Other Real Estate Owned (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Other Real Estate [Roll Forward]
Balance beginning of period	$ 2,694	$ 5,852
Real estate acquired from borrowers	1,145	2,500
Valuation allowance		(200)
Properties sold	(2,445)	(5,458)
Balance end of period	$ 1,394	$ 2,694