CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' 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 Dec. 31, 2018	$ 3,904	$ 53,099	$ 99,727	$ (3,921)	$ (13,580)	$ 139,229
Balance (in shares) at Dec. 31, 2018	3,904,212
Comprehensive income:
Net income			14,447			14,447
Net other comprehensive income (loss)				3,632		3,632
Stock dividend	$ 35	2,067
Stock dividend			(2,102)			0
Stock dividend (in shares)	34,456
Purchase of treasury stock					(1,236)	(1,236)
Restricted stock, executive, Board of Director awards and ESOP		(300)			415	115
Restricted stock vesting		221				221
Forfeited restricted stock		9			(9)	0
Cash dividends			(4,730)			(4,730)
Balance at Sep. 30, 2019	$ 3,939	55,096	107,342	(289)	(14,410)	151,678
Balance (in shares) at Sep. 30, 2019	3,938,668
Balance at Jun. 30, 2019	$ 3,939	55,096	103,733	(337)	(14,410)	148,021
Balance (in shares) at Jun. 30, 2019	3,938,668
Comprehensive income:
Net income			5,196			5,196
Net other comprehensive income (loss)				48		48
Cash dividends			(1,587)			(1,587)
Balance at Sep. 30, 2019	$ 3,939	55,096	107,342	(289)	(14,410)	151,678
Balance (in shares) at Sep. 30, 2019	3,938,668
Balance at Dec. 31, 2019	$ 3,939	55,089	110,800	(629)	(14,425)	154,774
Balance (in shares) at Dec. 31, 2019	3,938,668
Comprehensive income:
Net income			17,876			17,876
Net other comprehensive income (loss)				3,494		3,494
Stock dividend	$ 38	1,878
Stock dividend			(1,916)			0
Stock dividend (in shares)	38,318
Issuance of Common stock	$ 373	18,854				19,227
Issuance of Common stock (in shares)	373,356
Purchase of treasury stock					(2,120)	(2,120)
Restricted stock, executive, Board of Director awards and ESOP		(236)			491	255
Restricted stock vesting		281				281
Cash dividend reinvestment paid from treasury stock		1	0		820	821
Cash dividends			(5,557)			(5,557)
Balance at Sep. 30, 2020	$ 4,350	75,867	121,203	2,865	(15,234)	189,051
Balance (in shares) at Sep. 30, 2020	4,350,342
Balance at Jun. 30, 2020	$ 4,350	75,863	115,000	2,907	(15,025)	183,095
Balance (in shares) at Jun. 30, 2020	4,350,342
Comprehensive income:
Net income			8,007			8,007
Net other comprehensive income (loss)				(42)		(42)
Purchase of treasury stock					(618)	(618)
Restricted stock, executive, Board of Director awards and ESOP		(3)			153	150
Cash dividend reinvestment paid from treasury stock		7			256	263
Cash dividends			(1,804)			(1,804)
Balance at Sep. 30, 2020	$ 4,350	$ 75,867	$ 121,203	$ 2,865	$ (15,234)	$ 189,051
Balance (in shares) at Sep. 30, 2020	4,350,342