Components of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	$ 236,393	$ 197,122
Amortizable intangible assets, Accumulated Amortization	(41,248)	(32,459)
Amortizable intangible assets, Net Carrying Value	195,145	164,663
Indefinite-lived trademarks	89,676	89,676
Total acquired intangible assets, Gross Carrying Amount	326,069	286,798
Total acquired intangible assets, Net Carrying Value	284,821	254,339
Developed technology
Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	8,438	5,143
Amortizable intangible assets, Accumulated Amortization	(4,174)	(2,392)
Amortizable intangible assets, Net Carrying Value	4,264	2,751
Customer Relationships
Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	227,583	191,979
Amortizable intangible assets, Accumulated Amortization	(36,985)	(30,067)
Amortizable intangible assets, Net Carrying Value	190,598	$ 161,912
Trademarks
Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	372
Amortizable intangible assets, Accumulated Amortization	(89)
Amortizable intangible assets, Net Carrying Value	$ 283