Organization, Basis of Presentation, and Summary of Significant Accounting Policies Concentration of Credit and Business Risk (Details) $ in Thousands	5 Months Ended	12 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2016 USD ($) dealer	Jun. 30, 2015 USD ($)	Jun. 30, 2014	Apr. 02, 2015 USD ($)
Concentration Risk [Line Items]
Capitalized offering costs	$ (1,550)		$ (1,498)
Total debt		$ 71,086	$ 77,342
Concentration risk, credit risk, line of credit period		14 days
Number of independent dealers | dealer		205
Customer Concentration Risk [Member]
Concentration Risk [Line Items]
Concentration risk percentage		5.30%	4.70%	4.70%
Unit Volume [Member]
Concentration Risk [Line Items]
Concentration risk percentage		31.90%	33.70%	34.10%
Secured Debt [Member]
Concentration Risk [Line Items]
Total debt					$ 80,000
Additional Paid-in Capital [Member]
Concentration Risk [Line Items]
Capitalized offering costs	$ (1,550)		$ (1,498)