Acquisitions (Detail Textual) - USD ($) $ in Thousands		3 Months Ended
	Feb. 01, 2016	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Proceeds from revolver borrowings		$ 164,000	$ 82,500
Goodwill		$ 2,581,948		$ 2,585,343	$ 2,189,816
Customer contracts and related customer relationships
Business Acquisition [Line Items]
Amortization period of acquired intangible assets		14 years
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
Total consideration	547,500
Goodwill	367,322
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