Consolidated Statements of Income (Unaudited) (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 income:
Interest and fees on loans	$ 54,853	$ 58,084	$ 110,346	$ 115,994
Interest and dividends on investment securities:
Taxable	7,671	9,458	15,717	19,163
Exempt from federal taxes	1,215	1,240	2,441	2,444
Interest on deposits in banks	212	279	510	516
Interest on federal funds sold	5	6	9	7
Total interest income	63,956	69,067	129,023	138,124
Interest expense:
Interest on deposits	4,038	5,779	8,393	12,041
Interest on securities sold under repurchase agreements	74	152	174	308
Interest on long-term debt	483	495	963	993
Interest on preferred stock pending redemption	0	0	159	0
Interest on subordinated debentures held by subsidiary trusts	601	1,467	1,297	2,974
Total interest expense	5,196	7,893	10,986	16,316
Net interest income	58,760	61,174	118,037	121,808
Provision for loan losses	375	12,000	875	23,250
Net interest income after provision for loan losses	58,385	49,174	117,162	98,558
Non-interest income:
Income from the origination and sale of loans	10,043	9,420	20,718	17,804
Other service charges, commissions and fees	8,977	8,254	17,233	16,678
Investment Advisory, Management and Administrative Fees	4,020	3,815	8,154	7,098
Service charges on deposit accounts	4,323	4,455	8,391	8,616
Investment securities gains, net	(12)	198	(4)	229
Other income	2,228	1,520	3,906	3,619
Total non-interest income	29,579	27,662	58,398	54,044
Non-interest expense:
Salaries and wages	23,470	21,640	46,875	43,204
Employee benefits	7,546	6,819	15,721	15,785
Occupancy, net	4,063	4,037	8,089	8,025
Furniture and equipment	3,163	3,189	6,215	6,327
Outsourced technology services	2,195	2,179	4,352	4,445
OREO expense, net of income	(915)	1,806	981	2,911
FDIC insurance premiums	1,356	1,601	2,733	3,196
Professional fees	1,136	1,002	2,263	1,935
Mortgage servicing rights amortization	719	817	1,558	1,712
Mortgage servicing rights impairment recovery	(11)	52	(59)	(816)
Core deposit intangibles amortization	355	355	709	710
Other expenses	11,943	13,802	22,268	27,305
Total non-interest expense	55,020	57,299	111,705	114,739
Income before income tax expense	32,944	19,537	63,855	37,863
Income tax expense	11,439	6,527	22,306	12,639
Net income	21,505	13,010	41,549	25,224
Preferred stock dividends	0	853	0	1,706
Net income available to common stockholders	$ 21,505	$ 12,157	$ 41,549	$ 23,518
Basic earnings per common share	$ 0.49	$ 0.28	$ 0.96	$ 0.55
Diluted earnings per common share	$ 0.49	$ 0.28	$ 0.95	$ 0.55