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Acquisitions and Goodwill Goodwill (Tables)
 3 Months Ended
Mar. 31, 2017
Goodwill Rollforward [Abstract]  
Schedule of Goodwill [Table Text Block]
Goodwill activity for the first quarter of 2017 and 2016 is included in the table below:
 
(Dollars in thousands)
 
Three Months Ended March 31,
 
2017
 
2016
Beginning balance
$
5,520

 
$
319

    Acquisition
—

 
1,254

Impact of foreign exchange
40

 
20

Ending balance
$
5,560

 
$
1,593