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Income Taxes Reconciliation of Total Gross Liability Related to Uncertain Tax Positions (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Beginning Balance $ 17,548 $ 19,742 $ 21,438
Additions for tax positions related to prior years 5,646 2,235 874
Reductions for tax positions related to prior years (174) 0 0
Additions for tax positions related to current year 315 0 1,091
Lapses in statutes of limitations/settlements (12,128) (4,494) (3,578)
Foreign currency translation adjustment 432 65 (83)
Ending Balance $ 11,639 $ 17,548 $ 19,742