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OPERATING LEASE RIGHT-OF-USE ASSETS AND LIABILITIES - Lease Costs (Details)
$ in Thousands
12 Months Ended
Sep. 30, 2020
USD ($)
Leases [Abstract]  
Weighted-average discount rate 2.35%
Weighted-average remaining lease term (years) 11 years 4 months 20 days
Lease expense $ 3,454
Short-term and variable lease cost 496
Sublease income (733)
Total lease cost for operating leases $ 3,217