SEGMENT INFORMATION (Long-lived Assets) (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Segment Reporting Information [Line Items]
Long-lived assets	$ 414,728	$ 401,879
United States
Segment Reporting Information [Line Items]
Long-lived assets	150,573	146,633
United Kingdom
Segment Reporting Information [Line Items]
Long-lived assets	156,530	149,943
All Other
Segment Reporting Information [Line Items]
Long-lived assets	$ 107,625	$ 105,303