Derivative Financial Instruments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Derivative [Line Items]
Interest rate cash flow hedge gain (loss) to be reclassified to interest expense during the next 12 months	$ (200)		$ (200)
Interest Expense | Interest Rate Swap
Derivative [Line Items]
Amount of loss reclassified from accumulated OCI into Interest Expense (effective portion)	$ (43)	$ (42)	$ (127)	$ (126)