Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 962	$ 1,170	$ 2,969	$ 3,499
Interest cost	1,715	1,585	5,204	4,739
Expected return on plan assets	(3,309)	(4,168)	(10,021)	(12,467)
Amortization of: Net actuarial (gain) loss	201	373	622	1,105
Amortization of: Prior service cost	252	248	754	745
Net periodic retirement pension (benefit) cost	(179)	(792)	(472)	(2,379)
Contributions paid	434	490	1,933	1,708
Net periodic retirement pension (benefit) cost	(179)	(792)	(472)	(2,379)
Other Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1		1	1
Interest cost	144	150	433	449
Amortization of: Net actuarial (gain) loss	(24)	7	(71)	22
Amortization of: Prior service cost				1
Net periodic retirement pension (benefit) cost	121	157	363	473
Net periodic retirement pension (benefit) cost	121	157	363	473
Contributions paid - other postretirement plans	451	632	1,379	1,610
United States [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	389	433	1,166	1,297
Interest cost	1,320	1,240	3,961	3,718
Expected return on plan assets	(2,713)	(3,536)	(8,140)	(10,608)
Amortization of: Net actuarial (gain) loss	65	136	194	406
Amortization of: Prior service cost	246	242	736	727
Net periodic retirement pension (benefit) cost	(693)	(1,485)	(2,083)	(4,460)
Net periodic retirement pension (benefit) cost	(693)	(1,485)	(2,083)	(4,460)
Other Countries [Member] | Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	573	737	1,803	2,202
Interest cost	395	345	1,243	1,021
Expected return on plan assets	(596)	(632)	(1,881)	(1,859)
Amortization of: Net actuarial (gain) loss	136	237	428	699
Amortization of: Prior service cost	6	6	18	18
Net periodic retirement pension (benefit) cost	514	693	1,611	2,081
Contributions paid	434	490	1,933	1,708
Net periodic retirement pension (benefit) cost	$ 514	$ 693	$ 1,611	$ 2,081