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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Statement of Comprehensive Income [Abstract] |  |  |  |  |  |
Net income (loss) | $ 666,051 us-gaap_ProfitLoss |  | $ 170,935 us-gaap_ProfitLoss |  | $ (54,249)us-gaap_ProfitLoss |
Reclassification to earnings | 0 us-gaap_PriceRiskCashFlowHedgeGainOrLossReclassifiedToEarningsNet |  | 1,115 us-gaap_PriceRiskCashFlowHedgeGainOrLossReclassifiedToEarningsNet |  | (2,264)us-gaap_PriceRiskCashFlowHedgeGainOrLossReclassifiedToEarningsNet |
Pension liability adjustment | (5,896)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent | [1] | 2,483 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent | [1] | (2,470)us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPortionAttributableToParent | [1]
Total other comprehensive income (loss), net of tax | (5,896)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  | 3,598 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |  | (4,734)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent |
Total comprehensive income (loss) | $ 660,155 us-gaap_ComprehensiveIncomeNetOfTax |  | $ 174,533 us-gaap_ComprehensiveIncomeNetOfTax |  | $ (58,983)us-gaap_ComprehensiveIncomeNetOfTax |
[1] | (2) Refer to Note 1 - Summary of Significant Accounting Policies for detail of the pension amount reclassified to general and administrative expense on the Company’s consolidated statements of operations.

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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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