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
Comprehensive income:
Change in Accounting policy for equity securities			$ (1)	$ 1		$ 0
Balance at Dec. 31, 2017	$ 3,870	$ 51,108	89,982	(3,398)	$ (12,551)	129,011
Balance (in shares) at Dec. 31, 2017	3,869,939
Comprehensive income:
Net income			13,519			13,519
Net other comprehensive income (loss)				(2,684)		(2,684)
Stock dividend	$ 34	2,108				0
Stock dividend			(2,142)
Stock dividend (in shares)	34,272
Issuance of Common stock						0
Issuance of Common stock (in shares)	1
Purchase of treasury stock					(791)	(791)
Restricted stock, executive and Board of Director awards		(306)			13	(293)
Restricted stock vesting		212				212
Cash dividend reinvestment paid from treasury stock		0	(30)		30	0
Cash dividends			(4,574)			(4,574)
Balance at Sep. 30, 2018	$ 3,904	53,122	96,754	(6,081)	(13,299)	134,400
Balance (in shares) at Sep. 30, 2018	3,904,212
Balance at Jun. 30, 2018	$ 3,904	53,098	93,717	(5,357)	(13,081)	132,281
Balance (in shares) at Jun. 30, 2018	3,904,212
Comprehensive income:
Net income			4,581			4,581
Net other comprehensive income (loss)				(724)		(724)
Purchase of treasury stock					(248)	(248)
Restricted stock vesting		24				24
Cash dividend reinvestment paid from treasury stock		0	(30)		30	0
Cash dividends			(1,514)			(1,514)
Balance at Sep. 30, 2018	$ 3,904	53,122	96,754	(6,081)	(13,299)	134,400
Balance (in shares) at Sep. 30, 2018	3,904,212
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				0
Stock dividend			(2,102)
Stock dividend (in shares)	34,456
Purchase of treasury stock					(1,236)	(1,236)
Restricted stock, executive and Board of Director awards		(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