Net Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total interest income	$ 258,660	$ 258,388	$ 206,866
Total interest expense	192,134	129,419	79,284
Total net interest income	66,526	128,969	127,582
Senior unsecured notes
Senior unsecured notes	6,476	6,430	4,335
Subordinated debentures
Subordinated debentures	4,154	2,590	1,831
Convertible notes
Interest expense	0	438	11,196
Residential loans
Interest income	54,188	113,134	83,852
Consolidated SLST \| VIE, Primary Beneficiary
Interest income	34,061	36,448	40,944
Interest expense	24,506	25,145	28,135
Residential loans held in securitization trusts
Interest income	97,492	80,116	38,941
Total residential loans
Interest income	185,741	229,698	163,737
Investment securities available for sale
Investment securities available for sale	57,514	15,825	27,750
Multi-family loans
Interest income	10,519	11,185	15,321
Other
Other	4,886	1,680	58
Repurchase agreements
Interest expense	91,814	51,432	13,844
Residential Loan Securitizations
Interest expense	65,184	43,384	19,660
Non-Agency RMBS re-securitization
Interest expense	0	0	283
Total collateralized debt obligations
Interest expense	$ 89,690	$ 68,529	$ 48,078

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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