CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities:
Net income	$ 247,101	$ 251,431
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	6,092	5,349
Stock-based compensation	12,330	7,986
Amortization and accretion of interest and fees, net	(10,022)	119
Amortization of capitalized mortgage servicing rights	44,532	43,744
Originations of loans held-for-sale	(3,232,962)	(4,558,811)
Proceeds from sales of loans held-for-sale, net of gain on sale	3,699,555	4,330,959
Mortgage servicing rights	(52,287)	(95,688)
Write-off of capitalized mortgage servicing rights from payoffs	37,318	18,344
Provision for loss sharing (net of recoveries)	(2,199)	(1,070)
Provision for credit losses (net of recoveries)	9,700	(12,689)
Net charge-offs for loss sharing obligations	(354)	(411)
Deferred tax (benefit) provision	(7,833)	10,692
Income from equity affiliates	(18,507)	(32,095)
Distributions from operations of equity affiliates	16,546	25,450
Loss on extinguishment of debt	4,612	1,370
Payoffs and paydowns of loans held-for-sale	58,339	2,375
Loss on sale of loans	10,120
Change in fair value of held-for-sale loans	12,163
Changes in operating assets and liabilities	(23,138)	2,543
Net cash provided by (used in) operating activities	811,106	(402)
Investing Activities:
Loans and investments funded, originated and purchased, net	(5,418,113)	(5,174,313)
Payoffs and paydowns of loans and investments	2,302,874	1,345,559
Proceeds from sale of loans and investments	397,338	110,000
Deferred fees	50,385	41,475
Contributions to equity affiliates	(16,730)	(38,604)
Distributions from equity affiliates	24,321	27,675
Purchase of securities held-to-maturity, net	(27,598)	(23,747)
Payoffs and paydowns of securities held-to-maturity	16,676	9,760
Due to borrowers and reserves	(152,036)	(53,929)
Net cash used in investing activities	(2,822,883)	(3,756,124)
Financing activities:
Proceeds from credit and repurchase facilities	8,474,821	10,494,663
Paydowns and payoffs of credit and repurchase facilities	(8,325,608)	(9,328,154)
Proceeds from issuance of collateralized loan obligations	2,525,624	2,567,387
Payoffs and paydowns of collateralized loan obligations	(441,000)	(356,150)
Proceeds from issuance of common stock	312,766	342,618
Proceeds from issuance of preferred stock	77,392	361,471
Extinguishment of convertible senior unsecured notes	(200,662)
Proceeds from issuance of convertible senior unsecured notes	287,500
Proceeds from issuance of senior unsecured notes		445,000
Settlements of convertible senior unsecured notes		(14,300)
Redemption of preferred stock		(92,788)
Redemption of operating partnership units	(546)	(21,110)
Payments of withholding taxes on net settlement of vested stock	(8,085)	(8,921)
Repurchase of common stock		(23,460)
Distributions to stockholders	(234,246)	(161,404)
Payment of deferred financing costs	(35,267)	(34,666)
Net cash provided by financing activities	2,432,689	4,170,186
Net increase in cash, cash equivalents and restricted cash	420,912	413,660
Cash, cash equivalents and restricted cash at beginning of period	891,270	536,998
Cash, cash equivalents and restricted cash at end of period	1,312,182	950,658
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents at beginning of period	404,580	339,528
Restricted cash at beginning of period	486,690	197,470
Cash, cash equivalents and restricted cash at beginning of period	891,270	536,998
Cash and cash equivalents at end of period	389,651	380,730
Restricted cash at end of period	922,531	569,928
Cash, cash equivalents and restricted cash at end of period	1,312,182	950,658
Supplemental cash flow information:
Cash used to pay interest	306,671	119,978
Cash used to pay taxes	25,770	37,436
Supplemental schedule of non-cash investing and financing activities:
Distributions accrued on preferred stock	7,010	3,732
Cummulative-effect adjustment (Note 2)	$ 2,447
Loans transferred from loans and investment, net to loans held-for-sale		$ 65,204