Goodwill and Intangible Assets - Summary of Intangible Assets from Continuing Operations (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 129,339	$ 128,067
Finite intangible assets, Accumulated Amortization	(38,219)	(26,769)
Finite intangible assets, Net Carrying Amount	91,120	101,298
Intangible assets gross excluding goodwill	130,039	128,767
Intangible assets, net	91,820	101,998
Estimated salvage value of the asset	400	400
Internet Domain Names
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Indefinite-lived intangible assets, Net Carrying Amount		300
Other Intellectual Property
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Indefinite-lived intangible assets, Net Carrying Amount	700	700
Customer Relationships
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, Gross Carrying Amount	75,120	74,656
Finite intangible assets, Accumulated Amortization	(20,695)	(14,817)
Finite intangible assets, Net Carrying Amount	$ 54,425	$ 59,839
Customer Relationships | Minimum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	1 year	1 year
Customer Relationships | Maximum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	11 years	11 years
Trademarks/trade names
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 24,822	$ 24,543
Finite intangible assets, Accumulated Amortization	(6,898)	(4,322)
Finite intangible assets, Net Carrying Amount	$ 17,924	$ 20,221
Trademarks/trade names | Minimum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	3 years	3 years
Trademarks/trade names | Maximum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	11 years	11 years
Technology
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	5 years
Finite intangible assets, Gross Carrying Amount	$ 25,752	$ 25,223
Finite intangible assets, Accumulated Amortization	(7,085)	(4,263)
Finite intangible assets, Net Carrying Amount	$ 18,667	$ 20,960
Technology | Minimum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	5 years	5 years
Technology | Maximum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	10 years	10 years
Non-compete agreements
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	5 years
Finite intangible assets, Gross Carrying Amount	$ 3,645	$ 3,645
Finite intangible assets, Accumulated Amortization	(3,541)	(3,367)
Finite intangible assets, Net Carrying Amount	$ 104	$ 278
Non-compete agreements | Minimum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	2 years	2 years
Non-compete agreements | Maximum
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	5 years	5 years
Internet Domain Names
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	2 years