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Accumulated Other Comprehensive Income (Schedule Of Reclassifications out of Accumulated Other Comprehensive Income) (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 00305 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00505 - Statement - Consolidated Statements Of Cash Flows (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Current Relevant Accounting Standards link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Marketable Securities link:presentationLink link:calculationLink link:definitionLink 10401 - 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Disclosure - Cash And Cash Equivalents And Advertising Accounting Policies (Effect Of Reclassification Of Consolidated Balance Sheets) (Details) link:presentationLink link:calculationLink link:definitionLink 40703 - Disclosure - Cash And Cash Equivalents And Advertising Accounting Policies (Effect Of Reclassification Of Consolidated Statements Of Income) (Details) link:presentationLink link:calculationLink link:definitionLink 40704 - Disclosure - Cash And Cash Equivalents And Advertising Accounting Policies (Effect Of Reclassification Of Consolidated Statements Of Cash Flows) (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink