0000001 - Document - Cover link:presentationLink link:calculationLink link:definitionLink 0000002 - Document - Audit Information 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 Comprehensive Income link:presentationLink link:calculationLink link:definitionLink 9952154 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:presentationLink link:calculationLink link:definitionLink 9952155 - Statement - Consolidated Statements of Stockholders' Equity link:presentationLink link:calculationLink link:definitionLink 9952156 - Statement - Consolidated Statements of Cash Flows link:presentationLink link:calculationLink link:definitionLink 9952157 - Disclosure - General link:presentationLink link:calculationLink link:definitionLink 9952158 - 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Disclosure - Income Taxes link:presentationLink link:calculationLink link:definitionLink 9952169 - Disclosure - Other Income and Expense link:presentationLink link:calculationLink link:definitionLink 9952170 - Disclosure - Net Income Per Share link:presentationLink link:calculationLink link:definitionLink 9952171 - Disclosure - Retirement Savings Plan link:presentationLink link:calculationLink link:definitionLink 9952172 - Disclosure - Related Party Transactions link:presentationLink link:calculationLink link:definitionLink 9955511 - Disclosure - General (Policies) link:presentationLink link:calculationLink link:definitionLink 9955512 - Disclosure - General (Tables) link:presentationLink link:calculationLink link:definitionLink 9955513 - Disclosure - Business Acquisitions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955514 - Disclosure - Revenue (Tables) link:presentationLink link:calculationLink link:definitionLink 9955515 - Disclosure - Deferred Costs (Tables) link:presentationLink link:calculationLink link:definitionLink 9955516 - Disclosure - Fair Value Measurements (Tables) link:presentationLink link:calculationLink link:definitionLink 9955517 - Disclosure - Allowance for Credit Losses (Tables) link:presentationLink link:calculationLink link:definitionLink 9955518 - Disclosure - Property and Equipment, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955519 - Disclosure - Goodwill and Intangible Assets, Net (Tables) link:presentationLink link:calculationLink link:definitionLink 9955520 - Disclosure - Commitments and Contingencies (Tables) link:presentationLink link:calculationLink link:definitionLink 9955521 - Disclosure - Stockholders' Equity (Tables) link:presentationLink link:calculationLink link:definitionLink 9955522 - Disclosure - Stock-Based Compensation (Tables) link:presentationLink link:calculationLink link:definitionLink 9955523 - Disclosure - Income Taxes (Tables) link:presentationLink link:calculationLink link:definitionLink 9955524 - Disclosure - Other Income and Expense (Tables) link:presentationLink link:calculationLink link:definitionLink 9955525 - Disclosure - Net Income Per Share (Tables) link:presentationLink link:calculationLink link:definitionLink 9955526 - Disclosure - Retirement Contributions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955527 - Disclosure - Related Party Transactions (Tables) link:presentationLink link:calculationLink link:definitionLink 9955528 - Disclosure - General - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955529 - Disclosure - General - Summary of Estimated Useful Lives of Property and Equipment (Details) link:presentationLink link:calculationLink link:definitionLink 9955530 - Disclosure - General - Summary of Estimated Useful Lives of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955531 - Disclosure - Business Acquisitions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955532 - Disclosure - Business Acquisitions - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed at Acquisition Date (Details) link:presentationLink link:calculationLink link:definitionLink 9955533 - Disclosure - Business Acquisitions - Summary of Estimated Useful Lives for each acquired Intangible Asset (Details) link:presentationLink link:calculationLink link:definitionLink 9955534 - Disclosure - Revenue - Summary of Revenues by Revenue Stream (Details) link:presentationLink link:calculationLink link:definitionLink 9955535 - Disclosure - Revenue - Summary of Percentage of Domestic Revenue (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955536 - Disclosure - Revenue - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Revenue - Summary of Deferred Revenue Liability Relating to Set-Up Fees (Details) link:presentationLink link:calculationLink link:definitionLink 9955537 - Disclosure - Revenue - Summary of Deferred Revenue Liability Relating to Set-Up Fees (Details) link:presentationLink link:calculationLink link:definitionLink 9955538 - 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Disclosure - Goodwill and Intangible Assets, Net - Schedule of Activity in Goodwill (Details) link:presentationLink link:calculationLink link:definitionLink 9955545 - Disclosure - Goodwill and Intangible Assets, Net - Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955546 - Disclosure - Goodwill and Intangible Assets, Net - Schedule of Amortization Expense of Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955547 - Disclosure - Goodwill and Intangible Assets, Net - Estimated Future Annual Amortization Expense Related to Intangible Assets (Details) link:presentationLink link:calculationLink link:definitionLink 9955548 - Disclosure - Commitments and Contingencies - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955549 - Disclosure - Commitments and Contingencies - Components of Lease Expense (Details) link:presentationLink link:calculationLink link:definitionLink 9955550 - Disclosure - Commitments and Contingencies - Summary of Supplemental Cash Flow Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955551 - Disclosure - Commitments and Contingencies - Schedule of Supplemental Balance Sheet Information Related to Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Payments Under Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955552 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Payments Under Operating Leases (Details) link:presentationLink link:calculationLink link:definitionLink 9955553 - Disclosure - Commitments and Contingencies - Summary of Remaining Purchase Commitments (Details) link:presentationLink link:calculationLink link:definitionLink 9955554 - Disclosure - Stockholders' Equity - Share Repurchase Plan (Details) link:presentationLink link:calculationLink link:definitionLink 9955555 - 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PSU, RSU, RSA, and DSU (Details) link:presentationLink link:calculationLink link:definitionLink 9955562 - Disclosure - Stock-Based Compensation - Summary of ESPP Activity (Details) link:presentationLink link:calculationLink link:definitionLink 9955563 - Disclosure - Stock-Based Compensation - Fair Value Estimation of Common Stock, Assumptions (Details) link:presentationLink link:calculationLink link:definitionLink 9955564 - Disclosure - Income Taxes - Schedule of Provision for Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955565 - Disclosure - Income Taxes - Schedule of Percentage of Domestic Revenue and Domestic Income Before Income Taxes (Details) link:presentationLink link:calculationLink link:definitionLink 9955566 - Disclosure - Income Taxes - Schedule of Income Tax Expense Differed from Amounts Computed by applying U.S. Federal Income Tax Rate to Pretax Income (Details) link:presentationLink link:calculationLink link:definitionLink 9955567 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets (Liabilities) (Details) link:presentationLink link:calculationLink link:definitionLink 9955568 - Disclosure - Income Taxes - Schedule of Operating Loss Carryforwards (Details) link:presentationLink link:calculationLink link:definitionLink 9955569 - Disclosure - Other Income and Expense - Summary of Other Income (Expense), Net (Details) link:presentationLink link:calculationLink link:definitionLink 9955570 - Disclosure - Net Income Per Share - Components and Computation of Basic and Diluted Net Income Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955571 - Disclosure - Net Income Per Share - Schedule of Anti-dilutive Common Shares Excluded from Calculation of Diluted Net Income Per Share (Details) link:presentationLink link:calculationLink link:definitionLink 9955572 - Disclosure - Retirement Contributions - Narrative (Details) link:presentationLink link:calculationLink link:definitionLink 9955573 - 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