101 - Document - Document and Entity Information link:calculationLink link:presentationLink link:definitionLink 103 - Statement - CONSOLIDATED BALANCE SHEETS link:calculationLink link:presentationLink link:definitionLink 104 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 105 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:calculationLink link:presentationLink link:definitionLink 106 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY link:calculationLink link:presentationLink link:definitionLink 107 - Statement - CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 108 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:calculationLink link:presentationLink link:definitionLink 109 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) link:calculationLink link:presentationLink link:definitionLink 110 - Disclosure - Organization and Nature of Operations link:calculationLink link:presentationLink link:definitionLink 111 - Disclosure - Basis of Presentation link:calculationLink link:presentationLink link:definitionLink 112 - Disclosure - Exploratory Well Costs link:calculationLink link:presentationLink link:definitionLink 113 - Disclosure - Disclosures About Fair Value Measurements link:calculationLink link:presentationLink link:definitionLink 114 - Disclosure - Income Taxes link:calculationLink link:presentationLink link:definitionLink 115 - Disclosure - Long-term Debt link:calculationLink link:presentationLink link:definitionLink 116 - Disclosure - Derivative Financial Instruments link:calculationLink link:presentationLink link:definitionLink 117 - Disclosure - Asset Retirement Obligations link:calculationLink link:presentationLink link:definitionLink 118 - Disclosure - Postretirement Benefit Obligations link:calculationLink link:presentationLink link:definitionLink 119 - Disclosure - Commitments and Contingencies link:calculationLink link:presentationLink link:definitionLink 120 - Disclosure - Net Income (Loss) Per Share Attributable To Common Stockholders link:calculationLink link:presentationLink link:definitionLink 121 - Disclosure - Geographic Operating Segment Information link:calculationLink link:presentationLink link:definitionLink 122 - Disclosure - Impairment of Oil and Gas Properties link:calculationLink link:presentationLink link:definitionLink 123 - Disclosure - Volumetric Production Payments link:calculationLink link:presentationLink link:definitionLink 124 - Disclosure - Gain (Loss) on Disposition of Assets, Net link:calculationLink link:presentationLink link:definitionLink 125 - Disclosure - Interest and Other Income link:calculationLink link:presentationLink link:definitionLink 126 - Disclosure - Other Expense link:calculationLink link:presentationLink link:definitionLink 127 - Disclosure - Insurance Claims link:calculationLink link:presentationLink link:definitionLink 128 - Disclosure - Discontinued Operations link:calculationLink link:presentationLink link:definitionLink 129 - Disclosure - Subsequent Events link:calculationLink link:presentationLink link:definitionLink