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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
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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

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