INVESTMENTS (Details) - USD ($) $ in Thousands		12 Months Ended
	May. 01, 2015	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Schedule of Equity Method Investments [Line Items]
Equity in net income of unconsolidated affiliates		$ 21,285	$ 16,976	$ 11,968
Innovatix
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		50.00%	50.00%
Investments		$ 9,300	$ 6,900
Premier Supply Chain Improvement, Inc | Innovatix
Schedule of Equity Method Investments [Line Items]
Equity method investment, ownership percentage		50.00%
Premier Supply Chain Improvement, Inc | PharmaPoint, LLC
Schedule of Equity Method Investments [Line Items]
Equity method investment, net income (loss)		$ (50)
Premier Supply Chain Improvement, Inc | Other Income, Net | Innovatix
Schedule of Equity Method Investments [Line Items]
Equity in net income of unconsolidated affiliates		21,300	$ 17,000	$ 12,000
Common Class B Unit | Premier Supply Chain Improvement, Inc | PharmaPoint, LLC
Schedule of Equity Method Investments [Line Items]
Common Limited Partners units acquired	5,000,000
Common limited partners units acquired, value	$ 5,000
Subsidiary ownership interest	28.00%
Common Class B Unit | Premier Supply Chain Improvement, Inc | Nations Pharmaceuticals, LLC
Schedule of Equity Method Investments [Line Items]
Subsidiary ownership interest	72.00%
Common Class A Unit | Premier Supply Chain Improvement, Inc | Nations Pharmaceuticals, LLC
Schedule of Equity Method Investments [Line Items]
Common Limited Partners units acquired	13,000,000
Other Assets | Premier Supply Chain Improvement, Inc | PharmaPoint, LLC
Schedule of Equity Method Investments [Line Items]
Fair value of noncontrolling interest		$ 5,000