Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Capital Stock [Member]	Retained earnings [Member]	Accumulated other comprehensive income (loss) [Member]	Total
Beginning balance at Dec. 31, 2019	$ 30,848	$ 72,385	$ 3,602	$ 106,835
Balance, shares at Dec. 31, 2019	3,781,500
Net income		7,862		7,862
Other comprehensive (loss) income			4,218	4,218
Issuance of common stock through Employee Stock Purchase Plan	$ 219			219
Issuance of common stock through Employee Stock Purchase Plan, shares	3,885
Issuance of common stock from vested restricted share grants through stock compensation plans	15,395
Stock-based compensation expense	$ 944			944
Issuance of common stock for acquisition	$ 45,408			45,408
Issuance of common stock for acquisition, shares	1,176,970
Cash dividends declared		(3,875)		(3,875)
Ending balance at Sep. 30, 2020	$ 77,419	76,372	7,820	161,611
Balance, shares at Sep. 30, 2020	4,977,750
Beginning balance at Jun. 30, 2020	$ 77,162	72,797	7,201	157,160
Balance, shares at Jun. 30, 2020	4,977,750
Net income		4,977		4,977
Other comprehensive (loss) income			619	619
Stock-based compensation expense	$ 257			257
Cash dividends declared		(1,402)		(1,402)
Ending balance at Sep. 30, 2020	$ 77,419	76,372	7,820	161,611
Balance, shares at Sep. 30, 2020	4,977,750
Beginning balance at Dec. 31, 2020	$ 77,676	80,042	8,952	166,670
Balance, shares at Dec. 31, 2020	4,977,750
Net income		16,222		16,222
Other comprehensive (loss) income			(8,778)	(8,778)
Issuance of common stock through Employee Stock Purchase Plan	$ 270			270
Issuance of common stock through Employee Stock Purchase Plan, shares	4,738
Issuance of common stock from vested restricted share grants through stock compensation plans	13,209
Issuance of common stock through exercise of SSARs, shares	2,000
Stock-based compensation expense	$ 860			860
Issuance of common stock for acquisition	$ 35,056			35,056
Issuance of common stock for acquisition, shares	647,990
Cash dividends declared		(4,731)		(4,731)
Ending balance at Sep. 30, 2021	$ 113,862	91,533	174	205,569
Balance, shares at Sep. 30, 2021	5,645,687
Beginning balance at Jun. 30, 2021	$ 78,473	88,381	5,331	172,185
Balance, shares at Jun. 30, 2021	4,995,713
Net income		4,859		4,859
Other comprehensive (loss) income			(5,157)	(5,157)
Issuance of common stock from vested restricted share grants through stock compensation plans	1,984
Stock-based compensation expense	$ 333			333
Issuance of common stock for acquisition	$ 35,056			35,056
Issuance of common stock for acquisition, shares	647,990
Cash dividends declared		(1,707)		(1,707)
Ending balance at Sep. 30, 2021	$ 113,862	$ 91,533	$ 174	$ 205,569
Balance, shares at Sep. 30, 2021	5,645,687