Unaudited Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balances at at Dec. 31, 2016	$ 6,917	$ 85,133	$ 23,839	$ (2,330)	$ 113,559
Comprehensive Income:
Net Income			5,710		5,710
Other Comprehensive Income (Loss)				1,940	1,940
Cash Dividends Declared			(1,178)		(1,178)
Stock Based Compensation Cost	18	43			61
Stock Repurchase	(2)	(40)	9		(33)
Balances at at Dec. 31, 2016	6,917	85,133	23,839	(2,330)	113,559
Balances at at Sep. 30, 2017	6,933	85,136	28,380	(390)	120,059
Balances at at Dec. 31, 2017	10,232	144,172	27,175	(1,644)	179,935
Comprehensive Income:
Net Income			10,646		10,646
Other Comprehensive Income (Loss)				(3,734)	(3,734)
Cash Dividends Declared			(2,358)		(2,358)
Stock Based Compensation Cost	49	851			900
Balances at at Dec. 31, 2017	10,232	144,172	27,175	(1,644)	179,935
Comprehensive Income:
Stock Issuance	1,257	26,404			27,661
Surrendered Shares of Stock Based Compensation	(4)	(82)	(3)		(89)
Balances at at Sep. 30, 2018	$ 11,534	$ 171,345	$ 35,460	$ (5,378)	$ 212,961