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Segment and Geographic Information - Schedule of Long Lived Assets by Geographic Area (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Revenues From External Customers And Long Lived Assets [Line Items]    
Property and equipment, net $ 123,657 $ 129,020
United States [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Property and equipment, net 109,886 113,628
China [Member]    
Revenues From External Customers And Long Lived Assets [Line Items]    
Property and equipment, net $ 13,771 $ 15,392