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Reserve for Severance (Tables)
 9 Months Ended
Sep. 30, 2017
Severance Reserve [Abstract]  
Changes in the Company's reserve for severance and related payments
Changes in the Company’s reserve for severance as of September 30, 2017 and 2016 were as follows:
 
(Dollars in thousands)
 
Nine Months Ended September 30,
 
2017
 
2016
Balance at beginning of period
$
1,710

 
$
697

Charged to earnings
595

 
714

Payments
(1,625
)
 
(950
)
Balance at end of period
$
680

 
$
461