LEASES - Components of lease costs (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)
Leases
Option to extend		true
Finance lease cost
Amortization of right-of-use assets	$ 540	$ 1,622
Interest on lease liabilities	319	970
Operating lease cost	1,474	4,399
Total lease costs	$ 2,333	$ 6,991
Maximum
Leases
Lease term	20 years	20 years