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Accumulated Other Comprehensive Loss (Tables)
 3 Months Ended
Mar. 31, 2018
Equity [Abstract]  
Schedule of changes in accumulated other comprehensive income (loss), net of tax
The table below presents information about the effects of net income (loss) of significant amounts reclassified out of accumulated other comprehensive income (loss), net of tax, associated with unrealized gains (losses) on securities during the three months ended March 31, 2018 and 2017 (in thousands):
 
Three Months Ended March 31,
 
2018
 
2017
Beginning balance
$
(3,908
)
 
$
(3,838
)
Holding (losses) gains arising during period, net of tax
(454
)
 
92

Ending balance
$
(4,362
)
 
$
(3,746
)