Consolidated Statements of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Interest income:
Loans, including fees	$ 162,205	$ 143,493	$ 131,770
Investment securities:
Taxable	7,641	9,985	8,501
Tax-exempt	854	853	936
Federal funds sold and securities purchased under agreements to resell	1,018	1,023	591
Total interest income	171,718	155,354	141,798
Interest expense:
Deposits	17,557	28,526	30,731
Federal funds purchased and securities sold under agreements to repurchase	527	630	502
Other borrowings	2,182	3,581	5,975
Total interest expense	20,266	32,737	37,208
Net interest income	151,452	122,617	104,590
Provision for loan losses	30,236	54,282	26,712
Net interest income after provision for loan losses	121,216	68,335	77,878
Noninterest income:
Gains on acquisitions	16,529	98,081
Service charges on deposit accounts	22,654	21,342	15,498
Bankcard services income	11,721	8,987	5,043
Mortgage banking income	6,271	6,564	6,552
Trust and investment services income	5,464	4,251	2,517
Securities gains, net	323	292	82
Total other-than-temporary impairment losses	(115)	(1,281)	(10,494)
Portion of impairment losses recognized in other comprehensive income		(5,489)	5,489
Net impairment losses recognized in earnings	(115)	(6,770)	(5,005)
Accretion (amortization) of FDIC indemnification asset	(10,135)	2,443
Other	2,407	2,545	1,559
Total noninterest income	55,119	137,735	26,246
Noninterest expense:
Salaries and employee benefits	68,937	60,795	40,787
Net occupancy expense	9,674	8,544	6,392
Furniture and equipment expense	8,476	7,530	6,049
Merger expense	3,198	5,504
FDIC assessment and other regulatory charges	4,573	5,283	5,449
OREO expense and loan related	14,354	5,304	5,641
Advertising and marketing	2,729	3,618	2,497
Federal Home Loan Bank advances prepayment fee		3,189
Professional fees	1,473	2,046	1,358
Amortization of intangibles	1,991	1,650	526
Other	27,573	21,779	14,947
Total noninterest expense	142,978	125,242	83,646
Earnings:
Income before provision for income taxes	33,357	80,828	20,478
Provision for income taxes	10,762	28,946	6,883
Net income	22,595	51,882	13,595
Preferred stock dividends			1,115
Accretion on preferred stock discount			3,559
Net income available to common shareholders	$ 22,595	$ 51,882	$ 8,921
Earnings per common share:
Basic (in dollars per share)	$ 1.65	$ 4.11	$ 0.74
Diluted (in dollars per share)	$ 1.63	$ 4.08	$ 0.74
Dividends per common share (in dollars per share)	$ 0.68	$ 0.68	$ 0.68
Weighted average common shares outstanding:
Basic (in shares)	13,677	12,618	12,061
Diluted (in shares)	13,751	12,720	12,109