Collateralized Loan Obligation Leverage Ratio

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- Definition

Debt Instrument, Number of Tranches

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- Definition

Debt Weighted Average, Excluding Fees and Transaction Costs, Term

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- Definition

Financing Initial Reinvestment Period

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Financing Receivable, Outstanding, Face Amount

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- Definition

Initial Investment Period

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- Definition

Number of Newly Formed Subsidiaries

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- Definition

Period to Acquire Additional Loan Obligations from Closing Date

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- Definition

Proceeds from Issuance of Long-Term Debt Allocated To Acquire Additional Loan Obligations

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- Definition

Variable Interest Entity, Qualitative and Quantitative Information, Equity Interest

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Weighted average interest rate of debt outstanding.

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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- Definition

Fair value portion of interest continued to be held by a transferor after transferring financial assets to a third party.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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USE OF SPECIAL PURPOSE ENTITIES AND VARIABLE INTEREST ENTITIES - Narrative (Details)	Jul. 12, 2023 USD ($)	Jun. 14, 2021 USD ($) tranche subsidiary	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Variable Interest Entity [Line Items]
Number of newly formed subsidiaries \| subsidiary		2
Equity interest retained		$ 96,250,000
Proceeds from issuance of long-term debt allocated to acquire additional loan obligations		$ 330,300,000
Period to acquire additional loan obligations from closing date		180 days
Collateralized loan obligation leverage ratio (as a percent)		0.83
Secured Overnight Financing Rate
Variable Interest Entity [Line Items]
Initial weighted average spread	3.14%
Period of initial weighted average spread	30 days
Commercial Real Estate Portfolio Segment
Variable Interest Entity [Line Items]
Face amount of debt			$ 1,397,385,160	$ 1,076,865,099
LMF 2023-1 Financing \| Internal Investment Grade
Variable Interest Entity [Line Items]
Face amount of debt	$ 47,300,000
LMF 2023-1 Financing \| Internal Investment Grade \| Private Placement
Variable Interest Entity [Line Items]
Face amount of debt	270,400,000
LMF 2023-1 Financing \| Multi-family \| Commercial Real Estate Portfolio Segment \| Internal Investment Grade
Variable Interest Entity [Line Items]
Face amount of debt	386,400,000
Lument Finance Trust
Variable Interest Entity [Line Items]
Subordinated interest retained	$ 68,600,000
Financing initial reinvestment period	2 years
Collateralized Loan Obligations - LFT CRE 2021-FL1, Ltd.
Variable Interest Entity [Line Items]
Debt instrument, number of tranches \| tranche		8
Debt instrument, face amount		$ 903,800,000
Initial investment period		2 years 6 months
Proceeds from issuance of collateralized loan obligations		$ 1,000,000,000
Collateralized Loan Obligations - LFT CRE 2021-FL1, Ltd. - Investment Grade
Variable Interest Entity [Line Items]
Debt instrument, face amount		833,800,000
Collateralized Loan Obligations - LFT CRE 2021-FL1, Ltd. - Below Investment Grade
Variable Interest Entity [Line Items]
Debt instrument, face amount		$ 70,000,000