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Stock-Based Incentive Plan - Fair Value Assumptions (Details) - Restricted Stock And Contingent Restricted Stock, Market-Based - $ / shares
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Weighted average fair value of market-based awards granted (in USD per share) $ 3.79 $ 8.24
Risk-free interest rate, minimum 1.65%  
Risk-free interest rate, maximum 1.87%  
Risk-free interest rate 2.69%  
Expected life in years 2 years 9 months 26 days  
Expected volatility, minimum 38.60%  
Expected volatility, maximum 43.70%  
Expected volatility 41.80%  
Dividend yield 4.00%  
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life in years 1 year 4 months 6 days  
Dividend yield 6.00%  
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life in years 2 years 6 months 22 days  
Dividend yield 7.20%