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EMPLOYEE BENEFIT PLANS - ESTIMATED SUBSIDY PAYMENTS (Details) $ in Thousands | Sep. 30, 2018 USD ($)
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Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract] |
2019 | $ 280
2020 | 316
2021 | 347
2022 | 375
2023 | 417
2024 - 2028 | $ 2,787

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