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Property and Equipment - Schedule of Cost Basis and Estimated Useful Lives of Property and Equipment (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($)
USAHS [Member]
Property, Plant and Equipment [Line Items]
Construction in progress related to BTS transaction	$ 45.2

X

- Definition

The value of CIP related to build to suit arrangement with a landlord.

+ References

No definition available.

+ Details

Name:	prdo_BuildToSuitConstructionInProgress
Namespace Prefix:	prdo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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

X

- Details

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