Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Interest income:
Interest and fees on loans	$ 54,901	$ 57,418	$ 165,247	$ 173,412
Interest and dividends on investment securities:
Taxable	7,660	9,194	23,377	28,357
Exempt from federal taxes	1,153	1,223	3,594	3,667
Interest on deposits in banks	207	336	717	852
Interest on federal funds sold	8	4	17	11
Total interest income	63,929	68,175	192,952	206,299
Interest expense:
Interest on deposits	3,821	5,414	12,214	17,455
Interest on securities sold under repurchase agreements	58	144	232	452
Interest on long-term debt	487	502	1,450	1,495
Interest on preferred stock pending redemption	0	0	159	0
Interest on subordinated debentures held by subsidiary trusts	607	1,110	1,904	4,084
Total interest expense	4,973	7,170	15,959	23,486
Net interest income	58,956	61,005	176,993	182,813
Provision for loan losses	(3,000)	9,500	(2,125)	32,750
Net interest income after provision for loan losses	61,956	51,505	179,118	150,063
Non-interest income:
Income from the origination and sale of loans	7,934	11,665	28,652	29,469
Other service charges, commissions and fees	9,286	8,774	26,519	25,452
Investment Advisory, Management and Administrative Fees	4,581	3,557	12,735	10,655
Service charges on deposit accounts	4,360	4,395	12,751	13,011
Investment securities gains, net	30	66	26	295
Other income	1,416	1,725	5,322	5,344
Total non-interest income	27,607	30,182	86,005	84,226
Non-interest expense:
Salaries and wages	22,806	23,341	69,681	66,545
Employee benefits	7,328	7,447	23,049	23,232
Occupancy, net	4,292	3,793	12,381	11,818
Furniture and equipment	3,147	3,231	9,362	9,558
Outsourced technology services	2,295	2,182	6,647	6,627
OREO expense, net of income	18	2,612	999	5,523
FDIC insurance premiums	1,205	1,622	3,938	4,818
Professional fees	1,135	1,050	3,398	2,985
Mortgage servicing rights amortization	629	879	2,187	2,591
Mortgage servicing rights impairment recovery	(62)	55	(121)	(761)
Core deposit intangibles amortization	355	355	1,064	1,066
Other expenses	9,431	10,497	31,699	37,801
Total non-interest expense	52,579	57,064	164,284	171,803
Income before income tax expense	36,984	24,623	100,839	62,486
Income tax expense	13,172	8,468	35,478	21,107
Net income	23,812	16,155	65,361	41,379
Preferred stock dividends	0	863	0	2,569
Net income available to common stockholders	$ 23,812	$ 15,292	$ 65,361	$ 38,810
Basic earnings per common share	$ 0.54	$ 0.36	$ 1.50	$ 0.90
Diluted earnings per common share	$ 0.54	$ 0.35	$ 1.49	$ 0.90