XML 105 R89.htm IDEA: XBRL DOCUMENT v3.23.1
Debt Securities Held-to-maturity -Additional Information (Details)
Mar. 31, 2023
USD ($)
score
Dec. 31, 2022
USD ($)
score
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Schedule of Held-to-maturity Securities [Line Items]        
Held to maturity securities $ 9,352,385,000 $ 9,356,739,000    
Allowance for credit losses 6,792,000 6,911,000    
Obligations of Puerto Rico, States and political subdivisions        
Schedule of Held-to-maturity Securities [Line Items]        
Held to maturity securities 62,425,000 65,921,000    
Allowance for credit losses $ 6,792,000 $ 6,911,000 $ 7,844,000 $ 8,096,000
Average Credit Score Fico | score 707 707    
Percentage of nominal value 66.00% 65.00%    
Obligations of Puerto Rico, States and political subdivisions | Munis Payable From Real and Personal Property Taxes        
Schedule of Held-to-maturity Securities [Line Items]        
Held to maturity securities $ 21,560,000 $ 24,660,000    
Allowance for credit losses 300,000 300,000    
Obligations of Puerto Rico, States and political subdivisions | Munis Not Guaranteed By Puerto Rico Central Government        
Schedule of Held-to-maturity Securities [Line Items]        
Held to maturity securities 41,000,000 42,000,000    
Allowance for credit losses 6,500,000 6,600,000    
Past due        
Schedule of Held-to-maturity Securities [Line Items]        
Held to maturity securities $ 0 $ 0