FAIR VALUE MEASUREMENTS - Schedule of Reconciliation of the Beginning and Ending Balances for Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Total
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 466,550	$ 347,814
Purchase of investments	1,078,253	159,853
Proceeds from principal repayments and sales of investments	(143,043)	(45,832)
Payment-in-kind interest	4,427	2,188
Amortization of premium/accretion of discount, net	(607)	819
Transfers out of level 3	(11,030)
Transfers to level 3	0	1,704
Ending balance	1,392,791	466,550
Net change in unrealized appreciation (depreciation) on non-controlled/non-affiliated company investments still held	(2,786)	(224)
Total | Net realized gain (loss) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	997	776
Total | Net change in unrealized appreciation (depreciation) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	(2,756)	(772)
First-Lien Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	354,396	249,667
Purchase of investments	1,043,167	137,949
Proceeds from principal repayments and sales of investments	(114,773)	(35,224)
Payment-in-kind interest	587	71
Amortization of premium/accretion of discount, net	(910)	577
Transfers out of level 3	(11,030)
Transfers to level 3	0	1,704
Ending balance	1,270,084	354,396
Net change in unrealized appreciation (depreciation) on non-controlled/non-affiliated company investments still held	(2,500)	(475)
First-Lien Debt | Net realized gain (loss) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	635	174
First-Lien Debt | Net change in unrealized appreciation (depreciation) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	(1,988)	(522)
Subordinated Debt
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	101,930	93,809
Purchase of investments	24,163	15,956
Proceeds from principal repayments and sales of investments	(27,056)	(10,216)
Payment-in-kind interest	3,840	2,117
Amortization of premium/accretion of discount, net	303	242
Transfers out of level 3	0
Transfers to level 3	0	0
Ending balance	102,993	101,930
Net change in unrealized appreciation (depreciation) on non-controlled/non-affiliated company investments still held	(235)	36
Subordinated Debt | Net realized gain (loss) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	74	311
Subordinated Debt | Net change in unrealized appreciation (depreciation) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	(261)	(289)
Equity Investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	10,224	4,338
Purchase of investments	10,923	5,948
Proceeds from principal repayments and sales of investments	(1,214)	(392)
Payment-in-kind interest	0	0
Amortization of premium/accretion of discount, net	0	0
Transfers out of level 3	0
Transfers to level 3	0	0
Ending balance	19,714	10,224
Net change in unrealized appreciation (depreciation) on non-controlled/non-affiliated company investments still held	(51)	215
Equity Investments | Net realized gain (loss) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	288	291
Equity Investments | Net change in unrealized appreciation (depreciation) on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total gains or losses included in earnings	$ (507)	$ 39