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Share - Based Compensation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | $ 8,980 | $ 6,954 | $ 6,913
Stock Options and Stock Appreciation Rights [ Member] |  |  |
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | 2,526 | 2,954 | 2,440
Performance Shares [Member] |  |  |
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | 2,494 | 854 | 2,082
Restricted stock and Restricted Stock units [Member] |  |  |
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | $ 3,960 | $ 3,146 | $ 2,391

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