v3.26.1
Fair Value Measurements - Narrative (Details) - USD ($)
 3 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
SBIC investments $ 122,602,000 $ 121,072,000  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 0    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3 0    
Borrowings - Credit-Link Notes 112,500,000    
Other Borrowings, Fair Value Disclosure 111,250,000 113,634,000  
Interest Expense, Operating 155,825,000 165,586,000 $ 174,291,000
Credit-linked notes      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Secured debt 2,100,000,000    
Other Borrowings, Fair Value Disclosure 111,250,000 $ 113,634,000  
Interest Expense, Operating 4,100,000   $ 4,500,000
Warrant      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3 $ 1,100,000