SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Contract with customer, Liability [Roll Forward]
Deferred revenue, beginning	$ 32,089	$ 30,024
Deferral of revenue	19,334	21,032
Recognition of unearned revenue	(13,925)	(15,735)
Deferred revenue, ending	$ 37,498	$ 35,321