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OPERATING LEASE RIGHT OF USE ASSETS AND LIABILITIES - Lease Cost (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Weighted-average discount rate 2.33%  
Weighted-average remaining lease term (years) 10 years 10 months 24 days  
Lease expense $ 1,137 $ 954
Short-term and variable lease cost 35 63
ROU asset impairment 0 224
Sublease income (176) (108)
Total lease cost for operating leases $ 996 $ 1,133