Condensed Consolidated Statements of Income and Other Comprehensive Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Interest income:
Interest and fees on loans, including loans held for sale	$ 34,298	$ 36,180	$ 103,628	$ 109,048
Interest and dividends on securities
Taxable	3,148	2,598	9,001	7,631
Tax exempt	534	455	1,525	1,263
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	345	329	1,054	1,042
Other, including interest on federal funds sold	125	146	423	425
Total interest income	38,450	39,708	115,631	119,409
Interest expense:
Interest on deposits	4,777	5,193	14,178	16,534
Interest on repurchase agreements and other short-term borrowings	294	397	953	1,251
Interest on advances from Federal Home Loan Bank	8	23	27	77
Interest on long-term debt	325	1,000	2,102	3,000
Total interest expense	5,404	6,613	17,260	20,862
Net interest income	33,046	33,095	98,371	98,547
Provision for loan losses	2,919	2,515	6,504	10,222
Net interest income after provision for loan losses	30,127	30,580	91,867	88,325
Noninterest income:
Service charges on deposit accounts	6,038	6,681	17,865	18,999
Gains on sales of loans, net	660	438	1,982	1,166
Trust income	1,734	1,597	5,169	4,790
Loan related fees	631	250	2,528	1,609
Bank owned life insurance	462	433	1,321	1,269
Securities gains	0	0	819	0
Other noninterest income	1,313	1,543	4,330	4,440
Total noninterest income	10,838	10,942	34,014	32,273
Noninterest expense:
Officer salaries and employee benefits	3,048	2,087	7,727	6,597
Other salaries and employee benefits	10,237	10,153	30,773	30,444
Occupancy, net	1,969	2,013	5,681	6,043
Equipment	957	1,008	2,870	2,781
Data processing	1,644	1,550	4,771	4,992
Bank franchise tax	1,130	1,120	3,413	3,403
Legal fees	522	631	1,619	2,131
Professional fees	411	285	1,056	970
FDIC insurance	643	591	1,913	2,554
Other real estate owned provision and expense	1,123	1,465	2,672	4,497
Other noninterest expense	4,129	4,924	13,216	15,108
Total noninterest expense	25,813	25,827	75,711	79,520
Income before income taxes	15,152	15,695	50,170	41,078
Income taxes	4,943	5,030	15,860	12,139
Net income	10,209	10,665	34,310	28,939
Unrealized holding gains on securities available-for-sale:
Unrealized holding gains arising during the period	3,337	4,093	7,505	9,702
Less: Reclassification adjustments for realized gains included in net income	0	0	(819)	0
Tax expense	1,168	1,432	2,340	3,395
Other comprehensive income, net of tax	2,169	2,661	4,346	6,307
Comprehensive income	$ 12,378	$ 13,326	$ 38,656	$ 35,246
Basic earnings per share (in dollars per share)	$ 0.66	$ 0.70	$ 2.22	$ 1.89
Diluted earnings per share (in dollars per share)	$ 0.66	$ 0.70	$ 2.21	$ 1.89
Weighted average shares outstanding-basic (in shares)	15,491	15,318	15,450	15,307
Weighted average shares outstanding-diluted (in shares)	15,555	15,339	15,501	15,331
Dividends declared per share (in dollars per share)	$ 0.315	$ 0.310	$ 0.935	$ 0.920