Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Interest income:
Interest and fees on non-covered loans	$ 46,530	$ 49,760	$ 53,414
Interest and fees on covered loans	36,418	34,819	19,173
Interest on taxable investment securities	5,333	3,967	2,348
Interest on tax-exempt investment securities	1,178	902	716
Other	251	259	298
Total interest income	89,710	89,707	75,949
Interest expense:
Interest on deposits	6,581	9,492	11,091
Interest on other borrowed funds	0	0	243
Interest on junior subordinated debentures	532	489	496
Total interest expense	7,113	9,981	11,830
Net interest income	82,597	79,726	64,119
Provision for loan losses, non-covered loans	7,100	10,500	12,150
Provision (recovery) for loan losses, covered loans	2,644	(450)	1,336
Net interest income after provision for loan losses	72,853	69,676	50,633
Noninterest income:
Service charges and fees	3,560	3,818	3,346
Electronic banking income	3,666	3,197	2,306
Investment products	1,295	1,072	522
Gain on sale of investment securities, net	931	0	0
Bank owned life insurance income	191	311	226
Income from the sale of mortgage loans	3,848	1,197	1,134
SBA premium income	602	444	578
Change in FDIC indemnification asset	(9,126)	(9,232)	1,884
Gain on disposition of covered assets	1,877	6,312	1,840
Bargain purchase gain on acquisition	0	0	19,925
Other	1,402	2,093	1,770
Total noninterest income	8,246	9,212	33,531
Noninterest expense:
Salaries and benefits	29,944	27,496	23,527
Occupancy and equipment	6,883	6,553	5,631
Office supplies and printing	1,643	1,665	1,594
Data processing	2,134	1,916	1,434
Consulting and professional fees	904	1,152	891
Intangible amortization	512	622	672
Merger related expenses	0	324	2,113
FDIC premiums	1,281	1,818	1,609
FDIC clawback liability	1,680	1,576	0
Non-covered OREO and repossession expenses, net	1,841	1,358	1,196
Covered OREO and repossession expenses, net	1,699	2,192	1,240
Other	7,878	9,153	6,890
Total noninterest expense	56,399	55,825	46,797
Income before provision for income tax	24,700	23,063	37,367
Provision for income tax	7,856	7,111	11,797
Net income before preferred dividends	16,844	15,952	25,570
Preferred stock dividends and discount accretion	0	1,084	1,659
Net income available to common shareholders	$ 16,844	$ 14,868	$ 23,911
Net income available per common share, basic (in dollars per share)	$ 1.09	$ 0.97	$ 1.56
Net income available per common share, diluted (in dollars per share)	$ 1.09	$ 0.97	$ 1.55
Average number of common shares outstanding, basic (in shares)	15,422,000	15,329,000	15,307,000
Average number of common shares outstanding, diluted (in shares)	15,455,000	15,393,000	15,465,000