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Goodwill (Tables)
 9 Months Ended
Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
Goodwill activity for the first nine months of 2018 and 2017 is included in the table below:
 
(Dollars in thousands)
 
Nine Months Ended September 30,
 
2018
 
2017
Beginning balance
$
19,614

 
$
5,520

    Adjustment to original acquisition allocation
(17
)
 
(73
)
Impact of foreign exchange
(483
)
 
342

Ending balance
$
19,114

 
$
5,789