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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)
 12 Months Ended
Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Accumulated other comprehensive income (loss) consisted of the following at the dates set forth below (amounts in thousands):
 
Currency
Translation
Adjustments
 
Unrecognized
Losses and
Prior Service
Cost
 
 
 
Total
Balance at January 1, 2016
$
(161,030
)
 
$
(26,721
)
 
$
(187,751
)
Currency translation adjustments
(1,598
)
 
—

 
(1,598
)
  Defined benefit pension plan entries:
 

 
 

 
 

  Unrecognized prior service cost, net of tax of $0
—

 
137

 
137

  Unrecognized net loss, net of tax of $(439)
—

 
934

 
934

Balance at December 31, 2016
(162,628
)
 
(25,650
)
 
(188,278
)
Currency translation adjustments
29,679

 
—

 
29,679

  Defined benefit pension plan entries:
 

 
 

 
 

  Unrecognized prior service cost, net of tax of $0
—

 
136

 
136

  Unrecognized net gain, net of tax of $215
—

 
1,387

 
1,387

Balance at December 31, 2017
$
(132,949
)
 
$
(24,127
)
 
$
(157,076
)