Derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Apr. 13, 2017	Aug. 24, 2015	Dec. 30, 2014	Oct. 15, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Notional Amount of Interest Rate Cash Flow Hedge Derivatives					$ 25,000	$ 25,000	$ 25,000	$ 25,000
Interest expense on derivatives	$ 173	$ 95	$ 326	$ 326