Other Long-Term Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Liabilities, Other than Long-term Debt, Noncurrent [Abstract]
Deferred income taxes	$ 1,420	$ 1,282
Pension and post retirement liabilities	8,150	7,689
Restructuring Reserve, Noncurrent	210	1,618
Liability for Uncertain Tax Positions, Noncurrent	1,974	1,974
Environmental liabilities	1,100	1,100
Other liabilities	1,805	1,906
Other Liabilities, Noncurrent	$ 14,659	$ 15,569