00100 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Consolidated Statements Of Income link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - Consolidated Statements Of Cash Flows link:presentationLink link:calculationLink link:definitionLink 40103 - Disclosure - Significant Accounting Policies (Reconciliation Of The Average Number Of Common Shares Outstanding To Average Number Of Diluted Shares Outstanding) (Details) link:presentationLink link:calculationLink link:definitionLink 40302 - Disclosure - Comprehensive Income (Components Of Comprehensive Income) (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - Investments (Available-For-Sale Investments) (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - Investments (Schedule Of Unrealized Loss On Investments) (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - Income Taxes (Schedule Of Provisions For Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 40503 - Disclosure - Income Taxes (Schedule Of Deferred Tax Assets And Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 40504 - Disclosure - Income Taxes (Schedule Of Income Taxes Calculated On Income Before Income Taxes And Provision For Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Operating Property (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - Debt (Schedule Of Long-Term Debt) (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - Debt (Schedule Of Long-Term Debt) (Details) (Alternative) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Leases (Minimum Lease Payments) (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Leases (Minimum Lease Payments) (Details) (Alternative) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - Share-Based Payment Arrangements (Amounts Recognized In The Financial Statements With Respect To The Plans) (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00400 - Statement - Consolidated Statements Of Changes In Equity link:presentationLink link:calculationLink link:definitionLink 00405 - Statement - Consolidated Statements Of Changes In Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Noncontrolling Interest link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Operating Property link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Retirement Plan link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Debt link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Share-Based Payment Arrangements link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Equity link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Commitments And Contingencies link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - Quarterly Financial Data link:presentationLink link:calculationLink link:definitionLink 20102 - Disclosure - Significant Accounting Policies (Policy) link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - Operating Property (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - Share-Based Payment Arrangements (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 31403 - Disclosure - Quarterly Financial Data (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - Significant Accounting Policies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40102 - Disclosure - Significant Accounting Policies (Summary Of Activity In The Allowance For Doubtful Accounts) (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - Noncontrolling Interest (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Comprehensive Income (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Investments (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40505 - Disclosure - Income Taxes (Schedule For Gross Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Retirement Plan (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Share-Based Payment Arrangements (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - Share-Based Payment Arrangements (Weighted Average Assumptions For Option Grants) (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - Share-Based Payment Arrangements (Summary Of Information Regarding Stock Options) (Details) link:presentationLink link:calculationLink link:definitionLink 41005 - Disclosure - Share-Based Payment Arrangements (Summary Of Stock Options Outstanding And Exercisable) (Details) link:presentationLink link:calculationLink link:definitionLink 41006 - Disclosure - Share-Based Payment Arrangements (Schedule Of Information On Non-Vested Restricted Stock) (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Equity (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Commitments And Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Segment Information (Information Regarding Reportable Business Segments) (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Quarterly Financial Data (Details) link:presentationLink link:calculationLink link:definitionLink