Condensed Consolidated Statements of Shareholders’ Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock and Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
BALANCE at Dec. 31, 2018	$ 68,387	$ 83,188	$ 151,575
BALANCE (in Shares) at Dec. 31, 2018	7,368
Net income		3,605	3,605
Dividends paid on common stock		(886)	(886)
Stock issued and options exercised including related tax benefits	$ 294		294
Stock issued and options exercised including related tax benefits (in Shares)	17
Stock compensation expense	$ 168		168
Stock compensation expense (in Shares)	6
BALANCE at Mar. 31, 2019	$ 68,849	85,907	154,756
BALANCE (in Shares) at Mar. 31, 2019	7,391
BALANCE at Dec. 31, 2018	$ 68,387	83,188	151,575
BALANCE (in Shares) at Dec. 31, 2018	7,368
Net income			12,378
BALANCE at Sep. 30, 2019	$ 69,273	92,608	161,881
BALANCE (in Shares) at Sep. 30, 2019	7,403
BALANCE at Mar. 31, 2019	$ 68,849	85,907	154,756
BALANCE (in Shares) at Mar. 31, 2019	7,391
Net income		3,156	3,156
Dividends paid on common stock		(1,035)	(1,035)
Stock compensation expense	$ 164		164
Stock compensation expense (in Shares)	3
BALANCE at Jun. 30, 2019	$ 69,013	88,028	157,041
BALANCE (in Shares) at Jun. 30, 2019	7,394
Net income		5,616	5,616
Dividends paid on common stock		(1,036)	(1,036)
Stock issued and options exercised including related tax benefits	$ 96		96
Stock issued and options exercised including related tax benefits (in Shares)	7
Stock compensation expense	$ 164		164
Stock compensation expense (in Shares)	2
BALANCE at Sep. 30, 2019	$ 69,273	92,608	161,881
BALANCE (in Shares) at Sep. 30, 2019	7,403
BALANCE at Dec. 31, 2019	$ 67,993	96,663	164,656
BALANCE (in Shares) at Dec. 31, 2019	7,355
Net income		1,188	1,188
Dividends paid on common stock		(1,030)	(1,030)
Repurchase of common stock	$ (1,000)		(1,000)
Repurchase of common stock (in Shares)	(50)
Stock compensation expense	$ 202		202
Stock compensation expense (in Shares)	4
BALANCE at Mar. 31, 2020	$ 67,195	96,821	164,016
BALANCE (in Shares) at Mar. 31, 2020	7,309
BALANCE at Dec. 31, 2019	$ 67,993	96,663	164,656
BALANCE (in Shares) at Dec. 31, 2019	7,355
Net income			11,241
BALANCE at Sep. 30, 2020	$ 66,604	104,828	171,432
BALANCE (in Shares) at Sep. 30, 2020	7,276
BALANCE at Mar. 31, 2020	$ 67,195	96,821	164,016
BALANCE (in Shares) at Mar. 31, 2020	7,309
Net income		2,442	2,442
Dividends paid on common stock		(1,023)	(1,023)
Stock compensation expense	$ 194		194
Stock compensation expense (in Shares)	3
BALANCE at Jun. 30, 2020	$ 67,389	98,240	165,629
BALANCE (in Shares) at Jun. 30, 2020	7,312
Net income		7,611	7,611
Dividends paid on common stock		(1,023)	(1,023)
Repurchase of common stock	$ (1,004)		(1,004)
Repurchase of common stock (in Shares)	(41)
Stock issued and options exercised including related tax benefits	$ 29		29
Stock issued and options exercised including related tax benefits (in Shares)	2
Stock compensation expense	$ 190		190
Stock compensation expense (in Shares)	3
BALANCE at Sep. 30, 2020	$ 66,604	$ 104,828	$ 171,432
BALANCE (in Shares) at Sep. 30, 2020	7,276