Fair Value Of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value Of Financial Instruments [Abstract]

Fair value of financial instruments [Table Text Block]

	Fair Value Hierarchy Level	September 30, 2015				December 31, 2014
(In thousands)		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial Assets
Loans:
Business	Level 3	$	4,406,854	$	4,438,854	$	3,969,952	$	3,982,531
Real estate - construction and land	Level 3	534,425		541,912		403,507		407,905
Real estate - business	Level 3	2,286,013		2,327,496		2,288,215		2,315,378
Real estate - personal	Level 3	1,920,650		1,968,453		1,883,092		1,933,456
Consumer	Level 3	1,886,806		1,885,963		1,705,134		1,701,037
Revolving home equity	Level 3	428,940		431,324		430,873		433,508
Consumer credit card	Level 3	756,093		769,878		782,370		794,929
Overdrafts	Level 3	4,493		4,493		6,095		6,095
Loans held for sale	Level 2	4,143		4,143		—		—
Investment securities:
Available for sale	Level 1	439,908		439,908		519,382		519,382
Available for sale	Level 2	8,939,862		8,939,862		8,909,035		8,909,035
Available for sale	Level 3	93,189		93,189		95,143		95,143
Trading	Level 2	14,463		14,463		15,357		15,357
Non-marketable	Level 3	116,634		116,634		106,875		106,875
Federal funds sold	Level 1	32,550		32,550		32,485		32,485
Securities purchased under agreements to resell	Level 3	975,000		978,480		1,050,000		1,048,866
Interest earning deposits with banks	Level 1	42,078		42,078		600,744		600,744
Cash and due from banks	Level 1	384,122		384,122		467,488		467,488
Derivative instruments	Level 2	15,916		15,916		10,454		10,454
Derivative instruments	Level 3	453		453		3		3
Financial Liabilities
Non-interest bearing deposits	Level 1	$	6,699,873	$	6,699,873	$	6,811,959	$	6,811,959
Savings, interest checking and money market deposits	Level 1	10,295,260		10,295,260		10,541,601		10,541,601
Time open and certificates of deposit	Level 3	1,991,627		1,991,741		2,122,218		2,121,114
Federal funds purchased	Level 1	561,700		561,700		3,840		3,840
Securities sold under agreements to repurchase	Level 3	1,631,497		1,631,562		1,858,678		1,858,731
Other borrowings	Level 3	103,831		109,939		104,058		111,102
Derivative instruments	Level 2	16,017		16,017		10,722		10,722
Derivative instruments	Level 3	234		234		226		226