Supplemental Balance Sheet Information - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 358,226	$ 332,136
Less – Accumulated depreciation	(201,479)	(187,303)
Property, Plant and Equipment, Net	156,747	144,833
Depreciation	30,400	30,600	$ 30,200
Land and land improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	10,414	10,348
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 65,505	55,981
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	5 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 189,849	173,898
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	4 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 32,386	30,048
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years
Autos and trucks
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 50,128	50,200
Autos and trucks | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	3 years
Autos and trucks | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	10 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 9,944	$ 11,661