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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 | 9 Months Ended |
--- | --- | ---
Sep. 30, 2020 | Dec. 31, 2019
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 565,168 | $ 507,736
Intangible assets - Gross Carrying Amount | 656,068 | 598,636
Amortized intangible assets - Accumulated Amortization | (238,988) | (210,605)
Amortized intangible assets - Net | 326,180 | 297,131
Intangible assets - Net | 417,080 | 388,031
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 | 2,865 | 6,678
Amortized intangible assets - Accumulated Amortization | (1,668) | (5,276)
Amortized intangible assets - Net | $ 1,197 | 1,402
Amortized intangible assets - Weighted Average Life | 10 years |
Trade names |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 128,393 | 123,062
Amortized intangible assets - Accumulated Amortization | (69,568) | (64,938)
Amortized intangible assets - Net | $ 58,825 | 58,124
Amortized intangible assets - Weighted Average Life | 16 years |
Customer relationships |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 313,977 | 275,575
Amortized intangible assets - Accumulated Amortization | (115,815) | (96,252)
Amortized intangible assets - Net | $ 198,162 | 179,323
Amortized intangible assets - Weighted Average Life | 13 years |
Unpatented technology |  |
Goodwill And Intangible Assets [Line Items] |  |
Amortized intangible assets - Gross Carrying Amount | $ 119,233 | 101,721
Amortized intangible assets - Accumulated Amortization | (51,307) | (43,561)
Amortized intangible assets - Net | $ 67,926 | 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
Amortized intangible assets - Accumulated Amortization | (630) | (578)
Amortized intangible assets - Net | $ 70 | $ 122
Amortized intangible assets - Weighted Average Life | 10 years |

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