Other Income (Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Non-Income Tax Refunds and Other Related Credits	$ 398	$ 141	$ 582
Income from Third Party License Fees	978	875	1,063
Foreign Exchange Gains (Losses), Net	172	(1,184)	(1,039)
Gain on Fixed Asset Disposals, Net	50	6	128
Other Nonoperating Income	338	261	329
Other Nonoperating Expense	(126)	(168)	(296)
Other Income (Expense), Net	$ 1,810	$ (69)	$ 767