Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest income:
Interest and fees on loans	$ 154,006	$ 130,073	$ 108,400
Interest on debt securities:
Taxable	9,877	11,142	7,031
Nontaxable	1,009	695	157
Interest on federal funds sold	0	2	10
Interest on interest-bearing deposits	257	560	370
Dividends on equity securities	315	368	426
Total interest income	165,464	142,840	116,394
Interest expense:
Interest-bearing transaction accounts	721	811	847
Money market accounts	4,679	7,987	6,245
Savings	275	112	35
Certificates of deposit:
$100 and over	7,077	9,133	9,854
Other	2,654	3,615	5,886
Subordinated debentures	4,082	4,515	4,954
Federal Home Loan Bank advances	3,054	3,550	4,326
Notes payable and other borrowings	625	432	264
Total interest expense	23,167	30,155	32,411
Net interest income	142,297	112,685	83,983
Provision for loan losses not covered under FDIC loss share	8,757	13,300	33,735
Provision for loan losses covered under FDIC loss share	14,033	2,803	0
Net interest income after provision for loan losses	119,507	96,582	50,248
Noninterest income:
Wealth Management revenue	7,300	6,841	6,414
Service charges on deposit accounts	5,664	5,091	4,739
Other service charges and fee income	2,504	1,679	1,128
Gain on sale of other real estate	2,225	862	79
Gain on state tax credits, net	2,207	3,645	2,250
Gain on sale of investment securities	1,156	1,450	1,987
Change in FDIC loss share receivable	(14,869)	(3,494)	99
Miscellaneous income	2,897	2,434	1,664
Total noninterest income	9,084	18,508	18,360
Noninterest expense:
Employee compensation and benefits	43,497	36,839	28,316
Occupancy	5,393	5,001	4,297
Furniture and equipment	1,636	1,601	1,393
Data processing	3,454	3,159	2,234
FDIC and other insurance	3,491	4,119	4,402
Loan legal and other real estate expense	6,732	10,703	9,941
Other	22,474	16,296	11,629
Total noninterest expense	86,677	77,718	62,212
Income before income tax expense	41,914	37,372	6,396
Income tax expense (benefit)	13,618	11,949	823
Net income	28,296	25,423	5,573
Net income available to common shareholders	$ 25,101	$ 22,899	$ 3,106
Earnings per common share
Basic	$ 1.41	$ 1.37	$ 0.21
Diluted	$ 1.37	$ 1.34	$ 0.21