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CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Statement of Comprehensive Income [Abstract] |  |  |
Net income | $ 40,255 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic | $ 107,031 us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic |
Other comprehensive income (loss), net of taxes: |  |  |
Reclassification adjustment for settled cash flow hedge contracts | 0 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax | 42,565 us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax | [1]
Changes in fair value of cash flow hedge contracts | 0 us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | (80,175)us-gaap_OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax | [2]
Total other comprehensive income (loss) | 0 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent | (37,610)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |
Comprehensive income (loss) | $ 40,255 us-gaap_ComprehensiveIncomeNetOfTax | $ 69,421 us-gaap_ComprehensiveIncomeNetOfTax |
[1] | Net of income taxes of $(28,210) for the three months ended March 31, 2014.
[2] | Net of income taxes of $53,135 for the three months ended March 31, 2014.

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=6519514 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Comprehensive Income -URI http://asc.fasb.org/extlink&oid=35737396 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=6518256 + Details
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