EMPLOYEE BENEFIT PLANS (Details) - Schedule of net periodic costs - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Amortization of:
Total net periodic (benefits) costs	$ (1,559)	$ (3,148)	$ (3,649)
Supplemental Employee Retirement Plan
Net periodic (benefits) costs:
Interest cost	335	503	544
Expected return on plan assets	0	0	0
Amortization of:
Prior service costs	14	14	14
Actuarial loss	399	258	628
Total net periodic (benefits) costs	748	775	1,186
Pension Plan
Net periodic (benefits) costs:
Interest cost	4,267	5,778	5,084
Expected return on plan assets	(10,343)	(10,331)	(10,736)
Amortization of:
Prior service costs	0	0	0
Actuarial loss	3,769	630	755
Total net periodic (benefits) costs	$ (2,307)	$ (3,923)	$ (4,897)