CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash Flows From Operating Activities
Net income (loss)	$ 526,004	$ 476,634
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Change in fair value of investments, net	365,737	307,633
Change in fair value of equity investments	(17,263)	27,630
Change in fair value of secured notes and bonds payable	2,451	(2,049)
(Gain) loss on settlement of investments, net	(269,714)	(283,306)
(Gain) loss on sale of originated residential mortgage loans, held-for-sale, net	(296,199)	(287,852)
(Gain) loss on transfer of loans to real estate owned (“REO”)	(3,151)	(7,472)
Accretion and other amortization	(45,137)	(29,892)
Provision (reversal) for credit losses on securities, loans and REO	1,268	3,009
Non-cash portions of servicing revenue, net	13,071	120,272
Deferred tax provision	145,217	39,626
Mortgage loans originated and purchased for sale, net of fees	(26,721,645)	(18,109,588)
Sales proceeds and loan repayment proceeds for residential mortgage loans, held-for-sale	24,615,975	18,174,194
Interest received from servicer advance investments, RMBS, loans and other	20,744	27,874
Interest received from reverse repurchase agreements	39,333	0
Residential mortgage loan repayment proceeds of consolidated CFEs	181,653	130,704
Mortgage loans receivable repayment proceeds of consolidated CFEs	0	166,550
Purchase of investments of consolidated CFEs	(12,378)	0
Proceeds from sale and repayments of investments of consolidated CFEs	10,309	0
Changes in:
Servicer advances receivable, net	240,698	377,567
Other assets	129,409	16,191
Accrued expenses and other liabilities	(126,322)	83,799
Net cash provided by (used in) operating activities	(1,199,940)	1,231,524
Cash Flows From Investing Activities
Business acquisitions, net of cash acquired	(603,778)	0
Maturity of US Treasuries	25,000	0
Purchase of US Treasuries	(5,047,710)	(973,795)
Purchase of servicer advance investments	(400,652)	(445,470)
Purchase of Excess MSR	(122,887)	0
Purchase of government, government-backed and other securities	(1,330,079)	(2,898,237)
US Treasury sales and Treasury securities payable	4,673,753	0
Reverse repurchase agreements entered	(1,747,581)	0
Reverse repurchase agreements closed	2,020,226	0
Purchase of residential mortgage loans	0	(1,269)
Purchase of SFR properties, MSRs and other assets	(149,950)	(11,975)
Draws on revolving consumer loans	(10,098)	(13,493)
Origination of mortgage loans receivable	(1,324,448)	0
Net settlement of derivatives	372,808	291,174
Return of investments in Excess MSRs	22,270	16,489
Return of investments in equity method investees	25,376	0
Principal repayments from servicer advance investments	419,513	464,921
Principal repayments from government, government, government-backed and other securities	400,802	305,887
Principal repayments from residential mortgage loans	24,022	21,364
Principal repayments from consumer loans	300,193	86,164
Loan originations and draws of consolidated CFEs	(4,766)	0
Proceeds from sale of MSRs and MSR financing receivables	(2,404)	424,034
Proceeds from sale of government, government-backed and other securities	0	1,869,053
Proceeds from sale of REO	13,612	13,175
Net cash provided by (used in) investing activities	(1,411,305)	(851,978)
Cash Flows From Financing Activities
Repayments of secured financing agreements	(39,071,785)	(24,321,697)
Repayments of warehouse credit facilities	(26,874,997)	(18,980,639)
Repayment of unsecured senior notes	(275,000)	0
Net settlement of margin deposits under repurchase agreements and derivatives	(502,647)	(411,796)
Repayments of secured notes and bonds payable	(2,959,966)	(3,538,076)
Deferred financing fees	(12,225)	(11,740)
Dividends paid on common and preferred stock	(286,596)	(284,262)
Borrowings under secured financing agreements	40,053,308	26,093,901
Borrowings under warehouse credit facilities	28,510,564	18,706,720
Borrowings under Notes Receivable Financing	352,683	0
Borrowings under secured notes and bonds payable	2,353,384	2,425,593
Proceeds from issuance of debt obligations of consolidated CFEs	874,615	150,586
Repayments of debt obligations of consolidated CFEs	(515,338)	(127,404)
Proceeds from issuance of unsecured senior notes	767,103	0
Issuance of common and preferred stock	69,250	0
Noncontrolling interest in equity of consolidated subsidiaries - contributions	32,435	0
Noncontrolling interest in equity of consolidated subsidiaries - distributions	(12,881)	(12,405)
Purchase of  noncontrolling interest in the SpringCastle Loans	(26,042)	0
Net cash provided by (used in) financing activities	2,475,865	(311,219)
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	(135,380)	68,327
Cash, Cash Equivalents and Restricted Cash, Beginning of Period	1,697,095	1,629,328
Cash, Cash Equivalents and Restricted Cash, End of Period	1,561,715	1,697,655
Supplemental Disclosure of Cash Flow Information
Cash paid during the period for interest	838,256	680,330
Cash paid during the period for income taxes	2,956	1,798
Supplemental Schedule of Non-Cash Investing and Financing Activities
Dividends declared but not paid on common and preferred stock	143,199	143,225
Transfer from residential mortgage loans to REO and other assets	8,841	14,662
Residential mortgage loans subject to repurchase	1,905,625	1,296,097
Cashless exercise of 2020 warrants (par)	0	93
Seller financing in Marcus loan acquisition	0	1,317,347
Consolidated Entity, Excluding Consolidated VIE
Cash Flows From Investing Activities
Principal repayments from mortgage loans receivable	798,720	0
Variable Interest Entity, Primary Beneficiary
Cash Flows From Investing Activities
Principal repayments from mortgage loans receivable	$ 236,753	$ 0