Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Interest income:
Interest and fees on loans	$ 57,910	$ 62,391
Interest and dividends on investment securities:
Taxable	9,705	9,911
Exempt from federal taxes	1,204	1,171
Interest on deposits in banks	237	367
Interest on federal funds sold	1	3
Total interest income	69,057	73,843
Interest expense:
Interest on deposits	6,262	9,871
Interest on securities sold under repurchase agreements	156	237
Interest on long-term debt	498	489
Interest on subordinated debentures held by subsidiary trusts	1,507	1,448
Total interest expense	8,423	12,045
Net interest income	60,634	61,798
Provision for loan losses	11,250	15,000
Net interest income after provision for loan losses	49,384	46,798
Non-interest income:
Other service charges, commissions and fees	8,424	7,380
Income from the origination and sale of loans	8,384	3,445
Service charges on deposit accounts	4,161	4,110
Wealth management revenues	3,283	3,295
Investment securities gains, net	31	2
Other income	2,099	1,927
Total non-interest income	26,382	20,159
Non-interest expense:
Salaries and wages	21,564	20,203
Employee benefits	8,966	7,499
Occupancy, net	3,988	4,215
Furniture and equipment	3,138	3,220
Outsourced technology services	2,266	2,241
FDIC insurance premiums	1,595	2,466
OREO expense, net of income	1,105	1,711
Mortgage servicing rights amortization	895	807
Mortgage servicing rights impairment recovery	(868)	(347)
Core deposit intangibles amortization	355	362
Other expenses	14,436	10,581
Total non-interest expense	57,440	52,958
Income before income tax expense	18,326	13,999
Income tax expense	6,112	4,493
Net income	12,214	9,506
Preferred stock dividends	853	844
Net income available to common stockholders	$ 11,361	$ 8,662
Basic earnings per common share	$ 0.26	$ 0.20
Diluted earnings per common share	$ 0.26	$ 0.20