Property and Equipment, Net - Property and Equipment Table (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 362,890	$ 357,260
Less: Accumulated depreciation	184,230	176,130
Property and equipment, net	178,660	181,130
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,010	14,820
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	68,260	67,790
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 279,620	$ 274,650