Related Party Transaction, Additional Servicing Fee Per Month for Delinquent Loans

No definition available.

Name:	pfsi_RelatedPartyTransactionAdditionalServicingFeePerMonthForDelinquentLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the base servicing fee per month for real estate in settlement of loans.

+ References

No definition available.

+ Details

Name:	pfsi_RelatedPartyTransactionBaseServicingFeePerMonthForRealEstateInSettlementOfLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related Party Transaction, Base Servicing Fee Per Month for Subserviced Adjustable Rate Loans

+ References

No definition available.

+ Details

Name:	pfsi_RelatedPartyTransactionBaseServicingFeePerMonthForSubservicedAdjustableRateLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Related Party Transaction, Base Servicing Fee Per Month for Subserviced Fixed Rate Loans

+ References

No definition available.

+ Details

Name:	pfsi_RelatedPartyTransactionBaseServicingFeePerMonthForSubservicedFixedRateLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The rate is for distressed loans whose payment status is current.

+ References

No definition available.

+ Details

Name:	pfsi_RelatedPartyTransactionServicingFeePerMonthForCurrentLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Related Party Transaction, Supplemental Fee Per Month for Each Distressed Whole Loan

+ References

No definition available.

+ Details

Name:	pfsi_RelatedPartyTransactionSupplementalFeePerMonthForEachDistressedWholeLoan
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of revenue from servicing real estate mortgages, and other financial assets held by others. Includes premiums received in lieu of regular servicing fee.

+ References

No definition available.

+ Details

Name:	pfsi_ServicingFee
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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

- References

No definition available.

+ Details

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

- Details

Name:	us-gaap_RelatedPartyTransactionAxis=pfsi_MortgageLoanServicingAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=pfsi_PennyMacMortgageInvestmentTrustMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

- Details

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

Related Party Transactions - Mortgage Loan Servicing (Details) - USD ($)		3 Months Ended		6 Months Ended
	Sep. 12, 2016	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Loan Servicing Agreement
Transactions with Affiliates
Base servicing fees per month for REO	$ 75
Base servicing fees per month for fixed-rate non-distressed loans subserviced	7.50
Base servicing fees per month for adjustable rate non-distressed loans subserviced	8.50
Supplemental fee per month for each distressed whole loan	25
Minimum \| Loan Servicing Agreement
Transactions with Affiliates
Servicing fees amount per month for current loans	30
Additional servicing fee amount per month for delinquent loans	10
Maximum \| Loan Servicing Agreement
Transactions with Affiliates
Servicing fees amount per month for current loans	95
Additional servicing fee amount per month for delinquent loans	$ 55
PennyMac Mortgage Investment Trust
Summary of mortgage loan servicing fees earned
Loan servicing fees		$ 20,335,000	$ 20,015,000	$ 41,423,000	$ 39,108,000
PennyMac Mortgage Investment Trust \| Loans acquired for sale at fair value
Summary of mortgage loan servicing fees earned
Loan servicing fees		258,000	630,000	522,000	1,173,000
PennyMac Mortgage Investment Trust \| Loans at fair value
Summary of mortgage loan servicing fees earned
Loan servicing fees		106,000	80,000	316,000	217,000
PennyMac Mortgage Investment Trust \| Mortgage servicing rights
Summary of mortgage loan servicing fees earned
Loan servicing fees		$ 19,971,000	$ 19,305,000	$ 40,585,000	$ 37,718,000