Annual report pursuant to Section 13 and 15(d)

Reconciliation Between Income Tax Expenses (Parenthetical) (Detail)

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Reconciliation Between Income Tax Expenses (Parenthetical) (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
One-time benefit due to re-measurement of net deferred tax liabilities   $ (79,834)
One-time charge to true-up deferred taxes $ 1,913  
Deemed repatriation tax amount   14,512
Reduction in deferred tax assets with regard to foreign tax credit carryforwards $ 17,267 $ 20,433