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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, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Balance $ 334,207 $ 344,156     $ 344,156  
FX translation 324 (9,063) $ 657   (8,739) $ (1,112)
Balance 339,660 334,207     339,660  
Foreign Currency Translation Adjustments            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Balance (14,761) (5,698) (6,276) $ (4,507) (5,698) (4,507)
FX translation 324 (9,063) 657 (1,769)    
Balance $ (14,437) $ (14,761) $ (5,619) $ (6,276) $ (14,437) $ (5,619)