Condensed Consolidated Statements of Income and Comprehensive Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest income:
Interest and fees on loans, including loans held for sale	$ 39,420	$ 36,288	$ 113,788	$ 104,643
Interest and dividends on securities
Taxable	2,422	2,198	7,314	6,458
Tax exempt	699	741	2,102	2,211
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	341	308	1,002	867
Interest on Federal Reserve Bank deposits	659	240	1,811	695
Other, including interest on federal funds sold	66	69	195	149
Total interest income	43,607	39,844	126,212	115,023
Interest expense:
Interest on deposits	6,051	3,754	16,508	9,876
Interest on repurchase agreements	818	466	2,176	1,215
Interest on advances from Federal Home Loan Bank	3	226	7	394
Interest on long-term debt	599	428	1,646	1,238
Total interest expense	7,471	4,874	20,337	12,723
Net interest income	36,136	34,970	105,875	102,300
Provision for loan losses	1,543	666	4,418	4,659
Net interest income after provision for loan losses	34,593	34,304	101,457	97,641
Noninterest income:
Service charges on deposit accounts	6,671	6,499	19,372	18,658
Gains on sales of loans, net	319	390	902	897
Trust and wealth management income	2,836	2,534	8,650	7,769
Loan related fees	1,022	792	3,085	2,570
Bank owned life insurance	555	583	3,112	1,633
Brokerage revenue	331	297	1,054	1,032
Securities gains (losses)	(2)	48	(288)	58
Other noninterest income	931	1,059	3,826	3,475
Total noninterest income	12,663	12,202	39,713	36,092
Noninterest expense:
Officer salaries and employee benefits	3,475	2,933	9,909	8,860
Other salaries and employee benefits	11,789	11,146	36,396	34,187
Occupancy, net	2,019	2,043	6,178	6,042
Equipment	725	741	2,169	2,275
Data processing	1,695	1,772	4,965	5,318
Bank franchise tax	1,618	1,205	4,896	4,246
Legal fees	373	429	1,275	1,256
Professional fees	507	478	1,504	1,525
Advertising and marketing	744	705	2,352	2,098
FDIC insurance	314	316	907	923
Other real estate owned provision and expense	1,094	1,313	3,348	4,056
Repossession expense	246	269	959	697
Amortization of limited partnership investments	609	605	1,825	1,814
Other noninterest expense	2,898	2,977	12,543	8,845
Total noninterest expense	28,106	26,932	89,226	82,142
Income before income taxes	19,150	19,574	51,944	51,591
Income taxes	3,044	5,811	8,425	15,010
Net income	16,106	13,763	43,519	36,581
Unrealized holding gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(2,521)	(522)	(9,830)	2,223
Less: Reclassification adjustments for realized gains (losses) included in net income	(2)	48	149	58
Tax expense (benefit)	(529)	(199)	(2,096)	758
Unrealized holding gains (losses) on securities available-for-sale, net of tax	(1,990)	(371)	(7,883)	1,407
Implementation of ASU 2016-01	0	0	507	0
Other comprehensive income (loss), net of tax	(1,990)	(371)	(7,376)	1,407
Comprehensive income	$ 14,116	$ 13,392	$ 36,143	$ 37,988
Basic earnings per share (in dollars per share)	$ 0.91	$ 0.78	$ 2.46	$ 2.08
Diluted earnings per share (in dollars per share)	$ 0.91	$ 0.78	$ 2.46	$ 2.07
Weighted average shares outstanding-basic (in shares)	17,691	17,633	17,683	17,625
Weighted average shares outstanding-diluted (in shares)	17,710	17,653	17,700	17,645
Dividends declared per share (in dollars per share)	$ 0.36	$ 0.33	$ 1.02	$ 0.97