Retirement Benefits (Narrative) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 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	$ 21,887	$ 19,307	$ 21,887	$ 19,467
Treasury Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Common shares issued from treasury stock for benefit plans, shares	159	187	159	189
Common shares issued from treasury to settle benefit obligations	$ 7,921	$ 8,447	$ 7,921	$ 8,524