Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Common Stock [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Capital Surplus [Member]	Capital Surplus [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Retained Earnings [Member]	Retained Earnings [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Accumulated Other Comprehensive Income (Loss), Net of Tax [Member]	Accumulated Other Comprehensive Income (Loss), Net of Tax [Member] Cumulative Effect, Period of Adoption, Adjustment [Member]	Total	Cumulative Effect, Period of Adoption, Adjustment [Member]
Balance at Dec. 31, 2018	$ 88,665	$ 88,665	$ 223,161	$ 223,161	$ 258,935	$ 258,455	$ (6,611)	$ (6,611)	$ 564,150	$ 563,670
Balance (ASU 2016-02 [Member]) at Dec. 31, 2018						(480)		0		(480)
Balance (in shares) at Dec. 31, 2018	17,732,853	17,732,853
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income					14,939				14,939
Other comprehensive income, net of tax							4,837		4,837
Cash dividends declared					(6,378)				(6,378)
Issuance of common stock	$ 95		163						258
Issuance of common stock (in shares)	19,065
Vesting of restricted stock	$ (61)		61						0
Vesting of restricted stock (in shares)	(12,186)
Issuance of restricted stock	$ 140		(140)						0
Issuance of restricted stock (in shares)	27,921
Forfeiture of restricted stock	$ 0		0						0
Forfeiture of restricted stock (in shares)	(59)
Stock-based compensation			181						181
Balance at Mar. 31, 2019	$ 88,839		223,426		267,016		(1,774)		577,507
Balance (in shares) at Mar. 31, 2019	17,767,594
Balance at Dec. 31, 2019	$ 88,966	$ 88,966	224,907	$ 224,907	296,760	294,394	4,253	$ 4,253	$ 614,886	612,520
Balance (ASU 2016-13 [Member]) at Dec. 31, 2019						$ (2,366)				$ (2,366)
Balance (in shares) at Dec. 31, 2019	17,793,165	17,793,165							17,793,165
Increase (Decrease) in Stockholders' Equity [Roll forward]
Net income					6,579				$ 6,579
Other comprehensive income, net of tax							1,233		1,233
Cash dividends declared					(6,750)				(6,750)
Issuance of common stock	$ 110		122						232
Issuance of common stock (in shares)	21,953
Repurchase of common stock	$ (164)		(935)						(1,099)
Repurchase of common stock (in shares)	(32,664)
Vesting of restricted stock	$ (84)		84						0
Vesting of restricted stock (in shares)	(16,724)
Issuance of restricted stock	$ 108		(108)						0
Issuance of restricted stock (in shares)	21,544
Stock-based compensation			207						207
Balance at Mar. 31, 2020	$ 88,936		$ 224,277		$ 294,223		$ 5,486		$ 612,922
Balance (in shares) at Mar. 31, 2020	17,787,274								17,787,274