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Investment Securities (Narrative) (Details)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
Item
Dec. 31, 2023
USD ($)
Item
Sep. 30, 2024
USD ($)
Item
Dec. 31, 2023
USD ($)
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Investment securities held to maturity $ 167,009,000 $ 174,982,000 $ 167,009,000 $ 174,982,000
Investment securities held to maturity, allowance for credit loss $ 8,000 8,000 8,000 8,000
Number of investment securities that were transferred from AFS to HTM | Item 0      
Amortization of net unrealized (loss) gain on securities transferred from available-for-sale to held-to-maturity $ (67,000)   (200,000) (251,000)
Unamortized net unrealized losses (9,300,000) (9,500,000) (9,300,000) (9,500,000)
Cumulative unrealized gain (loss) on investment in debt security (121,900,000)   (121,900,000)  
Unrealized losses 42,453,000 50,342,000 42,453,000 50,342,000
Investment securities available for sale, at fair value 259,527,000 229,329,000 259,527,000 229,329,000
Borrowing from BTFB 80,000,000   80,000,000  
Investment securities available for sale, amortized cost 301,014,000 279,427,000 301,014,000 279,427,000
Unamortized net unrealized loss 15,079,000 19,822,000 $ 15,079,000 $ 19,822,000
Florida [Member]        
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Ratio of outstanding uninsured deposits for public deposits secured by securities pledged     50.00% 25.00%
Pledged under public funds, fair value 114,400,000 268,400,000 $ 114,400,000 $ 268,400,000
Corporate Bond Securities [Member]        
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Investment securities held to maturity 9,266,000 9,398,000 9,266,000 9,398,000
Unamortized net unrealized loss 385,000 727,000 385,000 727,000
Corporate Bond Securities [Member] | Florida [Member]        
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Pledged under public funds, fair value 69,700,000 $ 86,900,000 $ 69,700,000 86,900,000
Number of investment securities | Item   28 51  
Mortgage Backed Securities and Collateralized Mortgage Obligations of Government Sponsored Entities [Member]        
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Unrealized losses 46,000,000.0 $ 54,900,000 $ 46,000,000.0 54,900,000
Investment securities available for sale, at fair value 310,600,000 $ 284,100,000 310,600,000 $ 284,100,000
US Government and US Agency Issued Bonds and Mortgage Backed Securities [Member]        
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Investment securities held to maturity 157,700,000   157,700,000  
Investment securities held to maturity, allowance for credit loss 0   0  
Investment Grade Corporate Bonds [Member]        
Debt Securities, Available-for-sale and Held-to-maturity [Line Items]        
Investment securities held to maturity $ 9,300,000   $ 9,300,000