EMPLOYEE BENEFIT PLANS - ESTIMATED SUBSIDY PAYMENTS (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Defined Benefit Plan, Expected Future Prescription Drug Subsidy Receipt [Abstract]
2020	$ 261
2021	286
2022	314
2023	350
2024	387
2025 - 2029	$ 2,605

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Amount of prescription drug subsidy receipts expected after fifth fiscal year following latest fiscal year.

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Amount of prescription drug subsidy receipts expected in next fiscal year following latest fiscal year.

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Amount of prescription drug subsidy receipts expected in fifth fiscal year following latest fiscal year.

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Amount of prescription drug subsidy receipts expected in fourth fiscal year following latest fiscal year.

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Amount of prescription drug subsidy receipts expected in third fiscal year following latest fiscal year.

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Amount of prescription drug subsidy receipts expected in second fiscal year following latest fiscal year.

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