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Beginning Balance, Annual Activity and Ending Balance of Foreign Currency Translation Adjustment Included as Component of Accumulated Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Balance $ 360,046 $ 360,736     $ 360,736  
FX translation 2,914 (2,503) $ 324   411 $ (8,739)
Balance 369,371 360,046     369,371  
Foreign Currency Translation Adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Balance (11,825) (9,322) (14,761) $ (5,698) (9,322) (5,698)
FX translation 2,914 (2,503) 324 (9,063)    
Balance $ (8,911) $ (11,825) $ (14,437) $ (14,761) $ (8,911) $ (14,437)