Fair Value Of Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Of Financial Instruments [Abstract]

Fair value of financial instruments [Table Text Block]

	Fair Value Hierarchy Level	March 31, 2015				December 31, 2014
(In thousands)		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial Assets
Loans:
Business	Level 3	$	4,183,977	$	4,208,415	$	3,969,952	$	3,982,531
Real estate - construction and land	Level 3	423,928		429,387		403,507		407,905
Real estate - business	Level 3	2,282,988		2,321,827		2,288,215		2,315,378
Real estate - personal	Level 3	1,887,557		1,933,813		1,883,092		1,933,456
Consumer	Level 3	1,766,888		1,768,054		1,705,134		1,701,037
Revolving home equity	Level 3	426,964		429,934		430,873		433,508
Consumer credit card	Level 3	739,543		752,522		782,370		794,929
Overdrafts	Level 3	10,115		10,115		6,095		6,095
Loans held for sale	Level 2	2,770		2,770		—		—
Investment securities:
Available for sale	Level 1	455,996		455,996		519,382		519,382
Available for sale	Level 2	9,367,975		9,367,975		8,909,035		8,909,035
Available for sale	Level 3	93,271		93,271		95,143		95,143
Trading	Level 2	15,501		15,501		15,357		15,357
Non-marketable	Level 3	110,560		110,560		106,875		106,875
Federal funds sold	Level 1	12,450		12,450		32,485		32,485
Securities purchased under agreements to resell	Level 3	1,050,000		1,050,599		1,050,000		1,048,866
Interest earning deposits with banks	Level 1	123,712		123,712		600,744		600,744
Cash and due from banks	Level 1	416,109		416,109		467,488		467,488
Derivative instruments	Level 2	12,819		12,819		10,454		10,454
Derivative instruments	Level 3	411		411		3		3
Financial Liabilities
Non-interest bearing deposits	Level 1	$	6,785,221	$	6,785,221	$	6,811,959	$	6,811,959
Savings, interest checking and money market deposits	Level 1	10,656,139		10,656,139		10,541,601		10,541,601
Time open and certificates of deposit	Level 3	2,135,139		2,135,054		2,122,218		2,121,114
Federal funds purchased	Level 1	13,588		13,588		3,840		3,840
Securities sold under agreements to repurchase	Level 3	1,596,875		1,596,925		1,858,678		1,858,731
Other borrowings	Level 3	103,854		110,894		104,058		111,102
Derivative instruments	Level 2	13,529		13,529		10,722		10,722
Derivative instruments	Level 3	253		253		226		226