Fair Value Of Financial Instruments (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Of Financial Instruments [Abstract]

Fair value of financial instruments [Table Text Block]

	Fair Value Hierarchy Level	June 30, 2015				December 31, 2014
(In thousands)		Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
Financial Assets
Loans:
Business	Level 3	$	4,267,997	$	4,282,667	$	3,969,952	$	3,982,531
Real estate - construction and land	Level 3	448,887		454,531		403,507		407,905
Real estate - business	Level 3	2,276,231		2,308,581		2,288,215		2,315,378
Real estate - personal	Level 3	1,901,671		1,932,967		1,883,092		1,933,456
Consumer	Level 3	1,848,457		1,843,240		1,705,134		1,701,037
Revolving home equity	Level 3	430,880		433,447		430,873		433,508
Consumer credit card	Level 3	750,731		763,226		782,370		794,929
Overdrafts	Level 3	3,627		3,627		6,095		6,095
Loans held for sale	Level 2	7,852		7,852		—		—
Investment securities:
Available for sale	Level 1	455,138		455,138		519,382		519,382
Available for sale	Level 2	8,673,743		8,673,743		8,909,035		8,909,035
Available for sale	Level 3	92,940		92,940		95,143		95,143
Trading	Level 2	18,971		18,971		15,357		15,357
Non-marketable	Level 3	108,346		108,346		106,875		106,875
Federal funds sold	Level 1	26,875		26,875		32,485		32,485
Securities purchased under agreements to resell	Level 3	1,050,000		1,050,400		1,050,000		1,048,866
Interest earning deposits with banks	Level 1	264,683		264,683		600,744		600,744
Cash and due from banks	Level 1	409,791		409,791		467,488		467,488
Derivative instruments	Level 2	10,266		10,266		10,454		10,454
Derivative instruments	Level 3	355		355		3		3
Financial Liabilities
Non-interest bearing deposits	Level 1	$	6,886,509	$	6,886,509	$	6,811,959	$	6,811,959
Savings, interest checking and money market deposits	Level 1	10,369,031		10,369,031		10,541,601		10,541,601
Time open and certificates of deposit	Level 3	2,033,169		2,031,121		2,122,218		2,121,114
Federal funds purchased	Level 1	350		350		3,840		3,840
Securities sold under agreements to repurchase	Level 3	1,665,693		1,665,751		1,858,678		1,858,731
Other borrowings	Level 3	103,843		110,087		104,058		111,102
Derivative instruments	Level 2	10,163		10,163		10,722		10,722
Derivative instruments	Level 3	185		185		226		226