00100 - Statement - Condensed Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 00200 - Statement - Condensed Consolidated Statements Of Operations link:presentationLink link:calculationLink link:definitionLink 00300 - Statement - Condensed Consolidated Statement Of Cash Flows link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Business Acquisition (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Investments (Schedule Of Debt Securities By Contractual Maturity Date) (Details) link:presentationLink link:calculationLink link:definitionLink 40402 - Disclosure - Investments (Schedule Of Available-For-Sale And Trading Securities) (Details) link:presentationLink link:calculationLink link:definitionLink 40604 - Disclosure - Goodwill And Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Earnings Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Comprehensive Income (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Geographic Information (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00105 - Statement - Condensed Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00205 - Statement - Condensed Consolidated Statements Of Operations (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Basis Of Presentation link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Recent Accounting Pronouncements link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Business Acquisition link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 10501 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 10601 - Disclosure - Goodwill And Intangible Assets link:presentationLink link:calculationLink link:definitionLink 10701 - Disclosure - Commitments And Contingencies link:presentationLink link:calculationLink link:definitionLink 10801 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 10901 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 11001 - Disclosure - Stock Options And Employee Stock Purchase Plan link:presentationLink link:calculationLink link:definitionLink 11101 - Disclosure - Earnings Per Share link:presentationLink link:calculationLink link:definitionLink 11201 - Disclosure - Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 11301 - Disclosure - Geographic Information link:presentationLink link:calculationLink link:definitionLink 11401 - Disclosure - Subsequent Events link:presentationLink link:calculationLink link:definitionLink 20102 - Disclosure - Basis Of Presentation (Policy) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Business Acquisition (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - Goodwill And Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 31003 - Disclosure - Stock Options And Employee Stock Purchase Plan (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - Earnings Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Comprehensive Income (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - Geographic Information (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - Basis Of Presentation (Details) link:presentationLink link:calculationLink link:definitionLink 40403 - Disclosure - Investments (Summary Of Gross Unrealized Gains And Losses And Fair Values) (Details) link:presentationLink link:calculationLink link:definitionLink 40501 - Disclosure - Fair Value Measurements (Schedule Of Fair Values Of Financial Instruments Measured On Recurring Basis) (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - Fair Value Measurements (Schedule Of Changes In Fair Value Of Level 3 Financial Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 40601 - Disclosure - Goodwill And Intangible Assets (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40602 - Disclosure - Goodwill And Intangible Assets (Changes In Carrying Amounts Of Goodwill And Other Intangible Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 40603 - Disclosure - Goodwill And Intangible Assets (Indefinite Intangible Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Commitments And Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Stockholders' Equity (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Stock Options And Employee Stock Purchase Plan (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41002 - Disclosure - Stock Options And Employee Stock Purchase Plan (Stock Options) (Details) link:presentationLink link:calculationLink link:definitionLink 41003 - Disclosure - Stock Options And Employee Stock Purchase Plan (Assumptions To Estimate Fair Value Of Stock Options) (Details) link:presentationLink link:calculationLink link:definitionLink 41004 - Disclosure - Stock Options And Employee Stock Purchase Plan (Restricted Stock) (Details) link:presentationLink link:calculationLink link:definitionLink 41005 - Disclosure - Stock Options And Employee Stock Purchase Plan (Allocation Of Share-Based Compensation Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Subsequent Events (Details) link:presentationLink link:calculationLink link:definitionLink