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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021
Performance Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period (in years) |  |  | 3 years |
Compensation expense | $ 0.3 |  | $ 0.8 |
Unrecognized compensation expense | 2.9 |  | $ 2.9 |
Weighted-average period over which remaining compensation expense will be recognized (in years) |  |  | 2 years |
Stock Settled Stock Appreciation Rights SARS [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense | 0.9 | $ 0.9 | $ 2.9 | $ 2.6
Unrecognized compensation expense | 3.9 |  | $ 3.9 |
Weighted-average period over which remaining compensation expense will be recognized (in years) |  |  | 2 years |
Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense | 1.3 | $ 0.8 | $ 3.7 | $ 2.6
Unrecognized compensation expense | $ 7.3 |  | $ 7.3 |
Weighted-average period over which remaining compensation expense will be recognized (in years) |  |  | 2 years |

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