LEASES - Additional information related to leases (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 1,989	$ 1,320	$ 4,502	$ 4,102
Operating cash flows from finance leases	242	306	734	915
Financing cash flows from finance leases	307	428	911	1,261
Right-of-use assets obtained in exchange for operating lease liabilities	$ 760	$ 12,780	$ 1,813	$ 12,780
Weighted-average remaining lease term
Operating leases	9 years 9 months 18 days	10 years 3 months 18 days	9 years 9 months 18 days	10 years 3 months 18 days
Finance leases	12 years 3 months 18 days	11 years 10 months 24 days	12 years 3 months 18 days	11 years 10 months 24 days
Weighted-average discount rate
Operating leases	3.11%	3.12%	3.11%	3.12%
Finance leases	4.59%	4.31%	4.59%	4.31%