EMPLOYEE BENEFIT PLANS (Details) - Weighted-average assumptions used in determining the net periodic benefit costs	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Pension Plan [Member]
EMPLOYEE BENEFIT PLANS (Details) - Weighted-average assumptions used in determining the net periodic benefit costs [Line Items]
Discount rate	4.10%	3.64%	3.42%
Expected return on assets	7.00%	7.25%	7.50%
Supplemental Employee Retirement Plan [Member]
EMPLOYEE BENEFIT PLANS (Details) - Weighted-average assumptions used in determining the net periodic benefit costs [Line Items]
Discount rate	3.99%	3.18%	2.86%
Expected return on assets	0.00%	0.00%	0.00%