Consolidated Statements of Shareholders' Equity (unaudited) - USD ($) $ in Thousands	Total		Common Stock and Related Surplus [Member]	Unearned ESOP Shares [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Cumulative Effect, Period of Adoption, Adjustment [Member] Retained Earnings [Member]
Beginning Balance at Dec. 31, 2018	$ 219,830		$ 80,431	$ (939)	$ 141,354	$ (1,016)
Comprehensive income:
Net income	15,656				15,656
Other comprehensive income	3,237					3,237
Stock Issued During Period, Value, Stock Options Exercised	7		7
Share-based compensation expense	281		281
Stock Issued During Period, Value, Employee Stock Ownership Plan	253		142	111
Stock Repurchased and Retired During Period, Value	(8,952)		(8,952)
Stock Issued During Period, Value, Acquisitions	8,918		8,918
Stock Issued During Period, Value, Dividend Reinvestment Plan	119		119
Common stock cash dividends declared	(3,648)				(3,648)
Ending Balance at Jun. 30, 2019	235,701		80,946	(828)	153,362	2,221
Beginning Balance at Mar. 31, 2019	233,630		86,729	(884)	146,671	1,114
Comprehensive income:
Net income	8,564				8,564
Other comprehensive income	1,107					1,107
Stock Issued During Period, Value, Stock Options Exercised	7		7
Share-based compensation expense	149		149
Stock Issued During Period, Value, Employee Stock Ownership Plan	133		77	56
Stock Repurchased and Retired During Period, Value	(6,076)		(6,076)
Stock Issued During Period, Value, Dividend Reinvestment Plan	60		60
Common stock cash dividends declared	(1,873)				(1,873)
Ending Balance at Jun. 30, 2019	235,701		80,946	(828)	153,362	2,221
Beginning Balance at Dec. 31, 2019	247,764	[1]	80,084	(714)	165,859	2,535
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect on Retained Earnings, Net of Tax (Deprecated 2020-01-31)	(6,756)
Cumulative Effect on Retained Earnings, Net of Tax (Deprecated 2020-01-31) | Accounting Standards Update 2016-13 [Member]							$ (6,756)
Comprehensive income:
Net income	11,455				11,455
Other comprehensive income	787					787
Stock Issued During Period, Value, Restricted Stock Award, Gross	0		0
Share-based compensation expense	323		323
Stock Issued During Period, Value, Employee Stock Ownership Plan	222		101	121
Stock Repurchased and Retired During Period, Value	(1,444)		(1,444)
Stock Issued During Period, Value, Acquisitions	15,354		15,354
Stock Issued During Period, Value, Dividend Reinvestment Plan	121		121
Common stock cash dividends declared	(4,395)				(4,395)
Ending Balance at Jun. 30, 2020	263,431		94,539	(593)	166,163	3,322
Beginning Balance at Mar. 31, 2020	256,025		94,439	(653)	161,408	831
Comprehensive income:
Net income	6,949				6,949
Other comprehensive income	2,491					2,491
Stock Issued During Period, Value, Restricted Stock Award, Gross	0		0
Share-based compensation expense	161		161
Stock Issued During Period, Value, Employee Stock Ownership Plan	91		31	60
Stock Repurchased and Retired During Period, Value	(162)		(162)
Stock Issued During Period, Value, Dividend Reinvestment Plan	70		70
Common stock cash dividends declared	(2,194)				(2,194)
Ending Balance at Jun. 30, 2020	$ 263,431		$ 94,539	$ (593)	$ 166,163	$ 3,322

[1] Derived from audited consolidated financial statements