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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2016
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories at December 31, 2016 and 2015, consisted of the following (amounts in thousands):
 
2016
 
2015
Raw material
$
76,380

 
$
85,490

Work-in-process
32,395

 
31,866

Finished goods
163,461

 
158,997

 
272,236

 
276,353

Adjustment to LIFO basis
(2,945
)
 
(6,562
)
 
$
269,291

 
$
269,791