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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 | 6 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Dec. 31, 2020
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 794,133 | $ 575,160
Intangible assets - Gross Carrying Amount | 885,033 | 666,060
Amortized intangible assets - Accumulated Amortization | (258,447) | (250,497)
Amortized intangible assets - Net | 535,686 | 324,663
Intangible assets - Net | 626,586 | 415,563
Banjo trade name |  |
Goodwill And Intangible Assets [Line Items] |  |
Indefinite lived intangible assets - Net | 62,100 | 62,100
Akron Brass trade name |  |
Goodwill And Intangible Assets [Line Items] |  |
Indefinite lived intangible assets - Net | 28,800 | 28,800
Patents |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | 3,121 | 3,030
Amortized intangible assets - Accumulated Amortization | (1,888) | (1,740)
Amortized intangible assets - Net | $ 1,233 | 1,290
Amortized intangible assets - Weighted Average Life | 10 years |
Trade names |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 149,217 | 130,793
Amortized intangible assets - Accumulated Amortization | (74,505) | (72,685)
Amortized intangible assets - Net | $ 74,712 | 58,108
Amortized intangible assets - Weighted Average Life | 15 years |
Customer relationships |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 493,348 | 318,350
Amortized intangible assets - Accumulated Amortization | (125,620) | (120,294)
Amortized intangible assets - Net | $ 367,728 | 198,056
Amortized intangible assets - Weighted Average Life | 13 years |
Unpatented technology |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 147,747 | 122,287
Amortized intangible assets - Accumulated Amortization | (55,751) | (55,131)
Amortized intangible assets - Net | $ 91,996 | 67,156
Amortized intangible assets - Weighted Average Life | 13 years |
Other |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 700 | 700
Amortized intangible assets - Accumulated Amortization | (683) | (647)
Amortized intangible assets - Net | $ 17 | $ 53
Amortized intangible assets - Weighted Average Life | 10 years |

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