SEGMENTS - Schedule of Reconciliation of Net Revenue and EBITDA (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Net revenue	$ 262,857	$ 261,382	$ 240,266	$ 248,142	$ 300,246	$ 286,866	$ 279,871	$ 269,026	$ 1,012,647	$ 1,136,009	$ 1,095,337
Operating Segments \| Supply Chain Services
Segment Reporting Information [Line Items]
Net revenue									631,039	689,368	666,761
Operating Segments \| Performance Services
Segment Reporting Information [Line Items]
Net revenue									381,608	446,641	428,576
Net administrative fees \| Operating Segments \| Supply Chain Services
Segment Reporting Information [Line Items]
Net revenue									556,328	624,168	615,040
Software licenses, other services and support
Segment Reporting Information [Line Items]
Net revenue									456,319	511,841	480,297
Software licenses, other services and support \| Operating Segments \| Supply Chain Services
Segment Reporting Information [Line Items]
Net revenue									74,711	65,200	51,721
SaaS-based products subscriptions \| Operating Segments \| Performance Services
Segment Reporting Information [Line Items]
Net revenue									155,458	179,601	187,618
Consulting services \| Operating Segments \| Performance Services
Segment Reporting Information [Line Items]
Net revenue									68,237	92,560	80,292
Software licenses \| Operating Segments \| Performance Services
Segment Reporting Information [Line Items]
Net revenue									86,731	82,073	72,060
Other investments \| Operating Segments \| Performance Services
Segment Reporting Information [Line Items]
Net revenue									$ 71,182	$ 92,407	$ 88,606