Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
INTEREST REVENUE:
Loans and leases	$ 98,524	$ 107,737	$ 197,616	$ 216,749
Deposits with other banks	483	382	1,085	783
Federal funds sold and securities purchased under agreement to resell		1		1
Available-for-sale securities:
Taxable	8,405	10,188	17,105	21,350
Tax-exempt	3,911	4,210	7,871	8,466
Loans held for sale	686	686	1,359	1,230
Total interest revenue	112,009	123,204	225,036	248,579
Deposits:
Interest bearing demand	2,423	4,185	5,548	8,634
Savings	422	691	935	1,405
Other time	7,671	10,275	15,712	21,566
Federal funds purchased and securities sold under agreement to repurchase	70	66	133	129
Federal Home Loan Bank borrowings	349	366	697	733
Junior subordinated debt	2,860	2,879	5,717	5,758
Other	1	1	3	3
Total interest expense	13,796	18,463	28,745	38,228
Net interest revenue	98,213	104,741	196,291	210,351
Provision for credit losses	3,000	6,000	7,000	16,000
Net interest revenue, after provision for credit losses	95,213	98,741	189,291	194,351
NONINTEREST REVENUE:
Mortgage lending	17,892	11,040	30,238	26,182
Credit card, debit card and merchant fees	8,324	7,787	15,847	15,310
Service charges	12,824	13,697	25,656	28,813
Trust income	3,192	3,139	6,402	5,421
Security gains, net	3	177	22	251
Insurance commissions	25,862	22,964	52,503	46,117
Other	8,012	7,664	16,759	16,734
Total noninterest revenue	76,109	66,468	147,427	138,828
NONINTEREST EXPENSE:
Salaries and employee benefits	78,284	77,661	157,698	152,592
Occupancy, net of rental income	10,577	10,487	20,814	20,553
Equipment	4,585	5,124	9,533	10,457
Deposit insurance assessments	2,939	3,994	5,743	9,377
Voluntary early retirement expense	10,850		10,850
Other	35,016	39,240	72,984	79,207
Total noninterest expense	142,251	136,506	277,622	272,186
Income (loss) before income taxes	29,071	28,703	59,096	60,993
Income tax expense	8,316	8,079	17,536	17,503
Net income (loss)	$ 20,755	$ 20,624	$ 41,560	$ 43,490
Earnings per share:
Basic (in dollars per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.47
Diluted (in dollars per share)	$ 0.22	$ 0.22	$ 0.44	$ 0.47
Dividends declared per common share (in dollars per share)	$ 0.01	$ 0.01	$ 0.02	$ 0.02