Commitments and Contingencies - Schedule of Estimated Settlement of Divestiture Contract Obligation Based On Discounted Value (Detail) $ in Thousands	Dec. 31, 2020 USD ($)
Disclosure Commitments And Contingencies Schedule Of Estimated Settlement Of Divestiture Contract Obligation [Abstract]
2021	$ 92,593
2022	74,942
2023	62,639
2024	54,042
2025	47,704
Thereafter	152,175
Divestiture Contract Obligation	$ 484,095

Disclosure commitments and contingencies schedule of estimated settlement of divestiture contract obligation abstract.

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Estimated settlement divestiture contract obligation due.

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Estimated settlement divestiture contract obligation due current.

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Estimated settlement divestiture contract obligation due in year five.

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Estimated settlement divestiture contract obligation due in year four.

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Estimated settlement divestiture contract obligation due in year thereafter.

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Estimated settlement divestiture contract obligation due in year three.

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Estimated settlement divestiture contract obligation due in year two.

No definition available.

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