Retirement Benefits (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
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	$ 24,058	$ 1,050	$ 24,912	$ 22,937
Treasury Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Common shares issued from treasury stock for benefit plans, shares	126,000	21,000	131,000	180,000
Common shares issued from treasury to settle benefit obligations		$ 1,050	$ 6,534	$ 8,971