RESTATEMENT OF PREVIOUSLY ISSUED FINANCIAL STATEMENTS - Income Statement (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	$ 1,184,758	$ 824,788
Total revenues	1,260,618	824,788
Expenses
Interest expense and warehouse line fees	409,827	304,215
General and administrative	197,194	167,479
Compensation and benefits	235,778	188,880
Total operating expenses	842,799	660,574
Other Income (Loss)
Realized and unrealized gains (losses), net	(44,846)	(65,905)
Other income (loss), net	7,926	(25,166)
Total other income (loss)	(36,920)	(91,071)
Income (loss) before income taxes	380,899	73,143
Income tax expense (benefit)	93,412	(16,806)
Net income (loss)	287,487	89,949
Noncontrolling interests in income (loss) of consolidated subsidiaries	3,452	(1,300)
Dividends on preferred stock	22,395	22,395
Net income (loss) attributable to common stockholders - basic	$ 261,640	$ 68,854
Net Income (loss) per share of common stock
Basic (in dollars per share)	$ 0.54	$ 0.14
Diluted (in dollars per share)	$ 0.54	$ 0.14
Weighted average number of shares of common stock outstanding
Basic (in shares)	483,336,777	478,167,178
Diluted (in shares)	485,931,501	482,846,911
Dividends declared per share of common stock (in dollars per share)	$ 0.25	$ 0.25
As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	$ 1,210,450
Total revenues	1,286,310
Expenses
Interest expense and warehouse line fees	414,365
General and administrative	195,118
Compensation and benefits	235,778
Total operating expenses	845,261
Other Income (Loss)
Realized and unrealized gains (losses), net	(68,134)
Other income (loss), net	7,984
Total other income (loss)	(60,150)
Income (loss) before income taxes	380,899
Income tax expense (benefit)	93,412
Net income (loss)	287,487
Noncontrolling interests in income (loss) of consolidated subsidiaries	3,452
Dividends on preferred stock	22,395
Net income (loss) attributable to common stockholders - basic	$ 261,640
Net Income (loss) per share of common stock
Basic (in dollars per share)	$ 0.54
Diluted (in dollars per share)	$ 0.54
Weighted average number of shares of common stock outstanding
Basic (in shares)	483,336,777
Diluted (in shares)	485,931,501
Dividends declared per share of common stock (in dollars per share)	$ 0.25
Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	$ (16,747)
Total revenues	(16,747)
Expenses
Interest expense and warehouse line fees	0
General and administrative	2,076
Compensation and benefits	0
Total operating expenses	2,076
Other Income (Loss)
Realized and unrealized gains (losses), net	18,881
Other income (loss), net	(58)
Total other income (loss)	18,823
Income (loss) before income taxes	0
Income tax expense (benefit)	0
Net income (loss)	0
Noncontrolling interests in income (loss) of consolidated subsidiaries	0
Dividends on preferred stock	0
Net income (loss) attributable to common stockholders - basic	$ 0
Net Income (loss) per share of common stock
Basic (in dollars per share)	$ 0
Diluted (in dollars per share)	$ 0
Weighted average number of shares of common stock outstanding
Basic (in shares)	0
Diluted (in shares)	0
Dividends declared per share of common stock (in dollars per share)	$ 0
Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	$ 1,193,703
Total revenues	1,269,563
Expenses
Interest expense and warehouse line fees	414,365
General and administrative	197,194
Compensation and benefits	235,778
Total operating expenses	847,337
Other Income (Loss)
Realized and unrealized gains (losses), net	(49,253)
Other income (loss), net	7,926
Total other income (loss)	(41,327)
Income (loss) before income taxes	380,899
Income tax expense (benefit)	93,412
Net income (loss)	287,487
Noncontrolling interests in income (loss) of consolidated subsidiaries	3,452
Dividends on preferred stock	22,395
Net income (loss) attributable to common stockholders - basic	$ 261,640
Net Income (loss) per share of common stock
Basic (in dollars per share)	$ 0.54
Diluted (in dollars per share)	$ 0.54
Weighted average number of shares of common stock outstanding
Basic (in shares)	483,336,777
Diluted (in shares)	485,931,501
Dividends declared per share of common stock (in dollars per share)	$ 0.25
Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	$ (8,945)
Total revenues	(8,945)
Expenses
Interest expense and warehouse line fees	(4,538)
General and administrative	0
Compensation and benefits	0
Total operating expenses	(4,538)
Other Income (Loss)
Realized and unrealized gains (losses), net	4,407
Other income (loss), net	0
Total other income (loss)	4,407
Income (loss) before income taxes	0
Income tax expense (benefit)	0
Net income (loss)	0
Noncontrolling interests in income (loss) of consolidated subsidiaries	0
Dividends on preferred stock	0
Net income (loss) attributable to common stockholders - basic	$ 0
Net Income (loss) per share of common stock
Basic (in dollars per share)	$ 0
Diluted (in dollars per share)	$ 0
Weighted average number of shares of common stock outstanding
Basic (in shares)	0
Diluted (in shares)	0
Dividends declared per share of common stock (in dollars per share)	$ 0
MSRs
Weighted average number of shares of common stock outstanding
Realization of cash flows	$ (116,839)	$ (105,691)
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	469,891	469,657
Servicing fee revenue, net and interest income from MSRs and MSR financing receivables | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	470,203
Servicing fee revenue, net and interest income from MSRs and MSR financing receivables | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	(312)
Servicing fee revenue, net and interest income from MSRs and MSR financing receivables | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	469,891
Servicing fee revenue, net and interest income from MSRs and MSR financing receivables | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Change in fair value of MSRs and MSR financing receivables (includes realization of cash flows of $(116,839) and $(105,691), respectively)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	84,175	(142,304)
Change in fair value of MSRs and MSR financing receivables (includes realization of cash flows of $(116,839) and $(105,691), respectively) | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	84,175
Change in fair value of MSRs and MSR financing receivables (includes realization of cash flows of $(116,839) and $(105,691), respectively) | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Change in fair value of MSRs and MSR financing receivables (includes realization of cash flows of $(116,839) and $(105,691), respectively) | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	84,175
Change in fair value of MSRs and MSR financing receivables (includes realization of cash flows of $(116,839) and $(105,691), respectively) | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Servicing revenue, net
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	554,066	327,353
Servicing revenue, net | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	554,378
Servicing revenue, net | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	(312)
Servicing revenue, net | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	554,066
Servicing revenue, net | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Interest income
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	429,886	330,023
Interest income | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	448,179
Interest income | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	(9,348)
Interest income | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	438,831
Interest income | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	(8,945)
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	142,458	109,268
Gain on originated residential mortgage loans, held-for-sale, net | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	149,545
Gain on originated residential mortgage loans, held-for-sale, net | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	(7,087)
Gain on originated residential mortgage loans, held-for-sale, net | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	142,458
Gain on originated residential mortgage loans, held-for-sale, net | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Other revenues
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	58,348	58,144
Other revenues | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	58,348
Other revenues | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Other revenues | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	58,348
Other revenues | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate	0
Asset management revenues
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Total revenues	75,860	$ 0
Asset management revenues | As Reported (Unaudited)
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Total revenues	75,860
Asset management revenues | Error Adjustments
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Total revenues	0
Asset management revenues | Subtotal
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Total revenues	75,860
Asset management revenues | Reclassifications
Origination and Servicing, Investment Portfolio, Mortgage Loans Receivable and Corporate
Total revenues	$ 0