Other Income (Expense) - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Other Income And Expenses [Abstract]
Income From Third Party License Fees	$ 269	$ 272
Foreign Exchange (Losses) Gains, Net	(214)	312
Gain (loss) on Fixed Asset Disposals, Net	15	5
Non-Income Tax Refunds and Other Related Credits	294	21
Pension and Post Retirement Benefit Costs Non-service Components	(566)	(604)
Other Nonoperating Income	131	124
Other Nonoperating Expense	(34)	(28)
Other (Expense) Income, Net	$ (105)	$ 102