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2104100 - Disclosure - Business Combinations
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2121100 - Disclosure - Commitments and Contingencies
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2124100 - Disclosure - Condensed Financial Information of Registrant
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2424402 - Disclosure - Condensed Financial Information of Registrant - Condensed Balance Sheets (Details)
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2424406 - Disclosure - Condensed Financial Information of Registrant - Condensed Statements of Cash Flows (Details)
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2424405 - Disclosure - Condensed Financial Information of Registrant - Condensed Statements of Comprehensive Income (Details)
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2424407 - Disclosure - Condensed Financial Information of Registrant - Notes to Condensed Financial Information (Details)
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1001000 - Statement - Consolidated Balance Sheets
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2114100 - Disclosure - Derivative Financial Instruments
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2414402 - Disclosure - Derivative Financial Instruments - Fair Value on Consolidated Balance Sheets (Details)
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2117100 - Disclosure - Employee Benefits
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2105100 - Disclosure - Fair Value Measurements
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2405402 - Disclosure - Fair Value Measurements (Details)
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2405403 - Disclosure - Fair Value Measurements - Financial Instruments on a Recurring Basis (Details)
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2405405 - Disclosure - Fair Value Measurements - Long-term Debt (Details)
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2305301 - Disclosure - Fair Value Measurements (Tables)
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2405404 - Disclosure - Fair Value Measurements - Unobservable Inputs (Details)
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2109100 - Disclosure - Goodwill and Intangible Assets
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2409404 - Disclosure - Goodwill and Intangible Assets - Balances of Goodwill and Indefinite-lived Intangible Assets (Details)
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2409402 - Disclosure - Goodwill and Intangible Assets (Details)
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2115100 - Disclosure - Income Taxes
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2415402 - Disclosure - Income Taxes (Details)
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2415403 - Disclosure - Income Taxes - Provision for income taxes (Details)
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2415404 - Disclosure - Income Taxes - Reconciliation of the U.S. Federal Statutory Income Tax Rate (Details)
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2106100 - Disclosure - Investments
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2406405 - Disclosure - Investments - Available-for-Sale (Details)
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2406404 - Disclosure - Investments - Contractual Maturities (Details)
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2406402 - Disclosure - Investments (Details)
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2406403 - Disclosure - Investments - Schedule of Investments (Details)
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2306301 - Disclosure - Investments (Tables)
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2112100 - Disclosure - Long-Term Debt
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2412404 - Disclosure - Long-Term Debt - Details of the Liability Component (Details)
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2412405 - Disclosure - Long-Term Debt - Interest Cost Recognized (Details)
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2412406 - Disclosure - Long-Term Debt - Lease Financing Obligations (Details)
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2412402 - Disclosure - Long-Term Debt - Maturities (Details)
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2412403 - Disclosure - Long-Term Debt - Senior Notes (Details)
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2111100 - Disclosure - Medical Claims and Benefits Payable
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2411403 - Disclosure - Medical Claims and Benefits Payable (Details)
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2411402 - Disclosure - Medical Claims and Benefits Payable - Medical Claims and Future Benefits (Details)
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2311301 - Disclosure - Medical Claims and Benefits Payable (Tables)
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2103100 - Disclosure - Net Income per Share
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2403402 - Disclosure - Net Income per Share - Computation of Basic and Diluted EPS (Details)
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2108100 - Disclosure - Property, Equipment, and Capitalized Software
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2408403 - Disclosure - Property, Equipment, and Capitalized Software (Details)
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2408404 - Disclosure - Property, Equipment, and Capitalized Software - Future Minimum Rentals (Details)
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2408402 - Disclosure - Property, Equipment, and Capitalized Software - Summary of Property, Equipment, and Capitalized Software (Details)
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2308301 - Disclosure - Property, Equipment, and Capitalized Software (Tables)
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2123100 - Disclosure - Quarterly Results of Operations (Unaudited)
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2107100 - Disclosure - Receivables
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2119100 - Disclosure - Related Party Transactions
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2110100 - Disclosure - Restricted Investments
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2122100 - Disclosure - Segment Information
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2118100 - Disclosure - Share-Based Compensation
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2418405 - Disclosure - Share-Based Compensation - Stock Option Activity (Details)
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2418406 - Disclosure - Share-Based Compensation - Weighted-average Grant Date Fair Value (Details)
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2102100 - Disclosure - Significant Accounting Policies
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2402406 - Disclosure - Significant Accounting Policies - Consolidated Medical Care Costs (Details)
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2402403 - Disclosure - Significant Accounting Policies - Depreciation and Amortization (Details)
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2402407 - Disclosure - Significant Accounting Policies (Details)
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2202201 - Disclosure - Significant Accounting Policies (Policies)
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2402405 - Disclosure - Significant Accounting Policies - Quality Incentive Premium Revenue (Details)
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2402404 - Disclosure - Significant Accounting Policies - Schedule of Premium Revenue (Details)
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2302302 - Disclosure - Significant Accounting Policies (Tables)
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2116100 - Disclosure - Stockholders' Equity
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2416401 - Disclosure - Stockholders' Equity (Details)
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2120100 - Disclosure - Variable Interest Entities
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2420401 - Disclosure - Variable Interest Entities (Details)
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