Goodwill and Intangible Assets - Summary of Intangible Assets from Continuing Operations (Detail) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	$ 132,827	$ 130,714
Finite intangible assets, Accumulated Amortization	(46,083)	(42,019)
Remaining amortization expense	86,744	88,695
Estimated salvage value of the asset	400	400
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Intangible assets gross excluding goodwill	133,527	131,414
Intangible assets, net	87,444	89,395
Internet domain names
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net Carrying Amount	300
Other intellectual property
Acquired Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net Carrying Amount	700	700
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Finite intangible assets, Gross Carrying Amount	77,279	76,414
Finite intangible assets, Accumulated Amortization	(24,835)	(22,652)
Remaining amortization expense	$ 52,444	$ 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	$ 24,834	$ 24,835
Finite intangible assets, Accumulated Amortization	(8,626)	(7,763)
Remaining amortization expense	$ 16,208	$ 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	$ 27,069	$ 25,820
Finite intangible assets, Accumulated Amortization	(9,064)	(8,055)
Remaining amortization expense	$ 18,005	$ 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	(3,558)	(3,549)
Remaining amortization expense	$ 87	$ 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