Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest Revenue
Loans and leases	$ 461,076	$ 496,782	$ 517,013
Deposits with other banks	701	355	131
Federal funds sold and securities purchased under agreement to resell	167	606	74
Held-to-maturity securities:
Taxable	13,080	36,278	46,957
Tax-exempt	5,638	10,409	8,852
Available-for-sale securities:
Taxable	43,989	32,033	35,026
Tax-exempt	10,983	3,275	3,396
Loans held for sale	2,219	3,024	3,965
Total interest revenue	537,853	582,762	615,414
Deposits:
Interest bearing demand	22,646	35,187	40,047
Savings	3,211	3,576	3,700
Other time	61,709	83,999	101,308
Federal funds purchased and securities sold under agreement to repurchase	458	841	1,629
FHLB borrowings	3,459	6,545	11,597
Junior subordinated debt	11,451	11,461	11,630
Other	6	11	604
Total interest expense	102,940	141,620	170,515
Net interest revenue	434,913	441,142	444,899
Provision for credit losses	130,081	204,016	117,324
Net interest revenue, after provision for credit losses	304,832	237,126	327,575
Noninterest Revenue
Mortgage lending	17,069	29,745	32,225
Credit card, debit card and merchant fees	42,373	37,663	34,244
Service charges	66,670	70,690	72,864
Trust income	12,186	11,149	9,698
Securities gains (losses), net	12,127	2,569	(55)
Insurance commissions	86,918	82,172	80,937
Other	33,502	30,156	45,363
Total noninterest revenue	270,845	264,144	275,276
Noninterest Expense
Salaries and employee benefits	282,880	271,688	278,734
Occupancy, net of rental income	42,362	43,008	42,108
Equipment	21,707	22,598	23,508
Deposit insurance assessments	21,316	19,259	19,672
Prepayment penalty on FHLB borrowings	9,778	0	0
Other	155,590	130,480	125,995
Total noninterest expense	533,633	487,033	490,017
Income before tax benefit and equity in undistributed earnings	42,044	14,237	112,834
Income tax expense (benefit)	4,475	(8,705)	30,105
Net Income	$ 37,569	$ 22,942	$ 82,729
Net Income Per Share: Basic	$ 0.45	$ 0.28	$ 0.99
Diluted	$ 0.45	$ 0.27	$ 0.99