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Intangible Assets, Net - Summary of Carrying Amount of Intangible Assets by Major Asset Class (Detail) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value as of Acquisition Date | $ 181,273 | $ 181,273 |
Accumulated Amortization | (78,208) | (63,860) |
Net Carrying Value | 103,065 | 117,413 | $ 131,883
Customer relationships |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value as of Acquisition Date | 173,746 | 173,746 |
Accumulated Amortization | (74,250) | (60,603) |
Net Carrying Value | $ 99,496 | 113,143 |
Customer relationships | Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Useful Life in Years | 12 years |  |
Customer relationships | Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Useful Life in Years | 20 years |  |
Trademark and trade name |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Gross Carrying Value as of Acquisition Date | $ 7,527 | 7,527 |
Accumulated Amortization | (3,958) | (3,257) |
Net Carrying Value | $ 3,569 | $ 4,270 |
Trademark and trade name | Minimum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Useful Life in Years | 8 years |  |
Trademark and trade name | Maximum |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Estimated Useful Life in Years | 15 years |  |

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