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Share-Based Compensation - Cash-Settled Performance Units (Details) - $ / shares
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Shares vested (in shares)   0 0
Cash-Settled Performance Units      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Shares outstanding beginning period (in shares) 50,000 58,000 32,000
Shares granted (in shares) 0 42,000 87,000
Shares vested (in shares) (42,000) (32,000) (32,000)
Shares forfeited (in shares) (8,000) (18,000) (29,000)
Shares outstanding ending period (in shares) 0 50,000 58,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Weighted average grant date fair value, granted (dollars per share) $ 0 $ 11.27 $ 4.65
Weighted average grant date fair value, vested and issued (dollars per share) 0 0 0
Weighted average grant date fair value, forfeited (dollars per share) $ 7.68 $ 9.07 $ 6.48