Condensed Consolidated Statements of Income and Other Comprehensive Income (unaudited) (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Interest income:
Interest and fees on loans, including loans held for sale	$ 36,180	$ 35,402	$ 109,048	$ 105,718
Interest and dividends on securities
Taxable	2,598	2,308	7,631	6,916
Tax exempt	455	388	1,263	1,206
Interest and dividends on Federal Reserve and Federal Home Loan Bank stock	329	65	1,042	1,027
Other, including interest on federal funds sold	146	152	425	389
Total interest income	39,708	38,315	119,409	115,256
Interest expense:
Interest on deposits	5,193	7,454	16,534	22,687
Interest on repurchase agreements and other short-term borrowings	397	466	1,251	1,513
Interest on advances from Federal Home Loan Bank	23	18	77	56
Interest on long-term debt	1,000	1,000	3,000	3,000
Total interest expense	6,613	8,938	20,862	27,256
Net interest income	33,095	29,377	98,547	88,000
Provision for loan losses	2,515	3,676	10,222	12,504
Net interest income after provision for loan losses	30,580	25,701	88,325	75,496
Noninterest income:
Service charges on deposit accounts	6,681	5,920	18,999	17,166
Gains on sales of loans, net	438	575	1,166	1,354
Trust income	1,597	1,492	4,790	4,374
Loan related fees	250	862	1,609	1,748
Bank owned life insurance	433	451	1,269	1,263
Other noninterest income	1,543	1,297	4,440	3,975
Total noninterest income	10,942	10,597	32,273	29,880
Noninterest expense:
Officer salaries and employee benefits	2,087	2,193	6,597	6,039
Other salaries and employee benefits	10,153	9,367	30,444	28,598
Occupancy, net	2,013	1,725	6,043	5,208
Equipment	1,008	950	2,781	2,892
Data processing	1,550	1,759	4,992	5,042
Bank franchise tax	1,120	1,002	3,403	2,957
Legal fees	631	700	2,131	1,980
Professional fees	285	315	970	873
FDIC insurance	591	1,118	2,554	3,257
Other real estate owned provision and expense	1,465	584	4,497	2,062
Other noninterest expense	4,924	4,285	15,108	12,186
Total noninterest expense	25,827	23,998	79,520	71,094
Income before income taxes	15,695	12,300	41,078	34,282
Income taxes	5,030	3,850	12,139	10,488
Net income	10,665	8,450	28,939	23,794
Other comprehensive income, net of tax:
Unrealized holding gains on securities available-for-sale	2,661	2,225	6,307	3,506
Comprehensive income	$ 13,326	$ 10,675	$ 35,246	$ 27,300
Basic earnings per share (in dollars per share)	$ 0.70	$ 0.55	$ 1.89	$ 1.56
Diluted earnings per share (in dollars per share)	$ 0.70	$ 0.55	$ 1.89	$ 1.56
Weighted average shares outstanding-basic (in shares)	15,318	15,239	15,307	15,223
Weighted average shares outstanding-diluted (in shares)	15,339	15,275	15,331	15,260
Dividends declared per share (in dollars per share)	$ 0.310	$ 0.305	$ 0.920	$ 0.905