Consolidated Statements of Operations (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Interest Income
Residential real estate loans	$ 29,525	$ 30,850	$ 33,060
Commercial loans	127,450	121,425	130,249
Consumer and other loans	32,089	35,096	40,538
Investment securities	74,512	66,386	76,262
Total interest income	263,576	253,757	280,109
Interest Expense
Deposits	13,870	18,183	25,269
Securities sold under agreements to repurchase	867	1,308	1,353
Federal Home Loan Bank advances	10,610	12,566	12,687
Federal funds purchased and other borrowed funds	206	229	224
Subordinated debentures	3,205	3,428	4,961
Total interest expense	28,758	35,714	44,494
Net Interest Income	234,818	218,043	235,615
Provision for loan losses	6,887	21,525	64,500
Net interest income after provision for loan losses	227,931	196,518	171,115
Non-Interest Income
Service charges and other fees	49,478	45,343	44,194
Miscellaneous loan fees and charges	4,982	4,363	3,919
Gain on sale of loans	28,517	32,227	21,132
(Loss) gain on sale of investments	(299)	0	346
Other income	10,369	9,563	8,608
Total non-interest income	93,047	91,496	78,199
Non-Interest Expense
Compensation and employee benefits	104,221	95,373	85,691
Occupancy and equipment	24,875	23,837	23,599
Advertising and promotions	6,913	6,413	6,469
Outsourced data processing	4,493	3,324	3,153
Other real estate owned	7,196	18,964	27,255
Regulatory assessments and insurance	6,362	7,313	9,583
Core deposit intangible amortization	2,401	2,110	2,473
Goodwill impairment charge	0	0	40,159
Other expense	38,856	36,087	33,742
Total non-interest expense	195,317	193,421	232,124
Income Before Income Taxes	125,661	94,593	17,190
Federal and state income tax expense (benefit)	30,017	19,077	(281)
Net Income	$ 95,644	$ 75,516	$ 17,471
Basic earnings per share	$ 1.31	$ 1.05	$ 0.24
Diluted earnings per share	$ 1.31	$ 1.05	$ 0.24
Dividends declared per share	$ 0.60	$ 0.53	$ 0.52
Average outstanding shares - basic	73,191,713	71,928,570	71,915,073
Average outstanding shares - diluted	73,260,278	71,928,656	71,915,073