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Foreign Currency Translation - Additional Information (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Dec. 31, 2018
Foreign Currency [Abstract]    
Accumulated other comprehensive income (loss) $ 322,633 $ 319,007
Cumulative foreign currency adjustments $ 309,620 $ 315,300
Cumulative inflation rate 100.00%  
Cumulative inflation period 3 years