Goodwill and Intangible Assets, Net - Components of Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Weighted average remaining useful life	3 years 7 months 6 days
Gross	$ 17,191	$ 17,191
Accumulated Amortization	(15,320)	(13,707)
Net	$ 1,871	$ 3,484
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Weighted average remaining useful life	6 months	1 year 6 months
Gross	$ 13,997	$ 13,997
Accumulated Amortization	(13,297)	(11,897)
Net	$ 700	$ 2,100
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Weighted average remaining useful life	5 years 6 months	6 years 6 months
Gross	$ 3,194	$ 3,194
Accumulated Amortization	(2,023)	(1,810)
Net	$ 1,171	$ 1,384