Fair Value of Financial Instruments - Schedule of Net Change in Unrealized Gains on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	$ (62,330)	$ 73,395	$ (481,542)	$ 67,214
First-lien senior secured debt investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(12,992)	30,350	(200,454)	25,128
First-lien senior secured debt investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(1,785)	3,495	(15,445)	3,528
First-lien senior secured debt investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(15,164)	27,299	(195,219)	22,321
Second-lien senior secured debt investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(23,955)	2,078	(60,628)	(446)
Second-lien senior secured debt investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	0	0	0	(12,198)
Second-lien senior secured debt investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(23,955)	1,012	(60,628)	8,501
Unsecured debt investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	171	8,932	(5,227)	11,330
Unsecured debt investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	203	710	2,335	85
Unsecured debt investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	171	8,932	(5,227)	11,872
Specialty finance debt investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	1	0	1	(16)
Specialty finance debt investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	0	0	0	0
Specialty finance debt investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	1	0	1	(16)
Preferred equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(46,998)	19,138	(160,536)	12,986
Preferred equity investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(17,877)	76	(10,549)	115
Preferred equity investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(31,065)	19,138	(149,277)	12,986
Common equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	21,562	8,021	(53,798)	15,029
Common equity investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	4,309	0	112,077	0
Common equity investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(96,056)	8,007	(210,172)	14,916
Specialty finance equity investments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(119)	4,876	(900)	3,203
Specialty finance equity investments \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	0	0	0	0
Specialty finance equity investments \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(119)	4,876	(900)	3,203
Total \| Income Statement Location [Axis]: us-gaap:RealizedInvestmentGainsLosses
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(15,150)	4,281	88,418	(8,470)
Total \| Income Statement Location [Axis]: us-gaap:UnrealizedGainLossOnInvestments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	$ (166,187)	$ 69,264	$ (621,422)	$ 73,783