CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 151,374	$ 168,694	$ 397,178	$ 689,720
Loan origination fees	37,701	34,037	108,059	141,840
Fulfillment fees from PennyMac Mortgage Investment Trust	5,531	18,407	22,895	55,807
Loan servicing fees:
Loan servicing fees	387,934	313,080	1,082,462	906,688
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	221,096	95,411	(70,608)	420,424
Mortgage servicing rights hedging results	(423,656)	(164,749)	(531,565)	(558,614)
Change in fair value of excess servicing spread financing payable to PennyMac Mortgage Investment Trust	(202,560)	(69,338)	(602,173)	(138,190)
Net loan servicing fees	185,374	243,742	480,289	768,498
Interest income:
Interest income	166,552	82,994	467,982	186,740
Interest expense:
Interest expense	156,863	82,965	467,276	231,399
Net interest income (expense)	9,689	29	706	(44,659)
Management fees, net:
Management fees from PennyMac Mortgage Investment Trust	7,175	7,731	21,510	23,758
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	(51)	(119)	91	(311)
Results of real estate acquired in settlement of loans	637	528	978	1,881
Other	2,878	3,241	8,011	8,775
Total net revenues	400,308	476,290	1,039,717	1,645,309
Expenses
Compensation	156,909	157,793	441,826	601,532
Technology	39,000	35,647	110,282	105,054
Loan origination	28,889	28,356	87,621	148,620
Professional services	11,942	16,230	50,837	57,126
Servicing	13,242	20,399	40,526	22,204
Occupancy and equipment	8,900	11,299	27,786	30,139
Marketing and advertising	4,632	7,601	13,451	43,011
Other	9,997	13,493	29,527	40,105
Total expenses	273,511	290,818	801,856	1,047,791
Income before provision for income taxes	126,797	185,472	237,861	597,518
Provision for income taxes	33,927	50,338	56,363	159,628
Net income	$ 92,870	$ 135,134	$ 181,498	$ 437,890
Earnings per share
Basic (in dollars per share)	$ 1.86	$ 2.59	$ 3.63	$ 8.10
Diluted (in dollars per share)	$ 1.77	$ 2.46	$ 3.44	$ 7.69
Weighted-average shares outstanding
Basic (in shares)	49,902	52,170	49,975	54,043
Diluted (in shares)	52,561	54,968	52,735	56,913
Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ (500)	$ (1,648)	$ (1,494)	$ (16,052)
Loan origination fees	579	2,192	2,690	6,938
Nonrelated Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	151,874	170,342	398,672	705,772
Loan origination fees	37,122	31,845	105,369	134,902
Interest expense:
Interest expense	156,863	82,965	467,276	231,399
Non-affiliates | Nonrelated Party
Loan servicing fees:
Loan servicing fees	328,049	270,336	925,865	774,483
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	(500)	(1,648)	(1,494)	(16,052)
Loan servicing fees:
Loan servicing fees	20,257	20,247	61,023	61,670
Others | Nonrelated Party
Loan servicing fees:
Loan servicing fees	$ 39,628	$ 22,497	$ 95,574	$ 70,535