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Net Interest Income - Components of Interest Income and Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Interest income	$ 68,020	$ 52,186	$ 126,521	$ 102,225
Interest expense	41,891	20,711	70,513	40,410
Total net interest income (expense)	26,129	31,475	56,008	61,815
Convertible notes
Interest expense	0	2,788	438	5,572
Senior unsecured notes
Senior unsecured notes	1,607	1,136	3,210	1,136
Subordinated debentures
Subordinated debentures	550	459	1,008	916
Residential loans
Interest income	32,669	20,155	57,502	39,816
Consolidated SLST | VIE, Primary Beneficiary
Interest income	9,254	10,479	18,635	20,797
Interest expense	6,208	7,151	12,186	14,254
Residential loans held in securitization trusts
Interest income	18,853	9,933	35,486	17,901
Total residential loans
Interest income	60,776	40,567	111,623	78,514
Multi-family loans
Interest income	2,834	4,130	5,785	8,531
Investment securities available for sale
Investment securities available for sale	4,331	7,475	9,006	15,150
Other
Other	79	14	107	30
Repurchase agreements
Interest expense	11,647	3,732	17,178	7,774
Residential loan securitizations
Interest expense	8,728	5,015	16,185	9,735
Non-Agency RMBS Re-Securitization
Interest expense	0	0	0	283
Total collateralized debt obligations
Interest expense	14,936	12,166	28,371	24,272
Mortgages payable on real estate
Mortgages payable on real estate	$ 13,151	$ 430	$ 20,308	$ 740

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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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Amount of the cost of borrowed funds accounted for as interest expense.

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Interest expense on medium-Term notes.

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