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Commitment and Contingencies - Narrative (Details)
 1 Months Ended 12 Months Ended
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