CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balance at January 1, 2020 at Dec. 31, 2019	$ 5,447	$ 51,165	$ 86,751	$ 528	$ (15,712)	$ 128,179
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	3,265	0	0	3,265
Other comprehensive income (loss), net	0	0	0	2,387	0	2,387
Cash dividends	0	0	(2,010)	0	0	(2,010)
Balance at June 30, 2020 at Jun. 30, 2020	5,447	51,165	88,006	2,915	(15,712)	131,821
Balance at January 1, 2020 at Mar. 31, 2020	5,447	51,165	86,748	2,848	(15,712)	130,496
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	2,263	0	0	2,263
Other comprehensive income (loss), net	0	0	0	67	0	67
Cash dividends	0	0	(1,005)	0	0	(1,005)
Balance at June 30, 2020 at Jun. 30, 2020	5,447	51,165	88,006	2,915	(15,712)	131,821
Balance at January 1, 2020 at Dec. 31, 2020	5,447	51,165	92,988	2,436	(15,712)	136,324
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	6,392	0	0	6,392
Other comprehensive income (loss), net	0	0	0	(1,281)	0	(1,281)
Cash dividends	0	0	(2,011)	0	0	(2,011)
Balance at June 30, 2020 at Jun. 30, 2021	5,447	51,165	97,369	1,155	(15,712)	139,424
Balance at January 1, 2020 at Mar. 31, 2021	5,447	51,165	95,514	1,326	(15,712)	137,740
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	0	0	2,861	0	0	2,861
Other comprehensive income (loss), net	0	0	0	(171)	0	(171)
Cash dividends	0	0	(1,006)	0	0	(1,006)
Balance at June 30, 2020 at Jun. 30, 2021	$ 5,447	$ 51,165	$ 97,369	$ 1,155	$ (15,712)	$ 139,424