Condensed Consolidated Statements of Income and Comprehensive Income (unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest income:
Interest and fees on loans, including loans held for sale	$ 36,577	$ 33,475
Interest and dividends on securities
Taxable	2,470	2,030
Tax exempt	697	749
Interest and dividends on Federal Reserve Bank and Federal Home Loan Bank stock	333	276
Other, including interest on federal funds sold	503	238
Total interest income	40,580	36,768
Interest expense:
Interest on deposits	4,872	2,941
Interest on repurchase agreements	635	338
Interest on advances from Federal Home Loan Bank	2	3
Interest on long-term debt	480	396
Total interest expense	5,989	3,678
Net interest income	34,591	33,090
Provision for loan losses	946	1,229
Net interest income after provision for loan losses	33,645	31,861
Noninterest income:
Service charges on deposit accounts	6,221	5,960
Gains on sales of loans, net	279	256
Trust and wealth management income	2,958	2,586
Loan related fees	1,144	1,005
Bank owned life insurance	1,764	524
Brokerage revenue	283	312
Securities losses	(288)	(8)
Other noninterest income	949	944
Total noninterest income	13,310	11,579
Noninterest expense:
Officer salaries and employee benefits	3,214	3,264
Other salaries and employee benefits	12,405	11,660
Occupancy, net	2,116	2,027
Equipment	717	786
Data processing	1,636	1,789
Bank franchise tax	1,701	1,520
Legal fees	474	442
Professional fees	502	496
Advertising and marketing	732	685
FDIC insurance	314	292
Other real estate owned provision and expense	939	916
Repossession expense	409	201
Amortization of limited partnership investments	500	605
Other noninterest expense	3,022	2,961
Total noninterest expense	28,681	27,644
Income before income taxes	18,274	15,796
Income taxes	2,460	4,519
Net income	15,814	11,277
Unrealized holding gains (losses) on securities available-for-sale:
Unrealized holding gains (losses) arising during the period	(5,498)	1,115
Less: Reclassification adjustments for realized gains (losses) included in net income	149	(8)
Tax expense (benefit)	(1,186)	393
Unrealized holding gain (loss) on securities available-for-sale, net of tax	(4,461)	730
Implementation of ASU 2016-01	507	0
Other comprehensive income (loss), net of tax	(3,954)	730
Comprehensive income	$ 11,860	$ 12,007
Basic earnings per share (in dollars per share)	$ 0.89	$ 0.64
Diluted earnings per share (in dollars per share)	$ 0.89	$ 0.64
Weighted average shares outstanding-basic (in shares)	17,671	17,615
Weighted average shares outstanding-diluted (in shares)	17,687	17,638
Dividends declared per share (in dollars per share)	$ 0.33	$ 0.32