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v3.23.1

Contingencies - Additional Information (Detail) - USD ($) $ in Millions |  | 3 Months Ended |
--- | --- | --- | ---
Dec. 01, 2022 | Mar. 31, 2023 | Dec. 31, 2022
Loss Contingencies [Line Items] |  |  |
Contingent consideration year of expected payment year and month one |  | 2024-01 |
Contingent consideration year of expected payment year and month two |  | 2025-01 |
Dojo [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Aggregate fair value amount | $ 12.7 | $ 12.7 |
Contingent Consideration [Member] | Dojo [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Contingent consideration payment | $ 15.0 | 15.0 |
Other Accrued Expenses [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Accrual for legal fees |  | $ 4.9 | $ 1.7

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- Definition The acquisition date fair value calculation of contingent consideration in a business combination. + References No definition available. + Details
Name: | prdo_ContingentConsiderationFairValue
Namespace Prefix: | prdo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contingent consideration year of expected payment year and month one. + References No definition available. + Details
Name: | prdo_ContingentConsiderationYearOfExpectedPaymentYearAndMonthOne
Namespace Prefix: | prdo_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

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- Definition Contingent consideration year of expected payment year and month two. + References No definition available. + Details
Name: | prdo_ContingentConsiderationYearOfExpectedPaymentYearAndMonthTwo
Namespace Prefix: | prdo_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI https://asc.fasb.org/extlink&oid=126975305&loc=d3e6927-128479 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 10 -URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14615-108349 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_BusinessAcquisitionAxis=prdo_CodingDojoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ContingentConsiderationByTypeAxis=prdo_ContingentConsiderationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BalanceSheetLocationAxis=prdo_OtherAccruedExpensesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |