ACQUISITIONS (Detail Textual 1) - USD ($) $ in Thousands			12 Months Ended
	Oct. 01, 2016	Feb. 01, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Proceeds from revolver borrowings			$ 477,000	$ 485,500	$ 1,058,500
Goodwill			$ 2,620,835	$ 2,577,435	2,585,343
Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization period of acquired intangible assets			14 years 8 months 12 days
Business in United Kingdom
Business Acquisition [Line Items]
Purchase consideration	$ 2,800
NSS Acquisition
Business Acquisition [Line Items]
Purchase consideration		$ 541,900
Percentage of outstanding shares acquired		100.00%
Cash consideration		$ 550,000
Consideration, initial net working capital payment		11,200
Consideration, net working capital refund received		13,600
Consideration, refund for tax-related adjustments		5,700
Goodwill		360,230
Amount of tax deductible goodwill and intangibles		$ 47,700
Goodwill impairment expense					$ 476,200	$ 158,700
NSS Acquisition | Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization period of acquired intangible assets		15 years
NSS Acquisition | Revolving Credit Facility
Business Acquisition [Line Items]
Proceeds from revolver borrowings		$ 250,000
NSS Acquisition | Term loans
Business Acquisition [Line Items]
Proceeds from term loan borrowings		$ 300,000