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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2018
Accumulated Other Comprehensive Income [Abstract]  
Amounts Reclassified from Accumulated Other Comprehensive Income (AOCI)
Amounts reclassified from accumulated other comprehensive income (AOCI) and the affected line items in the statements of income during the years ended December 31, 2018, 2017, and 2016 were:

  
Amounts Reclassified from AOCI
 
Year Ended December 31
(in thousands)
 
2018
  
2017
  
2016
 
Affected line item in the statements of income
         
Securities gains (losses)
 
$
(821
)
 
$
73
  
$
522
 
Tax expense (benefit)
  
(172
)
  
26
   
183
 
Total reclassifications out of AOCI
 
$
(649
)
 
$
47
  
$
339