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Summary of Significant Accounting Policies - Schedule of Estimated Useful Life of Intangible Assets (Detail)
12 Months Ended
Dec. 31, 2014
Trademarks [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangible assets, Estimated useful life 15 years
Customer Relationships [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangible assets, Estimated useful life 5 years
Websites [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangible assets, Estimated useful life 4 years
Domain Names [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangible assets, Estimated useful life 4 years
Licensing Agreements [Member]  
Finite-Lived Intangible Assets [Line Items]  
Intangible assets, Estimated useful life 1 year 9 months