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EMPLOYEE BENEFIT PLANS - ESTIMATED SUBSIDY PAYMENTS (Details) $ in Thousands | Sep. 30, 2017 USD ($)
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Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract] |
2018 | $ 262
2019 | 283
2020 | 311
2021 | 342
2022 | 373
2023 - 2027 | $ 2,574

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