Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment
Property, Plant and Equipment	$ (382,768)	$ (298,500)
Accumulated Depreciation, Property, Plant and Equipment prior to Assets Held for Sale	202,750	186,403
Property, Plant and Equipment, Net	180,018	112,097
Depreciation expense	26,199	17,891	$ 16,550
Land
Property, Plant and Equipment
Property, Plant and Equipment	(18,152)	(6,328)
Buildings and improvements
Property, Plant and Equipment
Property, Plant and Equipment	(96,230)	(58,577)
Machinery and manufacturing equipment
Property, Plant and Equipment
Property, Plant and Equipment	(151,645)	(116,221)
Office equipment
Property, Plant and Equipment
Property, Plant and Equipment	(107,312)	(89,838)
Work in progress
Property, Plant and Equipment
Property, Plant and Equipment	$ (9,429)	$ (27,536)