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INVENTORIES (Tables)
6 Months Ended
Jun. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consisted of the following (amounts in thousands):
 
June 30,
2015
 
December 31,
2014
Raw material
$
93,612

 
$
119,989

Work-in-process
39,904

 
41,073

Finished goods
179,758

 
179,998

 
313,274

 
341,060

Adjustment to LIFO basis
(7,187
)
 
(9,628
)
 
$
306,087

 
$
331,432