Consolidated Securitization Vehicles and Other Variable Interest Entities - Assets and Liabilities Related to the Consolidated VIEs (Details) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Assets:
Non-Agency RMBS, at fair value		$ 1,059,840	$ 1,064,169
Loans held for investment, at fair value		10,983,840	11,196,678
Accrued interest receivable		84,082	81,386
Other assets		167,880	170,924
Total assets	[1]	13,205,326	13,116,490
Liabilities:
Securitized debt, collateralized by Non-Agency RMBS		69,990	71,247
Securitized debt at fair value, collateralized by Loans held for investment		7,198,089	6,984,495
Accrued interest payable		38,164	41,472
Other liabilities		53,030	45,075
Total liabilities	[1]	10,561,262	10,590,301
Allowance for credit losses		31,785	28,397	$ 19,907	$ 18,560
Variable Interest Entities, Primary Beneficiary
Assets:
Non-Agency RMBS, at fair value		224,670	229,343
Loans held for investment, at fair value		9,832,227	9,671,731
Accrued interest receivable		49,962	50,305
Other assets		23,435	18,715
Total assets		10,130,294	9,970,094
Liabilities:
Securitized debt, collateralized by Non-Agency RMBS		69,990	71,247
Securitized debt at fair value, collateralized by Loans held for investment		6,895,501	6,671,471
Accrued interest payable		23,340	21,803
Other liabilities		1,541	1,984
Total liabilities		6,990,372	6,766,505
Allowance for credit losses		$ 11,000	$ 10,000

[1] The Company's consolidated statements of financial condition include assets of consolidated variable interest entities, or VIEs, that can only be used to settle obligations and liabilities of the VIE for which creditors do not have recourse to the primary beneficiary (Chimera Investment Corporation). As of March 31, 2025, and December 31, 2024, total assets of consolidated VIEs were $10,130,294 and $9,970,094, respectively, and total liabilities of consolidated VIEs were $6,990,372 and $6,766,505, respectively. See Note 9 for further discussion.