0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 9952151 - Statement - Consolidated Balance Sheets link:presentationLink link:calculationLink link:definitionLink 9952152 - Statement - Consolidated Balance Sheets (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952153 - Statement - Consolidated Statements of Operations link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952157 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952158 - Disclosure - Basis of Presentation link:presentationLink link:calculationLink link:definitionLink 9952159 - Disclosure - Recent Accounting Pronouncements link:presentationLink link:calculationLink link:definitionLink 9952160 - Disclosure - Revenue from Contracts with Customers link:presentationLink link:calculationLink link:definitionLink 9952161 - Disclosure - Acquisitions link:presentationLink link:calculationLink link:definitionLink 9952162 - Disclosure - Property and Equipment, Net link:presentationLink link:calculationLink link:definitionLink 9952163 - Disclosure - Goodwill and Other Intangible Assets link:presentationLink link:calculationLink link:definitionLink 9952164 - Disclosure - Investments link:presentationLink link:calculationLink link:definitionLink 9952165 - Disclosure - Leases link:presentationLink link:calculationLink link:definitionLink 9952166 - Disclosure - Accruals and Other Current Liabilities link:presentationLink link:calculationLink link:definitionLink 9952167 - Disclosure - Long‑Term Debt link:presentationLink link:calculationLink link:definitionLink 9952168 - Disclosure - Executive Incentive Plans link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Retirement Plans link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Common Stock link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Accumulated Other Comprehensive Loss link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Stock-Based Compensation link:presentationLink link:calculationLink link:definitionLink 9952173 - Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952174 - Disclosure - Fair Value of Financial Instruments link:presentationLink link:calculationLink link:definitionLink 9952175 - Disclosure - Commitments and Contingencies link:presentationLink link:calculationLink link:definitionLink 9952176 - Disclosure - Geographic Data link:presentationLink link:calculationLink link:definitionLink 9952177 - Disclosure - Other Income, Net link:presentationLink link:calculationLink link:definitionLink 9952178 - Disclosure - Realignment Costs link:presentationLink link:calculationLink link:definitionLink 9952179 - Disclosure - Net Income Per Share link:presentationLink link:calculationLink link:definitionLink 9954471 - Disclosure - Basis of Presentation (Policies) link:presentationLink link:calculationLink link:definitionLink 9954472 - Disclosure - Revenue from Contracts with Customers (Tables) link:presentationLink link:calculationLink link:definitionLink 9954473 - Disclosure - Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 9954474 - Disclosure - Property and Equipment, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9954475 - Disclosure - Goodwill and Other Intangible Assets (Tables) link:presentationLink link:calculationLink link:definitionLink 9954476 - Disclosure - Investments (Tables) link:presentationLink link:calculationLink link:definitionLink 9954477 - Disclosure - Leases (Tables) link:presentationLink link:calculationLink link:definitionLink 9954478 - Disclosure - Accruals and Other Current Liabilities (Tables) link:presentationLink link:calculationLink link:definitionLink 9954479 - Disclosure - Long‑Term Debt (Tables) link:presentationLink link:calculationLink link:definitionLink 9954480 - Disclosure - Retirement Plans (Tables) link:presentationLink link:calculationLink link:definitionLink 9954481 - Disclosure - Common Stock (Tables) link:presentationLink link:calculationLink link:definitionLink 9954482 - Disclosure - Accumulated Other Comprehensive Loss (Tables) link:presentationLink link:calculationLink link:definitionLink 9954483 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9954484 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9954485 - Disclosure - Fair Value of Financial Instruments (Tables) link:presentationLink link:calculationLink link:definitionLink 9954486 - Disclosure - Geographic Data (Tables) link:presentationLink link:calculationLink link:definitionLink 9954487 - Disclosure - Other Income, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9954488 - Disclosure - Realignment Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9954489 - Disclosure - Net Income Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9954490 - Disclosure - Revenue from Contracts with Customers - Schedule of Revenue Disaggregation by Type (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Revenue from Contracts with Customers - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954491 - Disclosure - Revenue from Contracts with Customers - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954492 - Disclosure - Revenue from Contracts with Customers - Schedule of Revenue Disaggregation by Location (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Revenue from Contracts with Customers - Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9954493 - Disclosure - Revenue from Contracts with Customers - Performance Obligation (Details) link:presentationLink link:calculationLink link:definitionLink 9954494 - Disclosure - Acquisitions - Schedule of Business Acquisitions Aggregate Details (Details) link:presentationLink link:calculationLink link:definitionLink 9954495 - Disclosure - Acquisitions - Schedule of Contingent and Non-Contingent Consideration Fair Value (Details) link:presentationLink link:calculationLink link:definitionLink 9954496 - Disclosure - Acquisitions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954497 - Disclosure - Acquisitions - Schedule of Recognized Identified Assets Acquired and Liabilities Assumed (Details) link:presentationLink link:calculationLink link:definitionLink 9954498 - Disclosure - Property and Equipment, Net - Schedule of Property and Equipment, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9954499 - Disclosure - Property and Equipment, Net - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954500 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Changes in the Carrying Amount of Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9954501 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Intangible Assets Other than Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9954502 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Finite-lived Intangible Assets Amortization Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954503 - Disclosure - Investments - Schedule of Investments (Details) link:presentationLink link:calculationLink link:definitionLink 9954504 - Disclosure - Investments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954505 - Disclosure - Leases - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954506 - Disclosure - Leases - Schedule of Lease Cost (Details) link:presentationLink link:calculationLink link:definitionLink 9954507 - Disclosure - Leases - Schedule of Other Information (Details) link:presentationLink link:calculationLink link:definitionLink 9954508 - Disclosure - Accruals and Other Current Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - Long‑Term Debt - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954509 - Disclosure - Long‑Term Debt - Schedule of Long-Term Debt (Details) link:presentationLink link:calculationLink link:definitionLink 9954510 - Disclosure - Long‑Term Debt - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954511 - Disclosure - Long‑Term Debt - Schedule of Interest Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954512 - Disclosure - Executive Incentive Plans (Details) link:presentationLink link:calculationLink link:definitionLink 9954513 - Disclosure - Retirement Plans - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954514 - Disclosure - Retirement Plans - Schedule of Deferred Compensation Plan Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954515 - Disclosure - Common Stock - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954516 - Disclosure - Common Stock - Schedule of Dividends (Details) link:presentationLink link:calculationLink link:definitionLink 9954517 - Disclosure - Accumulated Other Comprehensive Loss (Details) link:presentationLink link:calculationLink link:definitionLink 9954518 - Disclosure - Stock-Based Compensation - Summary of Stock-Based Compensation Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9954519 - Disclosure - Stock-Based Compensation - 2020 Omnibus Incentive Plan Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954520 - Disclosure - Stock-Based Compensation - Restricted Stock and Restricted Stock Units Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954521 - Disclosure - Stock-Based Compensation - Restricted Stock and RSUs Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9954522 - Disclosure - Stock-Based Compensation - Options Outstanding Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9954523 - Disclosure - Stock-Based Compensation - Stock Options Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954524 - Disclosure - Stock-Based Compensation - Stock Grants Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954525 - Disclosure - Income Taxes - Schedule of Components of Income Tax (Details) link:presentationLink link:calculationLink link:definitionLink 9954526 - Disclosure - Income Taxes - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954527 - Disclosure - Fair Value of Financial Instruments - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954528 - Disclosure - Fair Value of Financial Instruments - Fair Value of Financial Assets and Liabilities (Details) link:presentationLink link:calculationLink link:definitionLink 9954529 - Disclosure - Commitments and Contingencies (Details) link:presentationLink link:calculationLink link:definitionLink 9954530 - Disclosure - Geographic Data (Details) link:presentationLink link:calculationLink link:definitionLink 9954531 - Disclosure - Other Income, Net (Details) link:presentationLink link:calculationLink link:definitionLink 9954532 - Disclosure - Realignment Costs - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954533 - Disclosure - Realignment Costs - Schedule of Realignment Costs (Details) link:presentationLink link:calculationLink link:definitionLink 9954534 - Disclosure - Realignment Costs - Realignment Activities Rollforward (Details) link:presentationLink link:calculationLink link:definitionLink 9954535 - Disclosure - Net Income Per Share - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9954536 - Disclosure - Net Income Per Share - Schedule of Basic and Diluted Net Income Per Share (Details) link:presentationLink link:calculationLink link:definitionLink