CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 314,455	$ 256,819	$ 770,151	$ 595,324
Loan origination fees	61,696	49,430	167,398	127,876
Fulfillment fees from PennyMac Mortgage Investment Trust	6,162	11,492	17,266	19,935
Loan servicing fees:
Servicing fees	535,106	462,037	1,530,241	1,326,917
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(392,174)	(628,258)	(1,070,300)	(758,158)
Mortgage servicing rights hedging results	98,306	242,051	95,978	(224,371)
Change in fair value of mortgage servicing rights and mortgage-backed securities	(293,868)	(386,207)	(974,322)	(982,529)
Net loan servicing fees	241,238	75,830	555,919	344,388
Management fees from PennyMac Mortgage Investment Trust	6,912	7,153	20,793	21,474
Net interest (expense) income:
Interest income	248,753	225,470	660,553	582,707
Interest expense	249,900	217,597	697,559	591,237
Net interest (expense) income	(1,147)	7,873	(37,006)	(8,530)
Results of real estate acquired in settlement of loans	(981)	(269)	(1,159)	330
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	(15)	68	65	38
Repricing of payable to exchanged Private National Mortgage Acceptance Company , LLC unitholders under tax receivable agreement			1,092
Other	4,578	3,438	14,012	22,786
Total net revenues	632,898	411,834	1,508,531	1,123,621
Expenses
Compensation	205,314	171,316	574,843	459,648
Loan origination	69,407	45,208	182,339	116,046
Technology	44,772	37,059	127,226	108,716
Servicing	29,105	28,885	79,266	67,909
Marketing and advertising	14,016	5,088	35,837	14,204
Professional services	10,145	9,339	27,562	28,005
Occupancy and equipment	8,604	8,156	25,365	24,725
Other	15,161	12,858	39,081	32,706
Total expenses	396,524	317,909	1,091,519	851,959
Income before provision for income taxes	236,374	93,925	417,012	271,662
Provision for income taxes	54,871	24,557	22,766	64,728
Net income	$ 181,503	$ 69,368	$ 394,246	$ 206,934
Earnings per share
Basic (in dollars per share)	$ 3.51	$ 1.36	$ 7.64	$ 4.07
Diluted (in dollars per share)	$ 3.37	$ 1.3	$ 7.34	$ 3.88
Weighted-average shares outstanding
Basic (in shares)	51,730	51,180	51,635	50,895
Diluted (in shares)	53,879	53,495	53,734	53,274
Related Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 17,454	$ 2,506	$ 29,367	$ 1,680
Loan origination fees	558	1,107	1,537	1,897
Nonrelated Party
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	297,001	254,313	740,784	593,644
Loan origination fees	61,138	48,323	165,861	125,979
Net interest (expense) income:
Interest expense	249,900	217,597	697,559	591,237
Non-affiliates | Nonrelated Party
Loan servicing fees:
Servicing fees	460,360	393,457	1,313,564	1,126,523
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	17,454	2,506	29,367	1,680
Loan servicing fees:
Servicing fees	21,012	22,240	64,386	62,766
Net interest (expense) income:
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	(15)	68	65	38
Others | Nonrelated Party
Loan servicing fees:
Servicing fees	$ 53,734	$ 46,340	$ 152,291	$ 137,628