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Segment Reporting - Summary Financial Information by Reporting Segment (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2024
Dojo [Member] | CTU [Member]
Segment Reporting Information [Line Items]
Acquisition date	Dec. 01, 2022
CalSouthern [Member] | AIUS [Member]
Segment Reporting Information [Line Items]
Acquisition date	Jul. 01, 2022
USAHS [Member] | USAHS [Member]
Segment Reporting Information [Line Items]
Acquisition date	Dec. 02, 2024

X

- Definition

Date when the acquirer obtains control of the acquiree, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 25
-Paragraph 7
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479405/805-10-25-7

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 25
-Paragraph 6
-SubTopic 10
-Topic 805
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479405/805-10-25-6

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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

No definition available.

+ Details

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- Details

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X

- Details

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Namespace Prefix:
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X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=prdo_CaliforniaSouthernUniversityMember
Namespace Prefix:
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X

- Details

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X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=prdo_UniversityOfStAugustineForHealthSciencesLlcMember
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X

- Details

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