Transactions with Related Parties - Summary of Financing Activities (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2016	Mar. 31, 2015
PennyMac Financial Services, Inc. [Member]
Related Party Transaction [Line Items]
Note payable-Interest expense	$ 1,602	$ 0
PNMAC Capital Management LLC [Member]
Related Party Transaction [Line Items]
Conditional Reimbursements paid to PCM	$ 0	$ 157

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Period Type:	duration