Segment Reporting - Additional Information (Detail)	6 Months Ended
Jun. 30, 2025 Segment
Segment Reporting Information [Line Items]
Number of reporting segments	3
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]	President and Chief Executive Officer [Member]
Segment Reporting, CODM, Profit (Loss) Measure, How Used, Description	We evaluate segment performance based on operating results, specifically our CODM analyzes segment revenue and operating expenses which are directly attributable to the cost to serve and educate prospective students, when making decisions to allocate resources based on segment performance.
CTU [Member]
Segment Reporting Information [Line Items]
Students enrolled expressed as percentage of enrollment	69.00%
CTU [Member] \| Fully Online [Member]
Segment Reporting Information [Line Items]
Percentage of enrollment	98.00%
AIUS [Member]
Segment Reporting Information [Line Items]
Students enrolled expressed as percentage of enrollment	23.00%
AIUS [Member] \| Fully Online [Member]
Segment Reporting Information [Line Items]
Percentage of enrollment	98.00%
USAHS [Member]
Segment Reporting Information [Line Items]
Students enrolled expressed as percentage of enrollment	8.00%

Percentage of enrollment.

No definition available.

Name:	prdo_PercentageOfEnrollment
Namespace Prefix:	prdo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of student enrollment for a specific group of the total entity.

+ References

No definition available.

+ Details

Name:	prdo_PercentageOfStudentEnrollment
Namespace Prefix:	prdo_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (a)
-Publisher FASB
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-18

+ Details

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

- Definition

Indicates title and position of individual or name of group identified as chief operating decision maker (CODM) for segment reporting.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 54
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
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-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

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-Section 50
-Paragraph 21
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-21

+ Details

Name:	us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration
Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of how chief operating decision maker (CODM) uses reported segment profit (loss) measure to assess performance and allocate resource.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 47
-Subparagraph (bb)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482785/280-10-55-47

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
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-Name Accounting Standards Codification
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-Subparagraph (c)
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-URI https://asc.fasb.org/1943274/2147482785/280-10-55-54

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-Paragraph 29
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-29

+ Details

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

- Definition

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.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=prdo_CTUMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=prdo_FullyOnlineProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=prdo_AIUSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=prdo_USAHSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: