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Goodwill (Tables)
 9 Months Ended
Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
Goodwill activity for the first nine months of 2019 and 2018 is included in the table below:
 
(Dollars in thousands)
 
Nine Months Ended September 30,
 
2019
 
2018
Beginning balance
$
20,079

 
$
19,614

Adjustment to original acquisition allocation
(12
)
 
(17
)
Impact of foreign exchange
515

 
(483
)
Ending balance
$
20,582

 
$
19,114