SECURED BORROWINGS - Schedule of Components of Interest Expense and Debt Financing Expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
Borrowing interest expense	$ 22,287	$ 15,166	$ 55,313	$ 40,816
Unused fees	232	342	909	849
Amortization of deferred financing costs	679	540	2,638	1,424
Total interest and debt financing expenses	$ 23,198	$ 16,048	$ 58,860	$ 43,089
Average interest rate	7.74%	7.51%	7.70%	7.17%
Average daily borrowings	$ 1,156,703	$ 819,047	$ 974,676	$ 777,454
Subscription Facility | Credit Facility | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	0	252	0	611
Unused fees	0	14	0	64
Amortization of deferred financing costs	0	25	0	108
Total interest and debt financing expenses	0	291	0	783
Wells Fargo Financing Facility | Credit Facility | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	1,783	3,207	5,596	7,926
Unused fees	109	135	285	494
Amortization of deferred financing costs	73	122	941	361
Total interest and debt financing expenses	1,965	3,464	6,822	8,781
SMBC Financing Facility | Credit Facility | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	3,582	5,322	5,680	14,636
Unused fees	18	24	187	105
Amortization of deferred financing costs	112	129	333	383
Total interest and debt financing expenses	3,712	5,475	6,200	15,124
Revolving Credit Facility | Credit Facility | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	2,377	279	4,091	279
Unused fees	105	169	437	186
Amortization of deferred financing costs	130	113	360	123
Total interest and debt financing expenses	2,612	561	4,888	588
CLO-I | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	6,204	6,106	18,390	17,364
Unused fees	0	0	0	0
Amortization of deferred financing costs	152	151	452	449
Total interest and debt financing expenses	6,356	6,257	18,842	17,813
CLO-II | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	4,280	0	12,752	0
Unused fees	0	0	0	0
Amortization of deferred financing costs	111	0	332	0
Total interest and debt financing expenses	4,391	0	13,084	0
CLO-III | Secured Debt
Debt Instrument [Line Items]
Borrowing interest expense	4,061	0	8,804	0
Unused fees	0	0	0	0
Amortization of deferred financing costs	101	0	220	0
Total interest and debt financing expenses	$ 4,162	$ 0	$ 9,024	$ 0