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Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 577 $ 503
Interest cost 2,447 2,692
Expected return on plan assets (3,362) (2,863)
Amortization of: Net actuarial loss (gain) (57) (111)
Amortization of: Prior service cost 197 180
Net periodic retirement pension (benefit) cost (198) 401
Contributions paid 384 593
Other Postretirement Benefit Plans [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Interest cost 179 226
Amortization of: Net actuarial loss (gain) (110) (139)
Net periodic retirement pension (benefit) cost 69 87
Contributions paid - other postretirement plans 386 412
United States [Member] | Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 229 194
Interest cost 1,719 1,899
Expected return on plan assets (2,748) (2,271)
Amortization of: Net actuarial loss (gain) 43 57
Amortization of: Prior service cost 191 174
Net periodic retirement pension (benefit) cost (566) 53
Other Countries [Member] | Pension Plan [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 348 309
Interest cost 728 793
Expected return on plan assets (614) (592)
Amortization of: Net actuarial loss (gain) (100) (168)
Amortization of: Prior service cost 6 6
Net periodic retirement pension (benefit) cost 368 348
Contributions paid $ 384 $ 593