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Accumulated Other Comprehensive Income (Tables)
3 Months Ended
Mar. 31, 2019
Accumulated Other Comprehensive Income [Abstract]  
Accumulated Other Comprehensive Income [Table Text Block]
Foreign currencyDerivatives
translation qualifying asDefined benefit
(in thousands)adjustmentshedgespension plansTotal
 
Balance at December 31, 2018$(12,630)$(170)$(732)$(13,532)
Other comprehensive income (loss) before reclassifications4(196)-(192)
Amounts reclassified from AOCI-17-17
 
Other comprehensive income (loss)4(179)-(175)
 
Balance at March 31, 2019$(12,626)$(349)$(732)$(13,707)