PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Property, Plant and Equipment [Line Items]
Cost	$ 719,360	$ 735,328
Accumulated Depreciation	(483,862)	(490,773)
Net	235,498	244,555
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Cost	39,375	39,158
Accumulated Depreciation	(29,711)	(28,473)
Net	9,664	10,685
Office equipment
Property, Plant and Equipment [Line Items]
Cost	2,214	2,272
Accumulated Depreciation	(1,217)	(1,329)
Net	997	943
Computer hardware
Property, Plant and Equipment [Line Items]
Cost	291,305	294,745
Accumulated Depreciation	(197,784)	(198,194)
Net	93,521	96,551
Computer software
Property, Plant and Equipment [Line Items]
Cost	117,374	127,299
Accumulated Depreciation	(93,700)	(103,057)
Net	23,674	24,242
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Cost	114,942	111,202
Accumulated Depreciation	(73,865)	(70,015)
Net	41,077	41,187
Leasehold improvements
Property, Plant and Equipment [Line Items]
Cost	105,944	111,384
Accumulated Depreciation	(73,031)	(74,395)
Net	32,913	36,989
Land and buildings
Property, Plant and Equipment [Line Items]
Cost	48,206	49,268
Accumulated Depreciation	(14,554)	(15,310)
Net	$ 33,652	$ 33,958