CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 141,419	$ 222,567	$ 245,804	$ 521,026
Loan origination fees	38,968	39,945	70,358	107,803
Fulfillment fees from PennyMac Mortgage Investment Trust	5,441	20,646	17,364	37,400
Loan servicing fees:
Loan servicing fees	356,471	302,350	694,528	593,608
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(55,257)	112,102	(291,704)	325,013
Mortgage servicing rights hedging results	(155,136)	(176,005)	(107,909)	(393,865)
Change in fair value of excess servicing spread financing payable to PennyMac Mortgage Investment Trust	(210,393)	(63,903)	(399,613)	(68,852)
Net loan servicing fees	146,078	238,447	294,915	524,756
Interest income:
Interest income	172,952	49,864	301,430	103,746
Interest expense:
Interest expense	178,642	71,127	310,413	148,434
Net interest expense	(5,690)	(21,263)	(8,983)	(44,688)
Management fees, net:
Management fees from PennyMac Mortgage Investment Trust	7,078	7,910	14,335	16,027
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	116	(194)	142	(192)
Results of real estate acquired in settlement of loans	199	810	341	1,353
Other	2,938	2,647	5,133	5,534
Total net revenues	336,547	511,515	639,409	1,169,019
Expenses
Compensation	136,982	198,192	284,917	443,739
Technology	35,244	34,621	71,282	69,407
Loan origination	31,646	44,931	58,732	120,264
Professional services	17,888	20,793	38,895	40,896
Servicing	14,652	3,051	27,284	1,805
Occupancy and equipment	10,066	9,371	18,886	18,840
Marketing and advertising	5,578	13,007	8,819	35,410
Other	11,574	10,023	19,530	26,612
Total expenses	263,630	333,989	528,345	756,973
Income before provision for income taxes	72,917	177,526	111,064	412,046
Provision for income taxes	14,667	48,363	22,436	109,290
Net income	$ 58,250	$ 129,163	$ 88,628	$ 302,756
Earnings per share
Basic (in dollars per share)	$ 1.17	$ 2.38	$ 1.77	$ 5.51
Diluted (in dollars per share)	$ 1.11	$ 2.28	$ 1.68	$ 5.23
Weighted-average shares outstanding
Basic (in shares)	49,874	54,167	50,013	54,995
Diluted (in shares)	52,264	56,642	52,803	57,892
Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ (509)	$ (4,752)	$ (994)	$ (14,404)
Loan origination fees	701	2,404	2,111	4,746
Nonrelated Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	141,928	227,319	246,798	535,430
Loan origination fees	38,267	37,541	68,247	103,057
Interest expense:
Interest expense	178,642	71,127	310,413	148,434
Non-affiliates | Nonrelated Party
Loan servicing fees:
Loan servicing fees	307,119	259,338	597,816	504,147
PennyMac Mortgage Investment Trust | Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	(509)	(4,752)	(994)	(14,404)
Loan servicing fees:
Loan servicing fees	20,317	20,335	40,766	41,423
Others | Nonrelated Party
Loan servicing fees:
Loan servicing fees	$ 29,035	$ 22,677	$ 55,946	$ 48,038