CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 298,459	$ 754,341
Loan origination fees	67,858	104,037
Fulfillment fees from PennyMac Mortgage Investment Trust	16,754	60,835
Loan servicing fees
Loan servicing fees	291,258	259,445
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	(212,911)	(223,463)
Changes in fair value included in income		(1,037)
Mortgage servicing rights hedging results	(217,860)	(442,151)
Change in fair value of excess servicing spread financing payable to PennyMac Mortgage Investment Trust	(4,949)	(219,725)
Net loan servicing fees	286,309	39,720
Interest income:
Interest income	53,882	82,081
Interest expense:
Interest expense	77,307	107,713
Net interest expense	(23,425)	(25,632)
Management fees, net:
Management fees from PennyMac Mortgage Investment Trust	8,117	8,449
Change in fair value of investment in and dividends received from PennyMac Mortgage Investment Trust	2	401
Result of real estate acquired in settlement of loans	543	780
Other	2,887	1,755
Total net revenue	657,504	944,686
Expenses
Compensation	245,547	258,829
Loan origination	75,333	87,392
Technology	34,786	33,672
Marketing and advertising	22,403	6,665
Professional services	20,103	13,286
Occupancy and equipment	9,469	9,038
Servicing	(1,246)	19,183
Other	16,589	10,613
Total expenses	422,984	438,678
Income before provision for income taxes	234,520	506,008
Provision for income taxes	60,927	129,140
Net income attributable to PennyMac Financial Services, Inc. common stockholders	$ 173,593	$ 376,868
Earnings per share
Basic (in dollars per share)	$ 3.11	$ 5.45
Diluted (in dollars per share)	$ 2.94	$ 5.15
Weighted-average shares outstanding
Basic (in shares)	55,831	69,113
Diluted (in shares)	59,129	73,117
Non-affiliates
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	$ 308,111	$ 768,589
Loan origination fees	65,516	95,845
Loan servicing fees
Loan servicing fees	244,809	210,753
Interest income:
Interest income	53,882	81,694
Interest expense:
Interest expense	77,307	106,433
PennyMac Mortgage Investment Trust
Net gains on loans held for sale at fair value:
Net gains on loans held for sale at fair value	9,652	14,248
Loan origination fees	2,342	8,192
Loan servicing fees
Loan servicing fees	21,088	19,093
Interest income:
Interest income		387
Interest expense:
Interest expense		1,280
Others
Loan servicing fees
Loan servicing fees	$ 25,361	$ 29,599