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Stock-Based Incentive Plan - Fair Value Assumptions (Details)
12 Months Ended
Jun. 30, 2019
$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Risk-free interest rate 2.69%
Expected life in years 2 years 9 months 26 days
Expected volatility 41.80%
Dividend yield 4.00%
Restricted Stock, Market Based  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average fair value of market-based awards granted (in dollars per share) $ 8.24