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Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 220022001 - Disclosure - Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 230033001 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 240044001 - Disclosure - Significant Accounting Policies - Schedule of Cash and Restricted Cash (Details) link:presentationLink link:calculationLink link:definitionLink 240054002 - Disclosure - Significant Accounting Policies - Trade Accounts Receivable and Allowance for Credit Losses (Details) link:presentationLink link:calculationLink link:definitionLink 240064003 - Disclosure - Significant Accounting Policies - Property, Plant and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 240074004 - Disclosure - Significant Accounting Policies - Impairment of Proved and Unproved Properties (Details) link:presentationLink link:calculationLink link:definitionLink 240084005 - 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Disclosure - Acquisitions and Dispositions link:presentationLink link:calculationLink link:definitionLink 230223004 - Disclosure - Acquisitions and Dispositions (Tables) link:presentationLink link:calculationLink link:definitionLink 240234014 - Disclosure - Acquisitions and Dispositions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 240244015 - Disclosure - Acquisitions and Dispositions - Consideration Given In Acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 240254016 - Disclosure - Acquisitions and Dispositions - Fair Value of Net Assets Acquired (Details) link:presentationLink link:calculationLink link:definitionLink 240264017 - Disclosure - Acquisitions and Dispositions - Post Acquisition Operating Results (Details) link:presentationLink link:calculationLink link:definitionLink 210271005 - Disclosure - Stock Repurchase link:presentationLink link:calculationLink link:definitionLink 240284018 - Disclosure - Stock Repurchase (Details) link:presentationLink link:calculationLink link:definitionLink 210291006 - 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Pension - Weighted Average Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 240754048 - Disclosure - Pension - Expected Future Benefit Payment (Details) link:presentationLink link:calculationLink link:definitionLink 210761015 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 230773013 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 240784049 - Disclosure - Stock-Based Compensation - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 240794050 - Disclosure - Stock-Based Compensation - Options Granted, Assumptions and Weighted Average Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 240804051 - Disclosure - Stock-Based Compensation - Stock and Performance Options Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 240814052 - Disclosure - Stock-Based Compensation - Restricted and Performance Stock Unit Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 210821016 - Disclosure - Supplemental Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 230833014 - Disclosure - Supplemental Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 240844053 - Disclosure - Supplemental Cash Flow Information (Details) link:presentationLink link:calculationLink link:definitionLink 210851017 - Disclosure - Concentrations of Credit Risk and Major Customers link:presentationLink link:calculationLink link:definitionLink 230863015 - Disclosure - Concentrations of Credit Risk and Major Customers - (Tables) link:presentationLink link:calculationLink link:definitionLink 240874054 - Disclosure - Concentrations of Credit Risk and Major Customers - Summary (Details) link:presentationLink link:calculationLink link:definitionLink 240884055 - Disclosure - 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Disclosure - Supplemental Gas Data (unaudited) link:presentationLink link:calculationLink link:definitionLink 231103020 - Disclosure - Supplemental Gas Data (unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 241114067 - Disclosure - Supplemental Gas Data (unaudited) - Capitalized Costs (Details) link:presentationLink link:calculationLink link:definitionLink 241124068 - Disclosure - Supplemental Gas Data (unaudited) - Costs Incurred for Property Acquisition, Exploration and Development (Details) link:presentationLink link:calculationLink link:definitionLink 241134069 - Disclosure - Supplemental Gas Data (unaudited) - Results of Operations (Details) link:presentationLink link:calculationLink link:definitionLink 241144070 - Disclosure - Supplemental Gas Data (unaudited) - Average Unit Prices and Average Production Costs (Details) link:presentationLink link:calculationLink link:definitionLink 241154071 - Disclosure - Supplemental Gas Data (unaudited) - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 241164072 - 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