Unaudited Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2019	$ 101	$ 92,391	$ 7,634
Balance (in shares) at Dec. 31, 2019	10,057,506
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			10,087	$ 10,087
Shares issued for restricted stock units (in shares)	0
Common stock acquired and canceled (in shares)	(831,254)			(831,254)
Common stock acquired and canceled	$ (9)		(7,107)
Stock-based compensation expense		371
Cash dividends declared ($0.11 and $0.10 per share for the three months ended June 30, 2021 and 2020, respectively; $0.22 and $0.20 per share for the six months ended June 30, 2021 and 2020, respectively)			(1,849)
Balance at Jun. 30, 2020	$ 92	92,762	8,765	$ 101,619
Balance (in shares) at Jun. 30, 2020	9,226,252
Balance at Mar. 31, 2020	$ 93	92,571	4,952
Balance (in shares) at Mar. 31, 2020	9,264,412
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			5,036	5,036
Shares issued for restricted stock units (in shares)	0
Common stock acquired and canceled (in shares)	(38,160)
Common stock acquired and canceled	$ (1)		(300)
Stock-based compensation expense		191
Cash dividends declared ($0.11 and $0.10 per share for the three months ended June 30, 2021 and 2020, respectively; $0.22 and $0.20 per share for the six months ended June 30, 2021 and 2020, respectively)			(923)
Balance at Jun. 30, 2020	$ 92	92,762	8,765	101,619
Balance (in shares) at Jun. 30, 2020	9,226,252
Balance at Dec. 31, 2020	$ 90	93,162	14,067	107,319
Balance (in shares) at Dec. 31, 2020	9,044,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			11,209	$ 11,209
Shares issued for restricted stock units (in shares)	5,841
Common stock acquired and canceled (in shares)	0			0
Common stock acquired and canceled	$ 0		0
Stock-based compensation expense		473
Cash dividends declared ($0.11 and $0.10 per share for the three months ended June 30, 2021 and 2020, respectively; $0.22 and $0.20 per share for the six months ended June 30, 2021 and 2020, respectively)			(1,990)
Balance at Jun. 30, 2021	$ 90	93,635	23,286	$ 117,011
Balance (in shares) at Jun. 30, 2021	9,050,606
Balance at Mar. 31, 2021	$ 90	93,464	18,176
Balance (in shares) at Mar. 31, 2021	9,049,256
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income			6,105	6,105
Shares issued for restricted stock units (in shares)	1,350
Common stock acquired and canceled (in shares)	0
Common stock acquired and canceled	$ 0		0
Stock-based compensation expense		171
Cash dividends declared ($0.11 and $0.10 per share for the three months ended June 30, 2021 and 2020, respectively; $0.22 and $0.20 per share for the six months ended June 30, 2021 and 2020, respectively)			(995)
Balance at Jun. 30, 2021	$ 90	$ 93,635	$ 23,286	$ 117,011
Balance (in shares) at Jun. 30, 2021	9,050,606