v3.26.1
Fair Value Measurements - Financial Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value $ 12,886,386 $ 13,102,473
Unamortized issuance costs 95,093 90,359
Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 12,865,354 12,950,206
Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 12,886,386 13,102,473
Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 95,093 90,359
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 13,474 50,869
Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 12,865,354  
HLEND A Funding Facility | Line of credit | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 723,382 758,407
HLEND A Funding Facility | Line of credit | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 723,382 758,407
HLEND B Funding Facility | Line of credit | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 900,773 833,783
HLEND B Funding Facility | Line of credit | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 900,773 833,783
HLEND C Funding Facility | Line of credit | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 510,000 510,000
HLEND C Funding Facility | Line of credit | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 510,000 510,000
HLEND D Funding Facility | Line of credit | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 575,428 757,110
HLEND D Funding Facility | Line of credit | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 575,428 757,110
HLEND E Funding Facility | Line of credit | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 903,100 906,290
HLEND E Funding Facility | Line of credit | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 903,100 906,290
Revolving Credit Facility | Line of credit | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 592,290 1,742,106
Revolving Credit Facility | Line of credit | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 592,290 1,742,106
November 2027 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 573 660
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 367 866
November 2027 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 154,794 155,206
November 2027 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 161,357 164,994
March 2028 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 442 498
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 433 1,273
March 2028 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 123,991 124,775
March 2028 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 129,217 132,520
September 2027 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 287 336
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 593 1,183
September 2027 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 75,306 75,847
September 2027 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 78,059 79,693
September 2028 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 1,292 1,422
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 3,113 5,287
September 2028 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 251,821 253,865
September 2028 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 265,709 273,213
January 2029 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 7,203 7,829
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 3,051 6,146
January 2029 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 545,848 548,317
January 2029 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 558,338 574,607
September 2029 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 6,432 6,885
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 6,844 10,405
September 2029 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 400,412 403,520
September 2029 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 399,860 414,580
January 2028 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 7,063 8,035
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 6,525 11,114
January 2028 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 749,462 753,079
January 2028 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 745,320 759,180
April 2032 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 11,562 12,033
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 12,622 16,242
April 2032 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 501,060 504,209
April 2032 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 483,655 508,160
June 2027 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 2,575 3,005
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship (72) 1,851
June 2027 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 397,353 398,846
June 2027 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 398,336 402,424
June 2030 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 6,723 6,991
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 335 4,124
June 2030 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 493,612 497,133
June 2030 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 488,080 506,670
September 2028-1 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 6,634 7,145
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship (5,163) (2,640)
September 2028-1 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 588,203 590,215
September 2028-1 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 584,904 596,982
November 2030 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 5,120 5,265
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship (8,790) (4,982)
November 2030 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 486,090 489,753
November 2030 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 478,810 498,825
April 2029 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 3,331 0
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship (2,904) 0
April 2029 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 343,765 0
April 2029 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 340,281 0
April 2031 Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 4,860 0
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship (3,480) 0
April 2031 Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 391,660 0
April 2031 Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 384,252 0
2023 CLO Refinancing Secured Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 2,640 2,783
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 0 0
2023 CLO Refinancing Secured Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 575,360 575,217
2023 CLO Refinancing Secured Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 578,903 578,576
2024 CLO Secured Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 16,991 18,322
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 0 0
2024 CLO Secured Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 383,009 381,678
2024 CLO Secured Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 399,470 400,789
2025 CLO Secured Debt | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 3,979 4,229
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 0 0
2025 CLO Secured Debt | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 846,021 845,771
2025 CLO Secured Debt | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 846,989 851,044
2025-4 CLO Secured Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 4,655 4,921
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 0 0
2025-4 CLO Secured Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 845,345 845,079
2025-4 CLO Secured Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 849,698 852,520
2026 CLO Secured Notes | Senior notes    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Unamortized issuance costs 2,731 0
Cumulative Change in the Notes Carrying Value as a Result of the Qualifying Fair Value Hedge Relationship 0 0
2026 CLO Secured Notes | Senior notes | Carrying Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value 507,269 0
2026 CLO Secured Notes | Senior notes | Fair Value    
Fair Value Disclosure, Asset and Liability, Not Measured at Fair Value [Line Items]    
Carrying Value $ 510,175 $ 0