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The amortized cost and fair value of investment securities at March 31, 2021, by contractual maturity, are shown in the following schedule. Expected maturities will differ from contractual maturities because borrowers may have the right to call or prepay (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
 Investment Securities Activity    
Due in one year or less, amortized cost $ 1,029  
Due in one year or less, fair value 1,042  
Due after one year through five years, amortized cost 6,433  
Due after one year through five years, fair value 6,560  
Due after five years through ten years, amortized cost 8,905  
Due after five years through ten years, fair value 9,118  
Due after ten years, amortized cost 29,511  
Due after ten years, fair value 29,572  
Amortized cost, total 45,878 $ 47,467
Approximate fair value $ 46,292 $ 48,406