v3.26.1
Debt - Schedule of Outstanding Debt Obligations (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Jun. 27, 2025
Jun. 12, 2025
Oct. 21, 2024
Jan. 09, 2024
Apr. 27, 2022
Debt Instrument [Line Items]              
Aggregate Principal Committed $ 4,145,000,000 $ 4,145,000,000          
Outstanding Principal 2,402,054,000 2,836,315,000          
Amount Available 976,488,000 954,997,000          
Unamortized Debt Issuance Costs (30,777,000) (32,959,000)          
Net Carrying Value 2,371,277,000 2,803,356,000          
Line of credit              
Debt Instrument [Line Items]              
Unamortized Debt Issuance Costs (30,777,000) (32,959,000)          
Line of credit | Revolving Credit Facility              
Debt Instrument [Line Items]              
Aggregate Principal Committed         $ 1,050,000,000.00    
Unamortized Debt Issuance Costs (7,239,000) (7,735,000)          
Line of credit | SPV Asset Facility I              
Debt Instrument [Line Items]              
Aggregate Principal Committed 750,000,000 750,000,000         $ 750,000,000.0
Outstanding Principal 474,000,000 497,000,000          
Amount Available 56,313,000 66,742,000          
Unamortized Debt Issuance Costs (5,216,000) (5,626,000)          
Net Carrying Value 468,784,000 491,374,000          
Line of credit | SPV Asset Facility II              
Debt Instrument [Line Items]              
Aggregate Principal Committed 500,000,000 500,000,000          
Outstanding Principal 270,250,000 320,250,000          
Amount Available 30,194,000 78,842,000          
Unamortized Debt Issuance Costs (3,358,000) (3,589,000)          
Net Carrying Value 266,892,000 316,661,000          
Line of credit | SPV Asset Facility III              
Debt Instrument [Line Items]              
Aggregate Principal Committed 550,000,000 550,000,000       $ 550,000,000.0  
Outstanding Principal 350,000,000 550,000,000          
Amount Available 34,129,000 0          
Unamortized Debt Issuance Costs (6,752,000) (6,929,000)          
Net Carrying Value 343,248,000 543,071,000          
Line of credit | SPV Asset Facility IV              
Debt Instrument [Line Items]              
Aggregate Principal Committed 750,000,000 750,000,000   $ 750,000,000.0      
Outstanding Principal 461,500,000 629,500,000          
Amount Available 121,226,000 53,978,000          
Unamortized Debt Issuance Costs (5,261,000) (5,840,000)          
Net Carrying Value 456,239,000 623,660,000          
Line of credit | Athena CLO III              
Debt Instrument [Line Items]              
Aggregate Principal Committed 270,000,000 270,000,000          
Outstanding Principal 270,000,000 270,000,000          
Amount Available 0 0          
Unamortized Debt Issuance Costs (2,113,000) (2,188,000)          
Net Carrying Value 267,887,000 267,812,000          
Line of credit | Series 2023A Notes              
Debt Instrument [Line Items]              
Aggregate Principal Committed 100,000,000 100,000,000          
Outstanding Principal 100,000,000 100,000,000          
Amount Available 0 0          
Unamortized Debt Issuance Costs (107,000) (207,000)          
Net Carrying Value 99,893,000 99,793,000          
Line of credit | Series 2023B-A Notes              
Debt Instrument [Line Items]              
Aggregate Principal Committed 100,000,000 100,000,000          
Outstanding Principal 100,000,000 100,000,000          
Amount Available 0 0          
Unamortized Debt Issuance Costs (507,000) (552,000)          
Net Carrying Value 99,493,000 99,448,000          
Line of credit | Series 2023B-B Notes              
Debt Instrument [Line Items]              
Aggregate Principal Committed 75,000,000 75,000,000          
Outstanding Principal 75,000,000 75,000,000          
Amount Available 0 0          
Unamortized Debt Issuance Costs (224,000) (293,000)          
Net Carrying Value 74,776,000 74,707,000          
Line of credit | Revolving Credit Facility | Revolving Credit Facility              
Debt Instrument [Line Items]              
Aggregate Principal Committed 1,050,000,000 1,050,000,000 $ 925,000,000.0   $ 875,000,000.0    
Outstanding Principal 301,304,000 294,565,000          
Amount Available 734,626,000 755,435,000          
Unamortized Debt Issuance Costs (7,239,000) (7,735,000)          
Net Carrying Value $ 294,065,000 $ 286,830,000