Business Combinations (Narrative) (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 04, 2016	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016	Apr. 03, 2016
Business Combinations [Line Items]
Amortization of intangible assets		$ 46,400
Interest expense		28,355	$ 28,236	$ 11,206
Acquisition related expenses			10,076
Income tax expense (benefit)		$ 205,724	$ 76,459	$ 87,157
U.S. Federal income tax rate		28.00%	35.00%	35.00%
Brightree LLC [Member]
Business Combinations [Line Items]
Date of acquisition agreement				Apr. 04, 2016
Total purchase price of acquisition	$ 802,000
Brightree LLC [Member] | Revolving Credit Facility [Member]
Business Combinations [Line Items]
Maximum borrowing capacity	1,000,000				$ 700,000
Brightree LLC [Member] | Term Credit Agreement [Member]
Business Combinations [Line Items]
Maximum borrowing capacity	$ 300,000
Credit facility term, years	1 year
Conduit [Member]
Business Combinations [Line Items]
Date of acquisition agreement			May 31, 2017
AllCall [Member]
Business Combinations [Line Items]
Date of acquisition agreement			Jun. 30, 2017
Conduit And AllCall [Member]
Business Combinations [Line Items]
Acquisition related expenses			$ 0