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Other Income (Expense) (Tables)
 6 Months Ended
Jun. 30, 2013
Other Income and Expenses [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Items included in other income (expense) in the Condensed Consolidated Statements of Operations are as follows:
 
Three months ended June 30,
 
Six months ended June 30,
(dollars in thousands)
2013
 
2012
 
2013
 
2012
Gain (loss) on currency translation
$
481

 
$
578

 
$
198

 
$
(391
)
Hedge ineffectiveness
(623
)
 
(189
)
 
(845
)
 
230

Other non-operating income (expense)
193

 
38

 
263

 
(3
)
Other income (expense)
$
51

 
$
427

 
$
(384
)
 
$
(164
)