1001 - Document - Document and Entity Information link:calculationLink link:presentationLink link:definitionLink 1003 - Statement - Consolidated Balance Sheets link:calculationLink link:presentationLink link:definitionLink 1004 - Statement - Consolidated Balance Sheets (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 1005 - Statement - Consolidated Statements of Income link:calculationLink link:presentationLink link:definitionLink 1006 - Statement - Consolidated Statements of Stockholders' Equity link:calculationLink link:presentationLink link:definitionLink 1007 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 1008 - Statement - Consolidated Statements of Cash Flows link:calculationLink link:presentationLink link:definitionLink 1009 - Statement - Consolidated Statements of Cash Flows (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 1010 - Disclosure - Summary of Significant Accounting Policies link:calculationLink link:presentationLink link:definitionLink 1011 - Disclosure - Acquisition of Working Interests in Natural Gas Properties link:calculationLink link:presentationLink link:definitionLink 1012 - Disclosure - Income Per Common Share link:calculationLink link:presentationLink link:definitionLink 1013 - Disclosure - Accounts Receivable, net link:calculationLink link:presentationLink link:definitionLink 1014 - Disclosure - Inventories link:calculationLink link:presentationLink link:definitionLink 1015 - Disclosure - Property, Plant and Equipment link:calculationLink link:presentationLink link:definitionLink 1016 - Disclosure - Current and Noncurrent Accrued and Other Liabilities link:calculationLink link:presentationLink link:definitionLink 1017 - Disclosure - Accrued Warranty Costs link:calculationLink link:presentationLink link:definitionLink 1018 - Disclosure - Asset Retirement Obligations link:calculationLink link:presentationLink link:definitionLink 1019 - Disclosure - Long-Term Debt link:calculationLink link:presentationLink link:definitionLink 1020 - Disclosure - Income Taxes link:calculationLink link:presentationLink link:definitionLink 1021 - Disclosure - Commitments and Contingencies link:calculationLink link:presentationLink link:definitionLink 1022 - Disclosure - Derivatives, Hedges, Financial Instruments and Carbon Credits link:calculationLink link:presentationLink link:definitionLink 1023 - Disclosure - Stockholders' Equity link:calculationLink link:presentationLink link:definitionLink 1024 - Disclosure - Non-Redeemable Preferred Stock link:calculationLink link:presentationLink link:definitionLink 1025 - Disclosure - Executive Benefit Agreements and Employee Savings Plans link:calculationLink link:presentationLink link:definitionLink 1026 - Disclosure - Property and Business Interruption Insurance Claims and Recovery link:calculationLink link:presentationLink link:definitionLink 1027 - Disclosure - Other Expense, Other Income and Non-Operating Other Income, net link:calculationLink link:presentationLink link:definitionLink 1028 - Disclosure - Segment Information link:calculationLink link:presentationLink link:definitionLink 1029 - Disclosure - Related Party Transactions link:calculationLink link:presentationLink link:definitionLink 1030 - Disclosure - Subsequent Events link:calculationLink link:presentationLink link:definitionLink 1031 - Disclosure - Quarterly Financial Data link:calculationLink link:presentationLink link:definitionLink 1032 - Disclosure - Condensed Financial Information of Registrant link:calculationLink link:presentationLink link:definitionLink 1033 - Disclosure - Valuation and Qualifying Accounts link:calculationLink link:presentationLink link:definitionLink 1034 - Disclosure - Summary of Significant Accounting Policies (Policies) link:calculationLink link:presentationLink link:definitionLink 1035 - Disclosure - Summary of Significant Accounting Policies (Tables) link:calculationLink link:presentationLink link:definitionLink 1036 - Disclosure - Acquisition of Working Interests in Natural Gas Properties (Tables) link:calculationLink link:presentationLink link:definitionLink 1037 - Disclosure - Income Per Common Share (Tables) link:calculationLink link:presentationLink link:definitionLink 1038 - Disclosure - Accounts Receivable, net (Tables) link:calculationLink link:presentationLink link:definitionLink 1039 - Disclosure - Inventories (Tables) link:calculationLink link:presentationLink link:definitionLink 1040 - Disclosure - Property, Plant and Equipment (Tables) link:calculationLink link:presentationLink link:definitionLink 1041 - Disclosure - Current and Noncurrent Accrued and Other Liabilities (Tables) link:calculationLink link:presentationLink link:definitionLink 1042 - Disclosure - Accrued Warranty Costs (Tables) link:calculationLink link:presentationLink link:definitionLink 1043 - Disclosure - Long-Term Debt (Tables) link:calculationLink link:presentationLink link:definitionLink 1044 - Disclosure - Income Taxes (Tables) link:calculationLink link:presentationLink link:definitionLink 1045 - Disclosure - Commitments and Contingencies (Tables) link:calculationLink link:presentationLink link:definitionLink 1046 - Disclosure - Derivatives, Hedges, Financial Instruments and Carbon Credits (Tables) link:calculationLink link:presentationLink link:definitionLink 1047 - Disclosure - Stockholders' Equity (Tables) link:calculationLink link:presentationLink link:definitionLink 1048 - Disclosure - Executive Benefit Agreements and Employee Savings Plans (Tables) link:calculationLink link:presentationLink link:definitionLink 1049 - Disclosure - Other Expense, Other Income and Non-Operating Other Income, net (Tables) link:calculationLink link:presentationLink link:definitionLink 1050 - Disclosure - Segment Information (Tables) link:calculationLink link:presentationLink link:definitionLink 1051 - Disclosure - Quarterly Financial Data (Tables) link:calculationLink link:presentationLink link:definitionLink 1052 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1053 - Disclosure - Summary of Significant Accounting Policies - Goodwill Relates to Business Acquisitions (Detail) link:calculationLink link:presentationLink link:definitionLink 1054 - Disclosure - Summary of Significant Accounting Policies - Shipping and Handling Costs Included in Net Sales and Selling, General and Administrative Expense (Detail) link:calculationLink link:presentationLink link:definitionLink 1055 - Disclosure - Summary of Significant Accounting Policies - Advertising and Promotion of Products (Detail) link:calculationLink link:presentationLink link:definitionLink 1056 - Disclosure - Acquisition of Working Interests in Natural Gas Properties - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1057 - Disclosure - Acquisition of Working Interests in Natural Gas Properties - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed at Acquisition Date (Detail) link:calculationLink link:presentationLink link:definitionLink 1058 - Disclosure - Acquisition of Working Interests in Natural Gas Properties - Summary of Unaudited Pro forma Information During Period of Acquisition (Detail) link:calculationLink link:presentationLink link:definitionLink 1059 - Disclosure - Income Per Common Share - Computation of Basic and Diluted Net Income Per Share (Detail) link:calculationLink link:presentationLink link:definitionLink 1060 - Disclosure - Income Per Common Share - Antidilutive Securities Excluded from Computation of Earning Per Share (Detail) link:calculationLink link:presentationLink link:definitionLink 1061 - Disclosure - Accounts Receivable, net - Net Accounts Receivable (Detail) link:calculationLink link:presentationLink link:definitionLink 1062 - Disclosure - Accounts Receivable, net - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1063 - Disclosure - Inventories - Schedule of Inventories (Detail) link:calculationLink link:presentationLink link:definitionLink 1064 - Disclosure - Inventories - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1065 - Disclosure - Inventories - Changes in Inventory Reserves (Detail) link:calculationLink link:presentationLink link:definitionLink 1066 - Disclosure - Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) link:calculationLink link:presentationLink link:definitionLink 1067 - Disclosure - Property, Plant and Equipment - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1068 - Disclosure - Current and Noncurrent Accrued and Other Liabilities - Summary of Current and Noncurrent Accrued and Other Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 1069 - Disclosure - Accrued Warranty Costs - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1070 - Disclosure - Accrued Warranty Costs - Changes in Product Warranty Obligation (Detail) link:calculationLink link:presentationLink link:definitionLink 1071 - Disclosure - Asset Retirement Obligations - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1072 - Disclosure - Long-Term Debt - Schedule of Long-Term Debt (Detail) link:calculationLink link:presentationLink link:definitionLink 1073 - Disclosure - Long-Term Debt - Schedule of Long-Term Debt (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 1074 - Disclosure - Long-Term Debt - Stated Interest Rate on Secured Term Loan (Detail) link:calculationLink link:presentationLink link:definitionLink 1075 - Disclosure - Long-Term Debt - Maturities of Long-Term Debt (Detail) link:calculationLink link:presentationLink link:definitionLink 1076 - Disclosure - Long-Term Debt - Summary of Acquisition Transactions (Detail) link:calculationLink link:presentationLink link:definitionLink 1077 - Disclosure - Income Taxes - Summary of Provisions for Income Taxes (Detail) link:calculationLink link:presentationLink link:definitionLink 1078 - Disclosure - Income Taxes - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1079 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) link:calculationLink link:presentationLink link:definitionLink 1080 - Disclosure - Income Taxes - Income from Continuing Operations Before Provision for Income Taxes (Detail) link:calculationLink link:presentationLink link:definitionLink 1081 - Disclosure - Income Taxes - Reconciliation of Beginning and Ending Amount of Uncertain Tax Positions (Detail) link:calculationLink link:presentationLink link:definitionLink 1082 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Payments on Leases (Detail) link:calculationLink link:presentationLink link:definitionLink 1083 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1084 - Disclosure - Derivatives, Hedges, Financial Instruments and Carbon Credits - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1085 - Disclosure - Derivatives, Hedges, Financial Instruments and Carbon Credits - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) link:calculationLink link:presentationLink link:definitionLink 1086 - Disclosure - Derivatives, Hedges, Financial Instruments and Carbon Credits - Reconciliation of Beginning and Ending Balances for Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) link:calculationLink link:presentationLink link:definitionLink 1087 - Disclosure - Derivatives, Hedges, Financial Instruments and Carbon Credits - Realized and Unrealized Net Losses Included in Earnings and Income Statement (Detail) link:calculationLink link:presentationLink link:definitionLink 1088 - Disclosure - Stockholders' Equity - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1089 - Disclosure - Stockholders' Equity - Valuation Assumptions of Granted Stock Options (Detail) link:calculationLink link:presentationLink link:definitionLink 1090 - Disclosure - Stockholders' Equity - Stock Option Activities of Stock Option Plans (Detail) link:calculationLink link:presentationLink link:definitionLink 1091 - Disclosure - Stockholders' Equity - Stock Options Outstanding and Exercisable (Detail) link:calculationLink link:presentationLink link:definitionLink 1092 - Disclosure - Non-Redeemable Preferred Stock - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1093 - Disclosure - Executive Benefit Agreements and Employee Savings Plans - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1094 - Disclosure - Executive Benefit Agreements and Employee Savings Plans - Executive Benefit Agreements (Detail) link:calculationLink link:presentationLink link:definitionLink 1095 - Disclosure - Executive Benefit Agreements and Employee Savings Plans - Executive Benefit Expenses (Detail) link:calculationLink link:presentationLink link:definitionLink 1096 - Disclosure - Executive Benefit Agreements and Employee Savings Plans - Life Insurance Policies (Detail) link:calculationLink link:presentationLink link:definitionLink 1097 - Disclosure - Executive Benefit Agreements and Employee Savings Plans - Life Insurance Premiums (Detail) link:calculationLink link:presentationLink link:definitionLink 1098 - Disclosure - Executive Benefit Agreements and Employee Savings Plans - Life Insurance Policies (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 1099 - Disclosure - Property and Business Interruption Insurance Claims and Recovery - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1100 - Disclosure - Other Expense, Other Income and Non-Operating Other Income, net - Schedule of Other Expense, Other Income and Non-Operating Other Income, net (Detail) link:calculationLink link:presentationLink link:definitionLink 1101 - Disclosure - Segment Information - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1102 - Disclosure - Segment Information - Segment Financial Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1103 - Disclosure - Segment Information - General Corporate Expenses and Other Business Operations, Net (Detail) link:calculationLink link:presentationLink link:definitionLink 1104 - Disclosure - Segment Information - PP&E and Total Assets by Business Segment (Detail) link:calculationLink link:presentationLink link:definitionLink 1105 - Disclosure - Segment Information - Net Sales to Foreign Customers (Detail) link:calculationLink link:presentationLink link:definitionLink 1106 - Disclosure - Related Party Transactions - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1107 - Disclosure - Subsequent Events - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1108 - Disclosure - Quarterly Financial Data - Schedule of Quarterly Financial Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1109 - Disclosure - Quarterly Financial Data - Schedule of Quarterly Financial Information (Parenthetical) (Detail) link:calculationLink link:presentationLink link:definitionLink 1110 - Schedule - Schedule I - Condensed Financial Information of Registrant - Condensed Balance Sheets (Detail) link:calculationLink link:presentationLink link:definitionLink 1111 - Schedule - Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Income (Detail) link:calculationLink link:presentationLink link:definitionLink 1112 - Schedule - Schedule I - Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Detail) link:calculationLink link:presentationLink link:definitionLink 1113 - Schedule - Schedule I - Condensed Financial Information of Registrant - Schedule of Long-term Debt Outstanding (Detail) link:calculationLink link:presentationLink link:definitionLink 1114 - Schedule - Schedule I - Condensed Financial Information of Registrant - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 1115 - Schedule - Schedule I - Condensed Financial Information of Registrant - Summary of Transactions Related to Debentures (Detail) link:calculationLink link:presentationLink link:definitionLink 1116 - Schedule - Schedule II - Valuation and Qualifying Accounts (Detail) link:calculationLink link:presentationLink link:definitionLink