Borrowings - SPV Credit Facility (Details) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2024		Mar. 28, 2024	Dec. 31, 2023
Borrowings
Fair Value	[1]	$ 3,387,141	[2]		$ 2,528,167	[3]
Interest expense - SPV Credit Facility
Borrowings
Maximum borrowing capacity		$ 450,000
Maximum borrowing capacity, percentage of the principal balance of company's portfolio company investments		72.00%
Maximum percentage of advance rate on the portfolio		67.00%
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]		Adjusted Term SOFR
Interest rate, floor		0.50%
Weighted average interest rate		8.20%			8.20%
Interest expense - SPV Credit Facility | When the outstanding borrowings are less than or equal to 60% of the facility
Borrowings
Commitment fee (in percent)		0.50%
Outstanding borrowings as a percentage of facility amount considered for payment of commitment fee		60.00%
Interest expense - SPV Credit Facility | When the outstanding borrowings are greater than 60% of the facility
Borrowings
Commitment fee (in percent)		0.35%
Outstanding borrowings as a percentage of facility amount considered for payment of commitment fee		60.00%
Interest expense - SPV Credit Facility | During the reinvestment period | Minimum
Borrowings
Interest rate, basis spread		2.75%
Interest expense - SPV Credit Facility | During the reinvestment period | Maximum
Borrowings
Interest rate, basis spread		3.00%
Interest expense - SPV Credit Facility | After the reinvestment period
Borrowings
Interest rate, basis spread		3.25%
Interest expense - SPV Credit Facility | Asset pledged as collateral
Borrowings
Fair Value		$ 896,854			$ 759,141
SPV III Credit Facility
Borrowings
Maximum borrowing capacity				$ 100,000
Weighted average interest rate		8.30%
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.)