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Share - Based Compensation (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | $ 6,954 | $ 6,913 | $ 6,627
Stock Options and Stock Appreciation Rights [ Member] |  |  |
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | 2,954 | 2,440 | 1,961
Performance Shares [Member] |  |  |
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | 854 | 2,082 | 2,006
Restricted stock and Restricted Stock units [Member] |  |  |
Compensation costs charged to expense under award programs |  |  |
Total compensation costs under award programs | $ 3,146 | $ 2,391 | $ 2,660

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