EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Retirement Benefits [Abstract]
Interest cost	$ 1,151	$ 1,570
Expected return on plan assets	(2,586)	(2,583)
Amortization:
Prior service cost	4	4
Recognized actuarial loss	1,042	222
Net periodic expense (income)	$ (389)	$ (787)