CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 168,694	$ 626,754	$ 689,720	$ 1,963,743
Loan origination fees	34,037	94,581	141,840	295,909
Fulfillment fees from PennyMac Mortgage Investment Trust	18,407	43,922	55,807	158,777
Loan servicing fees
Loan servicing fees	313,080	267,758	906,688	787,224
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	95,411	(147,669)	420,424	(260,474)
Changes in fair value included in income				(1,037)
Mortgage servicing rights hedging results	(164,749)	(86,459)	(558,614)	(437,492)
Change in fair value of excess servicing spread financing payable to PennyMac Mortgage Investment Trust	(69,338)	(234,128)	(138,190)	(699,003)
Net loan servicing fees	243,742	33,630	768,498	88,221
Interest income:
Interest income	82,994	68,312	186,740	231,190
Interest expense:
Interest expense	82,965	90,711	231,399	300,855
Net interest income (expense)	29	(22,399)	(44,659)	(69,665)
Management fees, net:
Management fees from PennyMac Mortgage Investment Trust	7,731	8,520	23,758	28,882
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	(119)	(67)	(311)	478
Result of real estate acquired in settlement of loans	528	378	1,881	1,698
Other	3,241	1,293	8,775	5,507
Total net revenue	476,290	786,612	1,645,309	2,473,550
Expenses
Compensation	157,793	249,183	601,532	773,079
Loan origination	28,356	80,932	148,620	243,999
Technology	35,647	32,406	105,054	100,314
Professional services	16,230	24,429	57,126	62,549
Marketing and advertising	7,601	11,360	43,011	28,238
Occupancy and equipment	11,299	9,389	30,139	27,456
Servicing	20,399	27,892	22,204	78,365
Other	13,493	11,472	40,105	34,478
Total expenses	290,818	447,063	1,047,791	1,348,478
Income before provision for income taxes	185,472	339,549	597,518	1,125,072
Provision for income taxes	50,338	90,239	159,628	294,665
Net income attributable to PennyMac Financial Services, Inc. common stockholders	$ 135,134	$ 249,310	$ 437,890	$ 830,407
Earnings per share
Basic (in dollars per share)	$ 2.59	$ 4.02	$ 8.10	$ 12.65
Diluted (in dollars per share)	$ 2.46	$ 3.80	$ 7.69	$ 11.98
Weighted-average shares outstanding
Basic (in shares)	52,170	62,085	54,043	65,671
Diluted (in shares)	54,968	65,652	56,913	69,341
Non-affiliates
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 170,342	$ 639,730	$ 705,772	$ 2,002,515
Loan origination fees	31,845	88,040	134,902	274,048
Loan servicing fees
Loan servicing fees	270,336	216,592	774,483	635,620
Interest income:
Interest income	82,994	68,312	186,740	230,803
Interest expense:
Interest expense	82,965	90,711	231,399	299,575
PennyMac Mortgage Investment Trust
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	(1,648)	(12,976)	(16,052)	(38,772)
Loan origination fees	2,192	6,541	6,938	21,861
Loan servicing fees
Loan servicing fees	20,247	20,703	61,670	59,811
Interest income:
Interest income				387
Interest expense:
Interest expense				1,280
Others
Loan servicing fees
Loan servicing fees	$ 22,497	$ 30,463	$ 70,535	$ 91,793