Other Income (Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income (Expense) [Abstract]
Foreign Currency Transaction Loss (Gain), before tax	$ 592	$ 293	$ 65
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property	(946)	0	0
Other Nonoperating Expense (Income)	$ (354)	$ 293	$ 65