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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, 2024	Mar. 31, 2023
Interest income	$ 83,892	$ 57,136
Interest expense	66,029	39,335
Total net interest income	17,863	17,801
Senior unsecured notes
Senior unsecured notes	1,626	1,614
Subordinated debentures
Subordinated debentures	1,073	962
Residential loans
Interest income	11,689	16,954
Consolidated SLST | VIE, Primary Beneficiary
Interest income	8,127	8,733
Interest expense	5,801	6,315
Residential loans held in securitization trusts
Interest income	26,931	24,721
Total residential loans
Interest income	46,747	50,408
Investment securities available for sale
Investment securities available for sale	32,903	3,169
Multi-family loans
Interest income	2,642	2,436
Other
Other	1,600	1,123
Repurchase agreements
Interest expense	39,153	13,068
Residential Loan Securitizations
Interest expense	18,376	17,376
Total collateralized debt obligations
Interest expense	$ 24,177	$ 23,691

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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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