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Schedule of Tax Effects Allocated to Each Component of Other Comprehensive Loss (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Components Of Other Comprehensive Income Loss [Line Items]      
Foreign currency translation adjustment $ 6,211 $ (39,378) $ (21,117)
Unrealized (loss) gain on cash flow hedging instruments (1,321) 3,716 384
Income tax benefit (expense) 356 (1,003) (104)
Unrealized (loss) gain on cash flow hedging instruments, net of tax (965) 2,713 280
Reclassification of loss (gain) on cash flow hedging instruments into earnings 442 (2,730)  
Income tax (benefit) expense (119) 737  
Reclassification of loss (gain) on cash flow hedging instruments into earnings, net of tax 323 (1,993)  
Unrealized gain (loss) on available-for-sale securities 27 (12) 1
Income tax (expense) benefit (13) 4  
Unrealized gain (loss) on available-for-sale securities, net of tax 14 (8) 1
Other comprehensive gain (loss) $ 5,583 $ (38,666) $ (20,836)