Parent Company Information - Condensed Statements of Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue
Repricing of payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement	$ 576		$ 280
Interest expense:
Interest expense	335,427	$ 390,699	271,551
Net interest income (expense)	(41,365)	(90,530)	(24,525)
Expenses
Professional services	73,270	94,283	64,064
Other	51,921	51,428	31,090
Total expenses	1,320,508	1,808,178	1,464,988
Income before provision for income taxes	665,247	1,359,183	2,240,609
Provision for income taxes	189,740	355,693	593,725
Net income	475,507	1,003,490	1,646,884
Private National Mortgage Acceptance Company
Revenue
Repricing of payable to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement	576		280
Non-affiliates
Interest expense:
Interest expense	335,427	389,419	263,133
PennyMac Financial Services, Inc. | Parent Company [Member]
Revenue
Dividends from subsidiaries	417,391	982,740	602,606
Interest income from subsidiary	121,452	77,162	15,830
Interest expense:
Interest expense	95,014	70,208	8,857
Net interest income (expense)	26,438	6,954	6,973
Total net revenue	443,829	989,694	609,579
Expenses
Charitable contributions		5,800	2,314
Professional services		2,236	42
Other	267	449	327
Total expenses	267	8,485	2,683
Income before provision for income taxes	443,562	981,209	606,896
Provision for income taxes	129,948	238,803	395,340
Income before equity in undistributed earnings of subsidiaries	313,614	742,406	211,556
Equity in undistributed earnings of subsidiaries	161,893	261,084	1,435,328
Net income	475,507	1,003,490	1,646,884
PennyMac Financial Services, Inc. | Non-affiliates | Parent Company [Member]
Interest expense:
Interest expense	$ 95,014	$ 70,208	8,774
PennyMac Financial Services, Inc. | Subsidiary | Parent Company [Member]
Interest expense:
Interest expense			$ 83