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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Realized loss (gain) on hedge derivative contract settlements reclassified into natural gas, NGLs and oil sales from other comprehensive income, tax portion   $ 9,488
De-designated hedges reclassified into natural gas, NGLs and oil sales, tax portion 924 4,747
De-designated hedges reclassified to derivative fair value income, tax portion   889
Change in unrealized deferred hedging (losses) gains, tax effect    $ 2,687