Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities
Net income	$ 114,449	$ 146,743
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Net gains on investments and financings	(166,705)	(13,761)
Net gains on loans acquired for sale	(46,737)	(24,477)
Change in fair value of mortgage servicing rights	263,676	64,515
Mortgage servicing rights hedging results	175,399	81,584
Accrual of unearned discounts and amortization of purchase premiums on mortgage-backed securities, loans at fair value, and asset-backed financings	(25,967)	8,050
Amortization of debt issuance costs	16,742	11,147
Results of real estate acquired in settlement of loans	155	251
Share-based compensation expense	3,008	3,421
Purchase of loans acquired for sale from nonaffiliates	(67,670,193)	(63,699,477)
Sale to nonaffiliates and repayment of loans acquired for sale	9,340,802	13,576,673
Repurchase of loans subject to representations and warranties	(25,318)	(50,537)
Decrease in servicing advances	134,885	103,636
Repurchase of real estate previously sold as loans acquired for sale	0	(456)
Increase in other assets	(225,737)	(187,922)
Decrease in accounts payable and accrued liabilities	(242,451)	(68,352)
Increase (decrease) in due to PennyMac Financial Services, Inc.	3,341	(8,759)
(Decrease) increase in income taxes payable	(34,459)	51,189
Net cash (used in) provided by operating activities	(1,082,381)	807,162
Cash flows from investing activities
Net decrease in short-term investments	25,551	102,212
Purchase of mortgage-backed securities	(479,960)	(3,108,701)
Sale and repayment of mortgage-backed securities	1,245,129	2,880,273
Repurchase of loans at fair value	0	(119)
Repayment of loans at fair value	75,113	72,925
Net settlement of derivative financial instruments	(1,346)	(56,025)
Distribution from credit risk transfer arrangements	118,668	136,033
Purchase of mortgage servicing rights	(27,981)	(14,637)
Transfer of mortgage servicing rights relating to delinquent loans to Agency	(341)	653
Sale of real estate acquired in settlement of loans	1,127	3,803
Decrease in margin deposits	122,389	44,065
Net cash provided by investing activities	1,078,349	60,482
Cash flows from financing activities
Sale of assets under agreements to repurchase	91,889,781	92,891,387
Repurchase of assets sold under agreements to repurchase	(91,766,070)	(93,488,136)
Issuance of mortgage loan participation purchase and sale agreements	1,771,100	1,739,456
Repayment of mortgage loan participation purchase and sale agreements	(1,742,221)	(1,715,465)
Issuance of notes payable secured by credit risk transfer and mortgage servicing assets	1,306,500	615,000
Repayment of notes payable secured by credit risk transfer and mortgage servicing assets	(1,384,419)	(595,303)
Issuance of asset-backed financing of variable interest entities	8,137	0
Repayment of asset-backed financings of variable interest entities	(73,083)	(70,455)
Issuance of unsecured senior notes	216,500	53,500
Payment of debt issuance costs	(21,260)	(8,344)
Payment of dividends to preferred shareholders	(31,364)	(31,364)
Payment of dividends to common shareholders	(104,450)	(105,812)
Payment of vested share-based compensation tax withholdings	(1,846)	(567)
Repurchase of common shares of beneficial interest	0	(27,011)
Net cash provided by (used in) financing activities	67,305	(743,114)
Net increase in cash	63,273	124,530
Cash at beginning of period	281,085	111,866
Cash at end of period	344,358	236,396
Payments, net:
Income taxes	7,534	6,142
Interest	564,417	562,109
Non cash investing activities:
Receipt of mortgage servicing rights as proceeds from sales of loans	159,456	249,925
Unsettled purchase of mortgage servicing rights	1,447	1,626
Exchange of mortgage servicing spread for interest-only stripped mortgage-backed securities and interest receivable	35,609	105,096
Transfer of loans and advances to real estate acquired in settlement of loans	0	1,182
Non-cash financing activities:
Dividends declared, not paid	34,850	34,805
PennyMac Loan Services, LLC [Member]
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Purchase of loans acquired for sale from PennyMac Financial Services, Inc.	(191,250)	0
Sale of loans acquired for sale to PennyMac Financial Services, Inc.	57,502,461	50,812,386
(Increase) decrease in due from PennyMac Financial Services, Inc.	$ (8,482)	$ 1,308