Condensed Consolidated Statements of Income and Comprehensive Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Interest income:
Interest and fees on loans, including loans held for sale	$ 34,880	$ 33,255	$ 68,355	$ 66,579
Interest and dividends on securities
Taxable	2,230	2,065	4,260	4,158
Tax exempt	721	658	1,470	1,350
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	283	252	559	506
Other, including interest on federal funds sold	297	144	535	308
Total interest income	38,411	36,374	75,179	72,901
Interest expense:
Interest on deposits	3,181	2,677	6,122	5,248
Interest on repurchase agreements and other short-term borrowings	411	284	749	548
Interest on advances from Federal Home Loan Bank	165	4	168	48
Interest on long-term debt	414	350	810	674
Total interest expense	4,171	3,315	7,849	6,518
Net interest income	34,240	33,059	67,330	66,383
Provision for loan losses	2,764	1,873	3,993	3,638
Net interest income after provision for loan losses	31,476	31,186	63,337	62,745
Noninterest income:
Service charges on deposit accounts	6,199	6,272	12,159	12,117
Gains on sales of loans, net	251	446	507	762
Trust and wealth management income	2,649	2,396	5,235	4,671
Loan related fees	773	739	1,778	1,350
Bank owned life insurance	526	538	1,050	1,068
Brokerage revenue	423	317	735	680
Securities gains (losses)	18	(4)	10	64
Other noninterest income	1,472	1,065	2,416	2,028
Total noninterest income	12,311	11,769	23,890	22,740
Noninterest expense:
Officer salaries and employee benefits	2,663	2,964	5,927	6,057
Other salaries and employee benefits	11,381	11,358	23,041	22,398
Occupancy, net	1,972	1,966	3,999	4,023
Equipment	748	729	1,534	1,444
Data processing	1,757	1,559	3,546	3,128
Bank franchise tax	1,521	1,400	3,041	2,799
Legal fees	385	502	827	982
Professional fees	551	483	1,047	922
Advertising and marketing	708	580	1,393	1,209
FDIC insurance	315	576	607	1,159
Other real estate owned provision and expense	1,827	468	2,743	1,019
Repossession expense	227	424	428	639
Amortization of limited partnership investments	604	997	1,209	1,532
Other noninterest expense	2,907	3,186	5,868	6,123
Total noninterest expense	27,566	27,192	55,210	53,434
Income before income taxes	16,221	15,763	32,017	32,051
Income taxes	4,680	4,197	9,199	8,883
Net income	11,541	11,566	22,818	23,168
Unrealized holding gains on securities available-for-sale:
Unrealized holding gains arising during the period	1,630	2,321	2,745	8,124
Less: Reclassification adjustments for realized gains (losses) included in net income	18	(4)	10	64
Tax expense	564	814	957	2,821
Other comprehensive income, net of tax	1,048	1,511	1,778	5,239
Comprehensive income	$ 12,589	$ 13,077	$ 24,596	$ 28,407
Basic earnings per share (in dollars per share)	$ 0.65	$ 0.66	$ 1.29	$ 1.32
Diluted earnings per share (in dollars per share)	$ 0.65	$ 0.66	$ 1.29	$ 1.32
Weighted average shares outstanding-basic (in shares)	17,626	17,530	17,621	17,521
Weighted average shares outstanding-diluted (in shares)	17,645	17,542	17,641	17,538
Dividends declared per share (in dollars per share)	$ 0.32	$ 0.31	$ 0.64	$ 0.62