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PENSION AND OTHER POSTRETIREMENT PLANS - Benefit Payments Expected to be Paid (Details) $ in Thousands | Sep. 30, 2017 USD ($)
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Pension |
Defined Benefit Plan Disclosure [Line Items] |
2018 | $ 10,137
2019 | 10,586
2020 | 10,983
2021 | 11,447
2022 | 12,811
2023-2027 | 72,463
Total | 128,427
Other Postretirement |
Defined Benefit Plan Disclosure [Line Items] |
2018 | 1,044
2019 | 1,072
2020 | 1,013
2021 | 1,044
2022 | 1,094
2023-2027 | 6,004
Total | $ 11,271

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