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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of reclassifications out of accumulated other comprehensive income
The following table presents reclassifications out of accumulated other comprehensive income related to unrealized gains and losses on available-for-sale securities.
 
 
Three Months Ended 
 June 30,
 
Six Months Ended 
 June 30,
 
Affected Line Item in the Statements of Income
(Dollars in thousands)
 
2017
 
2016
 
2017
 
2016
 
Realized gains (losses) included in net income
 
$
465

 
$
(209
)
 
$
1,750

 
$
(199
)
 
Gains (losses) on investment securities available-for-sale
 
 
465

 
(209
)
 
1,750

 
(199
)
 
Income before income taxes
Tax effect
 
(175
)
 
78

 
(657
)
 
75

 
Income tax expense
Net of tax
 
$
290

 
$
(131
)
 
$
1,093

 
$
(124
)
 
Net income