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DEBT AND NOTES PAYABLE - Credit Facility (Narrative) (Details)
 12 Months Ended
Nov. 09, 2018
USD ($)
extension
Jun. 30, 2022
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Line of Credit Facility [Line Items]        
Repayments of outstanding borrowings   $ 250,000,000 $ 225,000,000 $ 350,000,000
Total debt and notes payable   454,327,000 478,571,000  
Cash paid for interest expense   $ 2,600,000    
Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Number of available extensions | extension 2      
Duration of each available extension 1 year      
Maximum borrowing capacity $ 1,000,000,000      
Additional borrowing capacity 350,000,000      
Weighted average interest rate (percent)   2.178%    
Commitment fee (percent)   0.10%    
Indebtedness or guarantee threshold $ 75,000,000      
Line of credit facility borrowing   $ 325,000,000    
Repayments of outstanding borrowings   250,000,000    
Total debt and notes payable   150,000,000    
Repayment of outstanding borrowings   849,900,000    
Interest expense   $ 2,800,000 2,200,000  
Cash paid for interest expense     $ 2,200,000  
Revolving Credit Facility | Minimum        
Line of Credit Facility [Line Items]        
Commitment fee on unused credit facility (percent) 0.10%      
Revolving Credit Facility | Maximum        
Line of Credit Facility [Line Items]        
Commitment fee on unused credit facility (percent) 0.20%      
Revolving Credit Facility | LIBOR | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (percent) 1.00%      
Revolving Credit Facility | LIBOR | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (percent) 1.50%      
Revolving Credit Facility | Prime Rate | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (percent) 0.00%      
Revolving Credit Facility | Prime Rate | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate (percent) 0.50%      
Letter of Credit        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity $ 50,000,000      
Swing Line Loan        
Line of Credit Facility [Line Items]        
Maximum borrowing capacity $ 100,000,000