Property Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Property, Plant and Equipment [Line Items]
Land	$ 7,894	$ 7,475
Buildings and Improvements, Gross	111,740	106,838
Machinery and Equipment, Gross	263,858	252,884
Property, Plant and Equipment, Gross	383,492	367,197
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	(240,281)	(218,183)
Property, Plant and Equipment, Net	$ (143,211)	$ (149,014)	$ (138,824)