Transactions with Related Parties - Summary of Amounts Receivable and Payable to PFSI (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Receivable from PFSI
Due from Affiliates	$ 6,531	$ 8,806
Payable to PFSI
Total expense due to affiliate	17,647	18,965
PennyMac Financial Services, Inc. [Member]
Receivable from PFSI
MSR recapture receivable	691	781
Other	5,840	8,025
Due from Affiliates	6,531	8,806
Payable to PFSI
Management fees	5,352	5,670
Servicing fees	4,601	3,682
Correspondent production fees	2,898	2,729
Fulfillment fees	1,631	1,082
Allocated expenses	1,254	390
Conditional Reimbursement	900	900
Expenses paid by PFSI on PMT's behalf	576	4,100
Interest on Note payable to PFSI	435	412
Total expense due to affiliate	$ 17,647	$ 18,965