Goodwill (Details)	6 Months Ended
	Jun. 30, 2016 USD ($) Unit
Goodwill [Roll Forward]
Net goodwill as of December 31, 2014	$ 206,257,000
Foreign exchange impact	(1,359,634)
Net goodwill as of June 30, 2015	$ 204,897,000
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	42,939
Net goodwill as of June 30, 2015	170,777,758
International [Member]
Goodwill [Roll Forward]
Net goodwill as of December 31, 2014	35,521,846
Foreign exchange impact	(1,402,573)
Net goodwill as of June 30, 2015	$ 34,119,273