v3.26.1
Debt Securities Held-to-maturity -Additional Information (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Debt Securities, Held-to-maturity    
Held to maturity securities $ 7,208,328,000 $ 7,620,074,000
Allowance for credit losses 5,900,000 5,812,000
Munis payable from US treasure securities proceeds    
Debt Securities, Held-to-maturity    
Held to maturity securities 0 6,800,000
Obligations of Puerto Rico, States and political subdivisions    
Debt Securities, Held-to-maturity    
Held to maturity securities 42,206,000 51,107,000
Allowance for credit losses 5,900,000 5,812,000
Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes    
Debt Securities, Held-to-maturity    
Held to maturity securities 7,100,000 8,700,000
Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes | Pass    
Debt Securities, Held-to-maturity    
Held to maturity securities 6,300,000 7,900,000
Obligations of Puerto Rico, States and political subdivisions | Munis Not Guaranteed By Puerto Rico Central Government    
Debt Securities, Held-to-maturity    
Held to maturity securities 35,100,000 36,000,000
Past due    
Debt Securities, Held-to-maturity    
Held to maturity securities $ 0 $ 0