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Basis of Presentation and Significant Accounting Policies - Schedule of Estimated Useful Lives of Intangible Assets (Details)
 9 Months Ended
Sep. 30, 2015
Customer relationships | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 3 years
Customer relationships | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 14 years
Customer relationships | Weighted Average  
Finite-Lived Intangible Assets [Line Items]  
Weighted Average Amortization Period (in years) 12 years 18 days
Carrier relationships  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 2 years
Carrier relationships | Weighted Average  
Finite-Lived Intangible Assets [Line Items]  
Weighted Average Amortization Period (in years) 2 years
Trade names | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 3 years
Trade names | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 3 years 6 months
Trade names | Weighted Average  
Finite-Lived Intangible Assets [Line Items]  
Weighted Average Amortization Period (in years) 3 years 22 days
Non-compete agreements | Weighted Average  
Finite-Lived Intangible Assets [Line Items]  
Weighted Average Amortization Period (in years) 4 years 6 months 26 days
Other intangible assets | Minimum  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 1 year 6 months
Other intangible assets | Maximum  
Finite-Lived Intangible Assets [Line Items]  
Estimated Useful Life (in years) 5 years
Other intangible assets | Weighted Average  
Finite-Lived Intangible Assets [Line Items]  
Weighted Average Amortization Period (in years) 4 years 2 months 27 days