Transactions with Related Parties - Amounts due from Affiliate (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Amounts due from affiliate
Total due from affiliate	$ 29,262	$ 36,372
Payable to affiliate
Other Liabilities, Total	208,210	205,011
Related Party | PennyMac Mortgage Investment Trust
Amounts due from affiliate
Correspondent production fees	8,288	6,835
Allocated expenses and expenses incurred on PMT's behalf	5,612	11,447
Management fees	7,252	7,307
Servicing fees	6,809	6,740
Fulfillment fees	1,301	4,043
Payable to affiliate
Amounts advanced by PMT	208,154	201,451
Other expenses	56	3,560
Affiliated entities | PennyMac Mortgage Investment Trust
Amounts due from affiliate
Total due from affiliate	29,262	36,372
Payable to affiliate
Other Liabilities, Total	$ 208,210	$ 205,011