Acquisitions (Detail Textual) - USD ($) $ in Thousands			6 Months Ended
	Oct. 01, 2016	Feb. 01, 2016	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Business Acquisition [Line Items]
Proceeds from revolver borrowings			$ 240,500	$ 154,488
Goodwill			$ 2,571,297		$ 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, expected refund for tax-related adjustments		5,700
Measurement period adjustments, other current assets			$ 2,600
Measurement period adjustments, receivables			1,200
Measurement period adjustments, other accrued expenses			600
Measurement period adjustments, purchase consideration			5,500
Measurement period adjustments, goodwill			$ 8,600
Business purchase consideration		541,900
Goodwill		359,088
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
Business in United Kingdom
Business Acquisition [Line Items]
Business purchase consideration	$ 2,800