Name:	pfsi_AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPerLoanCostOfServicing
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No definition available.

Name:	pfsi_MsrAndPoolCharacteristicsAbstract
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No definition available.

Name:	pfsi_PerLoanAnnualCostOfServicingAbstract
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No definition available.

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No definition available.

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The hypothetical financial impact of a 10 percent adverse change of cost of servicing on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

No definition available.

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The hypothetical financial impact of a 10 percent adverse change of pricing spread on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

No definition available.

Name:	pfsi_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf10PercentAdverseChangeInPricingSpread
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The hypothetical financial impact of a 20 percent adverse change of cost of servicing on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

No definition available.

Name:	pfsi_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInCostOfServicing
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The hypothetical financial impact of a 20 percent adverse change of pricing spread on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

No definition available.

Name:	pfsi_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOf20PercentAdverseChangeInPricingSpread
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The hypothetical financial impact of a specified adverse percentage change in cost of servicing on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

No definition available.

Name:	pfsi_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInCostOfServicing
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
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The hypothetical financial impact of a specified adverse percentage change in pricing spread on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

No definition available.

Name:	pfsi_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInPricingSpread
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Represents the servicing asset unpaid principal balance of underlying loans.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Weighted-average note rate on servicing assets.

No definition available.

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Data Type:	xbrli:pureItemType
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Period Type:	duration

Weighted-average servicing fee rate on servicing assets.

No definition available.

Name:	pfsi_ServicingAssetWeightedAverageServiceFeeRate
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

No definition available.

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Data Type:	xbrli:stringItemType
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The hypothetical financial impact of a 10 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=118948506&loc=d3e107314-111719

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The hypothetical financial impact of a 20 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

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The hypothetical financial impact of a specified adverse percentage change in prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

Name:	us-gaap_SensitivityAnalysisOfFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesImpactOfOtherThan10Or20PercentAdverseChangeInPrepaymentSpeed
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Data Type:	xbrli:monetaryItemType
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Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745

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Value of input used to measure servicing asset.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

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