Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities Schedule of Available-for-sale Securities [Table] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Axis] Major Types of Debt and Equity Securities [Domain] Major Types of Debt and Equity Securities [Domain] Corporate debt securities Corporate Debt Securities [Member] U.S. treasury notes US Treasury Notes Securities [Member] GSEs US Government-sponsored Enterprises Debt Securities [Member] Municipal securities Municipal Securities [Member] Municipal securities. Asset-backed securities Asset-backed Securities [Member] Certificates of deposit Certificates of Deposit [Member] Subtotal - current investments Current Investments [Member] Current Investments [Member] Restricted Cash and Cash Equivalents [Axis] Restricted Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] U.S. treasury notes US Treasury Securities [Member] Subtotal - current restricted investments Restricted Investments, Current [Member] Restricted Investments, Current [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Amortized Cost Available-for-sale Debt Securities, Amortized Cost Basis Gross Unrealized Gains Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Gross Unrealized Losses Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Estimated Fair Value Available-for-sale Securities Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Pacific Healthcare IPA Affiliated Entity [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Ownership percentage Equity Method Investment, Ownership Percentage Other Liabilities Disclosure [Abstract] Medical Claims and Benefits Payable Medical Claims And Benefits Payable [Text Block] Medical claims and benefits payable. Variable Interest Entities [Abstract] Variable Interest Entities [Abstract] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Amount paid for health care services Variable Interest Entity, Financial or Other Support, Amount Administrative fee revenue Administrative Services Revenue Total carrying amount of assets Variable Interest Entity, Consolidated, Carrying Amount, Assets Total amount of liabilities Variable Interest Entity, Consolidated, Carrying Amount, Liabilities Condensed Financial Information [Abstract] Condensed Financial Information [Abstract] Condensed Consolidating Statements of Income Condensed Income Statement [Table Text Block] Condensed Consolidating Statements of Comprehensive Income Condensed Statement of Comprehensive Income [Table Text Block] Condensed Consolidating Balance Sheets Condensed Balance Sheet [Table Text Block] Condensed Consolidating Statements of Cash Flows Condensed Cash Flow Statement [Table Text Block] Statement of Cash Flows [Abstract] Statement Statement [Table] Derivative Instrument [Axis] Derivative Instrument [Axis] Derivative Contract [Domain] Derivative Contract [Domain] 1.125% Call Option Call Option, Derivative Asset [Member] Call Option, Derivative Asset [Member] 1.125% Conversion Option Embedded Derivative Financial Instruments [Member] Statement [Line Items] Statement [Line Items] Percentage of contractual interest rate on derivative Derivative, Fixed Interest Rate Goodwill and Intangible Assets Disclosure [Abstract] Balances of goodwill Schedule of Goodwill [Table Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Organization, Consolidation and Presentation of Financial Statements [Abstract] Basis Of Presentation [Table] Basis Of Presentation [Table] Basis Of Presentation [Table] Customer [Axis] Customer [Axis] Customer [Domain] Customer [Domain] Mississippi Coordinated Access Network Mississippi Coordinated Access Network [Member] Mississippi Coordinated Access Network [Member] Gain Contingencies, Nature [Axis] Gain Contingencies, Nature [Axis] Gain Contingency, Nature [Domain] Gain Contingency, Nature [Domain] Medicare Acquisition terminated Acquisition Contract Termination [Member] Acquisition Contract Termination [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Health Plans Health Plans [Member] Health plans. Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Today's Options of New York, Inc. Today's Options Of New York, Inc. [Member] Today's Options Of New York, Inc. [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] New York NEW YORK Basis Of Presentation [Line Items] Basis Of Presentation [Line Items] Basis Of Presentation [Line Items] Number of reportable segments (in segment) Number of Reportable Segments Number of states in which entity operates (in state) Number of States in which Entity Operates Number of members eligible for the health care programs, approximately (in member) Number Of Members Eligible For The Health Care Programs Number of members eligible for the health care programs. Minimum contract terms Minimum Contract Term Minimum contract term. Maximum contract terms Maximum Contract Term Maximum contract term. Costs recognized Restructuring Charges Services contract term Services Contract Term Services Contract Term Services contract renewal term Services Contract Renewal Term Services Contract Renewal Term Gain recognized on contract termination Former Gain Contingency, Recognized in Current Period Final purchase price of business acquisition Business Combination, Consideration Transferred Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Statement of Financial Position [Abstract] Common stock, par value (usd per share) Common Stock, Par or Stated Value Per Share Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Preferred stock, par value (usd per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Related Party Transactions Related Party Transactions Disclosure [Text Block] Accounting Policies [Abstract] Risk adjustment payable, Current Benefit Year Affordable Care Act, Premium Stabilization Program, Risk Adjustment, Receivable (Payable), Current Year Affordable Care Act, Premium Stabilization Program, Risk Adjustment, Receivable (Payable), Current Year Risk adjustment payable, Prior Benefit Year Affordable Care Act, Premium Stabilization Program, Risk Adjustment, Receivable (Payable), Prior Years Affordable Care Act, Premium Stabilization Program, Risk Adjustment, Receivable (Payable), Prior Years Risk adjustment payable, Total Affordable Care Act, Premium Stabilization Program, Risk Adjustment, Receivable (Payable) Affordable Care Act, Premium Stabilization Program, Risk Adjustment, Receivable (Payable) Reinsurance receivable, Current Benefit Year Affordable Care Act, Premium Stabilization Program, Reinsurance, Receivable (Payable), Current Year Affordable Care Act, Premium Stabilization Program, Reinsurance, Receivable (Payable), Current Year Reinsurance receivable, Prior Benefit Year Affordable Care Act, Premium Stabilization Program, Reinsurance, Receivable (Payable), Prior Years Affordable Care Act, Premium Stabilization Program, Reinsurance, Receivable (Payable), Prior Years Reinsurance receivable, Total Affordable Care Act, Premium Stabilization Program, Reinsurance, Receivable (Payable) Affordable Care Act, Premium Stabilization Program, Reinsurance, Receivable (Payable) Risk corridor payable, Current Benefit Year Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable (Payable), Current Year Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable (Payable), Current Year Risk corridor payable, Prior Benefit Year Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable (Payable), Prior Years Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable (Payable), Prior Years Risk corridor payable, Total Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable (Payable) Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable (Payable) Minimum MLR payable, Current Benefit Year Affordable Care Act, Premium Stabilization Program, Minimum Medical Loss Ratio, Receivable (Payable), Current Year Affordable Care Act, Premium Stabilization Program, Minimum Medical Loss Ratio, Receivable (Payable), Current Year Minimum MLR payable, Prior Benefit Year Affordable Care Act, Premium Stabilization Program, Minimum Medical Loss Ratio, Receivable (Payable), Prior Years Affordable Care Act, Premium Stabilization Program, Minimum Medical Loss Ratio, Receivable (Payable), Prior Years Minimum MLR payable, Total Affordable Care Act, Premium Stabilization Program, Minimum Medical Loss Ratio, Receivable (Payable) Affordable Care Act, Premium Stabilization Program, Minimum Medical Loss Ratio, Receivable (Payable) Fair Value Disclosures [Abstract] Fair value of assets measured on recurring basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Schedule of fair value, asset and liabilities measured on recurring basis - disclosure only Schedule Of Fair Value, Asset And Liabilities Measured On Recurring Basis [Table Text Block] Schedule of Fair Value, Asset and Liabilities Measured on Recurring Basis [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Market Prices (Level 1) Fair Value, Inputs, Level 1 [Member] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] 1.125% Conversion Option derivative liability Eligible Item or Group for Fair Value Option [Axis] Financial Instrument [Axis] Fair Value, Option, Eligible Item or Group [Domain] Financial Instruments [Domain] Government-sponsored enterprise securities (GSEs) 1.125% Call Option derivative asset Derivative Financial Instruments, Assets [Member] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Total assets measured at fair value on a recurring basis Assets, Fair Value Disclosure 1.125% Conversion Option derivative liability Derivative Liability Total liability measured at fair value on a recurring basis Financial and Nonfinancial Liabilities, Fair Value Disclosure Percentage of contractual interest rate on Call Option Statement of Comprehensive Income [Abstract] Net (loss) income Net Income (Loss) Attributable to Parent Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Unrealized investment gain Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Less: effect of income taxes Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive (loss) income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Schedule Of Premium Revenue By Health Plan Type Schedule of Premium Revenue by Health Plan Type [Table] Schedule of premium revenue by health plan type. Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Medical Premium Liability Due to Agency Medical Premium Liability Due to Agency [Member] Medical Premium Liability Due to Agency [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Medicaid Expansion Medicaid Expansion [Member] Medicaid Expansion [Member] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Adjustment Restatement Adjustment [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Schedule of Premium Revenue by Health Plan Type [Line Items] Schedule of Premium Revenue by Health Plan Type [Line Items] Schedule of premium revenue by health plan type. Medical premiums liability based on medical cost thresholds Medical Premiums Liability, Medical Care Costs Threshold Medical Premiums Liability, Medical Care Costs Threshold Amounts due government agencies Medical Premium Liability Due To Agency Medical Premium Liability Due to Agency Premium deficiency reserve Health Care Reform, Premium Deficiency Reserve Health Care Reform, Premium Deficiency Reserve Retained earnings Retained Earnings (Accumulated Deficit) Consolidation and Interim Financial Information Consolidation And Interim Financial Information, Policy [Policy Text Block] Consolidation And Interim Financial Information, Policy [Policy Text Block] Revenue Recognition – Health Plans Segment Premium Revenue [Policy Text Block] Premium revenue. Income Taxes Income Tax, Policy [Policy Text Block] Premium Deficiency Reserves on Loss Contracts Premium Deficiency Reserves On Loss Contracts [Policy Text Block] Premium Deficiency Reserves on Loss Contracts [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Consolidated Entities [Domain] Consolidated Entities [Domain] Subsidiaries Subsidiaries [Member] Ownership [Axis] Ownership [Axis] Ownership [Domain] Ownership [Domain] Pathways Pathways Health And Community Support LLC [Member] Pathways Health And Community Support LLC [Member] Other subsidiary Other Subsidiary [Member] Other Subsidiary [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Impairment loss for the carrying amount of intangible assets Impairment of Intangible Assets, Finite-lived Goodwill impairment lossess Goodwill, Impairment Loss Receivables (payables) for 3R programs Affordable Care Act, Premium Stabilization Programs, Receivables And Payables [Table Text Block] Affordable Care Act, Premium Stabilization Programs, Receivables and Payables [Table Text Block] Quality incentive premium revenue recognized Quality Incentive Premium Revenue Recognized [Table Text Block] Quality incentive premium revenue recognized. Operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net (loss) income to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation, Depletion and Amortization Impairment losses Goodwill and Intangible Asset Impairment Deferred income taxes Increase (Decrease) in Deferred Income Taxes Share-based compensation, including accelerated share-based compensation Share-based Compensation Amortization of convertible senior notes and lease financing obligations Amortization Of Debt Discount (Premium) And Sale Leaseback Financing Obligation Amortization of Debt Discount (Premium) and Sale Leaseback Financing Obligation Other, net Other Operating Activities, Cash Flow Statement Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Receivables Increase (Decrease) in Receivables Prepaid expenses and other assets Increase (Decrease) in Prepaid Expense and Other Assets Medical claims and benefits payable Increase (Decrease) in Health Care Insurance Liabilities Amounts due government agencies Increase (Decrease) In Medical Premium Liability Due To Agency Increase (Decrease) in Medical Premium Liability Due to Agency Accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Deferred revenue Increase (Decrease) in Deferred Revenue Income taxes Increase (Decrease) in Income Taxes Payable Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Purchases of investments Payments to Acquire Marketable Securities Proceeds from sales and maturities of investments Proceeds from Sale and Maturity of Marketable Securities Purchases of property, equipment and capitalized software Payments to Acquire Property, Plant, and Equipment (Increase) decrease in restricted investments held-to-maturity Increase (Decrease) of Restricted Investments Net cash paid in business combinations Payments to Acquire Businesses, Net of Cash Acquired Other, net Payments for (Proceeds from) Other Investing Activities Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from senior notes offering, net of issuance costs Proceeds from Debt, Net of Issuance Costs Proceeds from employee stock plans Proceeds from Issuance of Shares under Incentive and Share-based Compensation Plans, Including Stock Options Other, net Proceeds from (Payments for) Other Financing Activities Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Net increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents at beginning of period Cash and Cash Equivalents, at Carrying Value Cash and cash equivalents at end of period Supplemental cash flow information: Supplemental Cash Flow Information [Abstract] Schedule of non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Common stock used for share-based compensation Stock Issued Details of change in fair value of derivatives, net: Details of change in fair value of derivatives [Abstract] Details of change in fair value of derivatives Change in fair value of derivatives, net Derivative, Gain (Loss) on Derivative, Net Details of business combinations: Business Combination, Description [Abstract] Fair value of assets acquired Fair Value of Assets Acquired Purchase price amounts accrued/received Business Combination, Purchase Price Amounts Accrued (Received) Business Combination, Purchase Price Amounts Accrued (Received) Reversal of amounts advanced to sellers in prior year Business Combination, Prepaid Consideration Transferred Business Combination, Prepaid Consideration Transferred Debt Disclosure [Abstract] Schedule of Long-term Debt Instruments Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] 1.125% Convertible Notes Cash Convertible Senior Notes due 2020 [Member] Cash Convertible Senior Notes due 2020 [Member] 5.375% Notes Senior Notes Due 2022 [Member] Senior Notes Due 2022 [Member] 4.875% Notes 4.875% Senior Notes [Member] 4.875% Senior Notes [Member] 1.625% Convertible Notes Convertible Senior Notes Due 2044 [Member] Convertible Senior Notes Due 2044 [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Convertible Notes Convertible Debt [Member] Senior Notes Senior Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Current portion of long-term debt: Debt, Current [Abstract] Debt net of unamortized discount Long-Term Debt, Current Maturities, Net Of Unamortized Premium (Discount) Long-Term Debt, Current Maturities, Net Of Unamortized Premium (Discount) Lease financing obligations Capital Lease Obligations, Current Debt issuance costs Debt Issuance Costs, Current, Net Current portion of long-term debt Long-term Debt and Capital Lease Obligations, Current Non-current portion of long-term debt, reported as “Senior notes”: Long-term Debt, Excluding Current Maturities [Abstract] Debt net of unamortized debt discount Long-Term Debt, Noncurrent, Net Of Unamortized Debt Discount Long-Term Debt, Noncurrent, Net Of Unamortized Debt Discount Debt issuance costs Debt Issuance Costs, Noncurrent, Net Senior notes Long-term Debt, Excluding Current Maturities Lease financing obligations Capital Lease Obligations, Noncurrent Total debt Long-term Debt and Capital Lease Obligations, Including Current Maturities Percentage of contractual interest rate on Notes Debt Instrument, Interest Rate, Stated Percentage Schedule of liability for unpaid claims and claims adjustment expense Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Components of change in medical claims and benefits payable Components Of Change In Medical Claims And Benefits Payable [Table Text Block] Components Of Change In Medical Claims And Benefits Payable [Table Text Block] Supplemental Condensed Consolidating Financial Information Condensed Financial Statements [Text Block] Investments Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Contractual maturities of investments Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of available for sale securities continuous unrealized loss position Schedule Of Available For Sale Securities Continuous Unrealized Loss Position [Table Text Block] Schedule of available for sale securities continuous unrealized loss position. Debt Long-term Debt [Text Block] Document and Entity Information [Abstract] -- None. No documentation exists for this element. -- Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Trading Symbol Trading Symbol Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Earnings Per Share [Abstract] Summary of denominators for the computation of basic and diluted net income (loss) per share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table] Consolidation Items [Axis] Consolidation Items [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Operating Segments Operating Segments [Member] Other operating Segment Reconciling Items [Member] Molina Medicaid Solutions Medicaid Solutions Segment [Member] Molina Medicaid solutions segment. Other Other Segments [Member] Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gross margin Gross Profit Total revenue Revenues Less: other operating expenses Costs and Expenses Operating (loss) income Operating Income (Loss) Other expenses (income), net Nonoperating Income (Expense) (Loss) income before income tax (benefit) expense Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Income Statement [Abstract] Revenue: Revenues [Abstract] Premium revenue Health Care Organization, Premium Revenue Service revenue Technology Services Revenue Premium tax revenue Health Care Organization, Premium Tax Revenue Health Care Organization, Premium Tax Revenue Health insurer fee revenue Health Care Organization, Insurer Fee Revenue Health Care Organization, Insurer Fee Revenue Investment income and other revenue Interest and Dividend Income, Operating Total revenue Operating expenses: Costs and Expenses [Abstract] Medical care costs Policyholder Benefits and Claims Incurred, Net, Health Cost of service revenue Technology Services Costs General and administrative expenses General and Administrative Expense Premium tax expenses Premium Tax Expenses An assessment levied by a state government on the net premium income collected. Health insurer fee expenses Health Care Organization, Insurer Fee Expense Health Care Organization, Insurer Fee Expense Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Impairment losses Restructuring and separation costs Restructuring Costs Total operating expenses Operating (loss) income Other expenses (income), net: Nonoperating Income (Expense) [Abstract] Interest expense Interest Expense Other income, net Other Nonoperating Income (Expense) Total other expenses (income), net Income tax (benefit) expense Income Tax Expense (Benefit) Net (loss) income Net (loss) income per share: Earnings Per Share, Basic and Diluted [Abstract] Basic (in dollars per share) Earnings Per Share, Basic Diluted (in dollars per share) Earnings Per Share, Diluted Restructuring and Related Activities [Abstract] Schedule of Restructuring and Related Costs [Table] Schedule of Restructuring and Related Costs [Table] Restructuring Type [Axis] Restructuring Type [Axis] Type of Restructuring [Domain] Type of Restructuring [Domain] Separation Costs–Former Executives Employee Severance [Member] Other Restructuring Costs Other Restructuring [Member] Restructuring Cost and Reserve [Line Items] Restructuring Cost and Reserve [Line Items] Restructuring Reserve Restructuring Reserve [Roll Forward] Accrued restructuring and separation costs as of December 31, 2016 Restructuring Reserve Cash payments Payments for Restructuring Other adjustments–acceleration of share-based compensation Restructuring Reserve, Settled without Cash Accrued restructuring and separation costs as of June 30, 2017 Operating segment information Schedule of Segment Reporting Information, by Segment [Table Text Block] Restructuring and Separation Costs Restructuring and Related Activities Disclosure [Text Block] Condensed Income Statement [Table] Condensed Income Statement [Table] Parent Guarantor Parent Company [Member] Other Guarantors Guarantor Subsidiaries [Member] Non-Guarantors Non-Guarantor Subsidiaries [Member] Reportable Legal Entities Reportable Legal Entities [Member] Eliminations Consolidation, Eliminations [Member] Condensed Income Statements, Captions [Line Items] Condensed Income Statements, Captions [Line Items] Expenses: Restructuring and separation costs Net (loss) income before equity in earnings of subsidiaries Net Income (Loss) From Continuing Operations Before Equity Method Investments, Extraordinary Items, Noncontrolling Interest Net Income (Loss) From Continuing Operations Before Equity Method Investments, Extraordinary Items, Noncontrolling Interest Equity in net earnings of subsidiaries Income (Loss) from Subsidiaries, Net of Tax Forecast Scenario, Forecast [Member] Other segment Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Estimated Costs Expected to be Incurred by Reportable Segment Restructuring Costs and Asset Impairment Charges [Abstract] Total restructuring costs Restructuring and Related Cost, Expected Cost Fair Value Measurements Fair Value Disclosures [Text Block] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Cash and cash equivalents Investments Marketable Securities, Current Restricted investments Restricted Investments, Current Receivables Receivables, Net, Current Income taxes refundable Income Taxes Receivable, Current Due from (to) affiliates Related Party Transaction, Due from (to) Related Party, Current Prepaid expenses and other current assets Prepaid Expense and Other Assets, Current Derivative asset Derivative Asset, Current Total current assets Assets, Current Property, equipment, and capitalized software, net Property, Plant and Equipment, Net Deferred contract costs Costs in Excess of Billings, Noncurrent Goodwill and intangible assets, net Intangible Assets, Net (Including Goodwill) Restricted investments Restricted Investments, Noncurrent Investment in subsidiaries, net Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Deferred income taxes Deferred Income Tax Assets, Net Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND STOCKHOLDERS’ EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Medical claims and benefits payable Liability for Claims and Claims Adjustment Expense Accounts payable and accrued liabilities Accounts Payable and Accrued Liabilities, Current Deferred revenue Deferred Revenue, Current Current portion of long-term debt Derivative liability Derivative Liability, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt and Capital Lease Obligations Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Other long-term liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Total stockholders' equity Stockholders' Equity Attributable to Parent Total liabilities and stockholders' equity Liabilities and Equity Non-risk provider payables Medical Claims And Benefits Payable Medical Claims and Benefits Payable Reinsurance recoverables Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Line Items] Liability for Claims and Claims Adjustment Expense [Line Items] Percentage of IBNP not expected to be paid Short-Duration Insurance Contracts, Liability For Unpaid Claims And Claims Adjustment Expense, Uncollectible Claims Assumption Short-Duration Insurance Contracts, Liability For Unpaid Claims And Claims Adjustment Expense, Uncollectible Claims Assumption Expense (recovery) for prior period claims development Prior Year Claims and Claims Adjustment Expense Number of members added, approximately Number Of Members Added Number of Members Added Entities [Table] Entities [Table] Parent Company Pathways Health and Community Support LLC Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Rutherford County, Tennessee Rutherford County, Tennessee [Member] Rutherford County, Tennessee [Member] Litigation Case [Axis] Litigation Case [Axis] Litigation Case [Domain] Litigation Case [Domain] The Rodriquez Litigation The Rodriquez Litigation [Member] The Rodriquez Litigation [Member] Illinois ILLINOIS Puerto Rico PUERTO RICO Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event Subsequent Event [Member] Entity Information [Line Items] Entity Information [Line Items] Net assets of subsidiaries subject to restrictions Amount of Restricted Net Assets for Consolidated and Unconsolidated Subsidiaries Restricted investments Restricted Cash and Investments, Current Aggregate statutory capital and surplus Statutory Accounting Practices, Statutory Capital and Surplus, Balance Required minimum statutory capital surplus Statutory Accounting Practices, Statutory Capital and Surplus Required Premium stabilization program, risk corridor, prior years Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable Not Recognized, Prior Years Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable Not Recognized, Prior Years Premium stabilization program, risk corridor, current year Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable Not Recognized, Current Year Affordable Care Act, Premium Stabilization Program, Risk Corridor, Receivable Not Recognized, Current Year Number of plaintiffs Loss Contingency, Number of Plaintiffs Liabilities arising from contingencies, amount recognized Business Combination, Liabilities Arising from Contingencies, Amount Recognized Liabilities arising from contingencies, amount recognized Loss Contingency, Damages Awarded, Value Number of members served, approximately Health Care Organization, Number Of Members Health Care Organization, Number of Members Stockholders' Equity Note [Abstract] Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] Schedule of Deferred Compensation Arrangement with Individual, Share-based Payments [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Awards Restricted Stock [Member] Performance Stock Awards Performance Shares [Member] Performance Stock Units Restricted Stock Units (RSUs) [Member] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Deferred Compensation Arrangement with Individual, Share-based Payments [Line Items] Number of Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Beginning Balance, Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Granted, Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Vested, Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Forfeited, Shares Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending Balance, Shares Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Begining Balance (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Granted (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Vested (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Forfeited (usd per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending Balance (usd per share) Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Deferred Bonus and Profit Sharing Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain] Deferred Bonus and Profit Sharing Arrangement, Individual Contract, Type of Deferred Compensation [Domain] Deferred termination fee Deferred Termination Fee [Member] Deferred Termination Fee [Member] Deferred bonus Deferred Bonus [Member] Title of Individual [Axis] Title of Individual [Axis] Relationship to Entity [Domain] Relationship to Entity [Domain] Executive Officers Executive Officer [Member] Former CEO Chief Executive Officer [Member] Former CFO Chief Financial Officer [Member] Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Workforce concentration risk Labor Force Concentration Risk [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Number of positions eliminated in total workforce Number Of Positions Eliminated, Corporate Non-Segment And Health Plans Segment Member [Member] Number Of Positions Eliminated, Corporate Non-Segment And Health Plans Segment Member [Member] Number of positions eliminated in health plans workforce Number Of Positions Eliminated, Health Plans Segment Member [Member] Number Of Positions Eliminated, Health Plans Segment Member [Member] Cash awards as a percentage of base salary Deferred Compensation Arrangement with Individual, Cash Awards Granted, Percentage Acceleration of share-based compensation Workforce reduction Concentration Risk, Percentage Number of full-time equivalent positions eliminated (in position) Restructuring and Related Cost, Expected Number of Positions Eliminated Select Health Plans California, Illinois, New Mexico, Ohio, South Carolina, Texas, Washington, and Wisconsin [Member] California, Illinois, New Mexico, Ohio, South Carolina, Texas, Washington, and Wisconsin [Member] Percentage of additional incremental revenue earned Percentage Of Additional Incremental Revenue Earned Percentage of additional incremental revenue earned. Maximum available quality incentive premium - current period Maximum Available Quality Incentive Premium Current Year Maximum available quality incentive premium current year. Quality incentive premium revenue recognized in current period: Quality Incentive Premium Revenue Recognized [Abstract] Quality Incentive Premium Revenue Recognized [Abstract] Earned current period Amount Of Current Year Quality Incentive Premium Revenue Recognized Amount of current year quality incentive premium revenue recognized. Earned prior periods Amount Of Quality Incentive Premium Revenue Recognized From Prior Year Amount of quality incentive premium revenue recognized from prior year. Total Quality Incentive Premium Revenue Recognized Quality incentive premium revenue recognized. Quality incentive premium revenue recognized as a percentage of total premium revenue Quality Incentive Premium Revenue As A Percentage Of Total Revenue Quality Incentive Premium Revenue As A Percentage Of Total Revenue Insurance Claims Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Medical claims and benefits payable, beginning balance Components of medical care costs related to: Components Of Medical Care Costs [Abstract] Components of medical care costs. Current period Current Year Claims and Claims Adjustment Expense Prior periods Total medical care costs Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Change in non-risk provider payables Medical Claims And Benefits Payable, Adjustments, Change In Provider Medical Claims and Benefits Payable, Adjustments, Change in Provider Payments for medical care costs related to: Payments For Medical Care Costs [Abstract] Payments for medical care costs. Current period Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Prior periods Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Total paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Medical claims and benefits payable, ending balance Benefit from prior period as a percentage of: Benefit From Prior Years As Percentage [Abstract] Benefit from prior years as percentage. Balance at beginning of period Policy Holder Benefits Prior Percentage Policy holder benefits prior percentage. Premium revenue, trailing twelve months Policy Holder Premium Revenue Prior Year Percentage Policy holder premium revenue prior year percentage. Medical care costs, trailing twelve months Policy Holder Medical Care Cost Prior Year Percentage Policy holder medical care cost prior year percentage. In a Continuous Loss Position for Less than 12 Months, Estimated Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value In a Continuous Loss Position for Less than 12 Months, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss In a Continuous Loss Position for Less than 12 Months, Number of Positions (in security) Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year In a Continuous Loss Position for 12 Months or More, Estimated Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value In a Continuous Loss Position for 12 Months or More, Unrealized Losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss In a Continuous Loss Position for 12 Months or More, Number of Positions (in security) Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Condensed Statement of Comprehensive Income [Table] Condensed Statement of Comprehensive Income [Table] Condensed Statement of Income Captions [Line Items] Condensed Statement of Income Captions [Line Items] Other comprehensive income, net of tax Condensed Financial Statements [Table] Condensed Financial Statements [Table] Condensed Financial Statements, Captions [Line Items] Condensed Financial Statements, Captions [Line Items] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Derivative [Table] Current assets: Derivative asset Current Assets [Member] Current Assets [Member] Current liabilities: Derivative liability Current Liabilities [Member] Current Liabilities [Member] Derivative [Line Items] Derivative [Line Items] Derivative assets Derivative Asset, Fair Value, Gross Asset Derivative liabilities Derivative Liability, Fair Value, Gross Liability Amortized Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Estimated Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Total, Estimated Fair Value Available-for-sale Securities, Debt Maturities, Single Maturity Date Intangible assets, net Finite-Lived Intangible Assets, Net Goodwill Goodwill Senior notes Stockholders’ equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.001 par value; 150 shares authorized; outstanding: 57 shares at June 30, 2017 and at December 31, 2016 Common Stock, Value, Outstanding Preferred stock, $0.001 par value; 20 shares authorized, no shares issued and outstanding Preferred Stock, Value, Issued Additional paid-in capital Additional Paid in Capital, Common Stock Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total stockholders’ equity Schedule of Goodwill [Table] Schedule of Goodwill [Table] Goodwill Goodwill [Line Items] Historical goodwill Goodwill, Gross Accumulated impairment losses Goodwill, Impaired, Accumulated Impairment Loss Goodwill Goodwill Goodwill [Roll Forward] Beginning balance Impairment loss Ending balance Restructuring Reserve Schedule of Restructuring Reserve by Type of Cost [Table Text Block] Expected Costs Restructuring and Related Costs [Table Text Block] Variable Interest Entities (VIEs) Variable Interest Entity Disclosure [Text Block] Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Stock Common Stock [Member] Class of Stock [Line Items] Class of Stock [Line Items] Decrease in stockholders' equity Stockholders' Equity, Period Increase (Decrease) Employee stock transactions Stock Issued During Period, Value, Employee Stock Purchase Plan Number of warrants issued (in shares) Debt Conversion, Converted Instrument, Warrants or Options Issued Warrant, strike price per share (usd per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Stated percentage of warrants Class Of Warrant Or Right, Stated Percentage Class of Warrant or Right, Stated Percentage Number of common stock issued (in shares) Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures Total fair value of awards granted Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted In Period, Fair Value Total fair value of awards vested Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Accelerated vesting of awards (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number Employee stock compensation expense Allocated Share-based Compensation Expense Accelerated compensation expense Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost Unrecognized compensation expense Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Weighted average period for recognition Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition Unrecognized compensation forfeiture rate Unrecognized Compensation Forfeited Rate Unrecognized compensation forfeited rate. Fee-for-service claims incurred but not paid (IBNP) Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Amount Pharmacy payable Pharmacy Claims Payable Pharmacy Claims Payable Capitation payable Capitation Claims Payable Capitation Claims Payable Other Other Claims Payable Other Claims Payable Medical claims and benefits payable Amortized Cost Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract] Due in one year or less Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount Due after one year through five years Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount Held-to-maturity Securities Held-to-maturity Securities Estimated Fair Value Held-to-maturity Securities, Debt Maturities, Single Maturity Date, Fair Value [Abstract] Due in one year or less Held-to-maturity Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years Held-to-maturity Securities, Debt Maturities, Year Two Through Five, Fair Value Estimated Fair Value, Total Held-to-maturity Securities, Fair Value Significant Accounting Policies Significant Accounting Policies [Text Block] Unsecured Debt Unsecured Debt [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Credit Facility Revolving Credit Facility [Member] Letter of Credit Letter of Credit [Member] Debt Commitment Letter Debt Commitment Letter [Member] Debt Commitment Letter [Member] Face amount of debts Debt Instrument, Face Amount Aggregate principal amount of notes outstanding Long-term Debt, Gross Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Amount outstanding under Letter of Credit Long-term Line of Credit Current borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Term of debt instrument Debt Instrument, Term Amount outstanding under the Credit Facility Line of Credit, Current Conversion price per share of common stock (in dollars per share) Debt Instrument, Convertible, Conversion Price Numerator: Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Denominator: Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Denominator for basic net (loss) income per share (in shares) Weighted Average Number of Shares Outstanding, Basic Effect of dilutive securities: Dilutive Securities, Effect on Basic Earnings Per Share [Abstract] 1.125% Warrants (in shares) Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants Denominator for diluted net (loss) income per share (in shares) Weighted Average Number of Shares Outstanding, Diluted Potentially dilutive common shares excluded from calculations: Earnings Per Share, Diluted, Other Disclosures [Abstract] 1.125% Warrants Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Derivative Instruments in Statement of Financial Position, Fair Value Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Net cash (used in) provided by operating activities Capital contributions to/from subsidiaries Payments to Acquire Additional Interest in Subsidiaries Dividends to/from subsidiaries Proceeds from Dividends Received Change in amounts due to/from affiliates Changes In Amounts Due To And Due From Affiliates Changes in amounts due to and due from affiliates. Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Stockholders' Equity Stockholders' Equity Note Disclosure [Text Block] Long term debt Schedule of Long-term Debt Instruments [Table Text Block] Restricted share activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Impairment loss Restructuring and separation costs Total Assets Goodwill, and Intangible Assets, Net Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Measurement Basis [Axis] Measurement Basis [Axis] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Carrying Value Reported Value Measurement [Member] Fair Value Estimate of Fair Value Measurement [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair value of debt Debt Instrument, Fair Value Disclosure Impairment Losses Asset Impairment Charges [Text Block] Segment Information Segment Reporting Disclosure [Text Block] Net (Loss) Income per Share Earnings Per Share [Text Block]