Net Gains on Loans Held for Sale (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash (losses) gains:
Loans	$ (2,128,195)	$ 600,840	$ 2,025,260
Hedging activities	1,347,843	443,341	(767,588)
Cash gain (loss), net of effects of cash hedging, on sale of loans held for sale	(780,352)	1,044,181	1,257,672
Non-cash gain:
Mortgage servicing rights and mortgage servicing liabilities resulting from loan sales	1,718,094	1,755,318	1,114,720
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	(9,617)	(31,590)	(21,035)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	8,451	16,037	8,667
Change in fair value of loans and derivatives held at period end:
Interest rate lock commitments	(296,349)	(354,833)	540,376
Loans	188,849	210,961	(326,986)
Hedging derivatives	(20,879)	(124,200)	116,690
Net gains on loans held for sale at fair value	791,633	2,464,401	2,740,785
PennyMac Mortgage Investment Trust
Change in fair value of loans and derivatives held at period end:
Net gains on loans held for sale at fair value	(16,564)	(51,473)	50,681
Non-affiliates
Change in fair value of loans and derivatives held at period end:
Net gains on loans held for sale at fair value	$ 808,197	$ 2,515,874	$ 2,690,104