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Income Taxes - Summary of (Benefit) Provision for Income Taxes (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Current |  |  |
U.S. Federal | $ (2) | $ (14) | $ (637)
U.S. State | 309 | 868 | 198
Foreign | 1,879 | 1,796 | 1,749
Total | 2,186 | 2,650 | 1,310
Deferred |  |  |
U.S. Federal | 563,658 | 170,508 | (483,681)
U.S. State | (1,095) | 3,682 | (14,973)
Foreign | (78) | 0 | 0
Total | 562,485 | 174,190 | (498,654)
Income tax benefit (provision), total | $ 564,671 | $ 176,840 | $ (497,344)

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