Summary of Intangible Assets from Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended		12 Months Ended
	Sep. 30, 2014		Dec. 31, 2013
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Gross Carrying Amount	$ 78,575		$ 74,607
Accumulated Amortization	(23,201)		(16,252)
Finite intangible assets, Net Carrying Amount	55,374		58,355
Intangible assets gross excluding goodwill	78,875		75,007
Intangible assets, net	55,674		58,755
Customer Relationships
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Gross Carrying Amount	48,469		45,601
Accumulated Amortization	(13,046)		(9,546)
Finite intangible assets, Net Carrying Amount	35,423		36,055
Trademarks/trade names
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Gross Carrying Amount	16,113		15,813
Accumulated Amortization	(3,612)		(2,373)
Finite intangible assets, Net Carrying Amount	12,501		13,440
Technology
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Gross Carrying Amount	9,927		9,527
Accumulated Amortization	(3,476)		(2,161)
Finite intangible assets, Net Carrying Amount	6,451		7,366
Non-compete agreements
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Gross Carrying Amount	3,666		3,666
Accumulated Amortization	(3,067)		(2,172)
Finite intangible assets, Net Carrying Amount	599		1,494
Other Intellectual Property
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	2 years	[1]
Indefinite-lived intangible asset useful life	Indefinite		Indefinite
Gross Carrying Amount	400	[1]
Finite intangible assets, Net Carrying Amount	400	[1]
Indefinite intangible assets, Net Carrying Amount	$ 300		$ 400
Minimum | Customer Relationships
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	1 year		1 year
Minimum | Trademarks/trade names
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	3 years		3 years
Minimum | Technology
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	5 years		5 years
Minimum | Non-compete agreements
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	2 years		2 years
Maximum | Customer Relationships
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	11 years		11 years
Maximum | Trademarks/trade names
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	11 years		11 years
Maximum | Technology
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	10 years		10 years
Maximum | Non-compete agreements
Acquired Finite And Indefinite Lived Assets Liabilities [Line Items]
Finite intangible assets, useful life	5 years		5 years

[1] Actua currently estimates the residual value of this asset to be $0.4 million.