100000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 100010 - Statement - CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 100020 - Disclosure - Commitments and Contingencies - Schedule of Lease Liabilities with Enforceable Contract Terms are Greater Than One year Mature (Detail) 2 link:presentationLink link:calculationLink link:definitionLink 100030 - Disclosure - Derivative Activities - Combined Fair Value of Derivatives, by Consolidated Balance Sheets (Detail) 2 link:presentationLink link:calculationLink link:definitionLink 100040 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 100050 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 100060 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) link:presentationLink link:calculationLink link:definitionLink 100070 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 100080 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY link:presentationLink link:calculationLink link:definitionLink 100090 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 100100 - Disclosure - Summary of Organization and Nature of Business link:presentationLink link:calculationLink link:definitionLink 100110 - Disclosure - Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 100120 - Disclosure - Accounting Standards link:presentationLink link:calculationLink link:definitionLink 100130 - Disclosure - Dispositions link:presentationLink link:calculationLink link:definitionLink 100140 - Disclosure - Revenues from Contracts with Customers link:presentationLink link:calculationLink link:definitionLink 100150 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 100160 - Disclosure - Net Income (Loss) Per Common Share link:presentationLink link:calculationLink link:definitionLink 100170 - Disclosure - Indebtedness link:presentationLink link:calculationLink link:definitionLink 100180 - Disclosure - Asset Retirement Obligations link:presentationLink link:calculationLink link:definitionLink 100190 - Disclosure - Derivative Activities link:presentationLink link:calculationLink link:definitionLink 100200 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 100210 - Disclosure - Stock-based Compensation Plans link:presentationLink link:calculationLink link:definitionLink 100220 - Disclosure - Capital Stock link:presentationLink link:calculationLink link:definitionLink 100230 - Disclosure - Supplemental Cash Flow Information link:presentationLink link:calculationLink link:definitionLink 100240 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 100250 - Disclosure - Exit and Termination Costs link:presentationLink link:calculationLink link:definitionLink 100260 - Disclosure - Suspended Exploratory Well Costs link:presentationLink link:calculationLink link:definitionLink 100270 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) link:presentationLink link:calculationLink link:definitionLink 100280 - Disclosure - Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 100290 - Disclosure - Revenues from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 100300 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 100310 - Disclosure - Net Income (Loss) Per Common Share (Tables) link:presentationLink link:calculationLink link:definitionLink 100320 - Disclosure - Indebtedness (Tables) link:presentationLink link:calculationLink link:definitionLink 100330 - Disclosure - Asset Retirement Obligations (Tables) link:presentationLink link:calculationLink link:definitionLink 100340 - Disclosure - Derivative Activities (Tables) link:presentationLink link:calculationLink link:definitionLink 100350 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 100360 - Disclosure - Stock-based Compensation Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 100370 - Disclosure - Capital Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 100380 - Disclosure - Supplemental Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 100390 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 100400 - Disclosure - Exit and Termination Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 100410 - Disclosure - Suspended Exploratory Well Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 100420 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 100430 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100440 - Disclosure - Dispositions - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100450 - Disclosure - Revenues from Contracts with Customers - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100460 - Disclosure - Revenues from Contracts with Customers - Disaggregation of Revenue by Identified Revenue Stream (Detail) link:presentationLink link:calculationLink link:definitionLink 100470 - Disclosure - Income Taxes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100480 - Disclosure - Income Taxes - Reconciliation Between Statutory Federal Income Tax Rate and Effective Income Tax (Detail) link:presentationLink link:calculationLink link:definitionLink 100490 - Disclosure - Income Taxes - Income Tax Expense (Benefit) Attributable to Income (Loss) Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 100500 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) link:presentationLink link:calculationLink link:definitionLink 100510 - Disclosure - Income Taxes - Changes in Deferred Tax Asset Valuation Allowances (Detail) link:presentationLink link:calculationLink link:definitionLink 100520 - Disclosure - Net Income (Loss) Per Common Share - Computations of Basic and Diluted Income (Loss) Per Common Share (Detail) link:presentationLink link:calculationLink link:definitionLink 100530 - Disclosure - Net Income (Loss) Per Common Share - Basic Weighted Average Common Shares Outstanding to Diluted Weighted Average Common Shares Outstanding (Detail) link:presentationLink link:calculationLink link:definitionLink 100540 - Disclosure - Net Income (Loss) Per Common Share - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100550 - Disclosure - Indebtedness - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100560 - Disclosure - Indebtedness - Debt Outstanding (Detail) link:presentationLink link:calculationLink link:definitionLink 100570 - Disclosure - Indebtedness - Debt Outstanding (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 100580 - Disclosure - Indebtedness - Bank Debt - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100590 - Disclosure - Indebtedness - New Senior Notes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100600 - Disclosure - Indebtedness - Senior Subordinated Notes - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100610 - Disclosure - Indebtedness - Guarantees and Debt Covenants and Maturity - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100620 - Disclosure - Indebtedness - Schedule for Long-Term Debt Outstanding (Detail) link:presentationLink link:calculationLink link:definitionLink 100630 - Disclosure - Asset Retirement Obligations - Asset Retirement Obligations (Detail) link:presentationLink link:calculationLink link:definitionLink 100640 - Disclosure - Derivative Activities - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100650 - Disclosure - Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Detail) link:presentationLink link:calculationLink link:definitionLink 100660 - Disclosure - Derivative Activities - Derivative Volumes Hedged and Average Hedge Prices (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 100670 - Disclosure - Derivative Activities - Combined Fair Value of Derivatives, by Consolidated Balance Sheets (Detail) link:presentationLink link:calculationLink link:definitionLink 100680 - Disclosure - Derivative Activities - Effects of Derivatives on Consolidated Statements of Operations (Detail) link:presentationLink link:calculationLink link:definitionLink 100690 - Disclosure - Fair Value Measurements - Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value (Detail) link:presentationLink link:calculationLink link:definitionLink 100700 - Disclosure - Fair Value Measurements - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100710 - Disclosure - Fair Value Measurements - Reconciliation of the Beginning and Ending Balances for Derivative Instruments Classified as Level 3 in the Fair Value Hierarchy (Detail) link:presentationLink link:calculationLink link:definitionLink 100720 - Disclosure - Fair Value Measurements - Value of Assets Measured at Fair Value on Nonrecurring Basis (Detail) link:presentationLink link:calculationLink link:definitionLink 100730 - Disclosure - Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Detail) link:presentationLink link:calculationLink link:definitionLink 100740 - Disclosure - Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 100750 - Disclosure - Stock-based Compensation Plans - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100760 - Disclosure - Stock-based Compensation Plans - Allocation of Stock-Based Compensation by Functional Category (Detail) link:presentationLink link:calculationLink link:definitionLink 100770 - Disclosure - Stock-based Compensation Plans - Additional Information 1 (Detail) link:presentationLink link:calculationLink link:definitionLink 100780 - Disclosure - Stock-based Compensation Plans - Additional Information 2 (Detail) link:presentationLink link:calculationLink link:definitionLink 100790 - Disclosure - Stock-based Compensation Plans - Restricted Stock and Restricted Stock Units Outstanding (Detail) link:presentationLink link:calculationLink link:definitionLink 100800 - Disclosure - Stock-based Compensation Plans - Additional Information 3 (Detail) link:presentationLink link:calculationLink link:definitionLink 100810 - Disclosure - Stock-based Compensation Plans - PG/RG-PSUs Activities (Detail) link:presentationLink link:calculationLink link:definitionLink 100820 - Disclosure - Stock-based Compensation Plans - PG/RG-PSUs Activities (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 100830 - Disclosure - Stock-based Compensation Plans - Valuation Assumptions for Grant Date Fair Value of Performance Awards (Detail) link:presentationLink link:calculationLink link:definitionLink 100840 - Disclosure - Stock-based Compensation Plans - TSR - PSUs Activities (Detail) link:presentationLink link:calculationLink link:definitionLink 100850 - Disclosure - Stock-based Compensation Plans - TSR - PSUs Activities (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 100860 - Disclosure - Stock-based Compensation Plans - Additional Information 4 (Detail) link:presentationLink link:calculationLink link:definitionLink 100870 - Disclosure - Stock-based Compensation Plans - Summary of Change in Post Retirement Benefit Obligation (Detail) link:presentationLink link:calculationLink link:definitionLink 100880 - Disclosure - Stock-based Compensation Plans - Summary of Assumptions Used to Determine Benefit Obligation (Detail) link:presentationLink link:calculationLink link:definitionLink 100890 - Disclosure - Stock-based Compensation Plans - Additional Information 5 (Detail) link:presentationLink link:calculationLink link:definitionLink 100900 - Disclosure - Capital Stock - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100910 - Disclosure - Capital Stock - Schedule of Changes in Number of Common Shares Outstanding (Detail) link:presentationLink link:calculationLink link:definitionLink 100920 - Disclosure - Capital Stock - Schedule of Change in Treasury Shares (Detail) link:presentationLink link:calculationLink link:definitionLink 100930 - Disclosure - Supplemental Cash Flow Information - Supplemental Cash Flow Information (Detail) link:presentationLink link:calculationLink link:definitionLink 100940 - Disclosure - Commitments and Contingencies - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 100950 - Disclosure - Commitments and Contingencies - Schedule of Components of Lease Expense (Detail) link:presentationLink link:calculationLink link:definitionLink 100960 - Disclosure - Commitments and Contingencies - Supplemental Cash Flow Information Related to Operating Leases (Detail) link:presentationLink link:calculationLink link:definitionLink 100970 - Disclosure - Commitments and Contingencies - Supplemental Balance Sheet Information Related to Operating Leases (Detail) link:presentationLink link:calculationLink link:definitionLink 100980 - Disclosure - Commitments and Contingencies - Schedule of Weighted Average Remaining Lease Term and Weighted Average Discount Rate for Operating Leases (Detail) link:presentationLink link:calculationLink link:definitionLink 100990 - Disclosure - Commitments and Contingencies - Schedule of Lease Liabilities with Enforceable Contract Terms are Greater Than One year Mature (Detail) link:presentationLink link:calculationLink link:definitionLink 101000 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Transportation Fees Due (Detail) link:presentationLink link:calculationLink link:definitionLink 101010 - Disclosure - Commitments and Contingencies - Schedule of Estimated Settlement of Divestiture Contract Obligation Based on Discounted Value (Detail) link:presentationLink link:calculationLink link:definitionLink 101020 - Disclosure - Commitments and Contingencies - Future Delivery Commitments (Detail) link:presentationLink link:calculationLink link:definitionLink 101030 - Disclosure - Exit and Termination Costs - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 101040 - Disclosure - Exit and Termination Costs - Summary of Exit and Termination Costs (Detail) link:presentationLink link:calculationLink link:definitionLink 101050 - Disclosure - Exit and Termination Costs - Exit and Termination Costs Included in Accrued Liabilities in Consolidated Balance Sheet - (Detail) link:presentationLink link:calculationLink link:definitionLink 101060 - Disclosure - Suspended Exploratory Well Costs - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 101070 - Disclosure - Suspended Exploratory Well Costs - Schedule Of Changes In Capitalized Exploratory Well Costs (Detail) link:presentationLink link:calculationLink link:definitionLink 101080 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Capitalized Costs and Accumulated Depreciation, Depletion and Amortization (Detail) link:presentationLink link:calculationLink link:definitionLink 101090 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Costs Incurred for Property Acquisition, Exploration and Development (Detail) link:presentationLink link:calculationLink link:definitionLink 101100 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Additional Information (Detail) link:presentationLink link:calculationLink link:definitionLink 101110 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Proved Developed and Undeveloped Reserves (Detail) link:presentationLink link:calculationLink link:definitionLink 101120 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Changes in Proved Undeveloped Reserves (Detail) link:presentationLink link:calculationLink link:definitionLink 101130 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Changes in Proved Undeveloped Reserves (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 101140 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows (Detail) link:presentationLink link:calculationLink link:definitionLink 101150 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Standardized Measure of Discounted Future Net Cash Flows (Parenthetical) (Detail) link:presentationLink link:calculationLink link:definitionLink 101160 - Disclosure - Supplemental Information on Natural Gas and Oil Exploration, Development and Production Activities (Unaudited) - Changes in Discounted Future Net Cash Flows (Detail) link:presentationLink link:calculationLink link:definitionLink