Borrowings - SPV III Credit Facility (Details) - USD ($) $ in Thousands			6 Months Ended
		Mar. 28, 2024	Jun. 30, 2024		Dec. 31, 2023
Borrowings
Fair Value	[1]		$ 3,387,141	[2]	$ 2,528,167	[3]
SPV III Credit Facility
Borrowings
Maximum borrowing capacity		$ 100,000
Debt instrument, accordion feature facility		$ 250,000
Line of credit facility, maximum borrowing capacity, percentage		70.00%
Weighted average interest rate			8.30%
SPV III Credit Facility | Credit Facility Through September 5, 2024
Borrowings
Commitment fee (in percent)			0.75%
SPV III Credit Facility | Credit Facility After September 5, 2024
Borrowings
Commitment fee (in percent)			0.50%
SPV III Credit Facility | Margin Rate
Borrowings
Interest rate, basis spread			2.95%
SPV III Credit Facility | Minimum | Adjusted Term SOFR
Borrowings
Interest rate, basis spread			1.00%
SPV III Credit Facility | Asset pledged as collateral
Borrowings
Fair Value			$ 86,587		$ 0

[1] All of the Company’s investments are issued by eligible portfolio companies, as defined in the Investment Company Act of 1940, as amended, (the “1940 Act”), unless otherwise noted. All of the Company’s investments are issued by U.S. portfolio companies unless otherwise noted.

[2] Except as otherwise noted, because there is no readily available market value for these investments, the fair value of each of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements).

[3] Except as otherwise noted, because there is no readily available market value for these investments, the fair value of each of these investments is determined in good faith using significant unobservable inputs by the Valuation Designee. (See Note 4 in the accompanying notes to the consolidated financial statements.)