Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Assets
Cash and due from banks	$ 183,158	$ 248,214
Interest-bearing deposits in banks	443,358	722,763
Total cash and cash equivalents	626,516	970,977
Securities available for sale, at fair value	1,951,548	1,745,004
Securities held to maturity, fair values of $203,100 and $211,498, respectively	198,442	205,062
Mortgage loans held for sale	188,037	267,475
Loans covered by loss share agreements	1,004,173	1,092,756
Non-covered loans, net of unearned income	7,590,802	7,405,824
Total loans, net of unearned income	8,594,975	8,498,580
Allowance for credit losses	(189,725)	(251,603)
Loans, net	8,405,250	8,246,977
FDIC loss share receivables	284,471	423,069
Premises and equipment, net	304,353	303,523
Goodwill	401,872	401,872
Other assets	590,710	565,719
Total Assets	12,951,199	13,129,678
Liabilities
Noninterest-bearing	1,971,809	1,967,662
Interest-bearing	8,714,458	8,780,615
Total deposits	10,686,267	10,748,277
Short-term borrowings	294,156	303,045
Long-term debt	323,046	423,377
Other liabilities	123,660	125,111
Total Liabilities	11,427,129	11,599,810
Shareholders' Equity
Common stock, $1 par value - 50,000,000 shares authorized; 31,917,385 shares issued	31,917	31,917
Additional paid-in capital	1,169,421	1,176,180
Retained earnings	402,094	411,472
Accumulated other comprehensive income	23,292	24,477
Treasury stock at cost - 2,225,604 and 2,427,640 shares, respectively	(102,654)	(114,178)
Total Shareholders' Equity	1,524,070	1,529,868
Total Liabilities and Shareholders' Equity	$ 12,951,199	$ 13,129,678