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SEGMENTS - Narrative (Details)	3 Months Ended
	Sep. 30, 2019 segment
Segment Reporting [Abstract]
Number of reportable business segments	2
Threshold to classify expenses as non-recurring (period)	2 years
Threshold to classify expenses as non-recurring, not expected to occur within (period)	2 years

X

- Definition

Nonrecurring Expenses, Period Not Expected To Recur

+ References

No definition available.

+ Details

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

X

- Definition

Nonrecurring Expenses, Period Not Incurred

+ References

No definition available.

+ Details

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

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- References

No definition available.

+ Details

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