Fair Value Measurement - Summary of Assets and Liabilities Categorized Within Fair Value Hierarchy (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Assets
Debt investments, Fair Value	$ 3,261,721	$ 3,475,258
Debt investments, Fair Value	3,298,052	3,500,496
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts
Assets
Unrealized appreciation (depreciation)	(252)	(38)
Liabilities
Unrealized Appreciation (Depreciation)	(252)	(38)
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts Level 1
Assets
Unrealized appreciation (depreciation)	0	0
Liabilities
Unrealized Appreciation (Depreciation)	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts Level 2
Assets
Unrealized appreciation (depreciation)	(252)	(38)
Liabilities
Unrealized Appreciation (Depreciation)	(252)	(38)
Open Forward Foreign Currency Contract, Identifier [Axis]: Foreign Currency Forward Contracts Level 3
Assets
Unrealized appreciation (depreciation)	0	0
Liabilities
Unrealized Appreciation (Depreciation)	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps
Assets
Unrealized appreciation (depreciation)	(3,570)	(0)
Liabilities
Unrealized Appreciation (Depreciation)	(3,570)	(0)
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps Level 1
Assets
Unrealized appreciation (depreciation)	0	0
Liabilities
Unrealized Appreciation (Depreciation)	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps Level 2
Assets
Unrealized appreciation (depreciation)	(3,570)	(0)
Liabilities
Unrealized Appreciation (Depreciation)	(3,570)	(0)
Open Forward Foreign Currency Contract, Identifier [Axis]: Interest Rate Swaps Level 3
Assets
Unrealized appreciation (depreciation)	0	0
Liabilities
Unrealized Appreciation (Depreciation)	0	0
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities
Assets
Unrealized appreciation (depreciation)	(3,822)	(38)
Liabilities
Unrealized Appreciation (Depreciation)	(3,822)	(38)
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities Level 1
Assets
Unrealized appreciation (depreciation)	(0)	(0)
Liabilities
Unrealized Appreciation (Depreciation)	(0)	(0)
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities Level 2
Assets
Unrealized appreciation (depreciation)	(3,822)	(38)
Liabilities
Unrealized Appreciation (Depreciation)	(3,822)	(38)
Open Forward Foreign Currency Contract, Identifier [Axis]: Total Liabilities Level 3
Assets
Unrealized appreciation (depreciation)	(0)	(0)
Liabilities
Unrealized Appreciation (Depreciation)	(0)	(0)
1st Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	3,028,788	3,179,820
1st Lien/Last-Out Unitranche
Assets
Debt investments, Fair Value	135,156	165,905
2nd Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	47,914	46,786
Unsecured Debt
Assets
Debt investments, Fair Value	8,476	16,790
Preferred Stock
Assets
Equity, Fair Value	26,426	31,246
Common Stock
Assets
Equity, Fair Value	14,714	34,290
Warrants
Assets
Warrants, Fair Value	247	421
Affiliated Money Market Fund
Assets
Debt investments, Fair Value	35,724	25,238
Interest Rate Swaps
Assets
Unrealized appreciation (depreciation)	607	0
Liabilities
Unrealized Appreciation (Depreciation)	607	0
Level 1
Assets
Debt investments, Fair Value	35,776	25,362
Level 1 | 1st Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	0	0
Level 1 | 1st Lien/Last-Out Unitranche
Assets
Debt investments, Fair Value	0	0
Level 1 | 2nd Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	0	0
Level 1 | Unsecured Debt
Assets
Debt investments, Fair Value	0	0
Level 1 | Preferred Stock
Assets
Equity, Fair Value	0	0
Level 1 | Common Stock
Assets
Equity, Fair Value	52	124
Level 1 | Warrants
Assets
Warrants, Fair Value	0	0
Level 1 | Affiliated Money Market Fund
Assets
Debt investments, Fair Value	35,724	25,238
Level 1 | Interest Rate Swaps
Assets
Unrealized appreciation (depreciation)	0	0
Liabilities
Unrealized Appreciation (Depreciation)	0	0
Level 2
Assets
Debt investments, Fair Value	54,749	43,137
Level 2 | 1st Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	54,142	43,137
Level 2 | 1st Lien/Last-Out Unitranche
Assets
Debt investments, Fair Value	0	0
Level 2 | 2nd Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	0	0
Level 2 | Unsecured Debt
Assets
Debt investments, Fair Value	0	0
Level 2 | Preferred Stock
Assets
Equity, Fair Value	0	0
Level 2 | Common Stock
Assets
Equity, Fair Value	0	0
Level 2 | Warrants
Assets
Warrants, Fair Value	0	0
Level 2 | Affiliated Money Market Fund
Assets
Debt investments, Fair Value	0	0
Level 2 | Interest Rate Swaps
Assets
Unrealized appreciation (depreciation)	607	0
Liabilities
Unrealized Appreciation (Depreciation)	607	0
Level 3
Assets
Debt investments, Fair Value	3,207,527	3,431,997
Debt investments, Fair Value	3,207,527	3,431,997
Level 3 | 1st Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	2,974,646	3,136,683
Level 3 | 1st Lien/Last-Out Unitranche
Assets
Debt investments, Fair Value	135,156	165,905
Level 3 | 2nd Lien/Senior Secured Debt
Assets
Debt investments, Fair Value	47,914	46,786
Level 3 | Unsecured Debt
Assets
Debt investments, Fair Value	8,476	16,790
Level 3 | Preferred Stock
Assets
Equity, Fair Value	26,426	31,246
Level 3 | Common Stock
Assets
Equity, Fair Value	14,662	34,166
Level 3 | Warrants
Assets
Warrants, Fair Value	247	421
Level 3 | Affiliated Money Market Fund
Assets
Debt investments, Fair Value	0	0
Level 3 | Interest Rate Swaps
Assets
Unrealized appreciation (depreciation)	0	0
Liabilities
Unrealized Appreciation (Depreciation)	$ 0	$ 0