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Amount of revenue from providing administrative services, including, but not limited to, accounting, tax, legal, regulatory filing, and share registration activities of managed funds and investment accounts of independent third parties and related and affiliated entities.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

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The aggregate amount of receivables to be collected from related parties where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth, at the financial statement date. which are usually due within one year (or one business cycle).

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

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RELATED PARTY TRANSACTIONS (Details) - USD ($)		3 Months Ended		9 Months Ended
RELATED PARTY TRANSACTIONS (Details) - USD ($)	Jul. 26, 2016	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Dec. 02, 2016	Dec. 01, 2016	Jun. 30, 2016
Related Party Transaction [Line Items]
Revenue share obligations		$ 70,396,000		$ 70,396,000				$ 63,603,000
Limited partners' distribution payable		23,071,000		23,071,000				22,493,000
Due from related parties		5,388,000		5,388,000				3,123,000
Share of Innovatix's net income		83,000	$ 6,627,000	14,789,000	$ 16,002,000
Net administrative fees revenue recorded from purchases under agreements		143,915,000	131,270,000	398,962,000	369,952,000
Innovatix
Related Party Transaction [Line Items]
Share of Innovatix's net income		0	6,735,000	10,743,000	15,992,000
FFF Enterprises, Inc.
Related Party Transaction [Line Items]
Share of Innovatix's net income		217,000	0	4,394,000	0
GYNHA
Related Party Transaction [Line Items]
Revenue share obligations		7,200,000		7,200,000				7,600,000
Limited partners' distribution payable		2,400,000		2,400,000				2,900,000
GYNHA \| Administrative Fee Revenue
Related Party Transaction [Line Items]
Revenue share obligations								200,000
Innovatix
Related Party Transaction [Line Items]
Revenue share obligations								4,200,000
Essensa \| Administrative Fee Revenue
Related Party Transaction [Line Items]
Net administrative fees revenue			700,000	1,200,000	2,000,000
AEIX
Related Party Transaction [Line Items]
Maximum annual incentive management fee		500,000		500,000
AEIX \| Administrative Fee Revenue
Related Party Transaction [Line Items]
Net administrative fees revenue				200,000	100,000.0
Due from related parties		800,000		800,000				500,000
AEIX \| Cost Reimbursement
Related Party Transaction [Line Items]
Net administrative fees revenue		$ 1,300,000	1,100,000	$ 3,500,000	3,200,000
Premier LP \| GYNHA
Related Party Transaction [Line Items]
Ownership of outstanding partnership interests (as a percent)		9.00%		9.00%
Premier LP \| GYNHA \| Administrative Fee Revenue
Related Party Transaction [Line Items]
Net administrative fees revenue		$ 16,900,000	17,000,000	$ 51,800,000	49,200,000
Due from related parties		4,200,000		4,200,000				$ 2,600,000
Premier LP \| GYNHA \| Services and Support Revenue
Related Party Transaction [Line Items]
Net administrative fees revenue		3,900,000	3,600,000	11,000,000	10,000,000
Premier LP \| GYNHA \| Product Revenue
Related Party Transaction [Line Items]
Net administrative fees revenue		4,300,000	4,400,000	$ 12,300,000	15,200,000
Premier LP \| Member Owners
Related Party Transaction [Line Items]
Revenue share of gross administrative fees (as a percent)				30.00%
Premier Supply Chain Improvement, Inc \| Innovatix
Related Party Transaction [Line Items]
Share of Innovatix's net income			6,700,000	$ 10,700,000	16,000,000
Premier Supply Chain Improvement, Inc \| FFF Enterprises, Inc.
Related Party Transaction [Line Items]
Share of Innovatix's net income		200,000		4,400,000
Ownership share of net income of FFF (as a percent)	49.00%
Net administrative fees revenue recorded from purchases under agreements		$ 1,400,000		3,000,000
Premier Healthcare Solutions, Inc. \| Innovatix
Related Party Transaction [Line Items]
Net administrative fees revenue			$ 12,100,000	$ 19,900,000	$ 31,800,000
Innovatix
Related Party Transaction [Line Items]
Membership interest prior to acquisition (as a percent)							50.00%
Remaining membership interest acquired (as a percent)						50.00%
Essensa
Related Party Transaction [Line Items]
Remaining membership interest acquired (as a percent)						100.00%