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Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2020
Equity [Abstract]  
Summary of Components of Other Comprehensive Income
The tables below provide a summary of the components of OCI for the periods presented.
 
 
 
Year Ended December 31,
 
 
 
2020
 
 
2019
 
 
2018
 
 
 
Before-tax
 
 
Tax effect
 
 
After-tax
 
 
 Before-tax 
 
 
Tax effect
 
 
 After-tax 
 
 
 Before-tax 
 
 
 Tax effect 
 
 
  After-tax
 
 
 
                    (Dollars in thousands)
 
Investment securities:
 
      
 
      
 
      
 
      
 
      
 
      
 
      
 
      
 
      
Net change in fair value recorded in accumulated
OCI
   $ 32,849     $ (9,711 )    $ 23,138     $ 45,486     $ (13,447 )    $ 32,039     $ (26,435 )    $ 7,815     $ (18,620 ) 
Amortization of unrealized (losses) gains on securities transferred from
available-
for-sale
to
held-to-
maturity
     (572 )      169       (403 )      (1,614 )      477       (1,137 )      (2,091 )      619       (1,472 ) 
Net realized gain reclassified into earnings (1)
     -       -       -       (5 )      1       (4 )      -           -           -      
   
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
Net change
   $ 32,277     $ (9,542 )    $ 22,735     $ 43,867     $ (12,969 )    $ 30,898     $ (28,526 )    $ 8,434     $ (20,092 ) 
   
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
    
 
 
  
 
  (1)
Included in other noninterest income.