Fair Value (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Disclosures [Abstract]

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

(In thousands)	December 31, 2016
	Level 1		Level 2		Level 3		Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	—	$	12,009,676	$	—	$	12,009,676
Municipal securities			1,154,210				1,154,210
Other debt securities			23,892				23,892
Money market mutual funds and other	183,699		717				184,416
	183,699		13,188,495		—		13,372,194
Trading account			114,803				114,803
Other noninterest-bearing investments:
Bank-owned life insurance			497,466				497,466
Private equity investments					128,654		128,654
Other assets:
Agriculture loan servicing and interest-only strips					20,248		20,248
Deferred compensation plan assets	91,040						91,040
Derivatives:
Interest rate related and other			4,165				4,165
Interest rate swaps for customers			48,754				48,754
Foreign currency exchange contracts	11,276						11,276
	11,276		52,919		—		64,195
	$	286,015	$	13,853,683	$	148,902	$	14,288,600
LIABILITIES
Securities sold, not yet purchased	$	25,321	$	—	$	—	$	25,321
Other liabilities:
Deferred compensation plan obligations	91,040						91,040
Derivatives:
Interest rate related and other			1,499				1,499
Interest rate swaps for customers			49,050				49,050
Foreign currency exchange contracts	8,672						8,672
	8,672		50,549		—		59,221
	$	125,033	$	50,549	$	—	$	175,582

(In thousands)	December 31, 2015
	Level 1		Level 2		Level 3		Total
ASSETS
Investment securities:
Available-for-sale:
U.S. Treasury, agencies and corporations	$	—	$	7,100,844	$	—	$	7,100,844
Municipal securities			418,695				418,695
Other debt securities			22,941				22,941
Money market mutual funds and other	61,807		38,829				100,636
	61,807		7,581,309		—		7,643,116
Trading account			48,168				48,168
Other noninterest-bearing investments:
Bank-owned life insurance			485,978				485,978
Private equity investments					120,027		120,027
Other assets:
Agriculture loan servicing and interest-only strips					13,514		13,514
Deferred compensation plan assets	84,570						84,570
Derivatives:
Interest rate related and other			5,966				5,966
Interest rate swaps for customers			51,353				51,353
Foreign currency exchange contracts	20,824						20,824
	20,824		57,319		—		78,143
	$	167,201	$	8,172,774	$	133,541	$	8,473,516
LIABILITIES
Securities sold, not yet purchased	$	30,158	$	—	$	—	$	30,158
Other liabilities:
Deferred compensation plan obligations	84,570						84,570
Derivatives:
Interest rate related and other			835				835
Interest rate swaps for customers			53,843				53,843
Foreign currency exchange contracts	17,761						17,761
	17,761		54,678		—		72,439
	$	132,489	$	54,678	$	—	$	187,167

Schedule Of Assets And Liabilities Measured At Fair Value By Class On A Recurring Basis Using Level 3 Inputs

	Level 3 Instruments
	Year Ended December 31, 2016
(In thousands)	Municipal securities		Trust  preferred – banks and insurance		Other		Private equity investments			Ag loan svcg and int-only strips			Derivatives and other liabilities
Balance at December 31, 2015	$	—	$	—	$	—	$	120,027		$	13,514		$	—
Total net gains (losses) included in:
Statement of income:
Dividends and other investment loss							(1,340		)
Equity securities gains, net							5,325
Other noninterest income										7,549
Purchases							19,174			368
Sales							(3,673		)
Redemptions and paydowns							(10,859		)	(1,183		)
Balance at December 31, 2016	$	—	$	—	$	—	$	128,654		$	20,248		$	—

	Level 3 Instruments
	Year Ended December 31, 2015
(In thousands)	Municipal securities			Trust  preferred – banks and insurance			Other			Private equity investments			Ag loan svcg and int-only strips			Derivatives and other liabilities
Balance at December 31, 2014	$	4,164		$	393,007		$	4,761		$	97,649		$	12,227		$	(12	)
Total net gains (losses) included in:
Statement of income:
Accretion of purchase discount on securities available-for-sale	3			471
Dividends and other investment loss										(3,657		)
Equity securities gains, net										7,270
Fixed income securities losses, net	(344		)	(136,691		)	(606		)
Other noninterest income													1,480
Other noninterest expense																12
Other comprehensive income (loss)	687			141,547			(74		)
Fair Value of HTM securities reclassified as AFS				57,308
Purchases										24,898			993
Sales	(2,651		)	(440,055		)	(4,081		)	(4,107		)
Redemptions and paydowns	(1,859		)	(15,587		)				(2,026		)	(1,186		)
Balance at December 31, 2015	$	—		$	—		$	—		$	120,027		$	13,514		$	—

¹  Real Estate Investment Trust

Schedule Of Realized Gains (Losses) Using Level 3 Inputs

(In thousands)	Year Ended December 31,
	2016		2015
Dividends and other investment loss	$	—	$	(2	)
Equity securities gains (losses), net	5,727		(11,311		)
Fixed income securities losses, net	—		(137,641		)

Schedule Of Assets With Fair Value Changes On Nonrecurring Basis

(In thousands)	Fair value at December 31, 2016								Gains (losses) from fair value changes Year Ended December 31, 2016
	Level 1		Level 2		Level 3		Total
ASSETS
Private equity investments, carried at cost	$	—	$	—	$	1,297	$	1,297	$	(522	)
Impaired loans	—		51,842		—		51,842		(36,276		)
Other real estate owned	—		871		—		871		(1,871		)
	$	—	$	52,713	$	1,297	$	54,010	$	(38,669	)

(In thousands)	Fair value at December 31, 2015								Gains (losses) from fair value changes Year Ended December 31, 2016
	Level 1		Level 2		Level 3		Total
ASSETS
Private equity investments, carried at cost	$	—	$	—	$	10,707	$	10,707	$	(5,119	)
Impaired loans	—		10,991		—		10,991		(12,039		)
Other real estate owned	—		2,388		—		2,388		(2,467		)
	$	—	$	13,379	$	10,707	$	24,086	$	(19,625	)

Schedule Of Carrying Values And Estimated Fair Values Of Financial Instruments

	December 31, 2016
(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	$	568,334	$	—	$	568,334	$	—		$	—		$	568,334
Derivatives (included in other assets)	64,195		—		64,195		(17,118		)	(162		)	46,915
	$	632,529	$	—	$	632,529	$	(17,118	)	$	(162	)	$	615,249
Liabilities:
Federal funds and other short-term borrowings	$	827,269	$	—	$	827,269	$	—		$	—		$	827,269
Derivatives (included in other liabilities)	59,221		—		59,221		(17,118		)	(16,570		)	25,533
	$	886,490	$	—	$	886,490	$	(17,118	)	$	(16,570	)	$	852,802

	December 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	$	619,758	$	—	$	619,758	$	—		$	—		$	619,758
Derivatives (included in other assets)	77,638		—		77,638		(6,990		)				70,648
	$	697,396	$	—	$	697,396	$	(6,990	)	$	—		$	690,406
Liabilities:
Federal funds and other short-term borrowings	$	346,987	$	—	$	346,987	$	—		$	—		$	346,987
Derivatives (included in other liabilities)	72,568		—		72,568		(6,990		)	(60,923		)	4,655
	$	419,555	$	—	$	419,555	$	(6,990	)	$	(60,923	)	$	351,642

	December 31, 2016					December 31, 2015
(In thousands)	Carrying value		Estimated fair value		Level	Carrying value		Estimated fair value		Level
Financial assets:
HTM investment securities	$	867,904	$	850,473	2	$	545,648	$	552,088	2
Loans and leases (including loans held for sale), net of allowance	42,253,677		42,110,544		3	40,193,374		39,535,365		3
Financial liabilities:
Time deposits	2,756,810		2,743,885		2	2,130,680		2,129,742		2
Foreign deposits	—		—		2	294,391		294,321		2
Other short-term borrowings	500,000		500,000		2	—		—		2
Long-term debt (less fair value hedges)	534,850		551,881		2	812,366		838,796		2