v3.26.1
Debt - Schedule of Components (Details) - USD ($)
Jun. 30, 2026
Jun. 04, 2026
Dec. 31, 2025
Jun. 30, 2025
Oct. 15, 2024
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed $ 3,309,000,000   $ 3,084,000,000    
Principal Amount Outstanding 2,284,000,000   2,024,500,000    
Principal Amount Available 970,371,000   777,796,000    
Carrying Value 2,280,212,000   2,031,988,000    
Fair Value 2,277,289,000   2,028,733,000    
Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 4,685,649,000   4,174,054,000    
Senior Notes          
Line of Credit Facility [Line Items]          
Principal Amount Outstanding 940,000,000   715,000,000    
ASPV Credit Facility | Line of Credit          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Credit Facilities 500,000,000   500,000,000    
Principal Amount Outstanding 254,000,000   272,600,000    
Principal Amount Available 229,348,000   59,321,000    
Carrying Value, Credit Facilities 254,000,000   272,600,000    
Fair Value, Credit Facility 254,000,000   272,600,000    
ASPV Credit Facility | Line of Credit | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 731,610,000   494,373,000    
MSPV Credit Facility | Line of Credit          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Credit Facilities 500,000,000   500,000,000    
Principal Amount Outstanding 390,000,000   386,400,000    
Principal Amount Available 110,000,000   57,296,000    
Carrying Value, Credit Facilities 390,000,000   386,400,000    
Fair Value, Credit Facility 390,000,000   386,400,000    
MSPV Credit Facility | Line of Credit | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 881,286,000   684,938,000    
SMBC Truist Credit Facility | Line of Credit          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Credit Facilities 975,000,000   975,000,000    
Principal Amount Outstanding 306,000,000   256,500,000    
Principal Amount Available 631,023,000   661,179,000    
Carrying Value, Credit Facilities 306,000,000   256,500,000    
Fair Value, Credit Facility 306,000,000   256,500,000    
SMBC Truist Credit Facility | Line of Credit | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 2,625,399,000   2,550,658,000    
Series A Tranche A Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 90,000,000   90,000,000    
Principal Amount Outstanding 90,000,000   90,000,000    
Carrying Value, Other Borrowings 90,000,000   90,406,000    
Fair Value, Other Borrowings 90,266,000   90,965,000    
Series A Tranche A Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series A Tranche B Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 150,000,000   150,000,000    
Principal Amount Outstanding 150,000,000   150,000,000    
Carrying Value, Other Borrowings 149,411,000   151,856,000    
Fair Value, Other Borrowings 150,590,000   153,212,000    
Series A Tranche B Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series B Tranche A Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 85,000,000   85,000,000   $ 85,000,000
Principal Amount Outstanding 85,000,000   85,000,000    
Carrying Value, Other Borrowings 84,661,000   86,045,000    
Fair Value, Other Borrowings 83,824,000   84,981,000    
Series B Tranche A Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series B Tranche B Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 25,000,000   25,000,000   25,000,000
Principal Amount Outstanding 25,000,000   25,000,000    
Carrying Value, Other Borrowings 25,000,000   25,000,000    
Fair Value, Other Borrowings 24,999,000   24,999,000    
Series B Tranche B Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series B Tranche C Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 290,000,000   290,000,000   $ 290,000,000
Principal Amount Outstanding 290,000,000   290,000,000    
Carrying Value, Other Borrowings 288,496,000   293,911,000    
Fair Value, Other Borrowings 284,354,000   289,100,000    
Series B Tranche C Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series C Tranche A Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 25,000,000   25,000,000 $ 25,000,000  
Principal Amount Outstanding 25,000,000   25,000,000    
Carrying Value, Other Borrowings 23,834,000   25,178,000    
Fair Value, Other Borrowings 24,854,000   25,190,000    
Series C Tranche A Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series C Tranche B Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 75,000,000   75,000,000 $ 75,000,000  
Principal Amount Outstanding 75,000,000   75,000,000    
Carrying Value, Other Borrowings 74,757,000   75,092,000    
Fair Value, Other Borrowings 74,402,000   75,786,000    
Series C Tranche B Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0   0    
Series D Tranche A Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 50,000,000 $ 50,000,000      
Principal Amount Outstanding 50,000,000        
Carrying Value, Other Borrowings 49,944,000        
Fair Value, Other Borrowings 50,000,000        
Series D Tranche A Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0        
Series D Tranche B Notes | Senior Notes          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 175,000,000 $ 175,000,000      
Principal Amount Outstanding 175,000,000        
Carrying Value, Other Borrowings 175,109,000        
Fair Value, Other Borrowings 175,000,000        
Series D Tranche B Notes | Senior Notes | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral 0        
CLO Transaction | Secured Debt          
Line of Credit Facility [Line Items]          
Maximum Principal Amount Committed, Other Borrowings 369,000,000   369,000,000    
Principal Amount Outstanding 369,000,000   369,000,000    
Principal Amount Available 0   0    
Carrying Value, Other Borrowings 369,000,000   369,000,000    
Fair Value, Other Borrowings 369,000,000   369,000,000    
CLO Transaction | Secured Debt | Asset Pledged as Collateral          
Line of Credit Facility [Line Items]          
Assets Pledged as Collateral $ 447,354,000   $ 444,085,000