Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Narrative (Details)

v3.5.0.2
Goodwill and Intangible Assets - Narrative (Details) - USD ($)
 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]      
Amortization of intangible assets $ 6,801,333 $ 6,836,616  
Goodwill $ 86,043,148 $ 86,131,395 $ 86,043,148
Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Acquired finite-lived intangible assets, weighted average useful life 3 years 7 months 6 days    
Trade names      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 10 years    
Acquired finite-lived intangible assets, weighted average useful life 8 years 1 month 24 days    
Minimum | Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 4 years    
Maximum | Customer relationships      
Finite-Lived Intangible Assets [Line Items]      
Finite-lived intangible asset, useful life 10 years