v3.26.1
Fair Value Measurements - Summary of Fair Value Hierarchy of Financial Instruments (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure [1] $ 3,960,588 $ 3,624,074
Fair Value, Inputs, Level 3 [Member] | Secured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure [1] 3,850,702 3,512,613
Fair Value, Recurring [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 4,493,774 4,246,035
Fair Value, Net Asset (Liability), Total 4,488,169 4,243,084
Total Investments after Cash Equivalents 4,443,900 4,174,391
Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability), Total (5,605) (2,951)
Fair Value, Recurring [Member] | Unsecured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 18,738 18,809
Fair Value, Recurring [Member] | Secured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 4,334,014 4,062,930
Fair Value, Recurring [Member] | Short-Term Investments    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Total Investments after Cash Equivalents 49,874 71,644
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 49,874 71,644
Fair Value, Net Asset (Liability), Total 49,874 71,644
Total Investments after Cash Equivalents 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Interest Rate Swap [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability), Total 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Unsecured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Secured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Short-Term Investments    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Total Investments after Cash Equivalents 49,874 71,644
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 483,312 550,317
Fair Value, Net Asset (Liability), Total 477,707 547,366
Total Investments after Cash Equivalents 483,312 550,317
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability), Total (5,605) (2,951)
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Unsecured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Secured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 483,312 550,317
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Short-Term Investments    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Total Investments after Cash Equivalents 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 3,960,588 3,624,074
Fair Value, Net Asset (Liability), Total 3,960,588 3,624,074
Total Investments after Cash Equivalents 3,960,588 3,624,074
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Interest Rate Swap [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Fair Value, Net Asset (Liability), Total 0 0
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Unsecured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 18,738 18,809
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Secured Debt    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 3,850,702 3,512,613
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Short-Term Investments    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Total Investments after Cash Equivalents 0 0
Equity Method Investments | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure [1] 91,148 92,652
Equity Method Investments | Fair Value, Recurring [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 91,148 92,652
Equity Method Investments | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 0 0
Equity Method Investments | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure 0 0
Equity Method Investments | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member]    
Fair Value, Concentration of Risk, Financial Statement Captions [Line Items]    
Investments, Fair Value Disclosure $ 91,148 $ 92,652
[1] As of March 31, 2026 and December 31, 2025, amounts of $339,644 and $1,110,503, respectively, included within the fair value of Level 3 assets were valued based on unobservable inputs not developed by the Adviser (e.g., broker quotes and transaction prices).