Fair Value - Level III Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Total
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 858,720	$ 196,233	$ 475,705	$ 104,427
Net realized/unrealized gains (losses) on investments	74	4,501		7,337
Purchases, including capitalized PIK and revolver fundings	320,404	99,335	753,056	192,083
Proceeds from sales and paydowns of investments	(40,465)	(567)	(120,826)	(2,135)
Transfers into Level III		9,475	18,729
Transfers out of Level III	(26,096)	(9,112)	(17,177)	(1,847)
Ending balance	1,112,637	299,865	1,112,637	299,865
Net change in unrealized appreciation (depreciation) for the period relating to those Level III assets that were still held by the Company at the end of the period	74	4,501	2,995	7,337
Total | Net realized (losses) gains on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			14
Total | Net change in unrealized appreciation (depreciation) of investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			3,136
First lien
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	826,750	173,615	459,051	93,348
Net realized/unrealized gains (losses) on investments	(42)	4,031		6,697
Purchases, including capitalized PIK and revolver fundings	304,067	98,855	721,534	187,423
Proceeds from sales and paydowns of investments	(40,412)	(567)	(120,773)	(2,135)
Transfers into Level III		9,475	18,729
Transfers out of Level III	(26,096)	(1,923)	(17,177)	(1,847)
Ending balance	1,064,267	283,486	1,064,267	283,486
Net change in unrealized appreciation (depreciation) for the period relating to those Level III assets that were still held by the Company at the end of the period	(42)	4,031	2,748	6,697
First lien | Net realized (losses) gains on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			14
First lien | Net change in unrealized appreciation (depreciation) of investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			2,889
Second lien
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	18,016	15,350	8,678	7,239
Net realized/unrealized gains (losses) on investments	60	419		541
Purchases, including capitalized PIK and revolver fundings	1,270	0	10,478	800
Proceeds from sales and paydowns of investments	0	0	0	0
Transfers into Level III		0	0
Transfers out of Level III	0	(7,189)	0	0
Ending balance	19,346	8,580	19,346	8,580
Net change in unrealized appreciation (depreciation) for the period relating to those Level III assets that were still held by the Company at the end of the period	60	419	190	541
Second lien | Net realized (losses) gains on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			0
Second lien | Net change in unrealized appreciation (depreciation) of investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			190
Subordinated
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	12,587	6,382	6,610	3,077
Net realized/unrealized gains (losses) on investments	49	51		73
Purchases, including capitalized PIK and revolver fundings	354	0	6,279	3,283
Proceeds from sales and paydowns of investments	(53)	0	(53)	0
Transfers into Level III		0	0
Transfers out of Level III	0	0	0	0
Ending balance	12,937	6,433	12,937	6,433
Net change in unrealized appreciation (depreciation) for the period relating to those Level III assets that were still held by the Company at the end of the period	49	51	101	73
Subordinated | Net realized (losses) gains on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			0
Subordinated | Net change in unrealized appreciation (depreciation) of investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			101
Equity and other
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	1,367	886	1,366	763
Net realized/unrealized gains (losses) on investments	7	0		26
Purchases, including capitalized PIK and revolver fundings	14,713	480	14,765	577
Proceeds from sales and paydowns of investments	0	0	0	0
Transfers into Level III		0	0
Transfers out of Level III	0	0	0	0
Ending balance	16,087	1,366	16,087	1,366
Net change in unrealized appreciation (depreciation) for the period relating to those Level III assets that were still held by the Company at the end of the period	$ 7	$ 0	(44)	$ 26
Equity and other | Net realized (losses) gains on investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			0
Equity and other | Net change in unrealized appreciation (depreciation) of investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Net realized/unrealized gains (losses) on investments			$ (44)