Revenue Recognition - Additional Information (Detail) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Revenue Recognition [Line Items]
Revenue recognized estimated reserve based on historical evidence	$ 2.0	$ 2.0

A liability established for situations in which a student withdraws from an institutions and revenue needs to be reversed, based on historical evidence for similar situations.

No definition available.

Name:	prdo_RefundLiabilityReserve
Namespace Prefix:	prdo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant