v3.26.1
Investments at Fair Value - Summary of Geographic Composition of Investments at Fair Value (Detail)
Mar. 31, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Investment fair value percentage 100.00% 100.00%
United States [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Investment fair value percentage 91.00% 96.20%
Canada [Member]    
Debt Securities, Available-for-Sale [Line Items]    
Investment fair value percentage 9.00% 3.80%