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Schedule of Other Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]    
Deposit for business acquisition $ 371,756  
Deposits 8,606 $ 12,021
Strategic investments 18,056 30,811
Long-term forward foreign currency exchange contract assets 3,533 5,387
Other 6,693 6,338
Total other assets $ 408,644 $ 54,557