Related Party Transactions - Amounts due from Affiliate (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Amounts due from affiliate
Total due from affiliate	$ 43,234	$ 40,091
Payable to affiliate
Payable to affiliates	98,991	228,019
PennyMac Mortgage Investment Trust
Amounts due from affiliate
Fulfillment fees	10,511
Management fees	7,910	8,918
Servicing fees	6,725	6,848
Correspondent production fees	6,035	8,894
Allocated expenses	12,053	15,431
Total due from affiliate	43,234	40,091
Payable to affiliate
Amounts advanced by PMT	95,409	212,066
Other expenses	3,582	15,953
Payable to affiliates	$ 98,991	$ 228,019