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Fair Value of Financial Instruments - Carrying Value vs Fair Value (Details) - USD ($) $ in Thousands		Jun. 30, 2024	Apr. 17, 2024	Jan. 11, 2024	Dec. 31, 2023
Financial Assets:
Fair Value	[1]	$ 863,289			$ 746,090
Restricted cash		$ 252,015			170,211
8.875% Senior Notes Due 2029 | Senior Notes
Financial Liabilities:
Stated interest rate (as a percent)		8.875%		8.875%
9.00% Senior Notes Due 2029 | Senior Notes
Financial Liabilities:
Stated interest rate (as a percent)		9.00%	9.00%
Carrying Value | Level 2
Financial Assets:
Fair Value		$ 863,289			746,090
Financial Liabilities:
Securitized debt		5,047,613			4,750,805
Convertible senior notes		0			208,989
Carrying Value | Level 2 | 8.875% Senior Notes Due 2029
Financial Liabilities:
Senior notes		110,912			0
Carrying Value | Level 2 | 9.00% Senior Notes Due 2029
Financial Liabilities:
Senior notes		72,175			0
Carrying Value | Level 1
Financial Assets:
Cash and cash equivalents		289,412			318,000
Restricted cash		252,015			170,211
Estimated Fair Value | Level 2
Financial Assets:
Fair Value		863,289			746,090
Financial Liabilities:
Securitized debt		4,965,310			4,655,195
Convertible senior notes		0			209,065
Estimated Fair Value | Level 2 | 8.875% Senior Notes Due 2029
Financial Liabilities:
Senior notes		114,478			0
Estimated Fair Value | Level 2 | 9.00% Senior Notes Due 2029
Financial Liabilities:
Senior notes		74,903			0
Estimated Fair Value | Level 1
Financial Assets:
Cash and cash equivalents		289,412			318,000
Restricted cash		252,015			170,211
Residential whole loan
Financial Assets:
Securities, at fair value		7,772,607			7,511,508
Residential whole loan | Level 3
Financial Assets:
Securities, at fair value		7,719,191			7,455,729
Residential whole loan | Level 2
Financial Assets:
Securities, at fair value		53,416			55,779
Residential whole loan | Level 1
Financial Assets:
Securities, at fair value		0			0
Residential whole loan | Carrying Value | Level 3
Financial Assets:
Securities, at fair value		9,132,820			8,985,513
Residential whole loan | Carrying Value | Level 2
Financial Assets:
Securities, at fair value		53,416			55,779
Residential whole loan | Estimated Fair Value | Level 3
Financial Assets:
Securities, at fair value		9,105,970			8,949,859
Residential whole loan | Estimated Fair Value | Level 2
Financial Assets:
Securities, at fair value		53,416			55,779
Securities, at fair value
Financial Assets:
Securities, at fair value		863,289			746,090
Securities, at fair value | Level 3
Financial Assets:
Securities, at fair value		0			0
Securities, at fair value | Level 2
Financial Assets:
Securities, at fair value		863,289			746,090
Securities, at fair value | Level 1
Financial Assets:
Securities, at fair value		0			0
Financing agreements with non-mark-to-market collateral provisions | Carrying Value | Level 3
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		931,146			1,216,697
Financing agreements with non-mark-to-market collateral provisions | Estimated Fair Value | Level 3
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		932,031			1,217,671
Agreements with mark-to-market collateral provisions | Carrying Value | Level 3
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		1,998,352			1,737,652
Agreements with mark-to-market collateral provisions | Estimated Fair Value | Level 3
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		1,999,166			1,738,543
Financing agreements with mark-to-market collateral provisions | Carrying Value | Level 2
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		730,844			622,603
Financing agreements with mark-to-market collateral provisions | Estimated Fair Value | Level 2
Financial Liabilities:
Financing agreements with mark-to-market collateral provisions		$ 730,844			$ 622,603
[1] See Note 6 for information regarding the Company’s pledged assets.

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