BUSINESS ACQUISITIONS - Schedule of Preliminary Fair Values Assigned to Net Assets Acquired and Liabilities Assumed (Details) - USD ($)			3 Months Ended	9 Months Ended
	Jan. 10, 2017	Dec. 02, 2016	Mar. 31, 2017	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Business Acquisition [Line Items]
Receivable from GNYHA Holdings, LLC		$ (3,000,000.0)
Net consideration				$ 0	$ 398,261,000
Revenue share obligations			$ 70,396,000	70,396,000		$ 63,603,000
Goodwill			865,445,000	$ 865,445,000		$ 537,962,000
Innovatix and Essensa
Business Acquisition [Line Items]
Cash paid at closing		227,500,000
Cash paid on January 10, 2017	$ 97,500,000	97,500,000
Purchase price		325,000,000
Additional cash paid at closing		10,984,000
Adjusted purchase price		335,984,000
Earn-out liability		16,662,000	$ 18,500,000
Receivable from GNYHA Holdings, LLC		(3,000,000)
Estimated working capital settlement		1,106,000
Total consideration paid		350,752,000
Cash acquired		(16,267,000)
Net consideration		334,485,000
50% ownership interest in Innovatix		218,044,000
Payable to Innovatix and Essensa		(5,765,000)
Enterprise value		546,764,000
Accounts receivable		22,261,000
Prepaid expenses and other current assets		686,000
Fixed assets, net		2,064,000
Intangible assets		242,906,000
Total assets acquired		267,917,000
Accrued expenses		5,264,000
Revenue share obligations		6,937,000
Other current liabilities		694,000
Total liabilities assumed		12,895,000
Goodwill		$ 291,742,000