LEASES - Additional information related to leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 1,792	$ 1,485	$ 5,172	$ 4,521
Operating cash flows from finance leases	230	242	698	753
Financing cash flows from finance leases	334	307	991	971
Right-of-use assets obtained in exchange for operating lease liabilities
Operating leases	$ 402	$ 566	$ 14,984	$ 1,813
Weighted-average remaining lease term:
Operating leases	11 years 4 months 24 days	9 years 8 months 12 days	11 years 4 months 24 days	9 years 8 months 12 days
Finance leases	11 years 3 months 18 days	12 years	11 years 3 months 18 days	12 years
Weighted-average discount rate:
Operating leases	4.42%	3.12%	4.42%	3.12%
Finance leases	4.62%	4.59%	4.62%	4.59%