LEASES - Additional information related to leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	$ 1,824	$ 1,779	$ 3,643	$ 3,380
Operating cash flows from finance leases	216	233	439	469
Financing cash flows from finance leases	328	330	683	658
Right-of-use assets obtained in exchange for operating lease liabilities
Operating leases	$ 1,679	$ 618	$ 1,679	$ 14,582
Weighted-average remaining lease term:
Operating leases	10 years 9 months 18 days	11 years 6 months	10 years 9 months 18 days	11 years 6 months
Finance leases	11 years 1 month 6 days	11 years 6 months	11 years 1 month 6 days	11 years 6 months
Weighted-average discount rate:
Operating leases	4.55%	4.40%	4.55%	4.40%
Finance leases	4.68%	4.61%	4.68%	4.61%