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SIGNIFICANT ACCOUNTING POLICIES - Tax Receivable Agreements (Narrative) (Details)	12 Months Ended
	Jun. 30, 2018
Accounting Policies [Abstract]
Estimated amount of tax savings recorded as a liability, as a percentage	85.00%
Term of tax receivable agreement	15 years

X

- Definition

Tax Receivable Agreement, Percentage Recorded as Liabilities

+ References

No definition available.

+ Details

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- Definition

Tax Receivable Agreement, Term of Agreement

+ References

No definition available.

+ Details

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Namespace Prefix:	pinc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration