CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Cash Flows From Operating Activities:
Net Income		$ 4,620	$ 30,915
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Amortization of premiums, discounts, and debt issuance costs, net		5,818	(5,451)
Depreciation and amortization of non-financial assets		3,668	3,969
Originations of held-for-sale loans		(201,081)	(443,289)
Purchases of held-for-sale loans		(55,824)	(2,197,570)
Proceeds from sales of held-for-sale loans		368,633	2,176,422
Principal payments on held-for-sale loans		18,705	46,511
Net settlements of derivatives		(13,933)	67,200
Non-cash equity award compensation expense		6,342	8,170
Market valuation adjustments		(11,270)	1,859
Realized (gains) losses, net		2	(2,581)
Net change in:
Accrued interest receivable and other assets		(13,750)	31,070
Accrued interest payable and accrued expenses and other liabilities		(9,921)	(8,901)
Net cash provided by (used in) operating activities		102,009	(291,676)
Cash Flows From Investing Activities:
Originations of loan investments		(237,309)	(411,938)
Purchases of loan investments		0	(2,983)
Principal payments on loan investments		343,430	660,990
Purchases of real estate securities		0	(15,006)
Proceeds from sales of real estate securities		6,186	0
Principal payments on real estate securities		255	23,050
Repayments from servicer advance investments, net		7,529	45,005
Purchases of HEIs		(16,559)	(40,141)
Repayments on HEIs		7,754	12,671
Other investing activities, net		(557)	(1,151)
Net cash provided by investing activities		110,729	270,497
Cash Flows From Financing Activities:
Proceeds from borrowings on short-term debt		643,085	2,153,516
Repayments on short-term debt		(1,057,380)	(2,684,078)
Proceeds from issuance of asset-backed securities		594,327	680,749
Repayments on asset-backed securities issued		(267,449)	(535,568)
Proceeds from borrowings on long-term debt		126,760	630,865
Deferred long-term debt issuance costs paid		(308)	(532)
Repayments on long-term debt		(128,970)	(308,578)
Taxes paid on equity award distributions		(1,207)	(1,202)
Net proceeds from issuance of common stock		162	67,632
Net proceeds from issuance of preferred stock		66,923	0
Dividends paid on common stock		(27,559)	(28,788)
Other financing activities, net		0	(1,500)
Net cash used in financing activities		(51,616)	(27,484)
Net increase (decrease) in cash, cash equivalents and restricted cash		161,122	(48,663)
Cash, cash equivalents and restricted cash at beginning of period	[1]	329,364	531,484
Cash, cash equivalents, and restricted cash at end of period	[1]	490,486	482,821
Cash paid during the period for:
Interest		138,617	131,419
Taxes (refunded) paid		(1,388)	(41)
Supplemental Noncash Information:
Dividends declared but not paid on preferred stock		1,419	0
Retention of mortgage servicing rights from loan securitizations and sales		0	4,543
Transfers from loans held-for-sale to loans held-for-investment		873,093	1,098,459
Transfers from residential loans to real estate owned		8,014	1,319
Operating lease right-of-use assets obtained in exchange for operating lease liabilities		337	0
Reduction in operating lease liabilities due to lease modification		$ 274	$ 0

[1] Cash, cash equivalents, and restricted cash includes cash and cash equivalents of $404 million and restricted cash of $86 million at March 31, 2023, and includes cash and cash equivalents of $259 million and restricted cash of $70 million at December 31, 2022.