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Details of Selected Balance Sheet Accounts - Other Intangible Assets (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 300,683 | $ 313,960
Accumulated Amortization | 109,838 | 108,211
Net Carrying Amount | 190,845 | 205,749
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 168,283 | 168,288
Accumulated Amortization | 63,956 | 55,380
Net Carrying Amount | 104,327 | 112,908
Patents/Technology/Know-how |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 78,692 | 75,920
Accumulated Amortization | 31,497 | 26,124
Net Carrying Amount | 47,195 | 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 | 14,385 | 11,965
Net Carrying Amount | $ 39,323 | $ 41,743

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