CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	1 Months Ended			3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues						$ 1,110,339	$ 824,788	$ 753,909	$ 903,604	$ 1,317,625	$ 1,716,306	$ 1,935,127	$ 3,033,302	$ 3,070,533		$ 3,679,506	$ 4,920,801	$ 3,728,562
Total revenues				$ 691,654	$ 1,135,405											3,762,187	4,920,801	3,728,562
Expenses
Interest expense and warehouse line fees				395,349	377,528	324,235	304,215	278,769	213,543	146,690	138,791	628,450	285,481	1,005,978	$ 499,024	1,401,327	777,793	497,308
General and administrative				192,380	190,691	181,918	167,479	189,646	215,075	225,758	246,664	349,397	472,422	540,088	687,497	732,469	877,143	865,801
Compensation and benefits				222,457	186,149	189,606	188,880	208,185	290,984	339,658	392,619	378,486	732,277	564,635	1,023,261	787,092	1,231,446	1,159,810
Management fee to affiliate									0	20,985	25,189		46,174		46,174	0	46,174	95,926
Termination fee to affiliate									0	400,000			400,000		400,000	0	400,000	0
Total operating expenses				810,186	754,368	695,759	660,574	676,600	719,602	1,133,091	803,263	1,356,333	1,936,354	2,110,701	2,655,956	2,920,888	3,332,556	2,618,845
Other income (loss)
Realized and unrealized gains (losses), net				84,065	(114,149)	76,533	(65,905)	14,127	(30,970)	(137,901)	(72,655)	10,628	(209,927)	(103,522)	(240,898)	(19,456)	(180,059)	(149,150)
Other income (loss), net				(2,834)	6,888	(47,898)	(25,166)	(3,650)	23,242	59,388	52,332	(73,064)	111,720	(66,176)	134,962	(69,010)	(145,385)	3,241
Total other income (loss)				81,231	(107,261)	28,635	(91,071)	10,477	(7,728)	(78,513)	(20,323)	(62,436)	(98,207)	(169,698)	(105,936)	(88,466)	(325,444)	(145,909)
Income (loss) before income taxes				(37,301)	273,776	443,215	73,143	87,786	176,274	106,021	892,720	516,358	998,741	790,134	1,175,015	752,833	1,262,801	963,808
Income tax expense				29,850	52,585	56,530	(16,806)	(18,047)	22,084	72,690	202,789	39,724	275,479	92,309	297,563	122,159	279,516	158,226
Net income (loss)				(67,151)	221,191	386,685	89,949	105,833	154,190	33,331	689,931	476,634	723,262	697,825	877,452	630,674	983,285	805,582
Noncontrolling interests in income of consolidated subsidiaries				(2,020)	4,848	6,889	(1,300)	1,668	7,307	14,182	5,609	5,589	19,791	10,437	27,098	8,417	28,766	33,356
Dividends on preferred stock				22,395	22,394	22,395	22,395	22,411	22,427	22,427	22,461	44,790	44,888	67,184	67,315	89,579	89,726	66,744
Net income (loss) attributable to common stockholders - basic				$ (87,526)	$ 193,949	$ 357,401	$ 68,854	$ 81,754	$ 124,456	$ (3,278)	$ 661,861	$ 426,255	$ 658,583	$ 620,204	$ 783,039	$ 532,678	$ 864,793	$ 705,482
Net income (loss) per share of common stock
Basic (in dollars per share)				$ (0.18)	$ 0.40	$ 0.74	$ 0.14	$ 0.17	$ 0.27	$ (0.01)	$ 1.42	$ 0.89	$ 1.41	$ 1.29	$ 1.68	$ 1.11	$ 1.84	$ 1.56
Diluted (in dollars per share)				$ (0.18)	$ 0.40	$ 0.74	$ 0.14	$ 0.17	$ 0.26	$ (0.01)	$ 1.37	$ 0.88	$ 1.36	$ 1.28	$ 1.62	$ 1.10	$ 1.80	$ 1.51
Weighted average number of shares of common stock outstanding
Basic (in shares)				483,214,458	483,214,061	483,091,792	478,167,178	473,715,100	467,974,962	466,804,548	466,785,584	480,642,680	466,795,119	481,503,762	467,192,721	481,934,951	468,836,718	451,276,742
Diluted (in shares)				484,270,098	484,350,288	483,376,961	482,846,911	480,852,723	476,796,757	466,804,548	484,425,066	483,113,400	484,494,108	483,530,227	481,900,129	483,716,715	481,636,125	467,665,006
Dividends declared per share of common stock (in dollars per share)	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.25	$ 0.50	$ 0.50	$ 0.75	$ 0.75	$ 1.00	$ 1.00	$ 0.90
Servicing fee revenue, net and interest income from MSRs and MSR financing receivables
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues				$ 481,928	$ 442,425	$ 465,347	$ 469,657	$ 452,758	$ 452,990	$ 469,342	$ 456,264	$ 935,004	$ 925,606	$ 1,377,429	$ 1,378,596	$ 1,859,357	$ 1,831,354	$ 1,558,823
Change in fair value of MSRs and MSR financing receivables (includes realization of cash flows of $(518,978), $(631,120) and $(1,192,646), respectively)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues				(466,346)	20,934	22,032	(142,304)	(162,028)	(19,174)	334,690	575,393	(120,272)	909,454	(99,338)	890,281	(565,684)	727,334	(577,763)
Servicing revenue, net
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues				15,582	463,359	487,379	327,353	290,730	433,816	804,032	1,031,657	814,732	1,835,060	1,278,091	2,268,877	1,293,673	2,558,688	981,060
Interest income
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues				438,501	462,497	385,167	330,023	351,794	261,902	202,023	222,741	715,190	424,764	1,177,688	686,666	1,616,189	1,038,459	794,171
Gain on originated residential mortgage loans, held-for-sale, net
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues				96,395	149,230	178,584	109,268	$ 111,385	$ 207,886	$ 311,570	$ 461,908	287,852	$ 773,478	437,082	981,364	533,477	1,092,749	1,787,851
Other revenues
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate revenues				58,495	$ 60,319	$ 59,209	$ 58,144					$ 117,353		$ 177,672	$ 3,936,907	236,167	230,905	165,480
Asset management revenues
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Total revenues				$ 82,681												$ 82,681	$ 0	$ 0