Commitments and Contingencies (Details 2) - USD ($)	1 Months Ended	3 Months Ended	6 Months Ended
	Mar. 31, 2015	Jun. 30, 2015	Jun. 30, 2015
Lawsuit alleging violations of lanham act and other state laws
Legal Proceedings
Loss contingency			$ 0
Lawsuit alleging violations of lanham act and other state laws | Minimum
Legal Proceedings
Damages sought	$ 250,000,000
CNCDA Litigation [Member]
Legal Proceedings
Loss contingency		$ 0
Securities Litigation [Member]
Legal Proceedings
Loss contingency		0
Participating Dealer Litigation [Member]
Legal Proceedings
Loss contingency		$ 0