Net Gains on Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Non-cash gain:
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	$ (4,054)	$ (4,129)	$ (7,601)	$ (8,081)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	2,220	4,076	3,635	7,396
Changes in fair values of loans and derivatives held at end of quarter:
Net gains on loans held for sale at fair value	234,659	176,064	455,696	338,505
Nonrelated Party
Cash losses:
Loans	(573,210)	(413,822)	(849,520)	(723,012)
Hedging activities	(105,772)	92,552	(416,471)	242,771
Cash gain (loss), net of effects of cash hedging, on sale of loans held for sale	(678,982)	(321,270)	(1,265,991)	(480,241)
Non-cash gain:
Mortgage servicing rights resulting from loan sales	814,538	541,207	1,464,887	953,727
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	(4,054)	(4,129)	(7,601)	(8,081)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	2,220	4,076	3,635	7,396
Changes in fair values of loans and derivatives held at end of quarter:
Interest rate lock commitments	32,211	(1,055)	108,588	(20,841)
Loans	(15,268)	(2,695)	(102,307)	24,950
Hedging derivatives	76,919	(39,597)	242,572	(137,579)
Net gains on loans held for sale at fair value	227,584	176,537	443,783	339,331
Related Party
Changes in fair values of loans and derivatives held at end of quarter:
Net gains on loans held for sale at fair value	7,075	(473)	11,913	(826)
Related Party | PennyMac Mortgage Investment Trust
Changes in fair values of loans and derivatives held at end of quarter:
Net gains on loans held for sale at fair value	$ 7,075	$ (473)	$ 11,913	$ (826)