CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Interest Income
Residential loans	$ 53,993	$ 44,921	$ 146,081	$ 179,331
Business purpose loans	67,129	55,637	201,640	161,710
Multifamily loans	4,846	4,918	14,492	49,960
Real estate securities	14,242	10,135	33,184	38,471
Other interest income	5,512	6,371	17,325	20,537
Total interest income	145,722	121,982	412,722	450,009
Interest Expense
Short-term debt	(11,826)	(5,145)	(30,794)	(45,119)
Asset-backed securities issued	(73,732)	(66,514)	(222,712)	(232,316)
Long-term debt	(18,196)	(28,752)	(60,865)	(72,313)
Total interest expense	(103,754)	(100,411)	(314,371)	(349,748)
Net Interest Income	41,968	21,571	98,351	100,261
Non-interest Income (Loss)
Mortgage banking activities, net	63,163	59,395	200,189	24,511
Investment fair value changes, net	26,077	107,047	120,644	(611,557)
Other income, net	2,388	(114)	8,357	3,979
Realized gains, net	6,703	602	17,803	30,419
Total non-interest income (loss), net	98,331	166,930	346,993	(552,648)
General and administrative expenses	(47,692)	(27,630)	(131,837)	(84,832)
Loan acquisition costs	(4,621)	(2,158)	(11,928)	(7,716)
Other expenses	(4,023)	(7,788)	(12,104)	(104,286)
Net Income (Loss) before (Provision for) Benefit from Income Taxes	83,963	150,925	289,475	(649,221)
Benefit from (provision for) income taxes	4,323	(9,113)	(13,907)	13,079
Net Income (Loss)	$ 88,286	$ 141,812	$ 275,568	$ (636,142)
Basic earnings (loss) per common share (in dollars per share)	$ 0.75	$ 1.21	$ 2.36	$ (5.60)
Diluted earnings (loss) per common share (in dollars per share)	$ 0.65	$ 1.02	$ 2.03	$ (5.60)
Basic weighted average shares outstanding (in shares)	112,995,847	113,403,102	112,754,691	113,952,308
Diluted weighted average shares outstanding (in shares)	141,855,471	141,969,977	141,575,385	113,952,308