Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details)

v3.23.3
Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value $ 3,368,642 $ 2,346,629
Unamortized issuance costs (9,276) (3,572)
Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 3,356,815 2,342,067
Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 3,368,642 2,346,629
HLEND A Funding Facility | Line of Credit | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 600,542 453,663
HLEND A Funding Facility | Line of Credit | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 600,542 453,663
HLEND B Funding Facility | Line of Credit | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 490,509 482,084
HLEND B Funding Facility | Line of Credit | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 490,509 482,084
HLEND C Funding Facility | Line of Credit | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 487,500 0
HLEND C Funding Facility | Line of Credit | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 487,500 0
HLEND D Funding Facility | Line of Credit | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 0 0
HLEND D Funding Facility | Line of Credit | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 0 0
Senior Secured Revolving Credit Facility | Line of Credit | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 751,169 704,819
Senior Secured Revolving Credit Facility | Line of Credit | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 751,169 704,819
November 2025 Notes | Senior Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs (1,400) (1,900)
Net cumulative increase (decrease) from hedging activities (1,600) 300
November 2025 Notes | Senior Notes | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 167,054 168,462
November 2025 Notes | Senior Notes | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 168,584 170,628
November 2027 Notes | Senior Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs (1,500) (1,700)
Net cumulative increase (decrease) from hedging activities (1,900) 700
November 2027 Notes | Senior Notes | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 151,634 153,958
November 2027 Notes | Senior Notes | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 152,765 156,354
March 2026 Notes | Senior Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs (2,100)  
Net cumulative increase (decrease) from hedging activities (3,500)  
March 2026 Notes | Senior Notes | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 270,419 0
March 2026 Notes | Senior Notes | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 273,400 0
March 2028 Notes | Senior Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs (1,000)  
Net cumulative increase (decrease) from hedging activities (3,100)  
March 2028 Notes | Senior Notes | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 119,941 0
March 2028 Notes | Senior Notes | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 121,605 0
September 2027 Notes | Senior Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs (700)  
Net cumulative increase (decrease) from hedging activities (700)  
September 2027 Notes | Senior Notes | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 73,555 0
September 2027 Notes | Senior Notes | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 74,552 0
September 2028 Notes | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 244,492 0
September 2028 Notes | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 248,016 0
September 2028 Notes | Senior Notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs (2,600)  
Net cumulative increase (decrease) from hedging activities (2,900)  
Short Term Financing Transactions | Securities Sold under Agreements to Repurchase | Reported Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value 0 379,081
Short Term Financing Transactions | Securities Sold under Agreements to Repurchase | Estimate of Fair Value Measurement    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Debt fair value $ 0 $ 379,081