Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Interest income:
Interest and fees on loans	$ 55,493	$ 57,910
Interest and dividends on investment securities:
Taxable	8,046	9,705
Exempt from federal taxes	1,226	1,204
Interest on deposits in banks	298	237
Interest on federal funds sold	4	1
Total interest income	65,067	69,057
Interest expense:
Interest on deposits	4,355	6,262
Interest on securities sold under repurchase agreements	100	156
Interest on long-term debt	480	498
Interest on preferred stock pending redemption	159	0
Interest on subordinated debentures held by subsidiary trusts	696	1,507
Total interest expense	5,790	8,423
Net interest income	59,277	60,634
Provision for loan losses	500	11,250
Net interest income after provision for loan losses	58,777	49,384
Non-interest income:
Income from the origination and sale of loans	10,675	8,384
Other service charges, commissions and fees	8,256	8,424
Wealth management revenues	4,134	3,283
Service charges on deposit accounts	4,068	4,161
Investment securities gains, net	8	31
Other income	1,678	2,099
Total non-interest income	28,819	26,382
Non-interest expense:
Salaries and wages	23,405	21,564
Employee benefits	8,175	8,966
Occupancy, net	4,026	3,988
Furniture and equipment	3,052	3,138
Outsourced technology services	2,157	2,266
OREO expense, net of income	1,896	1,105
FDIC insurance premiums	1,377	1,595
Professional fees	1,127	933
Mortgage servicing rights amortization	839	895
Mortgage servicing rights impairment recovery	(48)	(868)
Core deposit intangibles amortization	354	355
Other expenses	10,325	13,503
Total non-interest expense	56,685	57,440
Income before income tax expense	30,911	18,326
Income tax expense	10,867	6,112
Net income	20,044	12,214
Preferred stock dividends	0	853
Net income available to common stockholders	$ 20,044	$ 11,361
Basic earnings per common share	$ 0.46	$ 0.26
Diluted earnings per common share	$ 0.46	$ 0.26