Consolidated Statements of Assets and Liabilities (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2024		Dec. 31, 2023
Cost	$ 5,053,683	[1],[2]	$ 3,785,797	[3],[4]
Fair Value	5,083,969		3,807,639
Restricted cash and cash equivalents	0		0
Unamortized debt issuance costs	$ 46,521		$ 26,047
Common stock, par value (in USD per share)	$ 0.01		$ 0.01
Common stock, shares authorized (in shares)	500,000,000		500,000,000
Common stock, shares, issued (in shares)	174,960,148		118,624,729
Common stock, shares, outstanding (in shares)	174,960,148		118,624,729
Non-controlled, non-affiliated investments
Cost	$ 4,908,957	[1],[2]	$ 3,673,336	[3],[4]
Fair Value	4,935,383		3,695,692
Non-controlled, affiliated investments
Cost	142,537	[1],[2]	112,461	[3],[4]
Fair Value	146,399		111,947
Controlled, affiliated investments
Cost	2,189	[1],[2]	0
Fair Value	$ 2,187		$ 0

[1] As of September 30, 2024, the net estimated unrealized gain for U.S. federal income tax purposes was $85.2 million based on a tax cost basis of $5.0 billion. As of September 30, 2024, there was no estimated aggregate gross unrealized loss for U.S. federal income tax purposes and the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $85.2 million.

[2] The amortized cost represents the original cost adjusted for the amortization and accretion of premiums and discounts, as applicable, on debt investments using the effective interest method.

[3] As of December 31, 2023, the net estimated unrealized gain for U.S. federal income tax purposes was $63.7 million based on a tax cost basis of $3.7 billion. As of December 31, 2023, there was no estimated aggregate gross unrealized loss for U.S. federal income tax purposes and the estimated aggregate gross unrealized gain for U.S. federal income tax purposes was $63.7 million.

[4] The amortized cost represents the original cost adjusted for the amortization and accretion of premiums and discounts, as applicable, on debt investments using the effective interest method.