BORROWINGS - Narrative (Details) $ in Thousands	Jun. 12, 2026 USD ($)	Aug. 26, 2025 extension	Aug. 25, 2025	Oct. 18, 2024	Dec. 31, 2025 USD ($) investment	Dec. 12, 2025 USD ($)	Dec. 31, 2024 USD ($)	Oct. 29, 2024 USD ($)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Line of Credit Facility [Line Items]
Asset coverage ratio					275.20%		393.37%		246.17%	217.21%	220.61%	209.33%	213.72%	232.85%	236.17%
Secured borrowings					$ 1,005,834		$ 506,655
Interest and credit facility fees payable					6,164		6,104
2024-1 Issuer Preferred Interests
Line of Credit Facility [Line Items]
Investment owned, percentage received								100.00%
Investment owned, nominal value								$ 83,100
Secured Debt
Line of Credit Facility [Line Items]
Interest and credit facility fees payable					$ 2,920		$ 4,042
Weighted average interest rate					5.60%		6.35%
2024-1 Debt | Secured Debt
Line of Credit Facility [Line Items]
Debt instrument, face amount								348,500
Secured borrowings					$ 287,084		$ 286,923
Collateral, number of loans | investment					92
Collateral amount, debt instrument					$ 402,948
Collateral amount, cash					31,663
2024-1 Debt, Class C and D Notes | Secured Debt
Line of Credit Facility [Line Items]
Debt instrument, face amount								$ 59,500
Secured borrowings					59,500
Secured Debt | Line of Credit
Line of Credit Facility [Line Items]
Secured borrowings					1,005,834		506,655
Secured Debt | SPV Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity					400,000	$ 400,000	300,000
Number of extensions | extension		1
Extension term		1 year
Unused capacity commitment fee		0.75%
Interest and credit facility fees payable					$ 2,867		$ 1,071
Weighted average interest rate					5.50%		6.72%
Secured Debt | SPV Credit Facility | Line of Credit | Forecast
Line of Credit Facility [Line Items]
Additional maximum borrowing capacity	$ 100,000
Secured Debt | SPV Credit Facility | Line of Credit | SOFR
Line of Credit Facility [Line Items]
Basis spread on variable rate		2.06%	2.35%
Secured Debt | SPV2 Credit Facility | Line of Credit
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 550,000		$ 550,000
Unused capacity commitment fee				0.25%
Interest and credit facility fees payable					$ 377		$ 991
Weighted average interest rate					6.49%		7.14%
Secured Debt | SPV2 Credit Facility | Line of Credit | SOFR
Line of Credit Facility [Line Items]
Basis spread on variable rate				2.40%
Secured Debt | SPV2 Credit Facility | Line of Credit | Federal Funds Rate
Line of Credit Facility [Line Items]
Basis spread on variable rate				0.50%
Secured Debt | SPV2 Credit Facility | Line of Credit | SOFR Adjustment
Line of Credit Facility [Line Items]
Basis spread on variable rate				0.15%