Related Party Transactions - Amounts due from Affiliate (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Amounts due from affiliate
Total due from affiliate	$ 35,166	$ 36,372
Payable to affiliate
Payable to affiliates	142,007	205,011
PennyMac Mortgage Investment Trust
Amounts due from affiliate
Correspondent production fees	8,325	6,835
Allocated expenses and expenses incurred on PMT's behalf	7,610	11,447
Management fees	7,257	7,307
Servicing fees	6,791	6,740
Fulfillment fees	5,183	4,043
Total due from affiliate	35,166	36,372
Payable to affiliate
Amounts advanced by PMT	142,007	201,451
Other expenses		3,560
Payable to affiliates	$ 142,007	$ 205,011