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Consolidated Statements Of Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Statement of Stockholders' Equity [Abstract] |  |  |
Tax effect included in net pension and postretirement benefit (losses) gains | $ (536) | $ (625) | $ 829
Common stock, dividends per share (in dollars per share) | $ 2.75 | $ 2.55 | $ 2.35

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