Net Gains on Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Non-cash gain:
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	$ (4,129)	$ (3,139)	$ (8,081)	$ (4,874)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	4,076	2,008	7,396	3,453
Changes in fair values of loans and derivatives held at end of quarter:
Net gains on loans held for sale at fair value	176,064	141,419	338,505	245,804
Nonrelated Party
Cash losses:
Loans	(413,822)	(608,885)	(723,012)	(664,271)
Hedging activities	92,552	300,686	242,771	84,548
Cash gain (loss), net of effects of cash hedging, on sale of loans held for sale	(321,270)	(308,199)	(480,241)	(579,723)
Non-cash gain:
Mortgage servicing rights and mortgage servicing liabilities resulting from loan sales	541,207	562,523	953,727	849,056
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	(4,129)	(3,139)	(8,081)	(4,874)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	4,076	2,008	7,396	3,453
Changes in fair values of loans and derivatives held at end of quarter:
Interest rate lock commitments	(1,055)	(28,209)	(20,841)	4,793
Loans	(2,695)	66,870	24,950	2,679
Hedging derivatives	(39,597)	(149,926)	(137,579)	(28,586)
Net gains on loans held for sale at fair value	176,537	141,928	339,331	246,798
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	(473)	(509)	(826)	(994)
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	$ (473)	$ (509)	$ (826)	$ (994)