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INTEREST EXPENSE
 12 Months Ended
Dec. 31, 2013
Interest Expense [Abstract]  
INTEREST EXPENSE
INTEREST EXPENSE
Net interest expense consisted of the following:
For the years ended December 31,
 
2013
 
2012
 
2011
In thousands of dollars
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-term debt and lease obligations
 
$
84,604

 
$
81,203

 
$
85,543

Short-term debt
 
8,654

 
23,084

 
17,051

Capitalized interest
 
(1,744
)
 
(5,778
)
 
(7,814
)
 
 
 
 
 
 
 
Interest expense, gross
 
91,514

 
98,509

 
94,780

Interest income
 
(3,158
)
 
(2,940
)
 
(2,597
)
 
 
 
 
 
 
 
Interest expense, net
 
$
88,356

 
$
95,569

 
$
92,183