Property Plant and Equipment, Net (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	$ 402,887	$ 378,234
Less accumulated depreciation	(226,366)	(202,648)
Property, plant and equipment, net	176,521	175,586
Depreciation expense	27,500	24,100	$ 23,800
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	14,921	14,115
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	97,265	93,465
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	20,068	18,430
Machinery, office furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	249,068	242,147
Construction in process
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	21,565	10,077
ERP systems
Property, Plant and Equipment [Line Items]
Depreciation expense	3,900	3,800	2,600
Total expenses incurred	2,000	1,200	1,100
Total capital expenditures	4,100	6,400	$ 9,800
Capital expenditures total to date	44,600
Assets held under capital lases
Property, Plant and Equipment [Line Items]
Depreciation expense	300	100
Capital leased assets	3,600	1,600
Capital leases accumulated depreciation	$ 400	$ 100