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Segments and Geographic Information (Tables)
 12 Months Ended
Dec. 31, 2016
Segment Reporting [Abstract]  
Revenue by Geographic Areas
Revenue by geographic region consisted of the following for the periods stated:
 
December 31,
(Dollars in thousands)
2016
 
2015
 
2014
Revenue
 
 
 
 
 
United States
$
173,852

 
$
185,741

 
$
194,886

International
5,709

 
3,887

 
5,387

Total revenue
$
179,561

 
$
189,628

 
$
200,273