Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 503	$ 543
Interest cost	2,692	2,574
Expected return on plan assets	(2,863)	(2,625)
Amortization of: Net actuarial loss (gain)	(111)	(75)
Amortization of: Prior service cost	180	179
Net periodic retirement pension cost	401	596
Contributions paid	593	562
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Interest cost	226	226
Amortization of: Net actuarial loss (gain)	(139)	(124)
Net periodic retirement pension cost	87	102
Contributions paid - other postretirement plans	412	441
United States [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	194	223
Interest cost	1,899	1,824
Expected return on plan assets	(2,271)	(2,074)
Amortization of: Net actuarial loss (gain)	57	73
Amortization of: Prior service cost	174	174
Net periodic retirement pension cost	53	220
Other Countries [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	309	320
Interest cost	793	750
Expected return on plan assets	(592)	(551)
Amortization of: Net actuarial loss (gain)	(168)	(148)
Amortization of: Prior service cost	6	5
Net periodic retirement pension cost	348	376
Contributions paid	$ 593	$ 562