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Debt Outstanding Balances (Details) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Oct. 05, 2022
Availability under senior credit facility        
Senior secured revolving credit facility $ 100,000     $ 90,000
Borrowings outstanding 15,000 $ 0    
Availability under the senior secured revolving credit facility 42,500      
Letters of Credit Outstanding, Amount $ 23,300      
Debt Instrument [Line Items]        
Line of credit facility, expiration date Sep. 09, 2026      
Letters of Credit Outstanding, Amount $ 23,300      
Accelerated amortization of deferred debt amendment fees (Note 5) 1,518 0 $ 0  
J.P. Morgan Chase Bank        
Availability under senior credit facility        
Senior secured revolving credit facility   200,000    
Letters of Credit Outstanding, Amount   $ 41,300    
Debt Instrument [Line Items]        
Line of credit facility, expiration date   Nov. 02, 2023    
Letters of Credit Outstanding, Amount   $ 41,300    
Accelerated amortization of deferred debt amendment fees (Note 5) $ 1,500