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Accumulated Other Comprehensive Income (Tables)
12 Months Ended
Dec. 31, 2013
Equity [Abstract]  
Changes in accumulated other comprehensive income
Changes in accumulated other comprehensive income (loss) by component, net of tax, are as follows:
 
Net Gains (Losses) on Cash Flow Hedges
 
2013
 
2012
 
2011
 
(In thousands)
Balance at January 1:
$
7,587

 
$
19,026

 
$
(6,851
)
Other comprehensive income before reclassification
(7,349
)
 
18,635

 
29,384

Amounts reclassified from accumulated other comprehensive income
(238
)
 
(30,074
)
 
(3,507
)
New current-period other comprehensive income
(7,587
)
 
(11,439
)
 
25,877

Balance at December 31:
$

 
$
7,587

 
$
19,026

Schedule of accumulated other comprehensive income
Amounts reclassified from accumulated other comprehensive income (loss) into the consolidated statements of income for the year ended December 31:
 
2013
 
2012
 
2011
 
Affected Line Item in the Statement Where Net Income is Presented
 
(In thousands)
 
 
Net gains (loss) on cash flow hedges
 
 
 
 
 
 
 
Commodity derivatives
$
603

 
$
51,853

 
$
2,965

 
Oil and natural gas revenues
Commodity derivatives
(190
)
 
(2,616
)
 
2,749

 
Gain (loss) on derivatives not designated as hedges and hedge ineffectiveness, net
 
413

 
49,237

 
5,714

 
Total before tax
 
(175
)
 
(19,163
)
 
(2,207
)
 
Tax expense
Total reclassification for the period
$
238

 
$
30,074

 
$
3,507

 
Net of tax