Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013
Commitments and Contingencies.
Commitments to purchase mortgage loans from PMT	$ 1,022,670
Commitments to fund mortgage loans	140,861
Total commitments to purchase and fund mortgage loans	1,163,531
Commitments to sell mortgage loans	$ 3,086,889

The amount, as of the balance sheet date, that the entity must expend to satisfy the terms of disclosed arrangements in which the entity must commit resources to sell mortgage loans.

No definition available.

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