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INVENTORIES (Tables)
 12 Months Ended
Dec. 31, 2015
INVENTORIES [Abstract]  
Inventories

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

in thousands

 2015 

 

 

 2014 

 

Inventories

 

 

 

 

 

Finished products  1

$      297,925 

 

 

$     275,172 

 

Raw materials

 21,765 

 

 

 19,741 

 

Products in process

 1,008 

 

 

 1,250 

 

Operating supplies and other

 26,375 

 

 

 25,641 

 

Total

$      347,073 

 

 

$     321,804 

 

 

 

 

1

Includes inventories encumbered by the purchaser's percentage of volumetric production payments (see Note 1, Deferred Revenue), as follows: December 31, 2015 — $4,452 thousand and December 31, 2014 — $4,792 thousand.