LEASES - Components of lease costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Leases
Option to extend			true
Finance lease cost
Amortization of right-of-use assets	$ 607	$ 492	$ 1,214	$ 985
Interest on lease liabilities	291	311	593	623
Operating lease cost	1,578	1,424	3,131	2,877
Total lease costs	$ 2,476	$ 2,227	$ 4,938	$ 4,485
Maximum
Leases
Lease term	20 years		20 years