Fair Value (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Disclosures [Abstract]

Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis

(In thousands)	March 31, 2015
	Level 1		Level 2		Level 3		Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	—	$	3,655,221	$	—	$	3,655,221
Municipal securities			173,145		2,465		175,610
Asset-backed securities:
Trust preferred – banks and insurance			23,179		438,338		461,517
Other			638		4,826		5,464
Mutual funds and other	124,443		28,247				152,690
	124,443		3,880,430		445,629		4,450,502
Trading account			71,392				71,392
Other noninterest-bearing investments:
Bank-owned life insurance			478,926				478,926
Private equity					107,448		107,448
Other assets:
Agriculture loan servicing and interest-only strips					12,001		12,001
Deferred compensation plan assets	91,368						91,368
Derivatives:
Interest rate related and other			5,408				5,408
Interest rate swaps for customers			58,982				58,982
Foreign currency exchange contracts	20,373						20,373
	20,373		64,390		—		84,763
	$	236,184	$	4,495,138	$	565,078	$	5,296,400
LIABILITIES
Securities sold, not yet purchased	$	6,749	$	—	$	—	$	6,749
Other liabilities:
Deferred compensation plan obligations	91,368						91,368
Derivatives:
Interest rate related and other			176				176
Interest rate swaps for customers			62,452				62,452
Foreign currency exchange contracts	18,671						18,671
	18,671		62,628		—		81,299
	$	116,788	$	62,628	$	—	$	179,416

(In thousands)	December 31, 2014
	Level 1		Level 2		Level 3		Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	—	$	3,098,208	$	—	$	3,098,208
Municipal securities			185,093		4,164		189,257
Asset-backed securities:
Trust preferred – banks and insurance			22,701		393,007		415,708
Auction rate					4,761		4,761
Other			666		25		691
Mutual funds and other	105,348		30,275				135,623
	105,348		3,336,943		401,957		3,844,248
Trading account			70,601				70,601
Other noninterest-bearing investments:
Bank-owned life insurance			476,290				476,290
Private equity					99,865		99,865
Other assets:
Agriculture loan servicing and interest-only strips					12,227		12,227
Deferred compensation plan assets	88,878						88,878
Derivatives:
Interest rate related and other			1,508				1,508
Interest rate swaps for customers			48,287				48,287
Foreign currency exchange contracts	16,625						16,625
	16,625		49,795		—		66,420
	$	210,851	$	3,933,629	$	514,049	$	4,658,529
LIABILITIES
Securities sold, not yet purchased	$	24,230	$	—	$	—	$	24,230
Other liabilities:
Deferred compensation plan obligations	88,878						88,878
Derivatives:
Interest rate related and other			297				297
Interest rate swaps for customers			50,669				50,669
Foreign currency exchange contracts	15,272						15,272
	15,272		50,966		—		66,238
Other					13		13
	$	128,380	$	50,966	$	13	$	179,359

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 March 31, 2015
(In thousands)	Municipal securities			Trust  preferred – banks and insurance			Trust preferred  – REIT		Other			Private equity investments			Ag loan svcg and int-only strips			Derivatives and other liabilities
Balance at December 31, 2014	$	4,164		$	393,007		$	—	$	4,786		$	99,865		$	12,227		$	(13	)
Net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	2			257
Dividends and other investment income												1,074
Equity securities losses, net												3,253
Fixed income securities gains (losses), net	31			(323		)
Other noninterest income															4
Other noninterest expense																		13
Other comprehensive income (loss)	127			(6,949		)			42
Fair value of HTM securities reclassified as AFS				57,308
Purchases												5,052			171
Sales				(2,613		)						(1,517		)
Redemptions and paydowns	(1,859		)	(2,349		)			(2		)	(279		)	(401		)
Balance at March 31, 2015	$	2,465		$	438,338		$	—	$	4,826		$	107,448		$	12,001		$	—

	Level 3 Instruments
	Three Months Ended March 31, 2014
(In thousands)	Municipal securities			Trust  preferred – banks and insurance			Trust preferred – REIT			Auction rate			Other asset-backed			Private equity investments			Ag loan svcg and int-only strips			Derivatives and other liabilities
Balance at December 31, 2013	$	10,662		$	1,238,820		$	22,996		$	6,599		$	25,800		$	82,410		$	8,852		$	(4,303	)
Net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	10			720						1
Dividends and other investment income																(1,695		)
Fair value and nonhedge derivative loss																						(7,427		)
Fixed income securities gains, net	16			18,582			1,399						10,917
Other noninterest income																			481
Other noninterest expense																						8
Other comprehensive income (loss)	(274		)	94,462						(40		)	(15		)
Purchases																1,356			2,077
Sales				(546,388		)	(24,395		)				(36,669		)	(824		)
Redemptions and paydowns	(230		)	(46,786		)							(3		)	(195		)	(203		)	6,090
Transfers to Level 2				(69,193		)
Balance at March 31, 2014	$	10,184		$	690,217		$	—		$	6,560		$	30		$	81,052		$	11,207		$	(5,632	)

Schedule Of Realized Gains (Losses) Using Level 3 Inputs

(In thousands)	Three Months Ended March 31,
	2015			2014
Dividends and other investment income	$	—		$	34
Fixed income securities gains (losses), net	(292		)	30,914

Summary of Quantitative Information Relating to the Principal Valuation Techniques and Significant Unobservable Inputs for Level 3 [Table Text Block]

	Level 3 Instruments
	Quantitative information at March 31, 2015
(Dollar amounts in thousands)	Fair value		Principal valuation techniques	Significant unobservable inputs	Range of inputs (% annually)
Asset-backed securities:
Trust preferred – predominantly banks	$	438,338	Discounted cash flow Market comparables	Constant prepayment rate	until maturity – 2.0%
				Constant default rate	yr 1 – 0.3% to 0.5%
					yrs 2-5 – 0.5% to 0.7%
					yrs 6 to maturity – 0.6% to 0.7%
				Loss given default	100%
				Loss given deferral	11.9% to 100%
				Discount rate (spread over forward LIBOR)	3.7% to 5.4%

	Level 3 Instruments
	Quantitative information at December 31, 2014
(Dollar amounts in thousands)	Fair value		Principal valuation techniques	Significant unobservable inputs	Range of inputs (% annually)
Asset-backed securities:
Trust preferred – predominantly banks	$	393,007	Discounted cash flow Market comparables	Constant prepayment rate	until maturity – 2.0%
				Constant default rate	yr 1 – 0.3% to 0.8%
					yrs 2-5 – 0.5% to 0.9%
					yrs 6 to maturity – 0.6% to 0.7%
				Loss given default	100%
				Loss given deferral	14.5% to 100%
				Discount rate (spread over forward LIBOR)	3.4% to 5.6%

Schedule Of Assets With Fair Value Changes On Nonrecurring Basis

(In thousands)	Fair value at March 31, 2015								Fair value at December 31, 2014
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
ASSETS
Private equity investments, carried at cost	$	—	$	—	$	1,997	$	1,997	$	—	$	—	$	23,454	$	23,454
Impaired loans	—		9,793		—		9,793		—		20,494		—		20,494
Other real estate owned	—		2,886		—		2,886		—		8,034		—		8,034
	$	—	$	12,679	$	1,997	$	14,676	$	—	$	28,528	$	23,454	$	51,982

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. Accordingly, carrying values may not equal current fair value.

	Gains (losses) from fair value changes
(In thousands)	Three Months Ended March 31,
	2015			2014
ASSETS
HTM securities adjusted for OTTI	$	—		$	(27	)
Private equity investments, carried at cost	(1,153		)	—
Impaired loans	(4,487		)	(2,177		)
Other real estate owned	(1,008		)	(2,234		)
	$	(6,648	)	$	(4,438	)

Fair Value, by Balance Sheet Grouping [Table Text Block]

	March 31, 2015
(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	$	1,519,352	$	—	$	1,519,352	$	—		$	—		$	1,519,352
Derivatives (included in other assets)	83,978		—		83,978		(5,121		)	—			78,857
	$	1,603,330	$	—	$	1,603,330	$	(5,121	)	$	—		$	1,598,209
Liabilities:
Federal funds and other short-term borrowings	$	203,597	$	—	$	203,597	$	—		$	—		$	203,597
Derivatives (included in other liabilities)	81,123		—		81,123		(5,121		)	(38,833		)	37,169
	$	284,720	$	—	$	284,720	$	(5,121	)	$	(38,833	)	$	240,766

	December 31, 2014
(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	$	1,386,291	$	—	$	1,386,291	$	—		$	—		$	1,386,291
Derivatives (included in other assets)	66,420		—		66,420		(3,755		)				62,665
	$	1,452,711	$	—	$	1,452,711	$	(3,755	)	$	—		$	1,448,956
Liabilities:
Federal funds and other short-term borrowings	$	244,223	$	—	$	244,223	$	—		$	—		$	244,223
Derivatives (included in other liabilities)	66,064		—		66,064		(3,755		)	(31,968		)	30,341
	$	310,287	$	—	$	310,287	$	(3,755	)	$	(31,968	)	$	274,564

	March 31, 2015					December 31, 2014
(In thousands)	Carrying value		Estimated fair value		Level	Carrying value		Estimated fair value		Level
Financial assets:
HTM investment securities	$	590,950	$	602,355	3	$	647,252	$	677,196	3
Loans and leases (including loans held for sale), net of allowance	39,689,047		39,573,365		3	39,591,499		39,426,498		3
Financial liabilities:
Time deposits	2,344,818		2,349,454		2	2,406,924		2,408,550		2
Foreign deposits	382,985		382,873		2	328,391		328,447		2
Long-term debt (less fair value hedges)	1,088,285		1,149,869		2	1,090,778		1,159,287		2