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

- References

No definition available.

Name:	pfsi_ServicingAssetAtAmortizedValueAdditionalDisclosuresAbstract
Namespace Prefix:	pfsi_
Data Type:	xbrli:stringItemType
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Amortized amount, after transfer of mortgage servicing rights resulting from change in method of accounting, of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

No definition available.

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

Amortized amount, before valuation allowance, of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

No definition available.

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

The lower of amortized cost or fair value, as of the date of each statement of financial position presented, of servicing assets 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.

No definition available.

Name:	pfsi_ServicingAssetCarriedAtLowerOfAmortizedCostOrFairValuePledgedForRepurchaseAgreements
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
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Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss after change in accounting method reclassification.

No definition available.

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

Amount of decrease in the valuation allowance for impairment of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer from change in method of accounting.

No definition available.

Name:	pfsi_ValuationAllowanceForImpairmentOfRecognizedServicingAssetsResultingFromChangeInMethodOfAccounting
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
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Amount of other-than-temporary impairment (OTTI) applied to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

Name:	us-gaap_ServicingAssetAtAmortizedCostOtherThanTemporaryImpairments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122739-111746

Reference 2: 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

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 25
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=7524895&loc=d3e120260-111741

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amount of additions from purchases, assumption or transfer to contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

Name:	us-gaap_ServicingAssetAtAmortizedValueAdditions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Amount of amortization of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

Name:	us-gaap_ServicingAssetAtAmortizedValueAmortization1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

Name:	us-gaap_ServicingAssetAtAmortizedValueBalanceRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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Fair value of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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

Name:	us-gaap_ValuationAllowanceForImpairmentOfRecognizedServicingAssetsAggregateWriteDowns
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Name:	us-gaap_ValuationAllowanceForImpairmentOfRecognizedServicingAssetsBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Amount of increase in the valuation allowance for impairment of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer from charges to expense.

Name:	us-gaap_ValuationAllowanceForImpairmentOfRecognizedServicingAssetsProvisions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.