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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2016
Accumulated Other Comprehensive Income / (Loss) [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
(dollars in thousands)
Beginning Balance
$
—

 
$
17

 
$
592

Defined benefit plans
—

 
—

 
(344
)
Foreign currency translation
(2
)
 
(17
)
 
(231
)
Ending Balance
$
(2
)
 
$
—

 
$
17