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Debt Securities Held-to-maturity - Delinquency status (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Debt Securities, Held-to-maturity    
Held to maturity securities $ 79,461 $ 92,621
Obligations of Puerto Rico, States and political subdivisions    
Debt Securities, Held-to-maturity    
Held to maturity securities 73,476 81,029
Collateralized Mortgage Obligations - Federal agencies    
Debt Securities, Held-to-maturity    
Held to maturity securities 25 31
Securities in wholly owned statutory business trusts    
Debt Securities, Held-to-maturity    
Held to maturity securities $ 5,960 $ 11,561