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Retirement Benefits (Schedule of Expected Benefit Payments) (Details) - Defined Benefit Pension Plan [Member] $ in Thousands | Sep. 30, 2017 USD ($)
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Defined Benefit Plan Disclosure [Line Items] |
2018 | $ 8,476
2019 | 9,489
2020 | 9,704
2021 | 10,461
2022 | 10,781
2023 - 2027 | 60,877
UNITED STATES |
Defined Benefit Plan Disclosure [Line Items] |
2018 | 6,251
2019 | 6,911
2020 | 7,521
2021 | 8,065
2022 | 8,524
2023 - 2027 | 48,075
Foreign Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
2018 | 2,225
2019 | 2,578
2020 | 2,183
2021 | 2,396
2022 | 2,257
2023 - 2027 | $ 12,802

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