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Schedule of Tax Effects Allocated to Each Component of Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Components Of Other Comprehensive Income Loss [Line Items]        
Foreign currency translation adjustment $ 1,193 $ 2,972 $ 14,886 $ (16,903)
Unrealized (loss) gain on cash flow hedging instruments (1,483) (329) (2,569) 1,898
Income tax benefit (expense) 401 88 694 (513)
Unrealized (loss) gain on cash flow hedging instruments, net of tax (1,082) (241) (1,875) 1,385
Reclassification of loss (gain) on cash flow hedging instruments into earnings 1,611 (1,366) 545 (1,554)
Income tax (benefit) expense (435) 369 (147) 420
Reclassification of loss (gain) on cash flow hedging instruments into earnings, net of tax 1,176 (997) 398 (1,134)
Unrealized (loss) gain on available-for-sale securities (28) 23 (15) 34
Income tax benefit (expense) 10 (9) 6 (13)
Unrealized (loss) gain on available-for-sale securities, net of tax (18) 14 (9) 21
Other comprehensive income (loss) $ 1,269 $ 1,748 $ 13,400 $ (16,631)