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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Statement Of Income And Comprehensive Income [Abstract] |  |  |  |
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 | 1,332 | 10,688 | 4,122 | 27,337
De-designated hedges reclassified to derivative fair value income, tax portion |  | 279 |  | 1,518
Change in unrealized deferred hedging (losses) gains, tax effect |  |  |  | $ 2,687

X
- Definition Amount of taxes related to reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments, previously designated and qualifying as the effective portion of cash flow hedges which are now being amortized and reclassified into Natural gas, NGLs and oil sales. + References No definition available. + Details
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- Definition Amount of taxes related to reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated, previously qualifying as cash flow hedges but relate to transactions not probable of occurring. + References No definition available. + Details
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- Definition Amount of tax expense (benefit), after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e640-108580 + Details
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