CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flow from operating activities
Net income	$ 302,756	$ 581,097
Adjustments to reconcile net income to net cash provided by operating activities:
Net gains on loans held for sale at fair value	(521,026)	(1,336,989)
Change in fair value of mortgage servicing rights, mortgage servicing liabilities and excess servicing spread	(325,013)	113,842
Mortgage servicing rights hedging gains	393,865	351,033
Capitalization of interest and advance on loans held for sale	(2,817)	(1,925)
Accrual of interest on excess servicing spread financing payable to PennyMac Mortgage Investment Trust		1,280
Amortization of debt issuance costs	10,133	13,977
Change in fair value of investment in common shares of PennyMac Mortgage Investment Trust	263	(475)
Results of real estate acquired in settlement of loans	(1,353)	(1,320)
Stock based compensation expense	24,223	19,771
Reversal of provision for servicing advance losses	(51,293)	(33,590)
Impairment of capitalized software		728
Depreciation and amortization	14,375	14,967
Amortization of right-to-use assets	7,755	6,918
Purchase of loans held for sale from PennyMac Mortgage Investment Trust	(23,982,890)	(35,474,697)
Origination of loans held for sale	(15,128,696)	(27,731,285)
Purchase of loans held for sale from non-affiliates	(1,215,388)	(2,664,336)
Purchase of loans from Ginnie Mae securities and early buyout investors	(4,752,678)	(11,562,768)
Sale to non-affiliates and principal payments of loans held for sale	50,841,788	79,007,900
Sale of loans held for sale to PennyMac Mortgage Investment Trust	298,862
Repurchase of loans subject to representations and warranties	(45,176)	(43,914)
Decrease in servicing advances	128,940	12,543
(Increase) decrease in receivable from PennyMac Mortgage Investment Trust	(3,998)	18,058
Sale of real estate acquired in settlement of loans	9,937	9,503
Payments to exchanged Private National Mortgage Acceptance Company, LLC unitholders under tax receivable agreement	(3,516)	(3,350)
Decrease (increase) in other assets	134,692	63,006
(Decrease) increase in accounts payable and accrued expenses	(54,033)	61,121
Decrease in operating lease liabilities	(8,040)	(8,265)
Decrease in payable to PennyMac Mortgage Investment Trust	(140,615)	(28,584)
Increase (decrease) in income taxes payable	200,459	(52,648)
Net cash provided by operating activities	6,131,516	1,331,598
Cash flow from investing activities
Decrease in short-term investment	1,912	11,497
Net change in assets purchased from PMT under agreement to resell		80,862
Net settlement of derivative financial instruments used for hedging of mortgage servicing rights	(574,109)	(345,621)
Purchase of furniture, fixtures, equipment and leasehold improvements	(4,089)	(5,049)
Acquisition of capitalized software	(39,267)	(21,594)
Decrease in margin deposits	188,176	134,666
Net cash used in investing activities	(427,377)	(145,239)
Cash flow from financing activities
Sale of assets under agreements to repurchase	42,087,498	69,437,269
Repurchase of assets sold under agreements to repurchase	(46,938,843)	(70,839,012)
Issuance of mortgage loan participation purchase and sale certificates	9,556,801	12,508,356
Repayment of mortgage loan participation purchase and sale certificates	(9,533,871)	(12,517,580)
Repayments of obligations under capital lease	(3,489)	(4,187)
Issuance of notes payable secured by mortgage servicing assets	500,000
Issuance of unsecured senior notes		650,000
Repayment of excess servicing spread financing		(134,624)
Payment of debt issuance costs	(12,892)	(18,648)
Issuance of common stock pursuant to exercise of stock options	1,380	3,397
Payment of withholding taxes relating to stock-based compensation	(7,780)	(8,546)
Payment of dividend to holders of common stock	(22,564)	(27,940)
Repurchase of common stock	(255,057)	(443,439)
Net cash used in financing activities	(4,628,817)	(1,394,954)
Net increase (decrease) in cash and restricted cash	1,075,322	(208,595)
Cash and restricted cash at beginning of period	340,093	532,781
Cash and restricted cash at end of period	1,415,415	324,186
Cash	1,415,396	324,158
Restricted cash included in Other assets	19	28
Supplemental cash flow information:
Cash paid for interest	154,745	208,015
Cash (refunds received) paid for income taxes, net	(91,169)	257,074
Non-cash investing activities:
Mortgage servicing rights resulting from loan sales	1,014,555	953,895
Operating right-of-use assets recognized	793	7,813
Non-cash financing activities:
Mortgage servicing liabilities resulting from loan sales		64,383
Issuance of Excess servicing spread payable to PennyMac Mortgage Investment Trust pursuant to a recapture agreement		557
Issuance of common stock in settlement of directors' fees	$ 102	$ 101