Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance
Beginning balance at Dec. 31, 2018	$ 210,296	$ (53)	$ 210,243	$ 174,366	$ 174,366	$ 37,577	$ (53)	$ 37,524	$ (1,647)	$ (1,647)
Beginning balance (in shares) at Dec. 31, 2018				15,977,754	15,977,754
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,165					13,165
Other comprehensive income, net of tax	1,985								1,985
Repurchase of common stock (in shares)				(57,551)
Repurchase of common stock	(974)			$ (974)
Share-based compensation expense	323			$ 323
Stock options exercised (in shares)				60,452
Stock options exercised	420			$ 420
Cash dividends declared on common stock	(1,762)					(1,762)
Ending balance at Jun. 30, 2019	223,400			$ 174,135		48,927			338
Ending balance (in shares) at Jun. 30, 2019				15,980,655
Beginning balance at Mar. 31, 2019	217,211			$ 174,743		43,288			(820)
Beginning balance (in shares) at Mar. 31, 2019				16,011,151
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	6,601					6,601
Other comprehensive income, net of tax	1,158								1,158
Share-based compensation expense	162			$ 162
Stock options exercised (in shares)				27,055
Stock options exercised	204			$ 204
Cash dividends declared on common stock	(962)					(962)
Ending balance at Jun. 30, 2019	223,400			$ 174,135		48,927			338
Ending balance (in shares) at Jun. 30, 2019				15,980,655
Beginning balance at Dec. 31, 2019	$ 226,834			$ 169,221		57,670			(57)
Beginning balance (in shares) at Dec. 31, 2019	15,707,016			15,707,016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 6,939					6,939
Other comprehensive income, net of tax	1,999								1,999
Issuance of restricted stock (in shares)				1,000
Repurchase of common stock (in shares)				(428,474)
Repurchase of common stock	(6,487)			$ (6,487)
Share-based compensation expense	$ 392			$ 392
Stock options exercised (in shares)	98,393			98,393
Stock options exercised	$ 633			$ 633
Cash dividends declared on common stock	(3,077)					(3,077)
Ending balance at Jun. 30, 2020	$ 227,233			$ 163,759		61,532			1,942
Ending balance (in shares) at Jun. 30, 2020	15,377,935			15,377,935
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201602Member
Beginning balance at Mar. 31, 2020	$ 224,125			$ 163,532		59,702			891
Beginning balance (in shares) at Mar. 31, 2020				15,370,086
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,367					3,367
Other comprehensive income, net of tax	1,051								1,051
Repurchase of common stock (in shares)				(57,551)
Repurchase of common stock	(974)			$ (974)
Share-based compensation expense	$ 198			$ 198
Stock options exercised (in shares)	7,849			7,849
Stock options exercised	$ 29			$ 29
Cash dividends declared on common stock	(1,537)					(1,537)
Ending balance at Jun. 30, 2020	$ 227,233			$ 163,759		$ 61,532			$ 1,942
Ending balance (in shares) at Jun. 30, 2020	15,377,935			15,377,935