Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Assets:
Cash and due from banks	$ 207,128		$ 223,616
Interest-bearing deposits	105,394		23,674
Securities available-for-sale, at fair value	2,873,886		3,106,931
Securities held-to-maturity (fair value of $3,699,825 and $3,370,912)	3,641,979		3,358,721
Federal Home Loan Bank and Federal Reserve Bank stock	171,174		158,878
Loans held for sale	26,083		20,802
Loans and leases	13,513,502	[1]	12,699,776	[1]
Allowance for loan and lease losses	(156,482)		(152,573)
Loans and leases, net	13,357,020		12,547,203
Deferred tax asset, net	62,884		65,109
Premises and equipment, net	118,608		121,605
Goodwill	529,887		529,887
Other intangible assets, net	3,082		5,351
Cash surrender value of life insurance policies	438,100		430,535
Accrued interest receivable and other assets	291,657		260,687
Total assets	21,826,882		20,852,999
Liabilities and shareholders' equity:
Non-interest-bearing	3,256,741		3,128,152
Interest-bearing	12,290,177		11,726,268
Total deposits	15,546,918		14,854,420
Securities sold under agreements to repurchase and other borrowings	1,236,975		1,331,662
Federal Home Loan Bank advances	2,290,204		2,052,421
Long-term debt	226,208		228,365
Accrued expenses and other liabilities	215,727		176,943
Total liabilities	19,516,032		18,643,811
Shareholders’ equity:
Common stock, $.01 par value: Authorized - 200,000,000 shares: Issued - 93,381,269 and 93,366,673 shares	934		934
Paid-in capital	1,128,453		1,125,584
Retained earnings	1,172,372		1,080,488
Treasury stock, at cost (3,292,072 and 3,407,256 shares)	(106,639)		(100,918)
Accumulated other comprehensive loss	(35,919)		(48,549)
Total shareholders' equity	2,310,850		2,209,188
Total liabilities and shareholders' equity	21,826,882		20,852,999
Series A Preferred Stock [Member]
Shareholders’ equity:
Preferred stock, $.01 par value; Authorized - 3,000,000 shares:	28,939		28,939
Series E Preferred Stock [Member]
Shareholders’ equity:
Preferred stock, $.01 par value; Authorized - 3,000,000 shares:	$ 122,710		$ 122,710

[1] Loans and leases include net deferred fees and unamortized premiums of $14.5 million and $13.3 million at September 30, 2014 and December 31, 2013, respectively.