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Organization, Basis of Presentation, and Summary of Significant Accounting Policies Concentration Risk (Details) $ in Thousands | 5 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) dealer | Jun. 30, 2014 USD ($) | Jun. 30, 2013 | Apr. 02, 2015 USD ($)
Concentration Risk [Line Items] |  |  |  |  |
Capitalized offering costs | $ (1,550) | $ (1,498) |  |  |
Long-term Debt | 0 | $ 78,500 | $ 0 |  |
Concentration risk, credit risk, line of credit period |  | 14 days |  |  |
Number of independent dealers | dealer |  | 178 |  |  |
Customer Concentration Risk [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 4.70% | 4.70% | 4.70% |
Unit Volume [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk percentage |  | 33.70% | 34.10% | 36.10% |
Secured Debt [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Long-term Debt |  | $ 78,500 |  |  | $ 80,000
Additional Paid-in Capital [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Capitalized offering costs | $ (1,550) | $ (1,498) | $ (1,550) |  |

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