EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Interest cost	$ 744	$ 1,151
Expected return on plan assets	(2,544)	(2,586)
Amortization:
Prior service cost	0	4
Recognized actuarial loss	1,573	1,042
Net periodic expense (income)	$ (227)	$ (389)