PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jun. 30, 2019
Property, Plant and Equipment [Line Items]
Cost	$ 735,328	$ 678,869
Accumulated Depreciation	(490,773)	(429,416)
Net	244,555	249,453
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Cost	39,158	40,260
Accumulated Depreciation	(28,473)	(26,492)
Net	10,685	13,768
Office equipment
Property, Plant and Equipment [Line Items]
Cost	2,272	1,993
Accumulated Depreciation	(1,329)	(1,576)
Net	943	417
Computer hardware
Property, Plant and Equipment [Line Items]
Cost	294,745	258,802
Accumulated Depreciation	(198,194)	(177,402)
Net	96,551	81,400
Computer software
Property, Plant and Equipment [Line Items]
Cost	127,299	119,018
Accumulated Depreciation	(103,057)	(87,240)
Net	24,242	31,778
Capitalized software development costs
Property, Plant and Equipment [Line Items]
Cost	111,202	95,729
Accumulated Depreciation	(70,015)	(56,205)
Net	41,187	39,524
Leasehold improvements
Property, Plant and Equipment [Line Items]
Cost	111,384	113,510
Accumulated Depreciation	(74,395)	(66,520)
Net	36,989	46,990
Land and buildings
Property, Plant and Equipment [Line Items]
Cost	49,268	49,557
Accumulated Depreciation	(15,310)	(13,981)
Net	$ 33,958	$ 35,576