The amount of fulfilment fee payable or due to affiliates.

No definition available.

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Balance Type:	credit
Period Type:	instant

- Definition

Gain Loss On Sales Of Loans From Affiliates.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Represent fees for services the company performs on behalf of PMT in connection with the acquisition, packaging and sale of mortgage loans.

+ References

No definition available.

+ Details

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

- Definition

The amount of maximum multiplier factor for each pull through adjusted loan commitment.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the recapture expense incurred relating to mortgage loans subject to either MSRs or ESS owned by a related party that were refinanced by the Company.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Multiplying factor for each pull through adjusted loan commitment in excess of threshold limit per quarter.

+ References

No definition available.

+ Details

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Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Multiplying factor for number of purchased loans.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of Multiplying factor for number of purchased loans in excess of threshold limit per quarter.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the net gains from sale of mortgage loans to related party.

+ References

No definition available.

+ Details

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

- Definition

Percentage of fair market value.

+ References

No definition available.

+ Details

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

- Definition

Percentage of recapture rate.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

Pull through factor as a percentage.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

the administrative fee plus accrued interest and sourcing fee percent.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
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Period Type:	duration

- Definition

The renewal period in accordance with the terms of the agreement, for the related party agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	pfsi_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Fulfillment fee as a percentage of unpaid principal balance of all other mortgage loans, excluding Ginnie Mae.

+ References

No definition available.

+ Details

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

- Definition

Represents the the minimum unpaid principal balance of mortgage loans refinanced by the Company, for which a related party previously held the mortgage servicing rights, requiring the Company to transfer the mortgage servicing rights of the new loan to related party.

+ References

No definition available.

+ Details

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

- References

No definition available.

+ Details

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

- Definition

Represents a fee paid to a related party relating to mortgage loans purchased from the related party through its correspondent lending activities.

+ References

No definition available.

+ Details

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

- Definition

Represents a percentage of related party fees relating to mortgage loans purchased from the related party through its correspondent lending activities.

+ References

No definition available.

+ Details

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

- Definition

Represents the tax service fee receivable from transactions with related parties.

+ References

No definition available.

+ Details

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

- Definition

Represents the unpaid principal balance of loans fulfilled.

+ References

No definition available.

+ Details

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

- Definition

Represents unpaid principal balance of loans purchased.

+ References

No definition available.

+ Details

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

- Definition

The amount of threshold limit for loan commitment per quarter.

+ References

No definition available.

+ Details

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

- Definition

The amount of threshold limit for loan per quarter.

+ References

No definition available.

+ Details

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

- Definition

The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash inflow resulting from the sale of loans classified as held-for-sale, including proceeds from loans sold through mortgage securitization.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 16
-Subparagraph (a)
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-Name Accounting Standards Codification
-Topic 230
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-Section 45
-Paragraph 21
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3461-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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

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

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Transactions with Related Parties - Correspondent Production (Details) - USD ($)				12 Months Ended
	Jul. 01, 2020	Jun. 30, 2020	Sep. 12, 2016	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Lending activity between the entity and affiliate
Net gains on loans held for sale at fair value				$ (791,633,000)	$ (2,464,401,000)	$ (2,740,785,000)
Sale of loans held for sale to PMT				298,862,000		2,248,896,000
Fulfillment fee revenue				67,991,000	178,927,000	222,200,000
Proceeds from sale of mortgage loans held for sale to PennyMac Mortgage Investment Trust				298,862,000		2,248,896,000
Ginnie Mae Mortgage Backed Securities Guide Loan
Transactions with Affiliates
Threshold limit of loan commitment	$ 16,500
Threshold limit of loan	16,500
Maximum Multiplier factor for each pull through adjusted loan commitment	585
Multiplying factor for each pull through adjusted loan commitment in excess of threshold limit per quarter	355
Multiplying factor for number of purchased loans	315
Multiplying factor for number of purchased loans in excess of threshold limit per quarter	$ 195
Ginnie Mae Mortgage Backed Securities Guide Loan \| Minimum
Transactions with Affiliates
Pull through factor as a percentage	80.00%
Ginnie Mae Mortgage Backed Securities Guide Loan \| Maximum
Transactions with Affiliates
Pull through factor as a percentage	99.00%
Other mortgage loans
Transactions with Affiliates
Multiplying factor for number of purchased loans	$ 750
MBS Agreement
Transactions with Affiliates
The administrative fee plus accrued interest and sourcing fee percent			0.35%
Fulfillment fee as a percent of UPB of all other mortgage loans, excluding Ginnie Mae mortgage loans			0.50%
MSR Recapture Agreement
Transactions with Affiliates
Percentage of recapture rate.	15.00%
Lending activity between the entity and affiliate
Minimum percent of total UPB of loans originated from refinancing of loans which a related party previously held the MSR required to be transferred			30.00%
Related party transaction, renewal period		5 years
MSR Recapture Agreement \| First 15%
Transactions with Affiliates
Percentage of fair market value.	40.00%
Percentage of recapture rate.	15.00%
MSR Recapture Agreement \| In excess of 15% and upto 30%
Transactions with Affiliates
Percentage of fair market value.	35.00%
MSR Recapture Agreement \| In excess of 15% and upto 30% \| Minimum
Transactions with Affiliates
Percentage of recapture rate.	15.00%
MSR Recapture Agreement \| In excess of 15% and upto 30% \| Maximum
Transactions with Affiliates
Percentage of recapture rate.	30.00%
MSR Recapture Agreement \| In excess of 30%
Transactions with Affiliates
Percentage of fair market value.	30.00%
Percentage of recapture rate.	30.00%
PennyMac Mortgage Investment Trust
Lending activity between the entity and affiliate
Net gains on loans held for sale at fair value				16,564,000	51,473,000	(50,681,000)
Fulfillment fee revenue				67,991,000	178,927,000	222,200,000
PennyMac Mortgage Investment Trust \| MBS Agreement \| Minimum
Transactions with Affiliates
The administrative fee plus accrued interest and sourcing fee percent			0.02%
PennyMac Mortgage Investment Trust \| MBS Agreement \| Maximum
Transactions with Affiliates
The administrative fee plus accrued interest and sourcing fee percent			0.035%
PennyMac Mortgage Investment Trust \| Mortgage Lending
Lending activity between the entity and affiliate
Net (losses) gains on loans held for sale to PMT				(2,820,000)		81,295,000
Mortgage servicing rights and excess servicing spread recapture incurred				(13,744,000)	(51,473,000)	(30,614,000)
Total of gain on sale of loans and MSR recapture				(16,564,000)	(51,473,000)	50,681,000
Sale of loans held for sale to PMT				298,862,000		2,248,896,000
Tax service fee				8,418,000	26,126,000	23,408,000
Fulfillment fee revenue				67,991,000	178,927,000	222,200,000
Unpaid principal balance of loans fulfilled for PMT				37,090,031,000	110,003,574,000	100,389,252,000
Sourcing fees paid				4,968,000	6,472,000	11,037,000
Unpaid principal balance of loans purchased from PMT				49,680,267,000	$ 64,774,728,000	60,540,530,000
Proceeds from sale of mortgage loans held for sale to PennyMac Mortgage Investment Trust				$ 298,862,000		$ 2,248,896,000
PLS \| Minimum
Transactions with Affiliates
Sourcing fees (as a percent)	0.01%
PLS \| Maximum
Transactions with Affiliates
Sourcing fees (as a percent)	0.02%
PLS \| Ginnie Mae Mortgage Backed Securities Guide Loan
Transactions with Affiliates
Fulfilment fee payable	$ 0