Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock Member	Additional Paid In Capital Member	Retained Earnings Member	Accumulated Other Comprehensive Income Member	Treasury Stock Member
Balance, shares at Dec. 31, 2018		3,643,868
Balance, Beg at Dec. 31, 2018	$ 89,055	$ 39	$ 3,779	$ 95,635	$ (3,763)	$ (6,635)
Net earnings	4,850	0	0	4,850	0	0
Other Comprehensive Income (Loss), Net Of Tax	4,443	0	0	0	4,443	0
Cash dividends paid	1,791	0	0	1,791	0	0
Treasury Stock, acquired	(2,497)	$ 0	0	0	0	(2,497)
Treasury Stock, acquired shares		72,205
Sale of treasury stock	5	$ 0	4	0	0	1
Treasury shares sold		165
Balance, End at Jun. 30, 2019	94,065	$ 39	3,783	98,694	680	(9,131)
Balance, shares at Jun. 30, 2019		3,571,828
Balance, shares at Mar. 31, 2019		3,581,485
Balance, Beg at Mar. 31, 2019	90,949	$ 39	3,783	97,280	(1,371)	(8,782)
Net earnings	2,307	0	0	2,307	0	0
Other Comprehensive Income (Loss), Net Of Tax	2,051	0	0	0	2,051	0
Cash dividends paid	893	0	0	893	0	0
Treasury Stock, acquired	(350)	$ 0	0	0	0	(350)
Treasury Stock, acquired shares		9,687
Sale of treasury stock	1	$ 0	0	0	0	1
Treasury shares sold		30
Balance, End at Jun. 30, 2019	94,065	$ 39	3,783	98,694	680	(9,131)
Balance, shares at Jun. 30, 2019		3,571,828
Balance, shares at Dec. 31, 2019		3,566,146
Balance, Beg at Dec. 31, 2019	98,328	$ 39	3,784	101,801	2,059	(9,355)
Net earnings	3,462	0	0	3,462	0	0
Other Comprehensive Income (Loss), Net Of Tax	5,327	0	0	0	5,327	0
Cash dividends paid	1,819	0	0	1,819	0	0
Sale of treasury stock	1	$ 0	1	0	0	0
Treasury shares sold		30
Balance, End at Jun. 30, 2020	105,299	$ 39	3,785	103,444	7,386	(9,355)
Balance, shares at Jun. 30, 2020		3,566,176
Balance, shares at Mar. 31, 2020		3,566,146
Balance, Beg at Mar. 31, 2020	103,563	$ 39	3,784	102,692	6,403	(9,355)
Net earnings	1,661	0	0	1,661	0	0
Other Comprehensive Income (Loss), Net Of Tax	983	0	0	0	983	0
Cash dividends paid	(909)	0	0	(909)	0	0
Sale of treasury stock	1	$ 0	1	0	0	0
Treasury shares sold		30
Balance, End at Jun. 30, 2020	$ 105,299	$ 39	$ 3,785	$ 103,444	$ 7,386	$ (9,355)
Balance, shares at Jun. 30, 2020		3,566,176