Property Plant and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 127,177	$ 90,520
Accumulated depreciation	(65,459)	(55,099)
Property, plant and equipment, net	61,718	35,421	$ 40,550
Land, Buildings and Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	53,055	38,384
Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, gross	$ 74,122	$ 52,136