Net Gains on Loans Held for Sale (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Non-cash gain:
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	$ (3,952)	$ (1,735)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	3,320	1,445
Changes in fair values of loans and derivatives held at end of quarter:
Net gains on loans held for sale at fair value	162,441	104,385
Nonrelated Party
Cash losses:
Loans	(309,190)	(55,386)
Hedging activities	150,219	(216,138)
Cash gain (loss), net of effects of cash hedging, on sale of loans held for sale	(158,971)	(271,524)
Non-cash gain:
Mortgage servicing rights and mortgage servicing liabilities resulting from loan sales	412,520	286,533
Provision for losses relating to representations and warranties on loans sold pursuant to loan sales	(3,952)	(1,735)
Provision for losses relating to representations and warranties on loans sold reduction in liability due to change in estimate	3,320	1,445
Changes in fair values of loans and derivatives held at end of quarter:
Interest rate lock commitments	(19,786)	33,002
Loans	27,645	(64,191)
Hedging derivatives	(97,982)	121,340
Net gains on loans held for sale at fair value	162,794	104,870
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	(353)	(485)
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	$ (353)	$ (485)