Net Gains on Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Non-cash gain:
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	$ (1,651)	$ (6,561)	$ (7,887)	$ (26,918)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	1,769	4,355	7,165	11,680
Change in fair value of loans and derivatives held at period end:
Net gains on loans held for sale at fair value	168,694	626,754	689,720	1,963,743
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	(1,648)	(12,976)	(16,052)	(38,772)
Non-affiliates
Cash (losses) gains:
Loans	(587,659)	135,841	(1,983,051)	605,858
Hedging activities	570,864	(9,788)	1,543,568	400,786
Cash gain (loss), net of effects of cash hedging, on sale of loans held for sale	(16,795)	126,053	(439,483)	1,006,644
Non-cash gain:
Mortgage servicing rights and mortgage servicing liabilities resulting from loan sales	345,077	398,665	1,359,632	1,288,177
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	(1,651)	(6,561)	(7,887)	(26,918)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	1,769	4,355	7,165	11,680
Change in fair value of loans and derivatives held at period end:
Interest rate lock commitments	(121,353)	17,313	(378,396)	(316,103)
Loans	170,887	109,411	347,968	164,311
Hedging derivatives	(207,592)	(9,506)	(183,227)	(125,276)
Net gains on loans held for sale at fair value	$ 170,342	$ 639,730	$ 705,772	$ 2,002,515