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Disclosure - Business and Summary of Significant Accounting Policies link:presentationLink link:calculationLink link:definitionLink 220022001 - Disclosure - Business and Summary of Significant Accounting Policies (Policies) link:presentationLink link:calculationLink link:definitionLink 240034001 - Disclosure - Business and Summary of Significant Accounting Policies (Details) link:presentationLink link:calculationLink link:definitionLink 210041002 - Disclosure - Investments in Marketable Securities link:presentationLink link:calculationLink link:definitionLink 230053001 - Disclosure - Investments in Marketable Securities (Tables) link:presentationLink link:calculationLink link:definitionLink 240064002 - Disclosure - Investments in Marketable Securities - Summary of the Cost, Gross Unrealized Gains and Losses, and Fair Value of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 240074003 - Disclosure - Investments in Marketable Securities - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 210081003 - Disclosure - Other Investments link:presentationLink link:calculationLink link:definitionLink 230093002 - Disclosure - Other Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 240104004 - Disclosure - Other Investments (Details) link:presentationLink link:calculationLink link:definitionLink 210111004 - Disclosure - Fair Value Measurements link:presentationLink link:calculationLink link:definitionLink 230123003 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 240134005 - Disclosure - Fair Value Measurements - Fair Value of Financial Assets and Liabilities Measured on a Recurring Basis (Details) link:presentationLink link:calculationLink link:definitionLink 240144006 - Disclosure - Fair Value Measurements - Changes in Level 3 Financial Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 240154007 - Disclosure - Fair Value Measurements - Quantitative Information About Level 3 (Details) link:presentationLink link:calculationLink link:definitionLink 240164008 - 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Equity Method Investments in Affiliates - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 240434024 - Disclosure - Equity Method Investments in Affiliates - Financial Information for Affiliates Accounted for Under the Equity Method (Details) link:presentationLink link:calculationLink link:definitionLink 210441011 - Disclosure - Lease Commitments link:presentationLink link:calculationLink link:definitionLink 230453009 - Disclosure - Lease Commitments (Tables) link:presentationLink link:calculationLink link:definitionLink 240464025 - Disclosure - Lease Commitments - Additional Information (Details) link:presentationLink link:calculationLink link:definitionLink 240474026 - Disclosure - Lease Commitments - Total Lease Costs (Net) (Details) link:presentationLink link:calculationLink link:definitionLink 240484027 - Disclosure - Lease Commitments - Maturity of Lease Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 210491012 - Disclosure - Fixed Assets link:presentationLink link:calculationLink link:definitionLink 230503010 - Disclosure - Fixed Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 240514028 - Disclosure - Fixed Assets (Details) link:presentationLink link:calculationLink link:definitionLink 210521013 - Disclosure - Payables and Accrued Liabilities link:presentationLink link:calculationLink link:definitionLink 230533011 - Disclosure - Payables and Accrued Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 240544029 - Disclosure - Payables and Accrued Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 210551014 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 240564030 - Disclosure - Related Party Transactions (Details) link:presentationLink link:calculationLink link:definitionLink 210571015 - Disclosure - Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 230583012 - 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Disclosure - Schedule II Valuation and Qualifying Accounts link:presentationLink link:calculationLink link:definitionLink 241024058 - Disclosure - Schedule II Valuation and Qualifying Accounts (Details) link:presentationLink link:calculationLink link:definitionLink