The adjusted net worth to total assets ratio actual.

No definition available.

Name:	pfsi_AdjustedNetWorthTotalAssetsRatioActual
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The adjusted net worth to total assets ratio requirement.

+ References

No definition available.

+ Details

Name:	pfsi_AdjustedNetWorthTotalAssetsRatioRequirement
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The liquidity requirement additional spread of the total non-performing unpaid principal balance excluded.

+ References

No definition available.

+ Details

Name:	pfsi_FederalHousingFinanceAgencyLiquidityRequirementAdditionalSpreadOfTotalNonPerformingUnpaidPrincipalBalanceExcluded
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The liquidity requirement additional spread of the total non-performing unpaid principal balance in excess of 6.0% or 4.0%.

+ References

No definition available.

+ Details

Name:	pfsi_FederalHousingFinanceAgencyLiquidityRequirementAdditionalSpreadOfTotalNonPerformingUnpaidPrincipalBalanceInExcessOfSixPercent
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The liquidity requirement spread of the aggregate unpaid principal balance serviced, required by the Federal Housing Finance Agency.

+ References

No definition available.

+ Details

Name:	pfsi_FederalHousingFinanceAgencyLiquidityRequirementSpreadOfAggregateUnpaidPrincipalBalanceServiced
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The eligibility requirement spread added to the net worth requirement, as a percent of the Company's total servicing portfolio, required by the Federal Housing Finance Agency.

+ References

No definition available.

+ Details

Name:	pfsi_FederalHousingFinanceAgencyNetWorthRequirementSpreadAsPercentOfCompanySServicingPortfolio
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of total liquidity as defined in the regulations.

+ References

No definition available.

+ Details

Name:	pfsi_Liquidity
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The lowest amount of liquidity required by secondary market investors or state-imposed regulatory mandates.

+ References

No definition available.

+ Details

Name:	pfsi_MinimumLiquidityRequiredForCompliance
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The tangible net worth to total assets ratio actual.

+ References

No definition available.

+ Details

Name:	pfsi_TangibleNetWorthTotalAssetsRatioActual
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The tangible net worth to total assets ratio requirement.

+ References

No definition available.

+ Details

Name:	pfsi_TangibleNetWorthTotalAssetsRatioRequirement
Namespace Prefix:	pfsi_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of total capital as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

+ Details

Name:	us-gaap_Capital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Amount of minimum net worth required for mortgage banking as defined by regulatory framework.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)(1)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

+ Details

Name:	us-gaap_MinimumNetWorthRequiredForCompliance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_RegulatoryCapitalRequirementsForMortgageCompaniesBySecondaryMarketInvestorAxis=pfsi_FannieMaeFreddieMacMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryCapitalRequirementsForMortgageCompaniesBySecondaryMarketInvestorAxis=pfsi_GovernmentNationalMortgageAssociationIssuerPLSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryCapitalRequirementsForMortgageCompaniesBySecondaryMarketInvestorAxis=pfsi_GovernmentNationalMortgageAssociationIssuersParentPNMACMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancialInstrumentAxis=pfsi_OneToFourUnitServicingPortfolioMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryCapitalRequirementsForMortgageCompaniesBySecondaryMarketInvestorAxis=pfsi_USDepartmentOfHousingAndUrbanDevelopmentPLSMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryCapitalRequirementsForMortgageCompaniesBySecondaryMarketInvestorAxis=pfsi_FederalHousingFinanceAgencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Regulatory Capital and Liquidity Requirements (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Jun. 30, 2020	Mar. 31, 2023	Dec. 31, 2015	Dec. 31, 2022
Fannie Mae / Freddie Mac - PLS
Regulatory Net Worth and Agency Capital Requirements
Net worth		$ 6,643,680		$ 6,632,627
Capital Requirement		822,461		797,748
Liquidity		1,467,833		1,265,569
Liquidity requirement		$ 110,397		$ 107,768
Tangible net worth / Total assets ratio actual		32.00%		39.00%
Tangible net worth / Total assets ratio requirement		6.00%		6.00%
Ginnie Mae - Issuer - PLS
Regulatory Net Worth and Agency Capital Requirements
Net worth		$ 5,800,487		$ 5,899,892
Capital Requirement		930,046		923,202
Liquidity		1,467,833		1,265,569
Liquidity requirement		$ 251,654		$ 246,953
Adjusted net worth / Total assets ratio actual		28.00%		35.00%
Adjusted net worth / Total assets ratio requirement		6.00%		6.00%
Ginnie Mae - Issuer's parent - PennyMac \| 1-4 unit servicing portfolio
Regulatory Net Worth and Agency Capital Requirements
Net worth		$ 2,500
FHFA net worth requirement spread		0.35%
FHFA liquidity spread of UPB serviced		0.10%
Liquidity requirement		$ 1,000
HUD - PLS
Regulatory Net Worth and Agency Capital Requirements
Net worth		5,800,487		$ 5,899,892
Capital Requirement		$ 2,500		$ 2,500
Federal Housing Finance Agency
Regulatory Net Worth and Agency Capital Requirements
Net worth			$ 2,500
FHFA liquidity spread of UPB serviced	0.035%
FHFA additional liquidity spread of UPB in excess of set percent	2.00%
FHFA additional liquidity spread of UPB excluded	70.00%
Federal Housing Finance Agency \| 1-4 unit servicing portfolio
Regulatory Net Worth and Agency Capital Requirements
FHFA net worth requirement spread			0.25%