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Net Interest Income - Components of Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest income	$ 68,920	$ 52,323	$ 195,441	$ 154,548
Interest expense	54,699	21,292	125,212	61,702
Total net interest income (expense)	14,221	31,031	70,229	92,846
Convertible notes
Interest expense	0	2,810	438	8,382
Senior unsecured notes
Senior unsecured notes	1,608	1,598	4,818	2,734
Subordinated debentures
Subordinated debentures	704	458	1,713	1,374
Residential loans
Interest income	32,374	20,480	89,875	60,295
Consolidated SLST | VIE, Primary Beneficiary
Interest income	9,013	10,245	27,648	31,042
Interest expense	6,611	7,116	18,796	21,371
Residential loans held in securitization trusts
Interest income	20,437	11,008	55,923	28,909
Total residential loans
Interest income	61,824	41,733	173,446	120,246
Multi-family loans
Interest income	2,862	3,449	8,646	11,980
Investment securities available for sale
Investment securities available for sale	3,916	7,129	12,922	22,279
Other
Other	318	12	427	43
Repurchase agreements
Interest expense	18,448	3,110	35,625	10,884
Residential loan securitizations
Interest expense	11,192	5,053	27,377	14,788
Non-Agency RMBS Re-Securitization
Interest expense	0	0	0	283
Total collateralized debt obligations
Interest expense	17,803	12,169	46,173	36,442
Mortgages payable on real estate
Mortgages payable on real estate	$ 16,136	$ 1,147	$ 36,445	$ 1,886

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- Definition

Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein.

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Interest expense on medium-Term notes.

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