SEGMENT INFORMATION (Long-lived Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jun. 30, 2020
Segment Reporting Information [Line Items]
Long-lived assets	$ 434,704	$ 401,879
United States
Segment Reporting Information [Line Items]
Long-lived assets	154,441	146,633
United Kingdom
Segment Reporting Information [Line Items]
Long-lived assets	167,262	149,943
All Other
Segment Reporting Information [Line Items]
Long-lived assets	$ 113,001	$ 105,303