financing Receivable, Allowance for Credit Losses [Line Items]	'	'
FDIC-supported loans	$5,731	$12,547

Loans_And_Allowance_For_Credit9

Loans And Allowance For Credit Losses (Summary Of Information On Impaired Loans) (Details) (USD $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Loans and Leases Receivable, Gross, Consumer, Home Equity	$2,124,328		'		$2,124,328		'		$2,177,680
Unpaid principal balance	1,246,086		'		1,246,086		'		1,908,339
Recorded investment	1,041,526		'		1,041,526		'		1,325,838
Impaired Financing Receivable, Related Allowance	67,466		'		67,466		'		77,089
Average recorded investment	1,329,179		1,008,923		1,336,098		937,433		'
Interest income recognized	25,242		18,776		94,456		48,208		'
Commercial And Industrial [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	176,337		'		176,337		'		176,521
Recorded investment	153,681		'		153,681		'		146,815
Impaired Financing Receivable, Related Allowance	20,670		'		20,670		'		12,198
Average recorded investment	199,217		133,120		175,040		128,930		'
Interest income recognized	1,105		830		2,594		2,395		'
Owner Occupied [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	166,488		'		166,488		'		210,319
Recorded investment	153,733		'		153,733		'		185,695
Impaired Financing Receivable, Related Allowance	15,668		'		15,668		'		17,105
Average recorded investment	217,439		187,072		211,225		168,328		'
Interest income recognized	915		558		2,810		1,729		'
Commercial Loan [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	342,825		'		342,825		'		386,840
Recorded investment	307,414		'		307,414		'		332,510
Impaired Financing Receivable, Related Allowance	36,338		'		36,338		'		29,303
Average recorded investment	416,656		324,135		386,265		298,572		'
Interest income recognized	2,020		1,388		5,404		4,124		'
Commercial Real Estate Construction Financing Receivable [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	130,435		'		130,435		'		182,385
Recorded investment	113,391		'		113,391		'		153,096
Impaired Financing Receivable, Related Allowance	3,572		'		3,572		'		5,178
Average recorded investment	135,013		205,295		139,194		188,064		'
Interest income recognized	623		1,133		2,754		2,780		'
Term [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	207,519		'		207,519		'		310,242
Recorded investment	182,347		'		182,347		'		257,830
Impaired Financing Receivable, Related Allowance	10,243		'		10,243		'		16,725
Average recorded investment	288,980		288,735		285,307		258,159		'
Interest income recognized	1,969		1,723		5,571		5,806		'
Commercial Real Estate [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	337,954		'		337,954		'		492,627
Recorded investment	295,738		'		295,738		'		410,926
Impaired Financing Receivable, Related Allowance	13,815		'		13,815		'		21,903
Average recorded investment	423,993		494,030		424,501		446,223		'
Interest income recognized	2,592		2,856		8,325		8,586		'
Home Equity Line of Credit [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	15,056		'		15,056		'		14,339
Recorded investment	12,244		'		12,244		'		11,499
Impaired Financing Receivable, Related Allowance	182		'		182		'		297
Average recorded investment	14,606		742		12,943		847		'
Interest income recognized	120		3		262		6		'
One Through Four Family Residential [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	101,913		'		101,913		'		108,934
Recorded investment	86,303		'		86,303		'		92,469
Impaired Financing Receivable, Related Allowance	11,778		'		11,778		'		12,921
Average recorded investment	103,379		86,103		100,012		79,993		'
Interest income recognized	457		431		1,171		1,162		'
Construction And Other Consumer Real Estate [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	6,238		'		6,238		'		7,054
Recorded investment	4,772		'		4,772		'		5,795
Impaired Financing Receivable, Related Allowance	229		'		229		'		517
Average recorded investment	5,501		6,764		5,767		6,641		'
Interest income recognized	49		43		141		128		'
Revolving Credit Facility [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	'		'		'		'		287
Recorded investment	'		'		'		'		287
Impaired Financing Receivable, Related Allowance	'		'		'		'		1
Average recorded investment	0		287		0		128		'
Interest income recognized	0		0		0		0		'
Consumer Other Financing Receivable [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	753		'		753		'		2,454
Recorded investment	753		'		753		'		2,007
Impaired Financing Receivable, Related Allowance	0		'		0		'		22
Average recorded investment	1,751		1,972		1,784		2,320		'
Interest income recognized	0		0		0		0		'
Consumer Loan [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	123,960		'		123,960		'		133,068
Recorded investment	104,072		'		104,072		'		112,057
Impaired Financing Receivable, Related Allowance	12,189		'		12,189		'		13,758
Average recorded investment	125,237		95,868		120,506		89,929		'
Interest income recognized	626		477		1,574		1,296		'
Fdic Supported Loans [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Unpaid principal balance	441,347		'		441,347		'		895,804
Recorded investment	334,302		'		334,302		'		470,345
Impaired Financing Receivable, Related Allowance	5,124		'		5,124		'		12,125
Average recorded investment	363,293		94,890		404,826		102,709		'
Interest income recognized	20,004	[1]	14,055	[1]	79,153	[1]	34,202	[1]	'
Impaired Financing Receivable Related Allowance [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	689,878		'		689,878		'		751,045
Impaired Financing Receivable Related Allowance [Member] | Commercial And Industrial [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	124,439		'		124,439		'		119,780
Impaired Financing Receivable Related Allowance [Member] | Owner Occupied [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	102,850		'		102,850		'		106,282
Impaired Financing Receivable Related Allowance [Member] | Commercial Loan [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	227,289		'		227,289		'		226,062
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	64,479		'		64,479		'		85,855
Impaired Financing Receivable Related Allowance [Member] | Term [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	134,593		'		134,593		'		187,112
Impaired Financing Receivable Related Allowance [Member] | Commercial Real Estate [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	199,072		'		199,072		'		272,967
Impaired Financing Receivable Related Allowance [Member] | Home Equity Line of Credit [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	2,464		'		2,464		'		3,444
Impaired Financing Receivable Related Allowance [Member] | One Through Four Family Residential [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	46,529		'		46,529		'		49,867
Impaired Financing Receivable Related Allowance [Member] | Construction And Other Consumer Real Estate [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	1,603		'		1,603		'		3,085
Impaired Financing Receivable Related Allowance [Member] | Revolving Credit Facility [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	'		'		'		'		287
Impaired Financing Receivable Related Allowance [Member] | Consumer Other Financing Receivable [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	0		'		0		'		175
Impaired Financing Receivable Related Allowance [Member] | Consumer Loan [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	50,596		'		50,596		'		56,858
Impaired Financing Receivable Related Allowance [Member] | Fdic Supported Loans [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	212,921		'		212,921		'		195,158
Impaired Financing Receivable Recorded Investment With No Allowance [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	351,648		'		351,648		'		574,793
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial And Industrial [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	29,242		'		29,242		'		27,035
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Owner Occupied [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	50,883		'		50,883		'		79,413
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Loan [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	80,125		'		80,125		'		106,448
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	48,912		'		48,912		'		67,241
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Term [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	47,754		'		47,754		'		70,718
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Commercial Real Estate [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	96,666		'		96,666		'		137,959
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Home Equity Line of Credit [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	9,780		'		9,780		'		8,055
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | One Through Four Family Residential [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	39,774		'		39,774		'		42,602
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Construction And Other Consumer Real Estate [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	3,169		'		3,169		'		2,710
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Revolving Credit Facility [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	'		'		'		'		0
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Other Financing Receivable [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	753		'		753		'		1,832
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Consumer Loan [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	53,476		'		53,476		'		55,199
Impaired Financing Receivable Recorded Investment With No Allowance [Member] | Fdic Supported Loans [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Recorded investment	121,381		'		121,381		'		275,187
Nonaccruing [Member] | Home Equity Credit Line [Member]	'		'		'		'		'
Financing Receivable, Allowance for Credit Losses [Line Items]	'		'		'		'		'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'		'		'		'		$4,282
[1]	The balance of interest income recognized results primarily from accretion of interest income on impaired FDIC-supported loans.

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 $)	3 Months Ended			9 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$882		$2,336	$2,850		$10,460	$178,800	$164,600	'
Recorded investment resulting from the following modification types	551,366		'	551,366		'	'	'	622,502
1-4 family residential	4,636,895		'	4,636,895		'	'	'	4,350,329
Construction and other consumer real estate	321,436		'	321,436		'	'	'	321,235
Commercial and industrial	11,904,477		'	11,904,477		'	'	'	11,256,945
Home equity credit line	2,124,328		'	2,124,328		'	'	'	2,177,680
Bankcard and other revolving plans	331,966		'	331,966		'	'	'	306,428
Commercial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	11,904,477		'	11,904,477		'	'	'	11,256,945
Consumer [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	4,636,895		'	4,636,895		'	'	'	4,350,329
Construction and other consumer real estate	321,436		'	321,436		'	'	'	321,235
Home equity credit line	2,124,328		'	2,124,328		'	'	'	2,177,680
Bankcard and other revolving plans	331,966		'	331,966		'	'	'	306,428
Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	660		107	660		1,441	'	'	'
Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	511		5,405	'	'	'
Commercial Loan [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	660		107	1,171		6,846	'	'	'
Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		2,229	0		2,525	'	'	'
Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Commercial Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		2,229	0		2,525	'	'	'
Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	222		0	307		0	'	'	'
One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	1,372		1,089	'	'	'
Consumer Loan [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	222		0	1,679		1,089	'	'	'
Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	72,259		'	72,259		'	'	'	'
Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	60,855		'	60,855		'	'	'	'
Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	51,668		'	51,668		'	'	'	'
Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	136,445		'	136,445		'	'	'	'
Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	10,325		'	10,325		'	'	'	'
Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	50,546		'	50,546		'	'	'	'
Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	2,695		'	2,695		'	'	'	'
Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	26,569		'	26,569		'	'	'	'
Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	33,590		'	33,590		'	'	'	'
Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	59,171		'	59,171		'	'	'	'
Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	14,636		'	14,636		'	'	'	'
Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	1,927		'	1,927		'	'	'	'
Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	28,455		'	28,455		'	'	'	'
Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	1,965		'	1,965		'	'	'	'
Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	260		'	260		'	'	'	287
Interest Rate Below Market [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	87,012		'	87,012		'	'	'	91,884
Interest Rate Below Market [Member] | Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	355		'	355		'	'	'	'
Interest Rate Below Market [Member] | Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	22,121		'	22,121		'	'	'	'
Interest Rate Below Market [Member] | Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	2,062		'	2,062		'	'	'	'
Interest Rate Below Market [Member] | Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	34,482		'	34,482		'	'	'	'
Interest Rate Below Market [Member] | Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	743		'	743		'	'	'	'
Interest Rate Below Market [Member] | Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	2,649		'	2,649		'	'	'	'
Interest Rate Below Market [Member] | Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	133		'	133		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	2,609		'	2,609		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	3,096		'	3,096		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	11,822		'	11,822		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	2,480		'	2,480		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	0		'	0		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	4,455		'	4,455		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	5		'	5		'	'	'	'
Interest Rate Below Market [Member] | Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	0		'	0		'	'	'	0
Maturity Or Term Extension [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	58,808		'	58,808		'	'	'	51,214
Maturity Or Term Extension [Member] | Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	15,794		'	15,794		'	'	'	'
Maturity Or Term Extension [Member] | Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	4,768		'	4,768		'	'	'	'
Maturity Or Term Extension [Member] | Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	11,688		'	11,688		'	'	'	'
Maturity Or Term Extension [Member] | Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	9,516		'	9,516		'	'	'	'
Maturity Or Term Extension [Member] | Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Maturity Or Term Extension [Member] | Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	1,294		'	1,294		'	'	'	'
Maturity Or Term Extension [Member] | Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	963		'	963		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	8,958		'	8,958		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	1,471		'	1,471		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	1,750		'	1,750		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	0		'	0		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	1,420		'	1,420		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	926		'	926		'	'	'	'
Maturity Or Term Extension [Member] | Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	260		'	260		'	'	'	287
Principal Forgiveness [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	27,612		'	27,612		'	'	'	29,033
Principal Forgiveness [Member] | Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	0		'	0		'	'	'	'
Principal Forgiveness [Member] | Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	994		'	994		'	'	'	'
Principal Forgiveness [Member] | Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Principal Forgiveness [Member] | Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	5,331		'	5,331		'	'	'	'
Principal Forgiveness [Member] | Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	8,922		'	8,922		'	'	'	'
Principal Forgiveness [Member] | Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	7,861		'	7,861		'	'	'	'
Principal Forgiveness [Member] | Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	0		'	0		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	68		'	68		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	1,074		'	1,074		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	1,575		'	1,575		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	1,787		'	1,787		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	0		'	0		'	'	'	'
Principal Forgiveness [Member] | Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	0		'	0		'	'	'	0
Payment Deferral [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	23,380		'	23,380		'	'	'	19,609
Payment Deferral [Member] | Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	6,856		'	6,856		'	'	'	'
Payment Deferral [Member] | Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	2,961		'	2,961		'	'	'	'
Payment Deferral [Member] | Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	1,120		'	1,120		'	'	'	'
Payment Deferral [Member] | Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	5,766		'	5,766		'	'	'	'
Payment Deferral [Member] | Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Payment Deferral [Member] | Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	647		'	647		'	'	'	'
Payment Deferral [Member] | Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	0		'	0		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	156		'	156		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	3,823		'	3,823		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	0		'	0		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	2,051		'	2,051		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	0		'	0		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	0		'	0		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	0		'	0		'	'	'	'
Payment Deferral [Member] | Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	0		'	0		'	'	'	0
Other Recorded Investment Resulting From Following Modification [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	83,785	[1]	'	83,785	[1]	'	'	'	94,645	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	14,326	[1]	'	14,326	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	10,145	[1]	'	10,145	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	8,836	[1]	'	8,836	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	22,405	[1]	'	22,405	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	325	[1]	'	325	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	4,482	[1]	'	4,482	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	144	[1]	'	144	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	1,362	[1]	'	1,362	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	11,182	[1]	'	11,182	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	5,591	[1]	'	5,591	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	325	[1]	'	325	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	222	[1]	'	222	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	4,440	[1]	'	4,440	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	0	[1]	'	0	[1]	'	'	'	'
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	0	[1]	'	0	[1]	'	'	'	0	[1]
Multiple Modification Types [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	270,769	[2]	'	270,769	[2]	'	'	'	336,117	[2]
Multiple Modification Types [Member] | Accruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	34,928	[2]	'	34,928	[2]	'	'	'	'
Multiple Modification Types [Member] | Accruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	19,866	[2]	'	19,866	[2]	'	'	'	'
Multiple Modification Types [Member] | Accruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	27,962	[2]	'	27,962	[2]	'	'	'	'
Multiple Modification Types [Member] | Accruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	58,945	[2]	'	58,945	[2]	'	'	'	'
Multiple Modification Types [Member] | Accruing [Member] | Home Equity Credit Line [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	335	[2]	'	335	[2]	'	'	'	'
Multiple Modification Types [Member] | Accruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	33,613	[2]	'	33,613	[2]	'	'	'	'
Multiple Modification Types [Member] | Accruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	1,455	[2]	'	1,455	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Commercial and industrial	13,416	[2]	'	13,416	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	12,944	[2]	'	12,944	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	40,008	[2]	'	40,008	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Recorded investment resulting from the following modification types	9,780	[2]	'	9,780	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Home equity credit line	130	[2]	'	130	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
1-4 family residential	16,353	[2]	'	16,353	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Construction and other consumer real estate	1,034	[2]	'	1,034	[2]	'	'	'	'
Multiple Modification Types [Member] | Nonaccruing [Member] | ERROR in label resolution.	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Bankcard and other revolving plans	$0	[2]	'	$0	[2]	'	'	'	$0	[2]
[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 $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	$2,124,328	'	$2,124,328	'	$2,177,680
Net financial impact on interest income	7,369	6,611	23,240	18,921	'
Commercial [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	1,168	443	3,466	1,169	'
Commercial Real Estate [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	2,371	1,716	8,040	5,211	'
Consumer [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,124,328	'	2,124,328	'	2,177,680
Net financial impact on interest income	3,830	4,452	11,734	12,541	'
Commercial And Industrial [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-107	-134	-308	-157	'
Owner Occupied [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-1,061	-309	-3,158	-1,012	'
Commercial Real Estate Construction Financing Receivable [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-237	-273	-755	-742	'
Term [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-2,134	-1,443	-7,285	-4,469	'
Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-24	-18	-97	-51	'
One Through Four Family Residential [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-3,700	-4,204	-11,313	-12,045	'
Construction And Other Consumer Real Estate [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Net financial impact on interest income	-106	-230	-324	-445	'
Nonaccruing [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	4,282
Nonaccruing [Member] | Principal Forgiveness [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	4,008
Nonaccruing [Member] | Interest Rate Below Market [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	0
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	0
Nonaccruing [Member] | Payment Deferral [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	0
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	131	[1]
Nonaccruing [Member] | Multiple Modification Types [Member] | Home Equity Credit Line [Member]	'	'	'	'	'
Financing Receivable, Modifications [Line Items]	'	'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	'	'	'	'	$143	[2]
[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_Sheet3

Loans And Allowance For Credit Losses (Schedule Of Investment Of Accruing And Nonaccruing Loans Modified As Troubled Debt Restructurings) (Details) (USD $)	3 Months Ended			9 Months Ended			12 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	$882		$2,336	$2,850		$10,460	$178,800	$164,600	'
Loans Receivable, Gross, Commercial and Industrial	11,904,477		'	11,904,477		'	'	'	11,256,945
Financing Receivable, Modifications, Recorded Investment	551,366		'	551,366		'	'	'	622,502
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,124,328		'	2,124,328		'	'	'	2,177,680
Loans and Leases Receivable, Gross, Consumer, Mortgage	4,636,895		'	4,636,895		'	'	'	4,350,329
Loans and Leases Receivable, Gross, Consumer, Construction	321,436		'	321,436		'	'	'	321,235
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	331,966		'	331,966		'	'	'	306,428
Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	384,793		'	384,793		'	'	'	407,026
Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	882		2,336	2,850		10,460	'	'	'
Financing Receivable, Modifications, Recorded Investment	166,573		'	166,573		'	'	'	215,476
Commercial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	11,904,477		'	11,904,477		'	'	'	11,256,945
Consumer [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	2,124,328		'	2,124,328		'	'	'	2,177,680
Loans and Leases Receivable, Gross, Consumer, Mortgage	4,636,895		'	4,636,895		'	'	'	4,350,329
Loans and Leases Receivable, Gross, Consumer, Construction	321,436		'	321,436		'	'	'	321,235
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	331,966		'	331,966		'	'	'	306,428
Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	660		107	660		1,441	'	'	'
Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	77,443
Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	660		107	660		1,441	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	25,879
Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	511		5,405	'	'	'
Owner Occupied [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	59,983
Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	511		5,405	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	29,439
Commercial Loan [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	660		107	1,171		6,846	'	'	'
Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	133,114		'	133,114		'	'	'	137,426
Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	660		107	1,171		6,846	'	'	'
Financing Receivable, Modifications, Recorded Investment	60,159		'	60,159		'	'	'	55,318
Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		2,229	0		2,525	'	'	'
Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	50,327
Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		2,229	0		2,525	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	89,851
Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Term [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	159,323
Term [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	33,330
Commercial Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		2,229	0		2,525	'	'	'
Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	188,113		'	188,113		'	'	'	209,650
Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		2,229	0		2,525	'	'	'
Financing Receivable, Modifications, Recorded Investment	73,807		'	73,807		'	'	'	123,181
Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	222		0	307		0	'	'	'
Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		'	0		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	7,227
Home Equity Line of Credit [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	222		'	307		'	'	'	'
One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	1,372		1,089	'	'	'
One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	49,577
One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	1,372		1,089	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	30,315
Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	3,142
Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	1,921
ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	4
ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	172
Consumer Loan [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	222		0	1,679		1,089	'	'	'
Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	0		0	0		0	'	'	'
Financing Receivable, Modifications, Recorded Investment	63,566		'	63,566		'	'	'	59,950
Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Subsequent Default, Recorded Investment	222		0	1,679		1,089	'	'	'
Financing Receivable, Modifications, Recorded Investment	32,607		'	32,607		'	'	'	36,977
Maturity Or Term Extension [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	58,808		'	58,808		'	'	'	51,214
Maturity Or Term Extension [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	44,023		'	44,023		'	'	'	31,292
Maturity Or Term Extension [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	14,785		'	14,785		'	'	'	19,922
Maturity Or Term Extension [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	6,139
Maturity Or Term Extension [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	5,667
Maturity Or Term Extension [Member] | Owner Occupied [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	12,104
Maturity Or Term Extension [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	4,816
Maturity Or Term Extension [Member] | Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	20,562		'	20,562		'	'	'	18,243
Maturity Or Term Extension [Member] | Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	10,429		'	10,429		'	'	'	10,483
Maturity Or Term Extension [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	9,868
Maturity Or Term Extension [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	1,308
Maturity Or Term Extension [Member] | Term [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	1,854
Maturity Or Term Extension [Member] | Term [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	536
Maturity Or Term Extension [Member] | Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	21,204		'	21,204		'	'	'	11,722
Maturity Or Term Extension [Member] | Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	1,750		'	1,750		'	'	'	1,844
Maturity Or Term Extension [Member] | Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Maturity Or Term Extension [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	1,324
Maturity Or Term Extension [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	5,637
Maturity Or Term Extension [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	0
Maturity Or Term Extension [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	1,671
Maturity Or Term Extension [Member] | ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	3
Maturity Or Term Extension [Member] | ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Maturity Or Term Extension [Member] | Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	2,257		'	2,257		'	'	'	1,327
Maturity Or Term Extension [Member] | Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	2,606		'	2,606		'	'	'	7,595
Other Recorded Investment Resulting From Following Modification [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	83,785	[1]	'	83,785	[1]	'	'	'	94,645	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	60,663	[1]	'	60,663	[1]	'	'	'	71,947	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	23,122	[1]	'	23,122	[1]	'	'	'	22,698	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	17,647	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	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	'		'	'		'	'	'	9,305	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	7,643	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	24,471	[1]	'	24,471	[1]	'	'	'	26,952	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	12,544	[1]	'	12,544	[1]	'	'	'	9,678	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	8,432	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	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	'		'	'		'	'	'	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	'		'	'		'	'	'	9,389	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	31,241	[1]	'	31,241	[1]	'	'	'	40,734	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	5,916	[1]	'	5,916	[1]	'	'	'	11,196	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	300	[1]
Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	3,319	[1]
Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	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]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	641	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	0	[1]
Other Recorded Investment Resulting From Following Modification [Member] | ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0	[1]	'	0	[1]	'	'	'	1	[1]
Other Recorded Investment Resulting From Following Modification [Member] | ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	4,951	[1]	'	4,951	[1]	'	'	'	4,261	[1]
Other Recorded Investment Resulting From Following Modification [Member] | Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	4,662	[1]	'	4,662	[1]	'	'	'	1,824	[1]
Multiple Modification Types [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	270,769	[2]	'	270,769	[2]	'	'	'	336,117	[2]
Multiple Modification Types [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	177,104	[2]	'	177,104	[2]	'	'	'	210,110	[2]
Multiple Modification Types [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	93,665	[2]	'	93,665	[2]	'	'	'	126,007	[2]
Multiple Modification Types [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	44,684	[2]
Multiple Modification Types [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	17,379	[2]
Multiple Modification Types [Member] | Owner Occupied [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	13,598	[2]
Multiple Modification Types [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	7,803	[2]
Multiple Modification Types [Member] | Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	54,794	[2]	'	54,794	[2]	'	'	'	58,282	[2]
Multiple Modification Types [Member] | Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	26,360	[2]	'	26,360	[2]	'	'	'	25,182	[2]
Multiple Modification Types [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	30,248	[2]
Multiple Modification Types [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	68,481	[2]
Multiple Modification Types [Member] | Term [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	82,809	[2]
Multiple Modification Types [Member] | Term [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	17,718	[2]
Multiple Modification Types [Member] | Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	86,907	[2]	'	86,907	[2]	'	'	'	113,057	[2]
Multiple Modification Types [Member] | Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	49,788	[2]	'	49,788	[2]	'	'	'	86,199	[2]
Multiple Modification Types [Member] | Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	218	[2]
Multiple Modification Types [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	36,199	[2]
Multiple Modification Types [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	14,240	[2]
Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	2,354	[2]
Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	243	[2]
Multiple Modification Types [Member] | ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0	[2]	'	0	[2]	'	'	'	0	[2]
Multiple Modification Types [Member] | ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0	[2]
Multiple Modification Types [Member] | Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	35,403	[2]	'	35,403	[2]	'	'	'	38,771	[2]
Multiple Modification Types [Member] | Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	17,517	[2]	'	17,517	[2]	'	'	'	14,626	[2]
Interest Rate Below Market [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	87,012		'	87,012		'	'	'	91,884
Interest Rate Below Market [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	62,545		'	62,545		'	'	'	61,743
Interest Rate Below Market [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	24,467		'	24,467		'	'	'	30,141
Interest Rate Below Market [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	5,388
Interest Rate Below Market [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	318
Interest Rate Below Market [Member] | Owner Occupied [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	20,963
Interest Rate Below Market [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	3,822
Interest Rate Below Market [Member] | Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	22,476		'	22,476		'	'	'	26,351
Interest Rate Below Market [Member] | Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	5,705		'	5,705		'	'	'	4,140
Interest Rate Below Market [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	1,718
Interest Rate Below Market [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	18,255
Interest Rate Below Market [Member] | Term [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	30,118
Interest Rate Below Market [Member] | Term [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	3,042
Interest Rate Below Market [Member] | Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	36,544		'	36,544		'	'	'	31,836
Interest Rate Below Market [Member] | Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	14,302		'	14,302		'	'	'	21,297
Interest Rate Below Market [Member] | Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	744
Interest Rate Below Market [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	2,665
Interest Rate Below Market [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	4,697
Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	147
Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	7
Interest Rate Below Market [Member] | ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	0
Interest Rate Below Market [Member] | ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Interest Rate Below Market [Member] | Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	3,525		'	3,525		'	'	'	3,556
Interest Rate Below Market [Member] | Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	4,460		'	4,460		'	'	'	4,704
Principal Forgiveness [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	27,612		'	27,612		'	'	'	29,033
Principal Forgiveness [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	23,108		'	23,108		'	'	'	20,323
Principal Forgiveness [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	4,504		'	4,504		'	'	'	8,710
Principal Forgiveness [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Owner Occupied [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	654
Principal Forgiveness [Member] | Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	994		'	994		'	'	'	0
Principal Forgiveness [Member] | Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	1,142		'	1,142		'	'	'	654
Principal Forgiveness [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	2
Principal Forgiveness [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Term [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	8,433
Principal Forgiveness [Member] | Term [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	5,331		'	5,331		'	'	'	8,435
Principal Forgiveness [Member] | Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	0
Principal Forgiveness [Member] | Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	5,965
Principal Forgiveness [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	5,923
Principal Forgiveness [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	4,048
Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	0
Principal Forgiveness [Member] | ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	0
Principal Forgiveness [Member] | ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Principal Forgiveness [Member] | Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	16,783		'	16,783		'	'	'	11,888
Principal Forgiveness [Member] | Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	3,362		'	3,362		'	'	'	8,056
Payment Deferral [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	23,380		'	23,380		'	'	'	19,609
Payment Deferral [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	17,350		'	17,350		'	'	'	11,611
Payment Deferral [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	6,030		'	6,030		'	'	'	7,998
Payment Deferral [Member] | Commercial And Industrial [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	3,585
Payment Deferral [Member] | Commercial And Industrial [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	'		'	'		'	'	'	480
Payment Deferral [Member] | Owner Occupied [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	4,013
Payment Deferral [Member] | Owner Occupied [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	4,701
Payment Deferral [Member] | Commercial Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	9,817		'	9,817		'	'	'	7,598
Payment Deferral [Member] | Commercial Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	3,979		'	3,979		'	'	'	5,181
Payment Deferral [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	59
Payment Deferral [Member] | Commercial Real Estate Construction Financing Receivable [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Payment Deferral [Member] | Term [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	3,807
Payment Deferral [Member] | Term [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	2,645
Payment Deferral [Member] | Commercial Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	6,886		'	6,886		'	'	'	3,866
Payment Deferral [Member] | Commercial Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	2,051		'	2,051		'	'	'	2,645
Payment Deferral [Member] | Home Equity Line of Credit [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	0
Payment Deferral [Member] | One Through Four Family Residential [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	147
Payment Deferral [Member] | One Through Four Family Residential [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	'		'	'		'	'	'	0
Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	0
Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	'		'	'		'	'	'	0
Payment Deferral [Member] | ERROR in label resolution. | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	0
Payment Deferral [Member] | ERROR in label resolution. | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	'		'	'		'	'	'	172
Payment Deferral [Member] | Consumer Loan [Member] | Accruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	647		'	647		'	'	'	147
Payment Deferral [Member] | Consumer Loan [Member] | Nonaccruing [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	172
Nonaccruing [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	26,569		'	26,569		'	'	'	'
Nonaccruing [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	33,590		'	33,590		'	'	'	'
Nonaccruing [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	59,171		'	59,171		'	'	'	'
Nonaccruing [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	14,636		'	14,636		'	'	'	'
Nonaccruing [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	1,927		'	1,927		'	'	'	'
Nonaccruing [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	28,455		'	28,455		'	'	'	'
Nonaccruing [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	1,965		'	1,965		'	'	'	'
Nonaccruing [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	260		'	260		'	'	'	287
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	8,958		'	8,958		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	1,471		'	1,471		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	1,750		'	1,750		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	0		'	0		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	1,420		'	1,420		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	926		'	926		'	'	'	'
Nonaccruing [Member] | Maturity Or Term Extension [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	260		'	260		'	'	'	287
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	1,362	[1]	'	1,362	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	11,182	[1]	'	11,182	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	5,591	[1]	'	5,591	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	325	[1]	'	325	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	222	[1]	'	222	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	4,440	[1]	'	4,440	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	0	[1]	'	0	[1]	'	'	'	'
Nonaccruing [Member] | Other Recorded Investment Resulting From Following Modification [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0	[1]	'	0	[1]	'	'	'	0	[1]
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	13,416	[2]	'	13,416	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	12,944	[2]	'	12,944	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	40,008	[2]	'	40,008	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	9,780	[2]	'	9,780	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	130	[2]	'	130	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	16,353	[2]	'	16,353	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	1,034	[2]	'	1,034	[2]	'	'	'	'
Nonaccruing [Member] | Multiple Modification Types [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0	[2]	'	0	[2]	'	'	'	0	[2]
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	2,609		'	2,609		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	3,096		'	3,096		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	11,822		'	11,822		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	2,480		'	2,480		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	0		'	0		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	4,455		'	4,455		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	5		'	5		'	'	'	'
Nonaccruing [Member] | Interest Rate Below Market [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0		'	0		'	'	'	0
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	68		'	68		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	1,074		'	1,074		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	1,575		'	1,575		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	1,787		'	1,787		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	0		'	0		'	'	'	'
Nonaccruing [Member] | Principal Forgiveness [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	0		'	0		'	'	'	0
Nonaccruing [Member] | Payment Deferral [Member] | Commercial And Industrial [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans Receivable, Gross, Commercial and Industrial	156		'	156		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | Owner Occupied [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	3,823		'	3,823		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | Commercial Real Estate Construction Financing Receivable [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	0		'	0		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | Term [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Financing Receivable, Modifications, Recorded Investment	2,051		'	2,051		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | Home Equity Line of Credit [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Home Equity	0		'	0		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | One Through Four Family Residential [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Mortgage	0		'	0		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | Construction And Other Consumer Real Estate [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Construction	0		'	0		'	'	'	'
Nonaccruing [Member] | Payment Deferral [Member] | Revolving Credit Facility [Member]	'		'	'		'	'	'	'
Financing Receivable, Modifications [Line Items]	'		'	'		'	'	'	'
Loans and Leases Receivable, Gross, Consumer, Revolving, Credit Card	$0		'	$0		'	'	'	$0
[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_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 $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Loans And Allowance For Credit Losses [Abstract]	'	'
Commercial	$164,760	$227,414
Commercial real estate	254,507	382,068
Consumer	31,675	41,398
Outstanding balance	450,942	650,880
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Carrying Amount, Net	334,473	472,040
ALLL	5,077	12,077
Carrying amount, net	$329,396	$459,963

Recovered_Sheet5

Loans And Allowance For Credit Losses (Schedule Of Changes In The Accretable Yield For PCI Loans) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Changes in Accretable Yield [Roll Forward]	'	'	'	'
Balance at beginning of period	$104,483	$157,040	$134,461	$184,679
Accretion	-19,941	-25,409	-78,994	-69,824
Reclassification from nonaccretable difference	7,908	9,565	31,092	25,112
Disposals and other	3,308	3,550	9,199	4,779
Balance at end of period	$95,758	$144,746	$95,758	$144,746

Recovered_Sheet6

Loans And Allowance For Credit Losses (Schedule Of Changes In The FDIC Indemnification Asset) (Details) (USD $)

3 Months Ended

9 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2012

Dec. 31, 2011

Loans And Allowance For Credit Losses [Abstract]

'

'

'

'

'

'

'

'

FDIC Indemnification Asset

$41,771

$100,906

$41,771

$100,906

$51,297

$90,929

$117,167

$133,810

FDIC Indemnification Asset [Roll Forward]

'

'

'

'

'

'

'

'

Amounts filed with the FDIC and collected or in process

5,507

[1]

3,904

[1]

15,267

[1]

15,106

[1]

'

'

'

'

Net change in asset balance due to reestimation of projected cash flows

($15,033)

[2]

($20,165)

[2]

($64,425)

[2]

($48,010)

[2]

'

'

'

'

[1]

1B The FDICbs reimbursement process requires that submitted expenses be paid, not just incurred, to qualify for reimbursement.

[2]

Negative amounts result from the accretion of loan balances based on increases in cash flow estimates and on prepayments.

Derivative_Instruments_And_Hed2

Derivative Instruments And Hedging Activities (Narrative) (Details) (USD $)

0 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Jul. 28, 2010

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Sep. 30, 2013

Dec. 31, 2012

Total Return Swap [Member]

Interest Rate Swaps [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Other Liabilities [Member]

Other Liabilities [Member]

Other Liabilities [Member]

Other Liabilities [Member]

Other Liabilities [Member]

Other Liabilities [Member]

Total Return Swap [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Cash Flow Hedging [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivatives Designated As Hedging Instruments [Member]

Derivative Liabilities Included Other liabilities [Member]

Derivative Liabilities Included Other liabilities [Member]

Derivative [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments in Hedges, Net Investment in Foreign Operations, Assets, Fair Value

$0

$0

'

$0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Losses on derivative instruments from counterparty nonperformance

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net

'

97,000

2,378,000

2,479,000

10,871,000

'

'

'

97,000

2,378,000

2,479,000

10,871,000

'

97,000

2,378,000

2,479,000

[1]

10,871,000

[1]

'

'

'

'

'

'

Derivative Liability, Fair Value, Gross Liability

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

59,914,000

89,100,000

0

0

59,914,000

89,100,000

Fair values of derivative assets reduced (increased) by net credit valuation adjustments

2,400,000

2,400,000

5,200,000

2,400,000

5,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fair values of derivative liabilities reduced (increased) by net credit valuation adjustments

2,000,000

2,000,000

100,000

2,000,000

100,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total derivatives, Notional amount

4,029,137,000

4,029,137,000

'

4,029,137,000

'

4,015,813,000

'

1,160,000,000

75,000,000

'

75,000,000

'

150,000,000

'

'

'

'

'

'

'

'

'

'

Expected net quarterly costs

'

'

'

'

'

'

5,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cash collateral pledged for derivative liabilities

48,300,000

48,300,000

'

48,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Additional collateral that would be required to be pledge if credit rating was downgraded by one notch

$2,000,000

$2,000,000

'

$2,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

Amounts for the three and nine months ended SeptemberB 30 of $0.1 million and $2.5 million in 2013, and $2.4 million and $10.9 million in 2012, respectively, are the amounts of reclassification to earnings from AOCI presented in Note 7.

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 $)	3 Months Ended				9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Dec. 31, 2012
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	$4,029,137		'		$4,029,137		'		$4,015,813
Amount of derivative gain (loss), recognized in OCI	414		84		408		390		'
Amount of derivative gain (loss), Reclassified from AOCI to interest income	97		2,378		2,479		10,871		'
Derivatives instruments, Noninterest income (expense)	-3,692		-4,248		-9,039		-14,682		'
Derivatives designated as hedging instruments, Offset to interest expense	796		771		2,342		2,277		'
Cash Flow Hedging [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives instruments, Noninterest income (expense)	0		0		0		0		'
Other Assets [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	55,568		'		55,568		'		81,810
Other Liabilities [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, liabilities	59,914		'		59,914		'		89,100
Derivatives Designated As Hedging Instruments [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	75,000		'		75,000		'		150,000
Amount of derivative gain (loss), recognized in OCI	414		84		408		390		'
Amount of derivative gain (loss), Reclassified from AOCI to interest income	97		2,378		2,479		10,871		'
Derivatives instruments, Noninterest income (expense)	0		0		0		0		'
Derivatives designated as hedging instruments, Offset to interest expense	796		771		2,342		2,277		'
Derivatives Designated As Hedging Instruments [Member] | Cash Flow Hedging [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Amount of derivative gain (loss), recognized in OCI	414		84		408		390		'
Amount of derivative gain (loss), Reclassified from AOCI to interest income	97		2,378		2,479	[1]	10,871	[1]	'
Derivatives Designated As Hedging Instruments [Member] | Other Assets [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	411		'		411		'		1,188
Derivatives Designated As Hedging Instruments [Member] | Other Liabilities [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, liabilities	0		'		0		'		0
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Cash Flow Hedging [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	75,000	[2]	'		75,000	[2]	'		150,000	[2]
Amount of derivative gain (loss), recognized in OCI	414	[2]	84	[2]	408	[2]	390	[2]	'
Amount of derivative gain (loss), Reclassified from AOCI to interest income	97	[2]	2,378	[2]	2,479	[2]	10,871	[2]	'
Derivatives instruments, Noninterest income (expense)	0		0		0		0		'
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member] | Cash Flow Hedging [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	411	[2]	'		411	[2]	'		1,188	[2]
Derivatives Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member] | Cash Flow Hedging [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, liabilities	0	[2]	'		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	796		771		2,342		2,277		'
Derivatives Not Designated As Hedging Instruments [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	3,954,137		'		3,954,137		'		3,865,813
Derivatives instruments, Noninterest income (expense)	-3,692		-4,248		-9,039		-14,682		'
Derivatives Not Designated As Hedging Instruments [Member] | Other Assets [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	55,157		'		55,157		'		80,622
Derivatives Not Designated As Hedging Instruments [Member] | Other Liabilities [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, liabilities	59,914		'		59,914		'		89,100
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	65,850		'		65,850		'		98,524
Derivatives instruments, Noninterest income (expense)	765		-174		678		-302		'
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Assets [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	517		'		517		'		1,043
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps [Member] | Other Liabilities [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, liabilities	565		'		565		'		1,047
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	2,728,601	[3]	'		2,728,601	[3]	'		2,607,603	[3]
Derivatives instruments, Noninterest income (expense)	883	[3]	1,331	[3]	6,631	[3]	1,917	[3]	'
Derivatives Not Designated As Hedging Instruments [Member] | Interest Rate Swaps For Customers [Member] | Other Assets [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	54,640	[3]	'		54,640	[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	55,110	[3]	'		55,110	[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		-2		2		-12		'
Derivatives Not Designated As Hedging Instruments [Member] | Total Return Swap [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Total derivatives, Notional amount	1,159,686		'		1,159,686		'		1,159,686
Derivatives instruments, Noninterest income (expense)	-5,342		-5,403		-16,350		-16,303		'
Derivatives Not Designated As Hedging Instruments [Member] | Total Return Swap [Member] | Other Assets [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, assets	0		'		0		'		0
Derivatives Not Designated As Hedging Instruments [Member] | Total Return Swap [Member] | Other Liabilities [Member]	'		'		'		'		'
Derivative [Line Items]	'		'		'		'		'
Derivatives hedging instruments, liabilities	$4,239		'		$4,239		'		$5,127
[1]	Amounts for the three and nine months ended SeptemberB 30 of $0.1 million and $2.5 million in 2013, and $2.4 million and $10.9 million in 2012, respectively, are the amounts of reclassification to earnings from AOCI presented in Note 7.
[2]	Amounts recognized in OCI and reclassified from accumulated OCI (bAOCIb) represent the effective portion of the derivative gain (loss).
[3]	Amounts include both the customer swaps and the offsetting derivative contracts.

Debt_And_Shareholders_Equity_N

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

0 Months Ended

3 Months Ended

9 Months Ended

9 Months Ended

0 Months Ended

9 Months Ended

0 Months Ended

0 Months Ended

0 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

9 Months Ended

0 Months Ended

Oct. 31, 2013

Sep. 16, 2013

Sep. 12, 2013

Jun. 13, 2013

Jun. 03, 2013

Sep. 30, 2013

Sep. 30, 2012

Jun. 30, 2009

Sep. 30, 2013

Sep. 30, 2012

Sep. 15, 2023

Nov. 15, 2018

Nov. 06, 2013

Jun. 18, 2013

3-May-13

Dec. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 16, 2013

6-May-13

Sep. 30, 2013

Jun. 15, 2023

17-May-13

Mar. 15, 2023

Feb. 07, 2013

Feb. 07, 2013

3-May-13

Aug. 02, 2013

Sep. 15, 2023

Aug. 11, 2013

Aug. 07, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Jun. 13, 2013

Jun. 13, 2013

Sep. 30, 2013

Jun. 18, 2013

Aug. 02, 2013

Aug. 02, 2013

Nov. 06, 2013

Nov. 06, 2013

Preferred Stock [Member]

Series C Preferred Stock [Member]

Series C Preferred Stock [Member]

Series C Preferred Stock [Member]

Series I Preferred Stock [Member]

Series I Preferred Stock [Member]

Series F Preferred Stock [Member]

Series F Preferred Stock [Member]

Series G Preferred Stock [Member]

Series H Preferred Stock [Member]

Series A Preferred Stock [Member]

Series J Preferred Stock [Member]

Series J Preferred Stock [Member]

Series J Preferred Stock [Member]

Long-Term Senior Notes [Member]

Long-Term Senior Notes [Member]

Minimum [Member]

Maximum [Member]

Short-Term Senior [Member]

$300 Million Senior Long-Term Note [Member]

$500 Million Senior Long-Term Note [Member]

$500 Million Senior Long-Term Note [Member]

$500 Million Senior Long-Term Note [Member]

LIBOR Plus Zero Point Five Two [Member]

Four Percent [Member]

Maximum [Member]

Minimum [Member]

Series A Preferred Stock [Member]

Series A Preferred Stock [Member]

Debt And Shareholders' Equity [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests

'

'

'

'

$4,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Redeemed or Called During Period, Value

'

'

'

'

'

'

'

'

'

-1,542,500,000

'

'

'

'

'

'

'

'

800,000,000

926,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other Comprehensive Income (Loss), before Reclassifications, Net of Tax

'

'

'

'

'

'

'

'

49,228,000

56,748,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Allowance for loan losses transfered from commerical loans to commercial real estate loans from modified reporting

'

'

'

'

'

'

83,100,000

'

'

83,100,000

'

'

'

'

'

83,000,000

68,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trust Preferred Securities Rate, Redeemed

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Trust Preferred Securities, Shares Redeemed

'

'

'

'

'

'

'

'

'

'

'

'

'

'

11,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Liquidation Preference, Value

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Liquidation Preference Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Cumulative perpetual preferred stock value, issued

'

'

'

'

'

1,003,970,000

'

'

1,003,970,000

'

'

'

'

'

'

1,128,302,000

'

'

'

'

'

'

301,000,000

'

'

'

'

6,000,000

'

'

195,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of notes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

18,000,000

'

'

'

5,000,000

'

'

'

'

'

'

'

'

Dividends on common stock, per share

'

'

'

'

'

'

'

'

$0.09

$0.03

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt issuance amount during period

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

29,000,000

97,000,000

'

'

'

'

'

'

'

'

'

'

'

Interest rate on senior notes

5.70%

'

7.00%

'

'

'

'

'

'

'

3.90%

4.20%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.55%

5.50%

'

4.50%

7.75%

'

'

'

'

6.00%

5.50%

Debt Instrument, Maturity Date

'

'

'

'

'

'

'

'

1-Nov-19

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

23-Sep-14

'

'

'

'

'

Proceeds from Issuance of Long-term Debt

160,000,000

'

86,000,000

'

'

116,461,000

49,082,000

'

484,408,000

648,468,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from Issuance of Senior Long-term Debt

'

'

'

297,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gains (Losses) on Extinguishment of Debt

'

'

'

'

'

0

0

'

40,282,000

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost

'

'

'

'

'

'

'

'

22,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Write off of Deferred Debt Issuance Cost

'

'

'

'

'

'

'

'

17,400,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Document Fiscal Year Focus

'

'

'

'

'

'2013

'

'

'2013

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Issuance Cost

162,000,000

'

88,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

'

'

'

'

'

'

'

Stockholders' Equity [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible subordinated debt converted into depositary shares

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible preferred stock, shares issued upon conversion

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,210

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock outstanding under conversion feature

'

'

'

'

'

77,000,000

'

'

77,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Convertible subordinated debt, at par

'

'

'

'

'

457,000,000

'

'

457,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt discount

'

'

'

'

'

113,000,000

'

'

113,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock Issued During Period, Value, New Issues

'

'

'

'

'

'

'

'

800,000,000

141,342,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Issuance of preferred stock

'

'

'

'

'

'

'

'

784,373,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

172,000,000

'

126,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Shares Issued

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,893

'

'

171,827

126,221

5,907

'

'

195,152

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Par or Stated Value Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$1,000

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred stock, dividend rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9.50%

'

'

3.80%

5.80%

4.24%

6.30%

'

5.75%

'

4.44%

7.20%

'

'

'

'

'

'

'

'

'

'

0.52%

4.00%

'

'

Stock Redeemed or Called During Period, Shares

'

799,467

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Redemption Price Per Share

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred Stock, Value, Outstanding

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

126,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Convertible, Beneficial Conversion Feature

'

'

'

'

'

0

917,000

203,000,000

206,000

14,519,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Preferred stock redemption value, net

'

'

'

'

'

'

'

'

'

'

'

'

'

'

285,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Repurchased Face Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

258,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior Notes

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

500,000,000

'

'

'

'

Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax

'

'

'

'

'

'

'

'

12,426,000

598,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Par Amount of Convertible and Nonconvertible Subordinated Notes Offered to Purchase

'

'

'

'

'

'

'

'

'

'

'

'

$250,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt_And_Shareholders_Equity_S

Debt And Shareholders' Equity (Schedule Of Changes In Accumulated Other Comprehensive Income (Loss)) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Document Fiscal Year Focus	'2013	'	'2013	'
Interest income expense, net, after tax	$209,707,000	$62,322,000	$353,416,000	$143,026,000
Income Tax Expense (Benefit)	61,107,000	60,704,000	164,832,000	163,599,000
Interest Income (Expense), Net	415,521,000	438,161,000	1,264,293,000	1,301,983,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	9,067,000	2,736,000	23,401,000	20,253,000
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	49,228,000	56,748,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	12,426,000	598,000
Beginning balance	'	'	-446,157,000	-592,084,000
Other comprehensive income (loss)	-9,947,000	41,409,000	61,654,000	57,346,000
Ending balance	-384,503,000	-534,738,000	-384,503,000	-534,738,000
Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	48,992,000	56,523,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	13,909,000	7,152,000
Beginning balance	'	'	-397,616,000	-546,763,000
Other comprehensive income (loss)	'	'	62,901,000	63,675,000
Ending balance	-334,715,000	-483,088,000	-334,715,000	-483,088,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	236,000	225,000
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	-1,483,000	-6,554,000
Beginning balance	'	'	1,794,000	9,404,000
Other comprehensive income (loss)	'	'	-1,247,000	-6,329,000
Ending balance	547,000	3,075,000	547,000	3,075,000
Accumulated Defined Benefit Plans Adjustment [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	'	'	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	'	'	0	0
Beginning balance	'	'	-50,335,000	-54,725,000
Other comprehensive income (loss)	'	'	0	0
Ending balance	-50,335,000	-54,725,000	-50,335,000	-54,725,000
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Gain (Loss) on Investments, Excluding Other than Temporary Impairments	1,580,000	3,046,000	3,726,000	9,285,000
Interest income expense, net, after tax	-5,588,000	-1,690,000	-14,136,000	-12,296,000
Income Tax Expense (Benefit)	-3,479,000	-1,046,000	-8,863,000	-7,616,000
Other than temporary impairment losses investments accretion of noncreidt portion held to maturity securities, after tax	-5,319,000	-1,000	-13,909,000	-7,152,000
Other than temporary impairment losses investments accretion of noncredit portion held to maturity securities, tax	-211,000	123,000	-597,000	472,000
Other than Temporary Impairment Losses, Investments, Accretion of Noncredit Portion, Held-to-maturity Securities, before Tax	-496,000	-315,000	-1,477,000	-1,196,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	-9,067,000	-2,736,000	-22,999,000	-19,912,000
Interest Rate Contract [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Interest income expense, net, after tax	57,000	1,421,000	1,483,000	6,554,000
Income Tax Expense (Benefit)	40,000	957,000	996,000	4,317,000
Interest Income (Expense), Net	97,000	2,378,000	2,479,000	10,871,000
Fixed income securities gain loss [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Net Unrealized Investment Gain (Loss) [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Interest income expense, net, after tax	976,000	1,881,000	2,301,000	5,868,000
Income Tax Expense (Benefit)	604,000	1,165,000	1,425,000	3,417,000
Long-term Debt [Member]	'	'	'	'
Debt And Shareholders' Equity [Line Items]	'	'	'	'
Debt Instrument, Face Amount 1	$29,000,000	'	$97,000,000	'

Income_Taxes_Details

Income Taxes (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Income Tax Disclosure [Abstract]	'	'
Net deferred tax assets	$367	$406

Fair_Value_Narrative_Details

Fair Value (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair Value Level Transfers Among Levels 1, 2, and 3	0	0	0	0	'
Other noninterest-bearing investments valued under the cost method	$56,000,000	'	$56,000,000	'	$74,800,000
Federal Home Loan Bank Stock and Federal Reserve Bank Stock	248,600,000	'	248,600,000	'	255,600,000
Percentage of bank issuers are public companies	32.00%	'	'	'	'
Probability of Default, Number of Basis Points for Year One	'	'	3000.00%	'	'
Probability Of Default Increase To Number Of Base Points For Each Year From Year Two To Five	'	'	4800.00%	'	'
Probability of default, minimum number of basis points for year six	'	'	6500.00%	'	'
Weighted average assumed loss rate on deferring collateral	66.00%	'	66.00%	'	'
Weighted Average Assumed Loss Rate on Deferring Collateral Using December 31, 2012 PD Overlay Model for Deferrals	55.00%	'	55.00%	'	'
Net gains on sale of OREO properties	1,824,000	-309,000	1,332,000	-13,650,000	'
Principal amount of other real estate owned property sold	'	'	61,100,000	126,000,000	'
Highest Quality/Most Over-Collateralized Insurance-Only Tranches Discount Rate [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Valuations for bank and insurance tranches utilized a discount rate range of LIBOR	3.75%	'	'	'	'
Lowest Credit Quality Tranche Discount Rate [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Valuations for bank and insurance tranches utilized a discount rate range of LIBOR	19.20%	'	'	'	'
AAA [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Percentage of difference between rated bonds	5.00%	'	'	'	'
BBB [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Percentage of difference between rated bonds	13.00%	'	'	'	'
A-Rated Bonds [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Percentage of difference between rated bonds	8.00%	'	'	'	'
OREO Properties [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Net gains on sale of OREO properties	3,500,000	5,600,000	9,800,000	11,400,000	'
Impairment of OREO properties	-200,000	-3,300,000	-600,000	-7,200,000	'
Minimum [Member] | Highest Quality/Most Over-Collateralized Insurance-Only Tranches Discount Rate [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Valuations for bank and insurance tranches utilized a discount rate range of LIBOR	5.70%	'	'	'	'
Best [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Percentage of resulting five-year PDs	2.18%	'	2.18%	'	'
Worst [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Percentage of resulting five-year PDs	100.00%	'	100.00%	'	'
First Priority Original AAA-Rated Bonds Discount Rate [Member] | Minimum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	5.70%	'	5.70%	'	'
Lower Priority Original AAA-Rated Bonds Discount Rate [Member] | Minimum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	5.70%	'	5.70%	'	'
Lower Priority Original AAA-Rated Bonds Discount Rate [Member] | Maximum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	6.70%	'	6.70%	'	'
Lower Priority Original AAA-Rated Bonds Discount Rate [Member] | Weighted Average [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate average of LIBOR utilized for fair value purposes	5.80%	'	5.80%	'	'
Original A-Rated Bonds Discount Rate [Member] | Minimum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	6.00%	'	6.00%	'	'
Original A-Rated Bonds Discount Rate [Member] | Maximum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	14.80%	'	14.80%	'	'
Original A-Rated Bonds Discount Rate [Member] | Weighted Average [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate average of LIBOR utilized for fair value purposes	9.40%	'	9.40%	'	'
Original BBB-Rated Bonds Discount Rate [Member] | Minimum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	10.40%	'	10.40%	'	'
Original BBB-Rated Bonds Discount Rate [Member] | Maximum [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate range of LIBOR utilized for fair value purposes	19.20%	'	19.20%	'	'
Original BBB-Rated Bonds Discount Rate [Member] | Weighted Average [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Discount rate average of LIBOR utilized for fair value purposes	15.70%	'	15.70%	'	'
Level 2 [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	1,988,904,000	'	1,988,904,000	'	1,765,214,000
Level 2 [Member] | Available-for-sale Securities [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	2,000,000,000	'	2,000,000,000	'	'
Level 3 [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	1,055,105,000	'	1,055,105,000	'	1,003,900,000
Level 3 [Member] | Available-for-sale Securities [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	1,100,000,000	'	1,100,000,000	'	'
Level 3 [Member] | Municipal Securities [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	52,000,000	'	52,000,000	'	'
Level 3 [Member] | Other (Including ABS CDOs) [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	0	'	0	'	'
Third Party Pricing Service [Member] | Level 2 [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	1,900,000,000	'	1,900,000,000	'	'
Third Party Pricing Service [Member] | Level 3 [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	81,000,000	'	81,000,000	'	'
Licensed Internal Third Party [Member] | Level 3 [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	1,000,000,000	'	1,000,000,000	'	'
Market Corroborative Data [Member] | Level 2 [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	6,000,000	'	6,000,000	'	'
Market Corroborative Data [Member] | Level 2 [Member] | FAMC Securities [Member]	'	'	'	'	'
Derivatives, Fair Value [Line Items]	'	'	'	'	'
Fair value of AFS securities	$108,000,000	'	$108,000,000	'	'

Fair_Value_Schedule_Of_Assets_

Fair Value (Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair Value Level Transfers Among Levels 1, 2, and 3	0	0	0	0	'
Trading account	$38,278	'	$38,278	'	$28,290
Securities sold, not yet purchased	21,183	'	21,183	'	26,735
Level 1 [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	289,880	'	289,880	'	322,196
Total assets	299,767	'	299,767	'	326,600
Securities sold, not yet purchased	21,183	'	21,183	'	26,735
Total liabilities	29,886	'	29,886	'	29,894
Level 1 [Member] | Mutual Funds And Other [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	251,382	'	251,382	'	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	38,498	'	38,498	'	102,982
Level 1 [Member] | Derivatives [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other assets	9,887	'	9,887	'	4,404
Other liabilities	8,703	'	8,703	'	3,159
Level 1 [Member] | Derivatives [Member] | Foreign Currency Exchange Contracts [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other assets	9,887	'	9,887	'	4,404
Other liabilities	8,703	'	8,703	'	3,159
Level 2 [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	1,988,904	'	1,988,904	'	1,765,214
Trading account	38,278	'	38,278	'	28,290
Total assets	2,552,061	'	2,552,061	'	2,336,784
Securities sold, not yet purchased	'	'	'	'	'
Total liabilities	55,971	'	55,971	'	84,068
Level 2 [Member] | Mutual Funds And Other [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	5,649	'	5,649	'	8,797
Level 2 [Member] | Bank-owned life insurance [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other noninterest-bearing investments	464,180	'	464,180	'	455,719
Level 2 [Member] | Private Equity [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other noninterest-bearing investments	4,992	'	4,992	'	5,132
Level 2 [Member] | Available-for-sale Securities [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	2,000,000	'	2,000,000	'	'
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	1,929,039	'	1,929,039	'	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	51,649	'	51,649	'	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] | 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	2,567	'	2,567	'	'
Level 2 [Member] | Derivatives [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other assets	55,707	'	55,707	'	82,429
Other liabilities	55,971	'	55,971	'	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	1,067	'	1,067	'	2,850
Other liabilities	861	'	861	'	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	54,640	'	54,640	'	79,579
Other liabilities	55,110	'	55,110	'	82,926
Level 3 [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	1,055,105	'	1,055,105	'	1,003,900
Total assets	1,132,661	'	1,132,661	'	1,068,123
Other liabilities	197	'	197	'	124
Total liabilities	4,436	'	4,436	'	5,251
Level 3 [Member] | Private Equity [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other noninterest-bearing investments	77,556	'	77,556	'	64,223
Level 3 [Member] | Available-for-sale Securities [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	1,100,000	'	1,100,000	'	'
Level 3 [Member] | Available-for-sale Securities [Member] | Municipal Securities [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	13,520	'	13,520	'	16,551
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	1,001,896	'	1,001,896	'	949,271
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	19,517	'	19,517	'	16,403
Level 3 [Member] | Asset-Backed Securities [Member] | Auction Rate Securities [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	6,625	'	6,625	'	6,515
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
Level 3 [Member] | Asset-Backed Securities [Member] | Other [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	13,547	'	13,547	'	'
Level 3 [Member] | Derivatives [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other liabilities	4,239	'	4,239	'	5,127
Level 3 [Member] | Derivatives [Member] | Total Return Swap [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other liabilities	4,239	'	4,239	'	5,127
Estimated Fair Value [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	3,333,889	'	3,333,889	'	3,091,310
Trading account	38,278	'	38,278	'	28,290
Total assets	3,984,489	'	3,984,489	'	3,731,507
Securities sold, not yet purchased	21,183	'	21,183	'	26,735
Other liabilities	197	'	197	'	124
Total liabilities	90,293	'	90,293	'	119,213
Estimated Fair Value [Member] | Mutual Funds And Other [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	257,031	'	257,031	'	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	464,180	'	464,180	'	455,719
Estimated Fair Value [Member] | Private Equity [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other noninterest-bearing investments	82,548	'	82,548	'	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	1,967,537	'	1,967,537	'	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	65,169	'	65,169	'	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	1,001,896	'	1,001,896	'	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	19,517	'	19,517	'	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	6,625	'	6,625	'	6,515
Estimated Fair Value [Member] | Asset-Backed Securities [Member] | Other [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Investment securities	16,114	'	16,114	'	19,374
Estimated Fair Value [Member] | Derivatives [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other assets	65,594	'	65,594	'	86,833
Other liabilities	68,913	'	68,913	'	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	1,067	'	1,067	'	2,850
Other liabilities	861	'	861	'	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	54,640	'	54,640	'	79,579
Other liabilities	55,110	'	55,110	'	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	9,887	'	9,887	'	4,404
Other liabilities	8,703	'	8,703	'	3,159
Estimated Fair Value [Member] | Derivatives [Member] | Total Return Swap [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Other liabilities	$4,239	'	$4,239	'	$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) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	$1,153,443	[1]
Trust Preferred - Predominantly Banks [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	857,021
Asset-backed securities, Loss severity	100.00%
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]	'
Assets-backed securities, Fair value	273,420
Asset-backed securities, Loss severity	100.00%
Asset-backed securities, Prepayment rate	5.00%
Trust Preferred - Individual Banks [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	23,002
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]	'
Assets-backed securities, Fair value	19,518
Asset-backed securities, Prepayment rate	0.00%
Other (Including ABS CDOs) [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	25,197	[2]
Minimum [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%
Minimum [Member] | Other (Including ABS CDOs) [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	70.00%
Maximum [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%
Maximum [Member] | Other (Including ABS CDOs) [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%
Trust Preferred Banks and Insurance [Member] | Available-for-sale Securities [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	1,001,900	[1]
Trust Preferred Banks and Insurance [Member] | Held-to-maturity Securities [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	151,500	[1]
Other including ABS CDOs [Member] [Member] | Available-for-sale Securities [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	13,500	[1]
Other including ABS CDOs [Member] [Member] | Held-to-maturity Securities [Member]	'
Assumption for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement [Line Items]	'
Assets-backed securities, Fair value	$11,700	[1]
Constant Default Rate Year 1 [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [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	0.30%	[3]
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	0.30%	[4]
Constant Default Rate Year 1 [Member] | Minimum [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, Constant default rate	4.30%	[5]
Constant Default Rate Year 1 [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [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	3.52%	[3]
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	0.34%	[4]
Constant Default Rate Year 1 [Member] | Maximum [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, Constant default rate	7.80%	[5]
Constant Default Rate Year 2 to 3 [Member] | Minimum [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, Constant default rate	5.00%	[5]
Constant Default Rate Year 2 to 3 [Member] | Maximum [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, Constant default rate	5.50%	[5]
Constant Default Rate Year 2 to 5 [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [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	0.47%	[3]
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	0.48%	[4]
Constant Default Rate Year 2 to 5 [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [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	1.05%	[3]
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	0.58%	[4]
Constant Default Rate Year 4 to 6 [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, Constant default rate	1.00%	[5]
Constant Default Rate Year 6 to Maturity [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, Constant default rate	0.50%	[5]
Constant Default Rate Year 6 to Maturity [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [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	0.59%	[3]
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%	[4]
Constant Default Rate Year 6 to Maturity [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [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	0.67%	[3]
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	0.54%	[4]
Constant Default Rate Until 2016 [Member] | Minimum [Member] | Trust Preferred - Predominantly Banks [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	7.50%	[6]
Constant Default Rate Until 2016 [Member] | Maximum [Member] | Trust Preferred - Predominantly Banks [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	21.69%	[6]
Constant Default Rate 2016 to Maturity [Member] | Trust Preferred - Predominantly Banks [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	3.00%	[6]
[1]	Includes $1,001.9 million of AFS securities and $151.5 million of HTM securities.
[2]	Includes $13.5 million of AFS securities and $11.7 million of HTM securities.
[3]	CDR ranges: yr 1 b 0.30% to 3.52%; yrs 2-5 b 0.47% to 1.05%; yrs 6 to maturity b 0.59% to 0.67%.
[4]	CDR ranges: yr 1 b 0.30% to 0.34%; yrs 2-5 b 0.48% to 0.58%; yrs 6 to maturity b 0.50% to 0.54%.
[5]	CDR ranges: yr 1 b 4.3% to 7.8%; yrs 2-3 b 5.0% to 5.5%; yrs 4-6 b 1.0%; yrs 6 to maturity b 0.50%.
[6]	Constant Prepayment Rate (bCPRb) ranges: 7.50% to 21.69% annually until 2016; 2016 to maturity b 3.0% annually.

Fair_Value_Schedule_Of_Fair_Va

Fair Value (Schedule Of Fair Value Of Predominantly Bank Trust Preferred CDOs) (Details) (USD $)	0 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	$857,021
Percentage of total fair value by vintage	100.00%
AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	63.80%
A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	35.70%
BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.50%
2001 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	36,497
Percentage of total fair value by vintage	4.20%
2001 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	3.10%
2001 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	1.10%
2001 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.00%
2002 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	200,837
Percentage of total fair value by vintage	23.40%
2002 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	20.80%
2002 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	2.60%
2002 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.00%
2003 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	326,412
Percentage of total fair value by vintage	38.20%
2003 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	23.20%
2003 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	14.90%
2003 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.10%
2004 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	179,677
Percentage of total fair value by vintage	21.00%
2004 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	8.30%
2004 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	12.70%
2004 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.00%
2005 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	15,816
Percentage of total fair value by vintage	1.80%
2005 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	1.10%
2005 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.70%
2005 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.00%
2006 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	60,465
Percentage of total fair value by vintage	7.00%
2006 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	2.90%
2006 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	3.70%
2006 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.40%
2007 [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Fair value of predominantly bank trust preferred CDOs	$37,317
Percentage of total fair value by vintage	4.40%
2007 [Member] | AAA [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	4.40%
2007 [Member] | A [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.00%
2007 [Member] | BBB [Member]	'
Financing Receivable, Recorded Investment [Line Items]	'
Percentage of total fair value	0.00%

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 $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013																			Sep. 30, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Derivative Instruments, Gain (Loss) [Table Text Block]	'	'	'																			'
				Three Months Ended September 30, 2013									Nine Months Ended September 30, 2013
				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 3									income 3
			Derivatives designated as hedging instruments
			Asset derivatives
			Cash flow hedges 1:
			Interest rate swaps	$	414	$	97	$	—				$	408	$	2,479	$	—
				414		97		—					408		2,479		—
			Liability derivatives
			Fair value hedges:
			Terminated swaps on long-term debt								$	796								$	2,342
			Total derivatives designated as hedging instruments	414		97		—			796		408		2,479		—			2,342
			Derivatives not designated as hedging instruments
			Interest rate swaps					765									678
			Interest rate swaps for customers 2					883									6,631
			Futures contracts					2									2
			Total return swap					(5,342		)							(16,350		)
			Total derivatives not designated as hedging instruments					(3,692		)							(9,039		)
			Total derivatives	$	414	$	97	$	(3,692	)	$	796	$	408	$	2,479	$	(9,039	)	$	2,342
				Three Months Ended September 30, 2012									Nine Months Ended September 30, 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 3									income 3
			Derivatives designated as hedging instruments
			Asset derivatives
			Cash flow hedges 1:
			Interest rate swaps	$	84	$	2,378	$	—				$	390	$	10,871	$	—
				84		2,378		—					390		10,871		—
			Liability derivatives
			Fair value hedges:
			Terminated swaps on long-term debt								$	771								2,277
			Total derivatives designated as hedging instruments	84		2,378		—			771		390		10,871		—			2,277
			Derivatives not designated as hedging instruments
			Interest rate swaps					(174		)							(302		)
			Interest rate swaps for customers 2					1,331									1,917
			Basis swaps					—									18
			Futures contracts					(2		)							(12		)
			Total return swap					(5,403		)							(16,303		)
			Total derivatives not designated as hedging instruments					(4,248		)							(14,682		)
			Total derivatives	$	84	$	2,378	$	(4,248	)	$	771	$	390	$	10,871	$	(14,682	)	$	2,277
			Note: These tables 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 accumulated OCI (“AOCI”) represent the effective portion of the derivative gain (loss).
			2	Amounts include both the customer swaps and the offsetting derivative contracts.
			3 Amounts for the three and nine months ended September 30 of $0.1 million and $2.5 million in 2013, and $2.4 million and $10.9 million in 2012, respectively, are the amounts of reclassification to earnings from AOCI presented in Note 7.
Total net gains (losses) included in, Other noninterest expense	$64,671	$67,648	$220,884																			$198,365
Municipal Securities [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of assets, Beginning balance	13,544	16,360	16,551																			17,381
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale	10	18	31																			82
Total net gains (losses) included in, Fixed income securities gains (losses), net	2	9	38																			9
Total net gains (losses) included in, Other comprehensive income (loss)	64	136	986																			-499
Total net gains (losses) included in, Redemptions and paydowns	-100	-200	-4,086																			-650
Fair value of assets, Ending balance	13,520	16,323	13,520																			16,323
Trust Preferred - Banks And Insurance [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of assets, Beginning balance	1,030,293	926,450	949,271																			929,356
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale	783	1,239	2,395																			6,267
Total net gains (losses) included in, Fixed income securities gains (losses), net	1,494	3,004	3,530																			10,780
Total net gains (losses) included in, Net impairment losses on investment securities	-7,787	-2,079	-21,548																			-19,255
Total net gains (losses) included in, Other comprehensive income (loss)	-3,934	55,962	127,028																			89,695
Total net gains (losses) included in, Sales	'	'	7,015																			'
Total net gains (losses) included in, Redemptions and paydowns	-18,954	-19,472	-51,766																			-51,739
Fair value of assets, Ending balance	1,001,895	965,104	1,001,895																			965,104
Trust Preferred Securities - Real Estate Investment Trusts [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of assets, Beginning balance	18,499	14,431	16,403																			18,645
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale	64	61	190																			162
Total net gains (losses) included in, Net impairment losses on investment securities	-1,112	'	-1,282																			'
Total net gains (losses) included in, Other comprehensive income (loss)	2,067	915	4,207																			-3,400
Fair value of assets, Ending balance	19,518	15,407	19,518																			15,407
Auction Rate Securities [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of assets, Beginning balance	6,554	7,166	6,515																			70,020
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale	1	1	2																			3
Total net gains (losses) included in, Fixed income securities gains (losses), net	'	'	'																			4,134
Total net gains (losses) included in, Other comprehensive income (loss)	70	-4	108																			1,331
Total net gains (losses) included in, Redemptions and paydowns	'	-50	'																			-68,375
Fair value of assets, Ending balance	6,625	7,113	6,625																			7,113
Other Asset-Backed [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of assets, Beginning balance	17,324	40,666	15,160																			43,546
Total net gains (losses) included in, Accretion of purchase discount on securities available-for-sale	50	53	64																			213
Total net gains (losses) included in, Fixed income securities gains (losses), net	10	11	54																			-5,762
Total net gains (losses) included in, Net impairment losses on investment securities	-168	'	-168																			'
Total net gains (losses) included in, Other comprehensive income (loss)	-476	2,418	4,147																			8,301
Total net gains (losses) included in, Sales	'	'	'																			'
Total net gains (losses) included in, Redemptions and paydowns	-3,193	-2,994	-5,710																			-6,144
Fair value of assets, Ending balance	13,547	40,154	13,547																			40,154
Private Equity Investments [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of assets, Beginning balance	75,517	65,370	64,223																			62,327
Total net gains (losses) included in, Dividends and other investment income	306	3,562	5,455																			9,167
Total net gains (losses) included in, Equity securities gains, net	'	2,556	3,739																			11,629
Total net gains (losses) included in, Purchases	2,064	2,803	5,905																			7,687
Total net gains (losses) included in, Sales	-249	-1,126	-1,369																			-6,478
Total net gains (losses) included in, Redemptions and paydowns	-82	-1,271	-397																			-12,438
Fair value of assets, Ending balance	77,556	71,894	77,556																			71,894
Derivatives [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Derivative Instruments, Gain (Loss) [Table Text Block]	'-5342	'-5403	'-16350																			'-16303
Derivatives [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of liabilities, Beginning balance	-4,829	-5,337	-5,127																			-5,422
Total net gains (losses) included, in Redemptions and paydowns, Liabilities	5,932	-5,692	17,238																			-16,677
Fair value of liabilities, Ending balance	-4,239	-5,048	-4,239																			-5,048
Other Liabilities [Member]	'	'	'																			'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'																			'
Fair value of liabilities, Beginning balance	-289	-121	-124																			-86
Total net gains (losses) included in, Other noninterest expense	92	-7	-73																			-42
Fair value of liabilities, Ending balance	($197)	($128)	($197)																			($128)

Fair_Value_Schedule_Of_Realize

Fair Value (Schedule Of Realized Gains (Losses) Using Level 3 Inputs) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Dividends and Other Investment Income (Loss) [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Realized gains (losses) from Level 3 inputs	$0	$0	($45)	$0
Fixed Income Securities Gains (Losses), Net [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Realized gains (losses) from Level 3 inputs	1,506	3,024	3,622	9,161
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	0	0	0	10,359
US States and Political Subdivisions Debt Securities [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Fair Value Assets Measured On Recurring Basis And Gain Loss Included In Fixed Income Securities Gains (Losses), Net	2	9	38	9
Fair Value, Assets Measured On Recurring Basis, And Gain (Loss) Included In Accretion Of Purchase Discount On Securities Available-For-Sale	10	18	31	82
Trust Preferred Securities Real Estate Investment Trusts [Member]	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'
Fair Value, Assets Measured On Recurring Basis, And Gain (Loss) Included In Accretion Of Purchase Discount On Securities Available-For-Sale	$64	$61	$190	$162

Fair_Value_Schedule_Of_Assets_2

Fair Value (Schedule Of Assets With Fair Value Changes On Nonrecurring Basis) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Principal amount of other real estate owned property sold	'	'	$61,100,000	$126,000,000	'
Gains (losses) from fair value changes	-4,610,000	-7,067,000	-14,337,000	-21,409,000	'
HTM Securities Adjusted For OTTI [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Gains (losses) from fair value changes	0	-657,000	-403,000	-998,000	'
Impaired Loans [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Gains (losses) from fair value changes	-35,000	-818,000	-1,463,000	-3,859,000	'
Private Equity Investments [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	8,313,000	'	8,313,000	'	13,522,000
Gains (losses) from fair value changes	-2,826,000	-93,000	-4,254,000	-1,845,000	'
Other Real Estate Owned [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Gains (losses) from fair value changes	-1,749,000	-5,499,000	-8,217,000	-14,707,000	'
Level 1 [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	0	'	0	'	0
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	'	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	'	0
Level 1 [Member] | Private Equity Investments [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	0	'	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	'	0
Level 2 [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	50,864,000	'	50,864,000	'	62,743,000
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	'	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	4,164,000	'	4,164,000	'	3,789,000
Level 2 [Member] | Private Equity Investments [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	0	'	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	46,700,000	'	46,700,000	'	58,954,000
Level 3 [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	16,796,000	'	16,796,000	'	37,046,000
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	'	8,483,000	'	23,524,000
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	'	0
Level 3 [Member] | Private Equity Investments [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	8,313,000	'	8,313,000	'	13,522,000
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	'	0
Estimated Fair Value [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	67,660,000	'	67,660,000	'	99,789,000
Estimated Fair Value [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	'	8,483,000	'	23,524,000
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	4,164,000	'	4,164,000	'	3,789,000
Estimated Fair Value [Member] | Other Real Estate Owned [Member]	'	'	'	'	'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'	'	'	'	'
Fair value of assets measured on nonrecurring basis	$46,700,000	'	$46,700,000	'	$58,954,000

Fair_Value_Schedule_Of_Carryin

Fair Value (Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Held-to-maturity, fair value	$727,908	$674,741
Time deposits	2,689,688	2,962,931
Other short-term borrowings	0	5,409
Long-term debt (less fair value hedges)	2,304,301	2,337,113
Carrying Value [Member]	'	'
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Held-to-maturity, fair value	777,849	756,909
Loans and leases (including loans held for sale), net of allowance	37,590,017	37,020,811
Time deposits	2,689,688	2,962,931
Foreign deposits	1,607,409	1,804,060
Other short-term borrowings	0	5,409
Long-term debt (less fair value hedges)	2,298,853	2,329,323
Estimated Fair Value [Member]	'	'
Fair Value, Estimate Not Practicable, Financial Statement Captions [Line Items]	'	'
Held-to-maturity, fair value	727,908	674,741
Loans and leases (including loans held for sale), net of allowance	37,402,157	37,024,198
Time deposits	2,703,085	2,988,714
Foreign deposits	1,607,052	1,803,625
Other short-term borrowings	0	5,421
Long-term debt (less fair value hedges)	$2,529,021	$2,636,422

Commitments_Guarantees_And_Con2

Commitments, Guarantees, And Contingent Liabilities (Narrative) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Guarantees, Commitments And Contingencies [Abstract]	'
Letters of credit, accrued liability	$8.20
Reserve for unfunded lending commitments	4.7
Deferred commitment fees	3.5
Guarantee of trust preferred securities issued by affiliated trusts	15
Guarantee Of Trust Preferred Securities Issued By Affiliated Trusts, Canceled	285
Commitments for Private Equity and Other Noninterest-bearing Investments	28.1
Range of possible loss, minimum	0
Range of possible loss, maximum	$60

Commitments_Guarantees_And_Con3

Commitments, Guarantees, And Contingent Liabilities (Schedule Of Guarantees Issued) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Liabilities for Guarantees on Long-Duration Contracts [Line Items]	'	'
Commitments To Extend Credit	$15,561,565	$14,277,347
Commercial Letters Of Credit	62,832	91,978
Total Unfunded Lending Commitments	16,615,998	15,333,781
Financial [Member]	'	'
Liabilities for Guarantees on Long-Duration Contracts [Line Items]	'	'
Standby letters of credit	812,493	774,427
Performance [Member]	'	'
Liabilities for Guarantees on Long-Duration Contracts [Line Items]	'	'
Standby letters of credit	$179,108	$190,029

Retirement_Plans_Schedule_Of_N

Retirement Plans (Schedule Of Net Periodic Benefit Cost (Credit) For Pension And Postretirement Plans) (Details) (USD $)	3 Months Ended		9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Pension Benefits [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	$0	($3)	$0	$22
Interest cost	1,721	1,885	5,164	5,669
Expected return on plan assets	-3,027	-2,827	-9,082	-8,481
Amortization of net actuarial (gain) loss	2,033	2,198	6,099	6,889
Net periodic benefit cost (credit)	727	1,253	2,181	4,099
Supplemental Retirement Benefits [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	0	0	0	0
Interest cost	101	115	303	345
Amortization of prior service cost (credit)	31	31	93	93
Amortization of net actuarial (gain) loss	17	-28	52	-85
Net periodic benefit cost (credit)	149	118	448	353
Postretirement Benefits [Member]	'	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'
Service cost	8	9	24	27
Interest cost	10	12	31	35
Amortization of prior service cost (credit)	-37	-61	-113	-183
Amortization of net actuarial (gain) loss	-19	-22	-56	-65
Net periodic benefit cost (credit)	($38)	($62)	($114)	($186)

Operating_Segment_Information_1

Operating Segment Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
	Banks		Banks
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	$415,521,000	$438,161,000	$1,264,293,000	$1,301,983,000
Provision for loan losses	-5,573,000	-1,889,000	-56,598,000	24,628,000
Net interest income after provision for loan losses	421,094,000	440,050,000	1,320,891,000	1,277,355,000
Net impairment losses on investment securities	10,470,000	3,876,000	46,873,000	46,175,000
Other noninterest income	5,243,000	3,495,000	15,942,000	9,820,000
Noninterest expense	370,663,000	394,975,000	1,219,689,000	1,189,003,000
Income before income taxes	172,621,000	170,301,000	469,759,000	454,063,000
Income Tax Expense (Benefit)	61,107,000	60,704,000	164,832,000	163,599,000
Net income	111,514,000	109,597,000	304,927,000	290,464,000
Number of community/regional banks operating in distinct geographical areas	8	'	8	'
Zions Bank [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	145,100,000	165,000,000	447,400,000	498,700,000
Provision for loan losses	-9,500,000	17,100,000	-18,400,000	78,000,000
Net interest income after provision for loan losses	154,600,000	147,900,000	465,800,000	420,700,000
Net impairment losses on investment securities	0	-100,000	0	-300,000
Loss on sale of investment securities to Parent	0	0	0	0
Other noninterest income	47,700,000	52,100,000	152,200,000	163,500,000
Noninterest expense	119,100,000	123,500,000	362,100,000	371,000,000
Income before income taxes	83,200,000	76,400,000	255,900,000	212,900,000
Income Tax Expense (Benefit)	30,200,000	27,400,000	93,300,000	75,500,000
Net income	53,000,000	49,000,000	162,600,000	137,400,000
Total assets	18,237,000,000	17,641,000,000	17,609,000,000	17,410,000,000
Average cash and due from banks	339,000,000	359,000,000	347,000,000	367,000,000
Average money market investments	3,868,000,000	2,725,000,000	3,113,000,000	2,507,000,000
Average Securities	1,287,000,000	1,331,000,000	1,279,000,000	1,380,000,000
Total loans	12,271,000,000	12,566,000,000	12,330,000,000	12,501,000,000
Total deposits	15,951,000,000	15,140,000,000	15,314,000,000	14,887,000,000
Preferred equity	280,000,000	444,000,000	280,000,000	468,000,000
Common equity	1,530,000,000	1,441,000,000	1,524,000,000	1,419,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	1,810,000,000	1,885,000,000	1,804,000,000	1,887,000,000
CB&T [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	109,800,000	118,000,000	347,000,000	352,400,000
Provision for loan losses	-3,000,000	-2,800,000	-12,800,000	-9,500,000
Net interest income after provision for loan losses	112,800,000	120,800,000	359,800,000	361,900,000
Net impairment losses on investment securities	0	0	0	0
Loss on sale of investment securities to Parent	0	0	0	-9,200,000
Other noninterest income	20,800,000	19,300,000	62,100,000	57,500,000
Noninterest expense	75,900,000	85,200,000	260,700,000	250,800,000
Income before income taxes	57,700,000	54,900,000	161,200,000	159,400,000
Income Tax Expense (Benefit)	23,000,000	21,800,000	63,700,000	63,100,000
Net income	34,700,000	33,100,000	97,500,000	96,300,000
Total assets	10,869,000,000	11,000,000,000	10,871,000,000	10,905,000,000
Average cash and due from banks	164,000,000	168,000,000	168,000,000	176,000,000
Average money market investments	1,288,000,000	1,296,000,000	1,284,000,000	1,175,000,000
Average Securities	321,000,000	362,000,000	333,000,000	350,000,000
Total loans	8,328,000,000	8,332,000,000	8,297,000,000	8,342,000,000
Total deposits	9,261,000,000	9,404,000,000	9,267,000,000	9,246,000,000
Preferred equity	162,000,000	184,000,000	162,000,000	231,000,000
Common equity	1,326,000,000	1,307,000,000	1,324,000,000	1,293,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	1,488,000,000	1,491,000,000	1,486,000,000	1,524,000,000
Number of branches	97	'	97	'
Amegy [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	95,500,000	91,600,000	284,900,000	278,500,000
Provision for loan losses	12,800,000	-18,300,000	4,700,000	-50,500,000
Net interest income after provision for loan losses	82,700,000	109,900,000	280,200,000	329,000,000
Net impairment losses on investment securities	0	0	0	0
Loss on sale of investment securities to Parent	0	0	0	0
Other noninterest income	37,100,000	38,300,000	111,000,000	115,000,000
Noninterest expense	75,300,000	86,300,000	251,400,000	255,100,000
Income before income taxes	44,500,000	61,900,000	139,800,000	188,900,000
Income Tax Expense (Benefit)	14,900,000	20,800,000	46,800,000	62,900,000
Net income	29,600,000	41,100,000	93,000,000	126,000,000
Total assets	13,453,000,000	12,231,000,000	13,122,000,000	12,116,000,000
Average cash and due from banks	255,000,000	259,000,000	283,000,000	293,000,000
Average money market investments	2,823,000,000	2,446,000,000	2,563,000,000	2,357,000,000
Average Securities	285,000,000	313,000,000	336,000,000	331,000,000
Total loans	8,981,000,000	8,073,000,000	8,790,000,000	8,012,000,000
Total deposits	11,024,000,000	9,805,000,000	10,707,000,000	9,625,000,000
Preferred equity	248,000,000	330,000,000	250,000,000	409,000,000
Common equity	1,805,000,000	1,689,000,000	1,775,000,000	1,665,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	2,053,000,000	2,019,000,000	2,025,000,000	2,074,000,000
Number of branches	84	'	84	'
NBA [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	40,500,000	41,900,000	122,400,000	125,300,000
Provision for loan losses	-7,300,000	1,700,000	-12,000,000	10,700,000
Net interest income after provision for loan losses	47,800,000	40,200,000	134,400,000	114,600,000
Net impairment losses on investment securities	0	0	0	0
Loss on sale of investment securities to Parent	0	0	0	0
Other noninterest income	8,600,000	7,600,000	25,600,000	23,200,000
Noninterest expense	35,300,000	37,300,000	104,900,000	113,200,000
Income before income taxes	21,100,000	10,500,000	55,100,000	24,600,000
Income Tax Expense (Benefit)	7,700,000	3,400,000	20,500,000	8,900,000
Net income	13,400,000	7,100,000	34,600,000	15,700,000
Total assets	4,624,000,000	4,447,000,000	4,612,000,000	4,457,000,000
Average cash and due from banks	70,000,000	70,000,000	70,000,000	70,000,000
Average money market investments	444,000,000	482,000,000	452,000,000	569,000,000
Average Securities	320,000,000	274,000,000	298,000,000	276,000,000
Total loans	3,600,000,000	3,402,000,000	3,588,000,000	3,321,000,000
Total deposits	3,945,000,000	3,766,000,000	3,919,000,000	3,732,000,000
Preferred equity	153,000,000	198,000,000	171,000,000	259,000,000
Common equity	410,000,000	379,000,000	406,000,000	363,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	563,000,000	577,000,000	577,000,000	622,000,000
Number of branches	72	'	72	'
NSB [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	28,400,000	30,400,000	84,400,000	92,600,000
Provision for loan losses	0	-1,200,000	-8,900,000	-9,500,000
Net interest income after provision for loan losses	28,400,000	31,600,000	93,300,000	102,100,000
Net impairment losses on investment securities	0	0	0	0
Loss on sale of investment securities to Parent	0	0	0	0
Other noninterest income	11,400,000	8,800,000	30,000,000	25,300,000
Noninterest expense	32,000,000	31,300,000	97,900,000	101,000,000
Income before income taxes	7,800,000	9,100,000	25,400,000	26,400,000
Income Tax Expense (Benefit)	2,600,000	3,100,000	8,600,000	9,100,000
Net income	5,200,000	6,000,000	16,800,000	17,300,000
Total assets	4,022,000,000	4,085,000,000	4,046,000,000	4,127,000,000
Average cash and due from banks	87,000,000	83,000,000	85,000,000	87,000,000
Average money market investments	883,000,000	936,000,000	944,000,000	960,000,000
Average Securities	785,000,000	774,000,000	769,000,000	770,000,000
Total loans	2,158,000,000	2,156,000,000	2,127,000,000	2,176,000,000
Total deposits	3,600,000,000	3,597,000,000	3,606,000,000	3,597,000,000
Preferred equity	90,000,000	180,000,000	114,000,000	227,000,000
Common equity	310,000,000	286,000,000	304,000,000	280,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	400,000,000	466,000,000	418,000,000	507,000,000
Number of branches	51	'	51	'
Vectra [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	25,800,000	27,300,000	76,500,000	81,500,000
Provision for loan losses	1,800,000	2,200,000	-7,600,000	4,600,000
Net interest income after provision for loan losses	24,000,000	25,100,000	84,100,000	76,900,000
Net impairment losses on investment securities	0	0	0	0
Loss on sale of investment securities to Parent	0	0	0	0
Other noninterest income	6,500,000	7,600,000	19,600,000	18,700,000
Noninterest expense	24,400,000	23,400,000	75,000,000	73,000,000
Income before income taxes	6,100,000	9,300,000	28,700,000	22,600,000
Income Tax Expense (Benefit)	2,100,000	3,200,000	10,000,000	7,500,000
Net income	4,000,000	6,100,000	18,700,000	15,100,000
Total assets	2,630,000,000	2,441,000,000	2,541,000,000	2,395,000,000
Average cash and due from banks	48,000,000	54,000,000	50,000,000	52,000,000
Average money market investments	127,000,000	47,000,000	84,000,000	49,000,000
Average Securities	184,000,000	207,000,000	184,000,000	217,000,000
Total loans	2,195,000,000	2,046,000,000	2,142,000,000	1,991,000,000
Total deposits	2,258,000,000	2,085,000,000	2,177,000,000	2,047,000,000
Preferred equity	70,000,000	70,000,000	70,000,000	70,000,000
Common equity	241,000,000	214,000,000	235,000,000	208,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	311,000,000	284,000,000	305,000,000	278,000,000
TCBW [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	7,000,000	6,900,000	20,300,000	20,900,000
Provision for loan losses	-300,000	-600,000	-1,100,000	800,000
Net interest income after provision for loan losses	7,300,000	7,500,000	21,400,000	20,100,000
Net impairment losses on investment securities	0	0	0	0
Loss on sale of investment securities to Parent	-2,700,000	0	-2,700,000	0
Other noninterest income	1,000,000	1,000,000	3,000,000	2,800,000
Noninterest expense	4,800,000	4,900,000	13,600,000	13,900,000
Income before income taxes	800,000	3,600,000	8,100,000	9,000,000
Income Tax Expense (Benefit)	300,000	1,200,000	2,800,000	3,000,000
Net income	500,000	2,400,000	5,300,000	6,000,000
Total assets	882,000,000	863,000,000	866,000,000	877,000,000
Average cash and due from banks	19,000,000	20,000,000	19,000,000	20,000,000
Average money market investments	121,000,000	158,000,000	135,000,000	168,000,000
Average Securities	101,000,000	115,000,000	103,000,000	119,000,000
Total loans	627,000,000	556,000,000	596,000,000	556,000,000
Total deposits	743,000,000	722,000,000	727,000,000	730,000,000
Preferred equity	3,000,000	2,000,000	3,000,000	10,000,000
Common equity	86,000,000	80,000,000	84,000,000	78,000,000
Noncontrolling interests	0	0	0	0
Total shareholders' equity	89,000,000	82,000,000	87,000,000	88,000,000
Number of branches	1	'	1	'
Other Banks [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	-36,600,000	-42,900,000	-118,600,000	-147,900,000
Provision for loan losses	-100,000	0	-500,000	0
Net interest income after provision for loan losses	-36,500,000	-42,900,000	-118,100,000	-147,900,000
Net impairment losses on investment securities	-9,100,000	-2,700,000	-23,400,000	-20,000,000
Loss on sale of investment securities to Parent	2,700,000	0	2,700,000	9,200,000
Other noninterest income	-1,800,000	-6,700,000	-11,600,000	-20,000,000
Noninterest expense	3,900,000	3,100,000	54,100,000	11,000,000
Income before income taxes	-48,600,000	-55,400,000	-204,500,000	-189,700,000
Income Tax Expense (Benefit)	-19,700,000	-20,200,000	-80,900,000	-66,400,000
Net income	-28,900,000	-35,200,000	-123,600,000	-123,300,000
Total assets	798,000,000	659,000,000	1,019,000,000	660,000,000
Average cash and due from banks	-6,000,000	-13,000,000	-9,000,000	-16,000,000
Average money market investments	-100,000,000	-100,000,000	169,000,000	-98,000,000
Average Securities	592,000,000	449,000,000	551,000,000	444,000,000
Total loans	64,000,000	68,000,000	63,000,000	68,000,000
Total deposits	-1,194,000,000	-1,041,000,000	-718,000,000	-932,000,000
Preferred equity	680,000,000	357,000,000	429,000,000	309,000,000
Common equity	-518,000,000	-637,000,000	-557,000,000	-600,000,000
Noncontrolling interests	0	-3,000,000	-2,000,000	-3,000,000
Total shareholders' equity	162,000,000	-283,000,000	-130,000,000	-294,000,000
Consolidated Company [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Net interest income	415,500,000	438,200,000	1,264,300,000	1,302,000,000
Provision for loan losses	-5,600,000	-1,900,000	-56,600,000	24,600,000
Net interest income after provision for loan losses	421,100,000	440,100,000	1,320,900,000	1,277,400,000
Net impairment losses on investment securities	-9,100,000	-2,800,000	-23,400,000	-20,300,000
Loss on sale of investment securities to Parent	0	0	0	0
Other noninterest income	131,300,000	128,000,000	391,900,000	386,000,000
Noninterest expense	370,700,000	395,000,000	1,219,700,000	1,189,000,000
Income before income taxes	172,600,000	170,300,000	469,700,000	454,100,000
Income Tax Expense (Benefit)	61,100,000	60,700,000	164,800,000	163,600,000
Net income	111,500,000	109,600,000	304,900,000	290,500,000
Total assets	55,515,000,000	53,367,000,000	54,686,000,000	52,947,000,000
Average cash and due from banks	976,000,000	1,000,000,000	1,013,000,000	1,049,000,000
Average money market investments	9,454,000,000	7,990,000,000	8,744,000,000	7,687,000,000
Average Securities	3,875,000,000	3,825,000,000	3,853,000,000	3,887,000,000
Total loans	38,224,000,000	37,199,000,000	37,933,000,000	36,967,000,000
Total deposits	45,588,000,000	43,478,000,000	44,999,000,000	42,932,000,000
Preferred equity	1,686,000,000	1,765,000,000	1,479,000,000	1,983,000,000
Common equity	5,190,000,000	4,759,000,000	5,095,000,000	4,706,000,000
Noncontrolling interests	0	-3,000,000	-2,000,000	-3,000,000
Total shareholders' equity	$6,876,000,000	$6,521,000,000	$6,572,000,000	$6,686,000,000
TCBO [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Number of branches	1	'	1	'
Utah [Member] | Zions Bank [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Number of branches	100	'	100	'
Idaho [Member] | Zions Bank [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Number of branches	26	'	26	'
Colorado [Member] | Vectra [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Number of branches	38	'	38	'
New Mexico [Member] | Vectra [Member]	'	'	'	'
Segment Reporting Information [Line Items]	'	'	'	'
Number of branches	1	'	1	'