v3.26.3
Fair Value of Financial Instruments - Schedule of Portfolio Investments by Level in the Fair Value Hierarchy (Details) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure $ 1,443,269 $ 1,799,311  
Investments, at fair value: 1,501,652 [1] 1,812,990 [2]  
Controlled Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, at fair value: 384,857 289,670 $ 171,376
Controlled Investments | CION/EagleTree Partners, LLC      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, at fair value: 10,860 13,679  
Controlled Investments | Senior Loan Fund Partners, LLC      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, at fair value: 47,523    
Senior secured first lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 1,053,970 1,370,525  
Senior secured second lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Collateralized securities and structured products - equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 5,028  
Unsecured debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 7,668 6,639  
Equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 351,234 301,109  
Short Term Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 30,397 116,010  
Level 1      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 33,537 122,278  
Level 1 | Senior secured first lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 1 | Senior secured second lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 1 | Collateralized securities and structured products - equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 1 | Unsecured debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 1 | Equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 3,140 6,268  
Level 1 | Short Term Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 30,397 116,010  
Level 2      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 2 | Senior secured first lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 2 | Senior secured second lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 2 | Collateralized securities and structured products - equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 2 | Unsecured debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 2 | Equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 2 | Short Term Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 3      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 1,409,732 1,677,033  
Investments, at fair value: 1,409,732 1,677,033  
Level 3 | Senior secured first lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 1,053,970 1,370,525  
Level 3 | Senior secured second lien debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 0  
Level 3 | Collateralized securities and structured products - equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 0 5,028  
Level 3 | Unsecured debt      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 7,668 6,639  
Level 3 | Equity      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure 348,094 294,841  
Level 3 | Short Term Investments      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Investments, fair value disclosure $ 0 $ 0  
[1] Fair value determined in good faith by CION Investment Management, LLC, or CIM, as the Company’s valuation designee, subject to oversight of the Company's board of directors (see Note 9 and Note 2), using significant unobservable inputs unless otherwise noted.
[2] Fair value determined in good faith by CIM, as the Company's valuation designee, subject to the oversight of the Company's board of directors (see Note 9 and Note 2), using significant unobservable inputs unless otherwise noted.