Condensed Consolidated Statements of Income and Comprehensive Income (unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Interest income:
Interest and fees on loans, including loans held for sale	$ 32,191	$ 33,290	$ 95,741	$ 98,810
Interest and dividends on securities
Taxable	2,763	3,196	8,616	9,220
Tax exempt	664	561	1,912	1,676
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	252	345	882	1,035
Other, including interest on federal funds sold	87	63	310	273
Total interest income	35,957	37,455	107,461	111,014
Interest expense:
Interest on deposits	2,475	2,778	7,409	8,699
Interest on repurchase agreements and other short-term borrowings	205	232	614	729
Interest on advances from Federal Home Loan Bank	6	7	17	20
Interest on long-term debt	283	288	850	877
Total interest expense	2,969	3,305	8,890	10,325
Net interest income	32,988	34,150	98,571	100,689
Provision for loan losses	3,300	2,129	5,380	7,349
Net interest income after provision for loan losses	29,688	32,021	93,191	93,340
Noninterest income:
Service charges on deposit accounts	6,321	6,349	17,739	18,298
Gains on sales of loans, net	303	653	781	2,805
Trust and wealth management income	2,395	2,005	6,703	6,028
Loan related fees	1,128	1,088	2,573	3,532
Bank owned life insurance	523	517	1,473	2,265
Brokerage revenue	505	576	1,709	1,644
Securities losses	(34)	(23)	(145)	(31)
Other noninterest income	865	906	2,210	2,724
Total noninterest income	12,006	12,071	33,043	37,265
Noninterest expense:
Officer salaries and employee benefits	2,584	2,705	8,206	7,891
Other salaries and employee benefits	10,881	10,543	31,950	31,553
Occupancy, net	2,007	1,945	6,108	5,844
Equipment	831	920	2,669	2,886
Data processing	2,017	1,850	5,875	5,438
Bank franchise tax	1,208	1,124	3,625	3,370
Legal fees	558	585	1,912	1,747
Professional fees	491	491	1,331	1,305
FDIC insurance	575	624	1,782	1,863
Other real estate owned provision and expense	707	905	2,948	3,914
Repossession expense	322	284	863	1,182
Other noninterest expense	3,682	3,615	10,711	10,884
Total noninterest expense	25,863	25,591	77,980	77,877
Income before income taxes	15,831	18,501	48,254	52,728
Income taxes	4,907	5,848	14,995	16,313
Net income	10,924	12,653	33,259	36,415
Unrealized holding gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(2,009)	(981)	10,642	(24,904)
Less: Reclassification adjustments for realized losses included in net income	(34)	(23)	(145)	(31)
Tax (benefit) expense	(691)	(336)	3,776	(8,706)
Other comprehensive income (loss), net of tax	(1,284)	(622)	7,011	(16,167)
Comprehensive income	$ 9,640	$ 12,031	$ 40,270	$ 20,248
Basic earnings per share (in dollars per share)	$ 0.63	$ 0.74	$ 1.92	$ 2.13
Diluted earnings per share (in dollars per share)	$ 0.63	$ 0.73	$ 1.91	$ 2.12
Weighted average shares outstanding-basic (in shares)	17,326	17,154	17,317	17,123
Weighted average shares outstanding-diluted (in shares)	17,402	17,257	17,395	17,212
Dividends declared per share (in dollars per share)	$ 0.300	$ 0.291	$ 0.881	$ 0.863