Intangible Assets, Net (Detail) - Intangible Assets, Net - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	$ 72,855		$ 72,855		$ 6,890
Accumulated amortization	(9,725)		(9,725)		(5,089)
Total estimated future amortization expense	63,130		63,130		1,801
Amortization of intangible assets	2,600	$ 400	4,800	$ 900
Covenant not to compete
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	1,900		1,900		1,900
Accumulated amortization	(1,288)		(1,288)		(971)
Total estimated future amortization expense	612		$ 612		929
Finite-lived intangible assets, useful life			3 years
Proprietary data and models
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	2,100		$ 2,100		2,100
Accumulated amortization	(1,906)		(1,906)		(1,694)
Total estimated future amortization expense	194		$ 194		406
Finite-lived intangible assets, useful life			3 years 8 months 12 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	57,718		$ 57,718		1,050
Accumulated amortization	(3,517)		(3,517)		(659)
Total estimated future amortization expense	54,201		$ 54,201		391
Finite-lived intangible assets, useful life			9 years 3 months 18 days
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	4,904		$ 4,904		1,720
Accumulated amortization	(1,970)		(1,970)		(1,645)
Total estimated future amortization expense	2,934		$ 2,934		75
Finite-lived intangible assets, useful life			4 years 10 months 25 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Carrying amount	6,233		$ 6,233		120
Accumulated amortization	(1,044)		(1,044)		(120)
Total estimated future amortization expense	$ 5,189		$ 5,189		$ 0
Finite-lived intangible assets, useful life			3 years