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Net Interest Income - Schedule of Components of Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Interest income	$ 57,136	$ 58,501
Interest expense	39,335	21,465
Total net interest income	17,801	37,036
Convertible notes
Interest expense	0	438
Senior unsecured notes
Senior unsecured notes	1,614	1,603
Subordinated debentures
Subordinated debentures	962	459
Residential loans
Interest income	16,954	24,834
Consolidated SLST | VIE, Primary Beneficiary
Interest income	8,733	9,380
Interest expense	6,315	5,978
Residential loans held in securitization trusts
Interest income	24,721	16,633
Total residential loans
Interest income	50,408	50,847
Multi-family loans
Interest income	2,436	2,951
Investment securities available for sale
Investment securities available for sale	3,169	4,675
Other
Other	1,123	28
Repurchase agreements
Interest expense	13,068	5,531
Residential loan securitizations
Interest expense	17,376	7,456
Total collateralized debt obligations
Interest expense	$ 23,691	$ 13,434

X

- 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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