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Disclosure - Fixed Assets (Details) link:presentationLink link:calculationLink link:definitionLink 40701 - Disclosure - Accrued Expenses And Other Liabilities (Schedule Of Accrued Expenses And Other Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 40802 - Disclosure - Long-Term Debt (Schedule Of Long-Term Debt Instruments) (Details) link:presentationLink link:calculationLink link:definitionLink 40902 - Disclosure - Income Taxes (Schedule Of Components Of The Provision (Benefit) For Income Taxes) (Details) link:presentationLink link:calculationLink link:definitionLink 40904 - Disclosure - Income Taxes (Current Deferred Tax Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 40905 - Disclosure - Income Taxes (Non-Current Deferred Tax Liabilities And Assets) (Details) link:presentationLink link:calculationLink link:definitionLink 41301 - Disclosure - Commitments And Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 41603 - Disclosure - Subsequent Event (Estimated Fair Values Of The Aggregate Assets And Liabilities Acquired) (Details) link:presentationLink link:calculationLink link:definitionLink 00090 - Document - Document And Entity Information link:presentationLink link:calculationLink link:definitionLink 00205 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 00305 - Statement - Consolidated Statements Of Shareholders' Equity (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 10101 - Disclosure - Summary Of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 10201 - Disclosure - Business Combinations link:presentationLink link:calculationLink link:definitionLink 10301 - Disclosure - Goodwill link:presentationLink link:calculationLink link:definitionLink 10401 - Disclosure - Amortizable Intangible Assets link:presentationLink link:calculationLink link:definitionLink 10501 - 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Disclosure - Segment Information link:presentationLink link:calculationLink link:definitionLink 11601 - Disclosure - Subsequent Event link:presentationLink link:calculationLink link:definitionLink 20102 - Disclosure - Summary Of Significant Accounting Policies (Policy) link:presentationLink link:calculationLink link:definitionLink 30103 - Disclosure - Summary Of Significant Accounting Policies (Tables) link:presentationLink link:calculationLink link:definitionLink 30203 - Disclosure - Business Combinations (Tables) link:presentationLink link:calculationLink link:definitionLink 30303 - Disclosure - Goodwill (Tables) link:presentationLink link:calculationLink link:definitionLink 30403 - Disclosure - Amortizable Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 30503 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 30603 - Disclosure - Fixed Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 30703 - Disclosure - Accrued Expenses And Other Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 30803 - Disclosure - Long-Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 30903 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 31103 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 31203 - Disclosure - Supplemental Disclosures Of Cash Flow Information (Tables) link:presentationLink link:calculationLink link:definitionLink 31303 - Disclosure - Commitments And Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 31403 - Disclosure - Quarterly Operating Results (Tables) link:presentationLink link:calculationLink link:definitionLink 31503 - Disclosure - Segment Information (Tables) link:presentationLink link:calculationLink link:definitionLink 31603 - Disclosure - Subsequent Event (Tables) link:presentationLink link:calculationLink link:definitionLink 40101 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40201 - Disclosure - Business Combinations (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40202 - Disclosure - Business Combinations (Acquisitions Accounted For As Business Combinations) (Details) link:presentationLink link:calculationLink link:definitionLink 40203 - Disclosure - Business Combinations (Estimated Fair Values Of The Aggregate Assets And Liabilities Acquired) (Details) link:presentationLink link:calculationLink link:definitionLink 40204 - Disclosure - Business Combinations (Results Of Operations) (Details) link:presentationLink link:calculationLink link:definitionLink 40205 - Disclosure - Business Combinations (Estimated Acquisition Earn-Out Payables) (Details) link:presentationLink link:calculationLink link:definitionLink 40301 - Disclosure - Goodwill (Schedule Of Goodwill) (Details) link:presentationLink link:calculationLink link:definitionLink 40401 - Disclosure - Amortizable Intangible Assets (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40502 - Disclosure - Investments (Schedule Of Available-For-Sale Securities) (Details) link:presentationLink link:calculationLink link:definitionLink 40503 - Disclosure - Investments (Schedule Of Proceeds And Realized Gains/(Losses) On Equity Securities And Certificates Of Deposit) (Details) link:presentationLink link:calculationLink link:definitionLink 40801 - Disclosure - Long-Term Debt (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40901 - Disclosure - Income Taxes (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 40903 - Disclosure - Income Taxes (Schedule Of Reconciliation Of The Differences Between The Effective Tax Rate And The Federal Statutory Tax Rate) (Details) link:presentationLink link:calculationLink link:definitionLink 40906 - Disclosure - Income Taxes (Schedule Of Reconciliation Of The Beginning And Ending Amount Of Unrecognized Tax Benefits) (Details) link:presentationLink link:calculationLink link:definitionLink 41001 - Disclosure - Employee Savings Plan (Details) link:presentationLink link:calculationLink link:definitionLink 41101 - Disclosure - Stock-Based Compensation (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41102 - Disclosure - Stock-Based Compensation (Summary Of PSP Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 41103 - Disclosure - Stock-Based Compensation (Summary Of Stock Option Activity) (Details) link:presentationLink link:calculationLink link:definitionLink 41104 - Disclosure - Stock-Based Compensation (Summary Of Stock Options Outstanding And Options Exercisable) (Details) link:presentationLink link:calculationLink link:definitionLink 41105 - Disclosure - Stock-Based Compensation (Schedule Of Non-Cash Stock-Based Compensation Expense) (Details) link:presentationLink link:calculationLink link:definitionLink 41201 - Disclosure - Supplemental Disclosures Of Cash Flow Information (Schedule Of Significant Non-Cash Investing And Financing Activities) (Details) link:presentationLink link:calculationLink link:definitionLink 41401 - Disclosure - Quarterly Operating Results (Schedule Of Quarterly Operating Results) (Details) link:presentationLink link:calculationLink link:definitionLink 41501 - Disclosure - Segment Information (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41502 - Disclosure - Segment Information (Summarized Financial Information Reportable Segments) (Details) link:presentationLink link:calculationLink link:definitionLink 41601 - Disclosure - Subsequent Event (Narrative) (Details) link:presentationLink link:calculationLink link:definitionLink 41602 - Disclosure - Subsequent Event (Acquisitions Accounted For As Business Combinations) (Details) link:presentationLink link:calculationLink link:definitionLink 41604 - Disclosure - Subsequent Event (Results Of Operations) (Details) link:presentationLink link:calculationLink link:definitionLink