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Commitment and Contingencies - Narrative (Details) |  |  |  | 1 Months Ended | 12 Months Ended |
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May 27, 2017 USD ($) | May 02, 2017 USD ($) | Aug. 26, 2016 USD ($) | Mar. 31, 2008 USD ($) Option | Jun. 30, 2019 USD ($) unit | Jun. 30, 2018 USD ($) unit | Jun. 30, 2017 USD ($) unit | Jun. 30, 2016 USD ($) | Dec. 15, 2016 USD ($)
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |  |  |  |  |
Floor financing, repurchase obligations |  |  |  |  | $ 239,315,000 | $ 163,626,000 |  |  |
Number of repurchase units | unit |  |  |  |  | 8 | 0 | 0 |  |
Monthly lease payments |  |  |  | $ 171,000 |  |  |  |  |
Lease, number of options | Option |  |  |  | 3 |  |  |  |  |
Sale leaseback transaction, lease terms |  |  |  | 10 years |  |  |  |  |
Operating leases, rental expense |  |  |  |  | $ 2,746,000 | $ 2,568,000 | $ 2,384,000 |  |
Amount awarded from other party |  | $ 2,500,000 |  |  |  |  |  |  |
Damages sought, value |  |  | $ 5,000,000 |  |  |  |  | $ 3,268,000 |
Amended litigation settlement |  |  |  |  |  |  |  |  | $ 1,938,000
Litigation settlement, amount agreed to be paid | $ 2,175,000 |  |  |  |  |  |  |  |
Loss contingency accrual |  |  |  |  |  |  | $ 0 |  |

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