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Details of Selected Balance Sheet Accounts - Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 300,526 | $ 313,960
Accumulated Amortization | 104,914 | 108,211
Net Carrying Amount | 195,612 | 205,749
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 168,290 | 168,288
Accumulated Amortization | 60,937 | 55,380
Net Carrying Amount | 107,353 | 112,908
Patents/Technology/Know-how |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 78,528 | 75,920
Accumulated Amortization | 30,425 | 26,124
Net Carrying Amount | 48,103 | 49,796
Noncompete agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 0 | 16,044
Accumulated Amortization | 0 | 14,742
Net Carrying Amount | 0 | 1,302
Tradenames and other |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 53,708 | 53,708
Accumulated Amortization | 13,552 | 11,965
Net Carrying Amount | $ 40,156 | $ 41,743

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