Business Segments and Geographic Information - Schedule of Sales from External Customers and Long Lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets - net	$ 298,273	$ 280,316	$ 281,220
U.S. Plans
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets - net	169,159	165,721	171,111
North America, excluding U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets - net	5,028	3,829	3,398
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets - net	99,989	88,104	85,100
Asia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets - net	23,950	22,505	21,355
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Total long-lived assets - net	$ 147	$ 157	$ 256