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EMPLOYEE BENEFIT PLANS EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Retirement Benefits [Abstract]
Settlement expense	$ (1,548,000)	$ 0	$ (1,548,000)	$ 0
Employer contribution			$ 0

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Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Amount of gain (loss) recognized in net periodic benefit (cost) credit from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk related to obligation and assets used to effect settlement.

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