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Residential Whole Loans - Interest Income Components (Details) - Residential whole loan - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 165,717	$ 128,048	$ 323,382	$ 247,558
Business purpose loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	83,097	55,762	163,415	105,303
Business purpose loans | Single-family transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	30,242	18,749	58,260	35,061
Business purpose loans | Multifamily transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	25,291	13,872	50,489	25,787
Business purpose loans | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	27,564	23,141	54,666	44,455
Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	58,749	45,518	114,609	89,607
Legacy RPL/NPL loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	23,346	26,250	44,316	49,273
Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	525	518	1,042	3,375
Held at Carrying Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	22,412	24,258	44,113	48,758
Held at Carrying Value | Business purpose loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	2,429	3,398	5,231	6,997
Held at Carrying Value | Business purpose loans | Single-family transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	152	518	393	1,138
Held at Carrying Value | Business purpose loans | Multifamily transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	0	0	0	0
Held at Carrying Value | Business purpose loans | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	2,277	2,880	4,838	5,859
Held at Carrying Value | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	11,530	11,646	22,949	24,320
Held at Carrying Value | Legacy RPL/NPL loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	8,453	9,214	15,933	17,441
Held at Carrying Value | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	0	0	0	0
Held at Fair Value
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	143,305	103,790	279,269	198,800
Held at Fair Value | Business purpose loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	80,668	52,364	158,184	98,306
Held at Fair Value | Business purpose loans | Single-family transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	30,090	18,231	57,867	33,923
Held at Fair Value | Business purpose loans | Multifamily transitional loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	25,291	13,872	50,489	25,787
Held at Fair Value | Business purpose loans | Single-family rental loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	25,287	20,261	49,828	38,596
Held at Fair Value | Non-QM loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	47,219	33,872	91,660	65,287
Held at Fair Value | Legacy RPL/NPL loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	14,893	17,036	28,383	31,832
Held at Fair Value | Other loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 525	$ 518	$ 1,042	$ 3,375

X

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481990/310-10-45-2

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The aggregate interest and fee income generated by: (1) loans the Entity has positive intent and ability to hold for the foreseeable future, or until maturity or payoff, including commercial and consumer loans, whether domestic or foreign, which may consist of: (a) industrial and agricultural; (b) real estate; and (c) real estate construction loans; (d) trade financing; (e) lease financing; (f) home equity lines-of-credit; (g) automobile and other vehicle loans; and (h) credit card and other revolving-type loans and (2) loans and leases held-for-sale which may include mortgage loans, direct financing, and sales-type leases.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1

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