Acquisitions (Detail Textual) - USD ($) $ in Thousands		9 Months Ended
	Feb. 01, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Proceeds from revolver borrowings		$ 373,500	$ 844,000
Goodwill		$ 2,573,400		$ 2,585,343	$ 2,189,816
Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization period of acquired intangible assets		14 years 1 month 6 days
Revolving Credit Facility
Business Acquisition [Line Items]
Proceeds from revolver borrowings	$ 250,000
Term loans
Business Acquisition [Line Items]
Proceeds from term loan borrowings	$ 300,000
NSS Acquisition
Business Acquisition [Line Items]
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
Measurement period adjustments, other current assets		$ 2,400
Measurement period adjustments, receivables		600
Measurement period adjustments, other accrued expenses		900
Measurement period adjustments, purchase consideration		5,500
Measurement period adjustments, goodwill		$ 7,500
Business purchase consideration	541,900
Goodwill	360,230
Amount of tax deductible goodwill and intangibles	$ 47,700
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