LEASES - Additional information related to leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 1,512	$ 1,375	$ 3,008	$ 2,800
Operating cash flows from finance leases	245	311	492	623
Financing cash flows from finance leases	304	$ 419	605	$ 838
Right-of-use assets obtained in exchange for operating lease liabilities	$ 346		$ 1,247
Weighted-average remaining lease term
Operating leases	9 years 10 months 24 days	5 years 9 months 18 days	9 years 10 months 24 days	5 years 9 months 18 days
Finance leases	12 years 6 months	12 years 2 months 12 days	12 years 6 months	12 years 2 months 12 days
Weighted-average discount rate
Operating leases	3.12%	3.11%	3.12%	3.11%
Finance leases	4.58%	4.31%	4.58%	4.31%