101 - Document - Document and Entity Information link:calculationLink link:presentationLink link:definitionLink 103 - Statement - Consolidated Balance Sheets link:calculationLink link:presentationLink link:definitionLink 104 - Statement - Consolidated Balance Sheets (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 105 - Statement - Consolidated Statements of Comprehensive Income link:calculationLink link:presentationLink link:definitionLink 106 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical) link:calculationLink link:presentationLink link:definitionLink 107 - Statement - Consolidated Statements of Stockholders' Equity link:calculationLink link:presentationLink link:definitionLink 108 - Statement - Consolidated Statements of Cash Flows link:calculationLink link:presentationLink link:definitionLink 109 - Disclosure - General link:calculationLink link:presentationLink link:definitionLink 110 - Disclosure - Business Acquisitions link:calculationLink link:presentationLink link:definitionLink 111 - 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Disclosure - Stock-Based Compensation (Tables) link:calculationLink link:presentationLink link:definitionLink 131 - Disclosure - Income Taxes (Tables) link:calculationLink link:presentationLink link:definitionLink 132 - Disclosure - Net Income Per Share (Tables) link:calculationLink link:presentationLink link:definitionLink 133 - Disclosure - Selected Quarterly Financial Data (Unaudited) (Tables) link:calculationLink link:presentationLink link:definitionLink 134 - Disclosure - General - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 135 - Disclosure - Business Acquisitions - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 136 - Disclosure - Business Acquisitions - Business Purchase Price (Detail) link:calculationLink link:presentationLink link:definitionLink 137 - Disclosure - Business Acquisitions - Estimated Fair Values of the Assets Acquired, Net of Cash acquired and Liabilities Assumed at the Acquisition Date (Detail) link:calculationLink link:presentationLink link:definitionLink 138 - Disclosure - Business Acquisitions - Estimated Fair Value of Purchased Intangible Assets and Estimated Useful Lives (Detail) link:calculationLink link:presentationLink link:definitionLink 139 - Disclosure - Business Acquisitions - Pro Forma Financial Information (Detail) link:calculationLink link:presentationLink link:definitionLink 140 - Disclosure - Financial Instruments - Summary of Investment in Cash Equivalents and Marketable Securities (Detail) link:calculationLink link:presentationLink link:definitionLink 141 - Disclosure - Financial Instruments - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 142 - Disclosure - Financial Instruments - Summary of Financial Assets Measured at Fair Value on a Recurring Basis (Detail) link:calculationLink link:presentationLink link:definitionLink 143 - Disclosure - Allowance for Doubtful Accounts - Schedule of Allowance for Doubtful Activity Included in Accounts Receivable Net (Detail) link:calculationLink link:presentationLink link:definitionLink 144 - Disclosure - Property and Equipment, net - Schedule of Property and Equipment, Net (Detail) link:calculationLink link:presentationLink link:definitionLink 145 - Disclosure - Property and Equipment, net - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 146 - Disclosure - Goodwill and Intangible Assets Net - Schedule of Changes in Net Carrying Amount of Goodwill (Detail) link:calculationLink link:presentationLink link:definitionLink 147 - Disclosure - Goodwill and Intangible Assets, net - Intangible Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 148 - Disclosure - Goodwill and Intangible Assets, net - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 149 - Disclosure - Goodwill and Intangible Assets, net - Future Amortization Expense for Intangible Assets (Detail) link:calculationLink link:presentationLink link:definitionLink 150 - Disclosure - Commitments and Contingencies - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 151 - Disclosure - Commitments and Contingencies - Future Minimum Payments Under Operating Leases (Detail) link:calculationLink link:presentationLink link:definitionLink 152 - Disclosure - Stockholders' Equity - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 153 - Disclosure - Stock-Based Compensation - Additional Information (Detail) link:calculationLink link:presentationLink link:definitionLink 154 - Disclosure - Stock-Based Compensation - Stock-Based Compensation Expense (Detail) link:calculationLink link:presentationLink link:definitionLink 155 - Disclosure - Stock-Based Compensation - Stock Option Activity (Detail) link:calculationLink link:presentationLink link:definitionLink 156 - Disclosure - Stock-Based Compensation - Weighted Average Fair Value Per Share of Options Granted, Assumptions (Detail) link:calculationLink link:presentationLink link:definitionLink 157 - Disclosure - Stock-Based Compensation - Restricted Stock Units (Detail) link:calculationLink link:presentationLink link:definitionLink 158 - Disclosure - Stock-Based Compensation - Restricted Stock Awards (Detail) link:calculationLink link:presentationLink link:definitionLink 159 - Disclosure - Stock-Based Compensation - Fair Value Estimation of Common Stock Using Black-Scholes Option Pricing Model, Weighted-Average Assumptions (Detail) link:calculationLink link:presentationLink link:definitionLink 160 - Disclosure - Income Taxes - Schedule of Provision for Income Taxes (Detail) link:calculationLink link:presentationLink link:definitionLink 161 - Disclosure - Income Taxes - Reconciliation of Provision for Income Taxes to Statutory Federal Rate (Detail) link:calculationLink link:presentationLink link:definitionLink 162 - Disclosure - Income Taxes - Significant Components of Deferred Tax Assets (Liabilities) (Detail) link:calculationLink link:presentationLink link:definitionLink 163 - Disclosure - 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