Name:	pfsi_FairValueMeasurementWithUnobservableInputsReconciliationReclassificationRecurringBasisAssetValue
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No definition available.

Name:	pfsi_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValueAdjusted
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The fair value, as of the date of each statement of financial position presented, of servicing assets that are restricted as collateral, 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.

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The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through loan sales.

No definition available.

Name:	pfsi_ServicingAssetAtFairValueAdditionsFromLoanSales
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Data Type:	xbrli:monetaryItemType
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The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through mortgage servicing rights purchases.

No definition available.

Name:	pfsi_ServicingAssetAtFairValueAdditionsFromPurchases
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- References

No definition available.

Name:	pfsi_ServicingAssetAtFairValueChangesInFairValueAbstract
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The value of new servicing assets, subsequently measured at fair value, acquired or created during the current period through purchases or from transfers of financial assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 50
-Section 50
-Paragraph 3
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-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 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 50
-Section 50
-Paragraph 3
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-URI http://asc.fasb.org/extlink&oid=68078379&loc=d3e122625-111746

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

No definition available.

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Amount of increase (decrease) in fair value from changes in the inputs, assumptions, or model used to calculate the fair value of the 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 3
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Amount of increase (decrease) from changes in fair value classified as other for a 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
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The increase (decrease) in the fair value of servicing assets that are subsequently measured at fair value.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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