Name:	pfsi_CustodialBalances
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Not available.

No definition available.

Name:	pfsi_DelinquentMortgageLoansInPortfolioAbstract
Namespace Prefix:	pfsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	pfsi_MortgageServicingPortfolioAbstract
Namespace Prefix:	pfsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the amount of loans serviced under mortgage servicing portfolio of the entity that are in bankruptcy.

No definition available.

Name:	pfsi_MortgageServicingPortfolioLoansManagedAndSecuritizedBankruptcy
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of 90 days or more delinquent loans serviced under mortgage servicing portfolio of the entity that are foreclosed.

No definition available.

Name:	pfsi_MortgageServicingPortfolioNinetyDaysOrMoreDelinquentDueForeclosedMortgageLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of 90 days or more delinquent loans serviced under mortgage servicing portfolio of the entity that are in foreclosure.

No definition available.

Name:	pfsi_MortgageServicingPortfolioNinetyDaysOrMoreDelinquentDueInForeclosureMortgageLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of 90 days or more delinquent loans serviced under mortgage servicing portfolio of the entity that are not in foreclosure.

No definition available.

Name:	pfsi_MortgageServicingPortfolioNinetyDaysOrMoreDelinquentNotInForeclosureMortgageLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of 60 days delinquent loans serviced under mortgage servicing portfolio of the entity.

No definition available.

Name:	pfsi_MortgageServicingPortfolioSixtyDaysDelinquentMortgageLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the amount of 30 days delinquent loans serviced under mortgage servicing portfolio of the entity.

No definition available.

Name:	pfsi_MortgageServicingPortfolioThirtyDaysDelinquentMortgageLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the unpaid principal balance of mortgage loans serviced for affiliates.

No definition available.

Name:	pfsi_PrincipalAmountOfLoansServicedForAffiliates
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the unpaid principal balance of mortgage loans serviced for nonaffiliates.

No definition available.

Name:	pfsi_PrincipalAmountOfLoansServicedForNonaffiliates
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the unpaid principal balance of mortgage loans serviced for others as the result of the company's production and sales of mortgage loans with servicing rights retained.

No definition available.

Name:	pfsi_PrincipalAmountOutstandingOfLoansServicedForOthersOriginatedServicing
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the unpaid principal balance of mortgage loans serviced for others as the result of the purchase of the related mortgage servicing rights or assumption of mortgage servicing liabilities.

No definition available.

Name:	pfsi_PrincipalAmountOutstandingOfLoansServicedForOthersPurchasedServicing
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Represents the unpaid principal balance of mortgage loans serviced for others as the result of the subserviced of the related mortgage servicing rights or assumption of mortgage servicing liabilities.

No definition available.

Name:	pfsi_PrincipalAmountOutstandingOfLoansServicedForOthersSubservicedServicing
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

No definition available.

Name:	pfsi_PrincipalAmountOutstandingOfLoansServicedForOthersSubservicedServicingButNotTransferredToPurchaser
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

This is the principal amount outstanding for loans in portfolio which are classified as held for sale.

No definition available.

Name:	pfsi_PrincipalAmountOutstandingOnLoansHeldForSale
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

This is the principal amount of loans (across all types of loans) that are overdue in payment by a set number of days.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (e)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

Name:	us-gaap_DelinquentAmountAtEndOfPeriodOnLoansManagedAndSecuritized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Subparagraph (a)
-Paragraph 4
-SubTopic 20
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-4

Name:	us-gaap_PrincipalAmountOutstandingOnLoansManagedAndSecuritized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_FairValueByAssetClassAxis=pfsi_MortgageServicingPortfolioOwnedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_FairValueByAssetClassAxis=pfsi_MortgageServicingPortfolioContractServicingAndSubservicedMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_CounterpartyNameAxis=pfsi_AgenciesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: