CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balances at Dec. 31, 2016	$ 127	$ 64,201	$ 90,964	$ (993)	$ 154,299
Net income			5,152		5,152
Other comprehensive income (loss)				1,167	1,167
Stock-based compensation		590			590
Cash dividends declared			(1,268)		(1,268)
Balances at Jun. 30, 2017	127	64,791	94,848	174	159,940
Balances at Dec. 31, 2017	127	65,256	99,662	(1,309)	163,736
Net income			8,449		8,449
Other comprehensive income (loss)				(2,464)	(2,464)
Stock-based compensation		306			306
Cash dividends declared			(1,912)		(1,912)
Balances at Jun. 30, 2018	$ 127	$ 65,562	106,193	(3,767)	$ 168,115
Cumulative effect adjustment			$ (6)	$ 6