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Retirement Plans (Contributions Expected To Be Paid In The Next Fiscal Year And The Projected Benefit Payments) (Details)
$ in Thousands
Sep. 30, 2018
USD ($)
Supplemental Employee Retirement Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated net contributions during fiscal 2018 $ 5,038
Defined Benefit Pension Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 17,077
2019 17,721
2020 18,376
2021 19,206
2022 20,438
2023-2027 121,677
Postretirement Health Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Estimated net contributions during fiscal 2018 1,382
2018 1,382
2019 1,430
2020 1,526
2021 1,569
2022 1,581
2023-2027 $ 8,169