v3.26.1
Summary Of Significant Accounting Policies (Schedule Of Basic And Diluted Net Income Per Common Share Calculations) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Accounting Policies [Abstract]      
Net income $ 191,606 $ 167,347 $ 158,613
Net income available to participating securities (374) (455) (413)
Net income available to common shareholders $ 191,232 $ 166,892 $ 158,200
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Weighted average common shares outstanding - basic (in shares) 27,385 27,469 27,440
Weighted average common shares outstanding - diluted (in shares) 27,406 27,489 27,461
Net income per common share - basic (in dollars per share) $ 6.98 $ 6.08 $ 5.77
Net income per common share - diluted (in dollars per share) $ 6.98 $ 6.07 $ 5.76
Nonparticipating Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental share effect from awards with forfeitable dividends (in shares) 1 3 2
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental share effect from awards with forfeitable dividends (in shares) 8 0 0
Stock Settled Stock Appreciation Rights SARS [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental share effect from stock-settled stock appreciation rights (in shares) 0 1 6
Performance Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Incremental share effect from awards with forfeitable dividends (in shares) 12 16 13