Acquisitions - Acquisition of ANXe Business Corporation (Details) - USD ($) $ in Thousands	May 01, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Purchase Price Allocation
Goodwill		$ 3,580,129	$ 3,416,749	$ 2,325,586
ANXeBusiness Corp.
Business Acquisition [Line Items]
Purchase consideration	$ 104,400
Purchase Price Allocation
Current assets	9,712
Non-current tangible assets	511
Liabilities assumed	(26,204)
Total identifiable net assets	39,319
Goodwill	65,108
Net assets acquired	104,427
Goodwill expected to be tax deductible	7,000
Acquired receivables, fair value	5,700
Acquired receivables, gross contractual amount	5,800
Acquired receivables, estimated uncollectible	100
ANXeBusiness Corp. | Customer Assets
Purchase Price Allocation
Acquired intangible assets	49,700
ANXeBusiness Corp. | Technology Assets
Purchase Price Allocation
Acquired intangible assets	$ 5,600