Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Estimated Useful Lives of Finite Lived Intangible Assets (Details)

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Summary of Significant Accounting Policies - Estimated Useful Lives of Finite Lived Intangible Assets (Details)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 6 years 7 months 6 days 6 years 8 months 12 days
Developed technologies    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 3 years 2 months 12 days 3 years 2 months 12 days
Developed technologies | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 3 years  
Developed technologies | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 10 years  
Customer relationships    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 9 years 1 month 14 days 9 years
Customer relationships | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 1 year  
Customer relationships | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 10 years  
Vendor relationships    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 7 years 7 years
Vendor relationships | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 7 years  
Trade names    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 6 years 10 months 24 days  
Trade names | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 1 year  
Trade names | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Estimated useful life of finite-lived intangible asset 7 years