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FAIR VALUE ACCOUNTING (Tables)
 6 Months Ended
Jun. 30, 2013
Fair Value Disclosures [Abstract]  
Cash Flow Hedging Derivative Assets and Liabilities
A summary of our cash flow hedging derivative assets and liabilities measured at fair value on a recurring basis as of December 31, 2012, is as follows:
Description
 
Fair Value as of December 31, 2012
 
Quoted Prices in Active Markets of Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs
(Level 3)
In thousands of dollars
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
Cash flow hedging derivatives
 
$
39,175

 
$
37,056

 
$
2,119

 
$
—

Liabilities
 
 
 
 
 
 
 
 
Cash flow hedging derivatives
 
$
53,407

 
$
39,066

 
$
14,341

 
$
—

A summary of our cash flow hedging derivative assets and liabilities measured at fair value on a recurring basis as of June 30, 2013, is as follows:
Description
 
Fair Value as of June 30, 2013
 
Quoted Prices in Active Markets of Identical Assets (Level 1)
 
Significant Other Observable Inputs (Level 2)
 
Significant Unobservable Inputs
(Level 3)
In thousands of dollars
 
 
 
 
 
 
 
 
Assets
 
 
 
 
 
 
 
 
Cash flow hedging derivatives
 
$
75,795

 
$
58,093

 
$
17,702

 
$
—

Liabilities
 
 
 
 
 
 
 
 
Cash flow hedging derivatives
 
$
56,252

 
$
55,931

 
$
321

 
$
—