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Goodwill and Intangible Assets - Schedule of Gross Carrying Value and Accumulated Amortization for Each Major Class of Intangible Asset (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 575,160 | $ 507,736
Intangible assets - Gross Carrying Amount | 666,060 | 598,636
Accumulated Amortization | (250,497) | (210,605)
Amortized intangible assets - Net | 324,663 | 297,131
Intangible assets - Net | 415,563 | 388,031
Banjo trade name |  |
Goodwill And Intangible Assets [Line Items] |  |
Indefinite lived intangible assets | 62,100 | 62,100
Akron Brass trade name |  |
Goodwill And Intangible Assets [Line Items] |  |
Indefinite lived intangible assets | 28,800 | 28,800
Patents |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | 3,030 | 6,678
Accumulated Amortization | (1,740) | (5,276)
Amortized intangible assets - Net | $ 1,290 | 1,402
Amortized intangible assets - Weighted Average Life | 10 years |
Trade names |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 130,793 | 123,062
Accumulated Amortization | (72,685) | (64,938)
Amortized intangible assets - Net | $ 58,108 | 58,124
Amortized intangible assets - Weighted Average Life | 16 years |
Customer relationships |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 318,350 | 275,575
Accumulated Amortization | (120,294) | (96,252)
Amortized intangible assets - Net | $ 198,056 | 179,323
Amortized intangible assets - Weighted Average Life | 13 years |
Unpatented technology and other |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 122,287 | 101,721
Accumulated Amortization | (55,131) | (43,561)
Amortized intangible assets - Net | $ 67,156 | 58,160
Amortized intangible assets - Weighted Average Life | 13 years |
Other |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 700 | 700
Accumulated Amortization | (647) | (578)
Amortized intangible assets - Net | $ 53 | $ 122
Amortized intangible assets - Weighted Average Life | 10 years |

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