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Stock-Based Compensation (Restricted Stock Activity) (Details) - Restricted Stock [Member]
shares in Thousands
12 Months Ended
Jun. 30, 2021
$ / shares
shares
Number of Shares  
Number of Shares, Unvested restricted stock at beginning of year | shares 69
Number of Shares, Granted | shares 21
Number of Shares, Vested | shares (25)
Number of Shares, Forfeited | shares (3)
Number of Shares, Unvested restricted stock at end of year | shares 62
Weighted Average Remaining Contractual Life in Years  
Weighted Average Grant Date Fair Value, Unvested restricted stock at beginning of year | $ / shares $ 144.27
Weighted Average Grant Date Fair Value, Granted | $ / shares 176.82
Weighted Average Grant Date Fair Value, Vested | $ / shares 128.03
Weighted Average Grant Date Fair Value, Forfeited | $ / shares 142.45
Weighted Average Grant Date Fair Value, Unvested restricted stock at end of year | $ / shares $ 161.35