LEASES - Lease Position (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Oct. 01, 2019
Leases [Abstract]
Operating lease commitments, including probable extensions	$ 48,695	$ 62,218
Discounted using the lessee's incremental borrowing rate at the date of initial application	46,706	57,323
(Less): short-term leases recognized on a straight-line basis as expense	(1,456)	(1,252)
Lease liability recognized	45,250	56,071
Current lease liabilities	11,364	16,277
Non-current lease liabilities	$ 33,886	$ 39,794