v3.26.1
Retirement Benefits (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plan Disclosure [Line Items]            
Percentage of annual contribution equal to eligible prior year wages         5.00%  
Common shares issued from treasury to settle benefit obligations   $ 29,813   $ 24,058 $ 29,813 $ 24,912
Treasury Stock [Member]            
Defined Benefit Plan Disclosure [Line Items]            
Common shares issued for benefit plans, shares 0 78,000 0 126,000 78,000 131,000
Common shares issued from treasury to settle benefit obligations         $ 3,525 $ 6,534