Goodwill and Intangible Assets, Net - Components of Intangible Assets (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Finite Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life	3 years 4 months 24 days
Gross	$ 17,191	$ 17,191
Accumulated Amortization	(14,514)	(13,707)
Net	$ 2,677	$ 3,484
Customer Relationships [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life	1 year	1 year 6 months
Gross	$ 13,997	$ 13,997
Accumulated Amortization	(12,597)	(11,897)
Net	$ 1,400	$ 2,100
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life	6 years	6 years 6 months
Gross	$ 3,194	$ 3,194
Accumulated Amortization	(1,917)	(1,810)
Net	$ 1,277	$ 1,384