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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2012
Fair Value Disclosures [Abstract]  
Schedule of financial assets and liabilities measured on a recurring basis
The fair value of all derivative contracts is reflected on the balance sheet as detailed in the following schedule:
 
 
December 31,
 
 
2012
 
2011
 
 
Significant Other
Observable Inputs
Description
 
(Level 2)
 
 
(In thousands)
Assets:
 
 

 
 

Fair value of commodity derivatives
 
$
11,731

 
$

Total assets
 
$
11,731

 
$

Liabilities:
 
 

 
 

Fair value of commodity derivatives
 
$

 
$
6,127

Total liabilities
 
$

 
$
6,127

Schedule of comparison of fair value to the carrying value of the 2019 Senior Notes
Fair value is compared to the carrying value in the table below:
 
 
 
December 31, 2012
 
December 31, 2011
 
 
Carrying
 
Estimated
 
Carrying
 
Estimated
Description
 
Amount
 
Fair Value
 
Amount
 
Fair Value
 
 
(In thousands)
7.75% Senior Notes due 2019
 
$
349,585

 
$
348,700

 
$
349,535

 
$
334,300