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Reconciliation Between Income Tax Expenses (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Tax Disclosure [Abstract] |  |  |  |
Computed statutory tax expense |  | $ (194,739) | $ 57,490 | $ 65,254
State and local income taxes, net of federal income tax impact |  | (1,153) | 8,479 | 12,611
Changes in valuation allowance |  | 46,731 | 2,532 | 131
Foreign tax rate differential |  | (6,633) | 4,646 | 2,235
Foreign tax credits |  |  | 4,143 | 3,927
Impacts related to 2017 Tax Act | [1] |  |  | 19,180
Impacts related to COVID-19 pandemic | [2] | (187,515) |  |
Changes in uncertain tax positions |  | 24,879 | 197 | (6,139)
Other, net |  | 9,054 | 2,425 | (1,770)
Income taxes |  | $ (309,376) | $ 79,912 | $ 95,429
[1] | The amount for the year ended December 31, 2018 includes a one-time charge to true-up deferred taxes of $1,913 and a reduction in deferred tax assets with regard to foreign tax credit carryforwards of $17,267.
[2] | The amount for the year ended December 31, 2020 includes benefits of a rate differential on earnings of $122,975, tax losses with respect to investments in foreign subsidiaries and a write down of certain intercompany receivables associated with the Company’s foreign subsidiaries of $135,599, offset by a tax charge for the remeasurement of deferred taxes and tax attributes of $49,866 and dislodged foreign tax credits not benefited of $21,193.

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