v3.25.1
Fair Value Measurements - Summary of Changes in Fair Value of Financial Instruments Level 3 Inputs (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period $ 1,191,944  
Purchases of investments including capitalized PIK interest and dividends 185,954 $ 193,109
Proceeds from principal repayments and sales of investments (15,853) (26,504)
Accretion of discounts 858 89
Net realized gain 163  
Net unrealized gain $ 4,958 $ 584
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Fair value, end of period $ 1,368,024 $ 167,278
Net unrealized gain included in earnings related to financial instruments still held as of March 31, 2025/2024 included in net unrealized gain on the Consolidated Statements of Operations $ 5,246 $ 584
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
First Lien Debt    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period $ 1,107,757  
Purchases of investments including capitalized PIK interest and dividends 185,954 $ 193,109
Proceeds from principal repayments and sales of investments (15,853) (26,504)
Accretion of discounts 858 89
Fair value, end of period 1,283,427 167,278
Net unrealized gain included in earnings related to financial instruments still held as of March 31, 2025/2024 included in net unrealized gain on the Consolidated Statements of Operations 4,836 584
Common equity    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period 7,500  
Fair value, end of period 7,742  
Net unrealized gain included in earnings related to financial instruments still held as of March 31, 2025/2024 included in net unrealized gain on the Consolidated Statements of Operations 242  
Preferred Equity    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period 76,687  
Fair value, end of period 76,855  
Net unrealized gain included in earnings related to financial instruments still held as of March 31, 2025/2024 included in net unrealized gain on the Consolidated Statements of Operations 168  
First Lien Debt Unrealized Gain Loss    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net realized gain 163  
Net unrealized gain 4,548 $ 584
Common Equity Unrealized Gain Loss    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net unrealized gain 242  
Preferred Equity Unrealized Gain Loss    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net unrealized gain $ 168