0000 - Document - Document and Entity Information link:presentationLink link:calculationLink link:definitionLink 0010 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS link:presentationLink link:calculationLink link:definitionLink 0020 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS link:presentationLink link:calculationLink link:definitionLink 0021 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS Percentage link:presentationLink link:calculationLink link:definitionLink 0030 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME link:presentationLink link:calculationLink link:definitionLink 0035 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 0040 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS link:presentationLink link:calculationLink link:definitionLink 1010 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 1020 - Disclosure - Organization link:presentationLink link:calculationLink link:definitionLink 1030 - Disclosure - Accounting Policies link:presentationLink link:calculationLink link:definitionLink 1040 - Disclosure - Business Segments link:presentationLink link:calculationLink link:definitionLink 1050 - Disclosure - Income Per Share of Common Stock link:presentationLink link:calculationLink link:definitionLink 1060 - Disclosure - Accumulated Other Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 1070 - Disclosure - Inventories link:presentationLink link:calculationLink link:definitionLink 1080 - Disclosure - Banking Facilities and Debt link:presentationLink link:calculationLink link:definitionLink 1090 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 2030 - Disclosure - Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 3030 - Disclosure - Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 3040 - Disclosure - Business Segments (Tables) link:presentationLink link:calculationLink link:definitionLink 3050 - Disclosure - Income Per Share of Common Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 3060 - Disclosure - Accumulated Other Comprehensive Loss (Tables) link:presentationLink link:calculationLink link:definitionLink 3070 - Disclosure - Inventories (Tables) link:presentationLink link:calculationLink link:definitionLink 3080 - Disclosure - Banking Facilities and Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 4020 - Disclosure - Organization (Details) link:presentationLink link:calculationLink link:definitionLink 4030 - Disclosure - Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 4040 - Disclosure - Business Segments (Details) link:presentationLink link:calculationLink link:definitionLink 4050 - Disclosure - Income Per Share of Common Stock (Details) link:presentationLink link:calculationLink link:definitionLink 4060 - Disclosure - Accumulated Other Comprehensive Loss (Details) link:presentationLink link:calculationLink link:definitionLink 4070 - Disclosure - Inventories (Details) link:presentationLink link:calculationLink link:definitionLink 4080 - Disclosure - Banking Facilities and Debt (Details) link:presentationLink link:calculationLink link:definitionLink 4090 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 8000 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 8010 - Statement - Consolidated Statements of Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 8020 - Statement - Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 8030 - Statement - Consolidated Statements of Stockholders' Equity (Calc 2) link:presentationLink link:calculationLink link:definitionLink 8040 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 8050 - Disclosure - Banking Facilities (Tables) link:presentationLink link:calculationLink link:definitionLink 8060 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 8070 - Disclosure - Banking Facilities (Details) link:presentationLink link:calculationLink link:definitionLink 8080 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 8090 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 8100 - Disclosure - Employee Retirement Plans link:presentationLink link:calculationLink link:definitionLink 8110 - Disclosure - Employee Retirement Plans (Details) link:presentationLink link:calculationLink link:definitionLink 8120 - Disclosure - Employee Retirement Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 8130 - Disclosure - New Accounting Pronouncements link:presentationLink link:calculationLink link:definitionLink 8140 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 8150 - Disclosure - Stock-Based Compensation (Details) link:presentationLink link:calculationLink link:definitionLink 8160 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 8170 - Disclosure - Summary of Quarterly Financial Data (unaudited) link:presentationLink link:calculationLink link:definitionLink 8180 - Disclosure - Summary of Quarterly Financial Data (unaudited) (Details) link:presentationLink link:calculationLink link:definitionLink 8190 - Disclosure - Summary of Quarterly Financial Data (unaudited) (Tables) link:presentationLink link:calculationLink link:definitionLink 8200 - Disclosure - Summary of Significant Accounting Policies (Details 2) link:presentationLink link:calculationLink link:definitionLink 8210 - Disclosure - Summary of Significant Accounting Policies (Details 3) link:presentationLink link:calculationLink link:definitionLink 8220 - Disclosure - Supplementary Financial Information for Oil and Gas Producing Activities link:presentationLink link:calculationLink link:definitionLink 8230 - Disclosure - Supplementary Financial Information for Oil and Gas Producing Activities (Details) link:presentationLink link:calculationLink link:definitionLink 8240 - Disclosure - Supplementary Financial Information for Oil and Gas Producing Activities (Tables) link:presentationLink link:calculationLink link:definitionLink 8250 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 8260 - Disclosure - Income Taxes (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink 8270 - Disclosure - Banking Facilities and Other Debt (Details) (Calc 2) link:presentationLink link:calculationLink link:definitionLink