Goodwill (Details)	9 Months Ended
	Sep. 30, 2016 USD ($) Unit
Goodwill [Roll Forward]
Net goodwill as of December 31, 2014	$ 206,257,000
Foreign exchange impact	(1,278,664)
Net goodwill as of June 30, 2015	$ 204,978,000
Number of Reportable Segments | Unit	2
North America [Member]
Goodwill [Roll Forward]
Net goodwill as of December 31, 2014	$ 170,734,819
Foreign exchange impact	38,367
Net goodwill as of June 30, 2015	170,773,186
International [Member]
Goodwill [Roll Forward]
Net goodwill as of December 31, 2014	35,521,846
Foreign exchange impact	(1,317,031)
Net goodwill as of June 30, 2015	$ 34,204,815