GOODWILL AND INTANGIBLE ASSETS - Definite Lived Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2024	Dec. 31, 2025
Intangible assets with definite lives
Cost	$ 69,700	$ 69,100
Accumulated Amortization	(36,559)	(41,150)
Net	$ 33,141	27,950
Impairment Of Intangible Asset Finite Lived Statement Of Income Or Comprehensive Income Extensible Enumeration Not Disclosed Flag	impairment charge
Customer lists
Intangible assets with definite lives
Cost	$ 69,700	69,100
Accumulated Amortization	(36,559)	(41,150)
Net	33,141	$ 27,950
Impairment charge	$ 1,400
Customer lists | Weighted Average Amortization Life
Intangible assets with definite lives
Weighted Average Amortization Life	13 years 7 months 6 days	13 years 8 months 12 days
Impaired customer list
Intangible assets with definite lives
Cost	$ 6,400