Fair Value Measurement - Summary of Changes in Fair Value of Level 3 Assets By Investment Type (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		$ (50,417)	$ (98,141)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Gain (Loss) on Investments	Gain (Loss) on Investments
1st Lien/Senior Secured Debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		$ (22,056)	$ (81,340)
1st Lien/Last-Out Unitranche
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		(2,733)	519
2nd Lien/Senior Secured Debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		(1,354)	8,646
Unsecured Debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		86	(21,971)
Preferred Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		698	2,617
Common Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		(24,884)	(6,789)
Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Net Change in Unrealized Appreciation (Depreciation) for assets still held		(174)	177
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		3,431,997	3,343,635
Purchases	[1]	1,046,050	1,220,380
Net Realized Gain (Loss)		$ (123,116)	$ (157,952)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Debt and Equity Securities, Realized Gain (Loss)	Debt and Equity Securities, Realized Gain (Loss)
Net Change in Unrealized Appreciation (Depreciation)		$ 64,876	$ (36,204)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Asset, Gain (Loss), Statement of Other Comprehensive Income or Comprehensive Income [Extensible Enumeration]		Debt and Equity Securities, Unrealized Gain (Loss)	Debt and Equity Securities, Unrealized Gain (Loss)
Sales and Settlements	[2]	$ (1,234,017)	$ (968,832)
Net Amortization of Premium/Discount		21,737	24,460
Transfers In	[3]	0	6,510
Transfers Out	[3]	0	0
Ending Balance		3,207,527	3,431,997
Level 3 | 1st Lien/Senior Secured Debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		3,136,683	3,036,965
Purchases	[1]	943,772	1,162,300
Net Realized Gain (Loss)		(97,604)	(156,973)
Net Change in Unrealized Appreciation (Depreciation)		62,331	(20,331)
Sales and Settlements	[2]	(1,090,492)	(914,752)
Net Amortization of Premium/Discount		19,956	22,964
Transfers In	[3]	0	6,510
Transfers Out	[3]	0	0
Ending Balance		2,974,646	3,136,683
Level 3 | 1st Lien/Last-Out Unitranche
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		165,905	144,743
Purchases	[1]	84,203	20,213
Net Realized Gain (Loss)		(0)	(0)
Net Change in Unrealized Appreciation (Depreciation)		(188)	519
Sales and Settlements	[2]	(116,145)	(411)
Net Amortization of Premium/Discount		1,381	841
Transfers In	[3]	0	0
Transfers Out	[3]	0	0
Ending Balance		135,156	165,905
Level 3 | 2nd Lien/Senior Secured Debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		46,786	66,562
Purchases	[1]	2,650	11,675
Net Realized Gain (Loss)		(9,031)	(0)
Net Change in Unrealized Appreciation (Depreciation)		7,676	7,688
Sales and Settlements	[2]	0	(40,129)
Net Amortization of Premium/Discount		(167)	990
Transfers In	[3]	(0)	0
Transfers Out	[3]	(0)	0
Ending Balance		47,914	46,786
Level 3 | Unsecured Debt
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		16,790	27,314
Purchases	[1]	334	10,086
Net Realized Gain (Loss)		(1,055)	(2,025)
Net Change in Unrealized Appreciation (Depreciation)		1,206	(18,250)
Sales and Settlements	[2]	(9,366)	0
Net Amortization of Premium/Discount		567	(335)
Transfers In	[3]	0	(0)
Transfers Out	[3]	0	(0)
Ending Balance		8,476	16,790
Level 3 | Preferred Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		31,246	37,296
Purchases	[1]	8,698	212
Net Realized Gain (Loss)		4,717	437
Net Change in Unrealized Appreciation (Depreciation)		(2,408)	2,635
Sales and Settlements	[2]	(15,827)	(9,334)
Net Amortization of Premium/Discount		0	(0)
Transfers In	[3]	0	(0)
Transfers Out	[3]	0	(0)
Ending Balance		26,426	31,246
Level 3 | Common Stock
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		34,166	30,511
Purchases	[1]	6,393	15,894
Net Realized Gain (Loss)		(20,143)	609
Net Change in Unrealized Appreciation (Depreciation)		(3,567)	(8,642)
Sales and Settlements	[2]	(2,187)	(4,206)
Net Amortization of Premium/Discount		0	(0)
Transfers In	[3]	0	(0)
Transfers Out	[3]	0	(0)
Ending Balance		14,662	34,166
Level 3 | Warrants
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Beginning Balance		421	244
Purchases	[1]	0	0
Net Realized Gain (Loss)		(0)	0
Net Change in Unrealized Appreciation (Depreciation)		(174)	177
Sales and Settlements	[2]	0	0
Net Amortization of Premium/Discount		0	(0)
Transfers In	[3]	0	(0)
Transfers Out	[3]	0
Ending Balance		$ 247	$ 421

[1] Purchases may include PIK, securities received in corporate actions and restructurings.

[2] Sales and Settlements may include securities delivered in corporate actions and restructuring of investments.

[3] Transfers in (out) of Level 3 are due to a decrease (increase) in the quantity and reliability of broker quotes obtained by the Investment Adviser.