Quarterly report pursuant to Section 13 or 15(d)

Foreign Currency Translation - Additional Information (Detail)

v3.8.0.1
Foreign Currency Translation - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Foreign Currency [Abstract]    
Accumulated other comprehensive income (loss) $ 252,942 $ 253,282
Cumulative foreign currency adjustments $ 253,361 $ 253,565
Cumulative inflation rate 100.00%  
Cumulative inflation period 3 years