Retirement Benefits (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Jun. 30, 2023
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	$ 1,050	$ 22,937	$ 19,467
Treasury Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Common shares issued from treasury stock for benefit plans, shares	21	180	189
Common shares issued from treasury to settle benefit obligations	$ 1,050	$ 8,971	$ 8,524