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LEASES - Components of lease costs (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Leases        
Option to extend     true  
Finance lease cost        
Amortization of right-of-use assets $ 393 $ 492 $ 1,179 $ 1,477
Interest on lease liabilities 242 306 734 929
Operating lease cost 2,104 1,471 4,709 4,347
Total lease costs $ 2,739 $ 2,269 $ 6,622 $ 6,753
Maximum        
Leases        
Lease term 20 years   20 years