CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Cash flow from operating activities
Net income	$ 88,628	$ 302,756
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Net gains on loans held for sale at fair value	(245,804)	(521,026)
Change in fair value of mortgage servicing rights and mortgage servicing liabilities	291,704	(325,013)
Mortgage servicing rights hedging results	107,909	393,865
Capitalization of interest on loans held for sale	(507)	(2,817)
Amortization of debt issuance costs	9,315	10,133
Change in fair value of investment in common shares of PennyMac Mortgage Investment Trust	(82)	263
Results of real estate acquired in settlement in loans	(341)	(1,353)
Stock-based compensation expense	12,025	24,223
Reversal of provision for servicing advance losses	(5,049)	(51,293)
Depreciation and amortization	25,939	14,375
Amortization of operating lease right-of-use assets	9,154	7,755
Purchase of loans held for sale from PennyMac Mortgage Investment Trust	(32,087,157)	(23,982,890)
Origination of loans held for sale	(5,303,061)	(15,128,696)
Purchase of loans held for sale from non-affiliates	(968,096)	(1,215,388)
Purchase of loans from Ginnie Mae securities and early buyout investors	(1,395,735)	(4,752,678)
Sale to non-affiliates and principal payment of loans held for sale	38,410,109	50,841,788
Sale of loans held for sale to PennyMac Mortgage Investment Trust		298,862
Repurchase of loans subject to representations and warranties	(24,345)	(45,176)
Decrease in servicing advances	164,845	128,940
Decrease (increase) in receivable from PennyMac Mortgage Investment Trust	11,537	(3,998)
Sale of real estate acquired in settlement of loans	16,411	9,937
(Increase) decrease in other assets	(81,155)	134,692
Decrease in accounts payable and accrued expenses	(3,977)	(54,033)
Decrease in operating lease liabilities	(10,080)	(8,040)
Decrease in payable to PennyMac Mortgage Investment Trust	(82,156)	(140,615)
Payments to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement		(3,516)
Increase in income taxes payable	23,403	200,459
Net cash (used in) provided by operating activities	(1,036,566)	6,131,516
Cash flow from investing activities
Decrease in short-term investment	4,106	1,912
Net settlement of derivative financial instruments used for hedging of mortgage servicing rights	(20,239)	(574,109)
Transfer of mortgage servicing rights related to delinquent loans to Agency	232
Acquisition of capitalized software	(19,244)	(39,267)
Purchase of furniture, fixtures, equipment and leasehold improvements	(631)	(4,089)
(Increase) decrease in margin deposits	(150,716)	188,176
Net cash used in investing activities	(186,492)	(427,377)
Cash flow from financing activities
Sale of assets under agreements to repurchase	39,333,545	42,087,498
Repurchase of assets sold under agreements to repurchase	(38,551,928)	(46,938,843)
Issuance of mortgage loan participation purchase and sale certificates	10,042,768	9,556,801
Repayment of mortgage loan participation purchase and sale certificates	(9,824,304)	(9,533,871)
Issuance of notes payable secured by mortgage servicing assets	680,000	500,000
Repayment of notes payable secured by mortgage servicing assets	(150,000)
Repayment of obligations under capital lease		(3,489)
Payment of debt issuance costs	(10,119)	(12,892)
Issuance of common stock pursuant to exercise of stock options	8,647	1,380
Payment of withholding taxes relating to stock-based compensation	(9,142)	(7,780)
Payment of dividends to holders of common stock	(20,974)	(22,564)
Repurchase of common stock	(71,575)	(255,057)
Net cash provided by (used in) financing activities	1,426,918	(4,628,817)
Net increase in cash and restricted cash	203,860	1,075,322
Cash and restricted cash at beginning of period	1,328,539	340,093
Cash and restricted cash at end of period	1,532,399	1,415,415
Cash	1,532,399	1,415,396
Restricted cash included in Other assets		19
Supplemental cash flow information:
Cash paid for interest	305,512	154,745
Cash refunds received for income taxes, net	967	91,169
Non-cash investing activities:
Mortgage servicing rights resulting from loan sales	849,056	1,014,555
Operating right-of-use assets recognized	1,727	793
Non-cash financing activities:
Issuance of common stock in settlement of directors' fees	$ 102	$ 102