Name:	pfsi_MortgagesHeldForSaleLineItems
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The sum of the carrying amounts, as of the date of the latest financial statement presented, of loans receivable which are owned but transferred to serve as collateral for the payment of related debt obligations, and for which the transferees are not permitted to sell or re-pledge them to an unrelated party.

No definition available.

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

Fair value portion of mortgage loans held-for-sale.

No definition available.

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

The fair value, as of the date of each statement of financial position presented, of loans which are owned but transferred to serve as collateral for the payment of the related debt obligation primarily arising from secured borrowings and repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

Name:	us-gaap_PledgedAssetsSeparatelyReportedLoansPledgedAsCollateralAtFairValue
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The fair value, as of the date of each statement of financial position presented, of loans that are restricted as collateral for the payment of repurchase agreements, and that are reclassified and separately reported in the statement of financial position because the transferee has the right by contract or custom to sell or re-pledge them.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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Name:	srt_MortgageLoansOnRealEstateLoanTypeAxis=us-gaap_ConventionalLoanMember
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Name:	srt_MortgageLoansOnRealEstateLoanTypeAxis=pfsi_MortgageLoansOnRealEstatePurchasedFromGinnieMaePoolsServicedByEntityMember
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