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Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2020
Equity [Abstract]  
Summary of Components of Other Comprehensive Income
The table below provides a summary of the components of other comprehensive income (“OCI”) for the periods presented.
 
   
Three Months Ended June 30,
   
2020
  
2019
   
 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
     $ (1,263 )      $ 373       $ (890 )      $ 19,564       $ (5,784 )      $ 13,780  
Amortization of net unrealized losses on securities
transferred from
available-for-sale
to
held-to-maturity
     (17 )      5       (12 )      (78 )      23       (55 ) 
 
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  Net change
     $ (1,280 )      $ 378       $ (902 )      $ 19,486       $ (5,761 )      $ 13,725  
 
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
   
Six Months Ended June 30,
   
2020
  
2019
   
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
     $ 35,356       $ (10,453 )      $ 24,903       $ 38,914       $ (11,504 )      $ 27,410  
Amortization of net unrealized losses on securities
transferred from
available-for-sale
to
held-to-maturity
     (18 )      5       (13 )      (1,201 )      355       (846 ) 
 
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
  Net change
     $ 35,338       $ (10,448 )      $ 24,890       $ 37,713       $ (11,149 )      $ 26,564