Net Gains on Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Non-cash gain:
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	$ (2,182)	$ (10,304)	$ (6,236)	$ (20,357)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	2,227	3,640	5,396	7,325
Change in fair value of loans and derivatives held at period end:
Net gains on loans held for sale at fair value	222,567	582,648	521,026	1,336,989
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	(4,752)	(11,548)	(14,404)	(25,796)
Non-affiliates
Cash (losses) gains:
Loans	(451,171)	387,305	(1,395,392)	470,017
Hedging activities	82,617	(325,651)	972,704	410,574
Cash gain (loss), net of effects of cash hedging, on sale of loans held for sale	(368,554)	61,654	(422,688)	880,591
Non-cash gain:
Mortgage servicing rights and mortgage servicing liabilities resulting from loan sales	398,253	425,941	1,014,555	889,512
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	(2,182)	(10,304)	(6,236)	(20,357)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	2,227	3,640	5,396	7,325
Change in fair value of loans and derivatives held at period end:
Interest rate lock commitments	27,251	5,670	(257,043)	(333,416)
Loans	(43,349)	(50,322)	177,081	54,900
Hedging derivatives	213,673	157,917	24,365	(115,770)
Net gains on loans held for sale at fair value	$ 227,319	$ 594,196	$ 535,430	$ 1,362,785