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Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 408,769 | $ 340,282
Gross Carrying Value | 409,469 | 340,982
Accumulated Amortization | (69,306) | (53,882)
Accumulated Amortization | (69,306) | (53,882)
Net Carrying Value | 339,463 | 286,400
Net Carrying Value | $ 340,163 | $ 287,100
Weighted Average Useful Life (in years) | 16 years | 16 years
Trademark |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 700 | $ 700
Net Carrying Value | 700 | 700
Technology - developed |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | 141,039 | 114,217
Accumulated Amortization | (19,426) | (14,444)
Net Carrying Value | $ 121,613 | $ 99,773
Weighted Average Useful Life (in years) | 17 years | 17 years
Patents |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 240 | $ 240
Accumulated Amortization | (240) | (240)
Net Carrying Value |  |
Weighted Average Useful Life (in years) | 8 years | 8 years
Customer relationships |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 257,297 | $ 217,790
Accumulated Amortization | (47,363) | (37,333)
Net Carrying Value | $ 209,934 | $ 180,457
Weighted Average Useful Life (in years) | 15 years | 16 years
Trademarks |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 7,367 | $ 5,893
Accumulated Amortization | (771) | (541)
Net Carrying Value | $ 6,596 | $ 5,352
Weighted Average Useful Life (in years) | 19 years | 20 years
Other intangibles |  |
Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 2,826 | $ 2,142
Accumulated Amortization | (1,506) | (1,324)
Net Carrying Value | $ 1,320 | $ 818
Weighted Average Useful Life (in years) | 4 years | 3 years

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