Goodwill and Intangible Assets - Summary of Intangible Assets from Continuing Operations (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 133,272	$ 130,714
Finite intangible assets, Accumulated Amortization	(50,190)	(42,019)
Net Carrying Amount	83,082	88,695
Estimated salvage value of the asset	400	400
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible assets gross excluding goodwill	133,972	131,414
Intangible assets, net	83,782	89,395
Other intellectual property
Acquired Indefinite-lived Intangible Assets [Line Items]
Net Carrying Amount	700	700
Internet domain names
Acquired Indefinite-lived Intangible Assets [Line Items]
Net Carrying Amount	300	300
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	77,903	76,414
Finite intangible assets, Accumulated Amortization	(27,065)	(22,652)
Net Carrying Amount	$ 50,838	$ 53,762
Customer relationships | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	1 year	1 year
Customer relationships | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	11 years	11 years
Trademarks/trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 24,835	$ 24,835
Finite intangible assets, Accumulated Amortization	(9,489)	(7,763)
Net Carrying Amount	$ 15,346	$ 17,072
Trademarks/trade names | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	3 years	3 years
Trademarks/trade names | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	11 years	11 years
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 26,889	$ 25,820
Finite intangible assets, Accumulated Amortization	(10,071)	(8,055)
Net Carrying Amount	$ 16,818	$ 17,765
Technology | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	5 years	5 years
Technology | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	10 years	10 years
Non-compete agreements
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 3,645	$ 3,645
Finite intangible assets, Accumulated Amortization	(3,565)	(3,549)
Net Carrying Amount	$ 80	$ 96
Non-compete agreements | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	2 years	2 years
Non-compete agreements | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, useful life	5 years	5 years