Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2017	$ 8,698	$ 185,893	$ (9,695)	$ 184,896
Net income		11,588		11,588
Other comprehensive income (loss), net of tax			(4,291)	(4,291)
Dividends		(4,036)		(4,036)
Balance at Sep. 30, 2018	8,698	193,445	(13,986)	188,157
Balance at Jun. 30, 2018	8,698	189,194	(12,041)	185,851
Net income		4,251		4,251
Other comprehensive income (loss), net of tax			(1,945)	(1,945)
Balance at Sep. 30, 2018	8,698	193,445	(13,986)	188,157
Balance at Dec. 31, 2018	8,698	193,625	(12,085)	190,238
Net income		12,689		12,689
Other comprehensive income (loss), net of tax			7,945	7,945
Common stock repurchased	(586)	(17,939)		(18,525)
Dividends		(4,359)		(4,359)
Balance at Sep. 30, 2019	8,112	184,016	(4,140)	187,988
Balance at Jun. 30, 2019	8,132	180,272	(4,556)	183,848
Net income		4,252		4,252
Other comprehensive income (loss), net of tax			416	416
Common stock repurchased	(20)	(508)		(528)
Balance at Sep. 30, 2019	$ 8,112	$ 184,016	$ (4,140)	$ 187,988