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Goodwill and Intangible Assets, Net - Components of Intangible Assets (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Finite Lived Intangible Assets [Line Items]    
Weighted average remaining useful life 3 years 6 months  
Gross $ 17,191 $ 17,191
Accumulated amortization (13,707) (12,095)
Net $ 3,484 $ 5,096
Customer Relationships [Member]    
Finite Lived Intangible Assets [Line Items]    
Weighted average remaining useful life 1 year 6 months 2 years 6 months
Gross $ 13,997 $ 13,997
Accumulated amortization (11,897) (10,498)
Net $ 2,100 $ 3,499
Trade Name [Member]    
Finite Lived Intangible Assets [Line Items]    
Weighted average remaining useful life 6 years 6 months 7 years 6 months
Gross $ 3,194 $ 3,194
Accumulated amortization (1,810) (1,597)
Net $ 1,384 $ 1,597