Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Assets:
Cash and due from banks	$ 179,068		$ 252,283
Interest-bearing deposits	32,601		98,205
Securities available for sale, at fair value	3,257,360		3,136,160
Securities held-to-maturity (fair value of $3,174,148 and $3,264,718)	3,129,864		3,107,529
Federal Home Loan Bank and Federal Reserve Bank stock, at cost	158,878		155,630
Loans held for sale	81,161		107,633
Loans and leases	12,246,293	[1]	12,028,696	[1]
Allowance for loan and lease losses	(163,442)		(177,129)
Loans and leases, net	12,082,851		11,851,567
Deferred tax asset, net	73,166		68,681
Premises and equipment, net	122,704		134,562
Goodwill	529,887		529,887
Other intangible assets, net	7,786		10,270
Cash surrender value of life insurance policies	423,598		418,293
Prepaid FDIC premiums	0		16,323
Accrued interest receivable and other assets	250,314		259,742
Total assets	20,329,238		20,146,765
Liabilities and shareholders' equity:
Non-interest-bearing	2,956,320		2,881,131
Interest-bearing	11,879,255		11,649,704
Total deposits	14,835,575		14,530,835
Securities sold under agreements to repurchase and other borrowings	1,213,349		1,076,160
Federal Home Loan Bank advances	1,627,517		1,827,612
Long-term debt	229,928		334,276
Accrued expenses and other liabilities	295,394		284,352
Total liabilities	18,201,763		18,053,235
Shareholders’ equity:
Common stock, $.01 par value; Authorized - 200,000,000 shares Issued - 93,735,918 and 90,735,596 shares	933		907
Paid-in capital	1,125,861		1,145,620
Retained earnings	1,023,243		1,000,427
Less: Treasury stock, at cost (3,648,844 and 5,772,006 shares)	(109,072)		(172,807)
Accumulated other comprehensive loss	(65,139)		(32,266)
Total shareholders' equity	2,127,475		2,093,530
Total liabilities and shareholders' equity	20,329,238		20,146,765
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] The ending balance includes net deferred fees and unamortized premiums of $12.5 million and $12.7 million at June 30, 2013 and December 31, 2012, respectively.