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Stock-Based Compensation (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2023 | Mar. 31, 2022
Stock Settled Stock Appreciation Rights SARS [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense | $ 0.3 | $ 0.9 | $ 1.7 | $ 2.9
Unrecognized compensation expense | 1.2 |  | $ 1.2 |
Weighted-average period over which remaining compensation expense will be recognized (in years) |  |  | 1 year |
Restricted Stock [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense | 0.4 | 1.3 | $ 3.2 | 3.7
Unrecognized compensation expense | 5.8 |  | $ 5.8 |
Weighted-average period over which remaining compensation expense will be recognized (in years) |  |  | 2 years |
Performance Units [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation expense | 0.9 | $ 0.3 | $ 2.0 | $ 0.8
Unrecognized compensation expense | $ 4.9 |  | $ 4.9 |
Weighted-average period over which remaining compensation expense will be recognized (in years) |  |  | 2 years |

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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