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Equity (Tables)
 12 Months Ended
Dec. 31, 2018
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss)
Amounts recognized, net of tax, in Accumulated other comprehensive income (loss) at December 31, 2018 2017 consist of (in thousands):
 
2018
 
2017
Prior service cost
$
593

 
$
541

Unrecognized net actuarial loss and foreign exchange
(6,243
)
 
(8,703
)
Fair value of derivatives
194

 
(191
)
   Total Accumulated other comprehensive (loss)
$
(5,456
)
 
$
(8,353
)