Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Apr. 01, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 886,433	$ 863,893
Accumulated depreciation	(301,208)	(290,334)
Property, plant and equipment, net	585,225	573,559
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	26,883	26,790
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	177,651	176,077
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 681,899	$ 661,026