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Commitments and Contingencies (Narrative) (Details) - USD ($)
12 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2015
Loss Contingencies [Line Items]      
Estimated Litigation Liability $ 1,000,000    
Lease expense under operating leases 2,600,000 $ 2,500,000 $ 2,300,000
Other Investors      
Loss Contingencies [Line Items]      
Recourse liability 200,000    
Mortgage Partnership Finance (MPF) Program      
Loss Contingencies [Line Items]      
Recourse liability 105,000 242,000  
Federal Housing Administration Certificates and Obligations (FHA) [Member]      
Loss Contingencies [Line Items]      
Recourse liability $ 0 $ 11,000