SEGMENT INFORMATION - Long-lived Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Segment Reporting Information [Line Items]
Long-lived assets	$ 411,786	$ 404,787
United States
Segment Reporting Information [Line Items]
Long-lived assets	155,960	148,950
United Kingdom
Segment Reporting Information [Line Items]
Long-lived assets	148,926	142,973
All Other
Segment Reporting Information [Line Items]
Long-lived assets	$ 106,900	$ 112,864