Annual report pursuant to Section 13 and 15(d)

Reconciliation Between Income Tax Expenses (Parenthetical) (Detail)

Reconciliation Between Income Tax Expenses (Parenthetical) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Benefit of rate differential on earnings $ 122,975  
One-time charge to true-up deferred taxes   $ 1,913
Tax losses with investment in foreign subsidiaries and write down of intercompany receivables of foreign subsidiaries 135,599  
Reduction in deferred tax assets with regard to foreign tax credit carryforwards   $ 17,267
Tax charge for remeasurement of deferred taxes and tax attributes 49,866  
Tax Credit, Foreign $ 21,193