Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 500	$ 567	$ 1,509	$ 1,666
Interest cost	2,698	2,629	8,093	7,806
Expected return on plan assets	(2,867)	(2,660)	(8,603)	(7,933)
Amortization of: Net actuarial loss (gain)	(111)	(88)	(337)	(243)
Amortization of: Prior service cost	180	179	540	539
Net periodic retirement pension cost	400	627	1,202	1,835
Contributions paid	315	470	1,654	1,763
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		1		1
Interest cost	226	226	677	678
Amortization of: Net actuarial loss (gain)	(139)	(124)	(417)	(372)
Net periodic retirement pension cost	87	103	260	307
Contributions paid - other postretirement plans	409	415	1,234	1,300
United States [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	193	223	581	670
Interest cost	1,899	1,824	5,698	5,473
Expected return on plan assets	(2,271)	(2,074)	(6,813)	(6,223)
Amortization of: Net actuarial loss (gain)	57	73	170	219
Amortization of: Prior service cost	174	174	523	523
Net periodic retirement pension cost	52	220	159	662
Contributions paid
Other Countries [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	307	344	928	996
Interest cost	799	805	2,395	2,333
Expected return on plan assets	(596)	(586)	(1,790)	(1,710)
Amortization of: Net actuarial loss (gain)	(168)	(161)	(507)	(462)
Amortization of: Prior service cost	6	5	17	16
Net periodic retirement pension cost	348	407	1,043	1,173
Contributions paid	$ 315	$ 470	$ 1,654	$ 1,763