Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Interest income:
Interest and fees on loans	$ 55,565	$ 54,853	$ 109,283	$ 110,346
Interest and dividends on investment securities:
Taxable	7,309	7,671	14,949	15,717
Exempt from federal taxes	1,083	1,215	2,180	2,441
Interest on deposits in banks	225	212	456	510
Interest on federal funds sold	3	5	4	9
Total interest income	64,185	63,956	126,872	129,023
Interest expense:
Interest on deposits	3,327	4,038	6,751	8,393
Interest on securities sold under repurchase agreements	63	74	129	174
Interest on long-term debt	476	483	949	963
Interest on preferred stock pending redemption	0	0	0	159
Interest on subordinated debentures held by subsidiary trusts	592	601	1,180	1,297
Total interest expense	4,458	5,196	9,009	10,986
Net interest income	59,727	58,760	117,863	118,037
Provision for loan losses	(2,001)	375	(7,001)	875
Net interest income after provision for loan losses	61,728	58,385	124,864	117,162
Non-interest income:
Other service charges, commissions and fees	9,699	8,977	18,855	17,233
Income from the origination and sale of loans	6,380	10,043	11,040	20,718
Investment Advisory, Management and Administrative Fees	4,609	4,020	9,064	8,154
Service charges on deposit accounts	3,929	4,323	7,804	8,391
Investment securities gains, net	17	(12)	88	(4)
Other income	1,937	2,228	3,826	3,906
Total non-interest income	26,571	29,579	50,677	58,398
Non-interest expense:
Salaries and wages	24,440	23,535	46,882	46,977
Employee benefits	7,164	7,546	15,477	15,721
Occupancy, net	4,253	4,063	8,492	8,089
Furniture and equipment	3,157	3,163	6,358	6,215
Outsourced technology services	2,309	2,195	4,609	4,352
OREO expense, net of income	(134)	(915)	(153)	981
FDIC insurance premiums	1,093	1,356	2,209	2,733
Professional fees	1,278	1,136	2,648	2,263
Mortgage servicing rights amortization	583	719	1,183	1,558
Mortgage servicing rights impairment recovery	(11)	(11)	(56)	(59)
Core deposit intangibles amortization	354	355	708	709
Other expenses	10,837	11,878	21,304	22,166
Non-core acquisition expenses	597	0	597	0
Total non-interest expense	55,920	55,020	110,258	111,705
Income before income tax expense	32,379	32,944	65,283	63,855
Income tax expense	11,302	11,439	22,813	22,306
Net income	$ 21,077	$ 21,505	$ 42,470	$ 41,549
Basic earnings per common share	$ 0.48	$ 0.49	$ 0.96	$ 0.96
Diluted earnings per common share	$ 0.47	$ 0.49	$ 0.95	$ 0.95