Property and Equipment, Net - Property and Equipment Table (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 496,020	$ 430,980
Less: Accumulated depreciation	242,960	216,650
Property and equipment, net	253,060	214,330
Land and Land Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	20,040	19,110
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	91,970	84,880
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 384,010	$ 326,990