Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] Common Stock - Class A Common Class A [Member] Statement [Line Items] Statement [Line Items] Fixed maturities, amortized cost Available-for-sale Debt Securities, Amortized Cost Basis Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Common stock, shares authorized (in shares) Common Stock, Shares Authorized Reinsurance Disclosures [Abstract] Net premiums written Premiums Written, Net Increase in unearned premiums (Increase) Decrease in Unearned Premiums, Net Net premiums earned Premiums Earned, Net Investments, Debt and Equity Securities [Abstract] Schedule of Available-for-sale Securities [Table] 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] U.S. Treasury securities and obligations of U.S. government agencies US Treasury and Government [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Cash and investments held with various state insurance departments Cash, Cash Equivalents, and Short-term Investments Unrealized loss position, accumulated loss Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Unrealized losses, 12 months or greater Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Fair Value Disclosures [Abstract] Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Income Statement [Abstract] Net unrealized investment gains in AOCI, tax amount Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Reclassification adjustment for losses (gains) included in net loss, tax amount Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Debt Disclosure [Abstract] Line of Credit Facility [Table] Line of Credit Facility [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock - Class A Common Stock [Member] Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Warrants issued (in shares) Class of Warrant or Right, Number of Securities Called by Warrants or Rights Right to purchase, number of shares per warrant Number Of Shares, Right To Purchase Per Warrant Number Of Shares, Right To Purchase Per Warrant Exercise price of warrants (in dollars per warrant) Class of Warrant or Right, Exercise Price of Warrants or Rights Warrants value Warrants and Rights Outstanding Number of warrants exercised during period Class of Warrant or Right, Number of Warrants Exercised During Period Class of Warrant or Right, Number of Warrants Exercised During Period Issuance of Class A shares of common stock as part of cashless exercise of warrants, shares Stock Issued During Period, Shares, Other Gain from settlement of warrants Gain (Loss) From Settlement of Warrants Gain (Loss) From Settlement of Warrants Insurance [Abstract] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Beginning balance Liability for Claims and Claims Adjustment Expense Less reinsurance recoverables Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments Beginning balance, net of reinsurance recoverables Liability for Unpaid Claims and Claims Adjustment Expense, Net Claims incurred: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Current year Current Year Claims and Claims Adjustment Expense Prior years Prior Year Claims and Claims Adjustment Expense Total claims and claims expenses incurred Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Claims and claim expenses paid: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Current year Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Prior years Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Total claims and claim expenses paid Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Ending balance, net of reinsurance recoverables Add reinsurance recoverables Reserve at end of period, net of reinsurance recoverables Schedule of Future Principal Payments Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Fair Values and Gross Unrealized Gains and Losses Available-for-sale Securities [Table Text Block] Schedule of Investments by Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Schedule of Aging Unrealized Losses Schedule of Unrealized Loss on Investments [Table Text Block] Net Investment Income Investment Income [Table Text Block] Net Realized Investments Gains (Losses) Realized Gain (Loss) on Investments [Table Text Block] Statement of Stockholders' Equity [Abstract] Change in unrealized investment gains/losses, tax Municipal debt securities US States and Political Subdivisions Debt Securities [Member] Corporate debt securities Corporate Debt Securities [Member] Asset-backed securities Asset-backed Securities [Member] Bonds Bonds [Member] Short-term investments Short-term Investments [Member] Amortized Cost Available-for-sale 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 Fair Value Available-for-sale Securities Net premiums written Premiums Written, Net [Abstract] Direct Direct Premiums Written Ceded Ceded Premiums Written Net premiums written Net premiums earned Premiums Earned, Net [Abstract] Direct Direct Premiums Earned Ceded Ceded Premiums Earned Statutory Information Insurance Disclosure [Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value Measurements, Recurring and Nonrecurring [Table] Measurement Frequency [Axis] Measurement Frequency [Axis] Fair Value, Measurement Frequency [Domain] Fair Value, Measurement Frequency [Domain] Fair Value, Measurements, Recurring Fair Value, Measurements, Recurring [Member] Fair Value, Hierarchy [Axis] Fair Value, Hierarchy [Axis] Fair Value Hierarchy [Domain] Fair Value Hierarchy [Domain] Quoted Prices in Active Markets for Identical Assets (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] Municipal debt securities 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] Available-for-sale securities Cash, cash equivalents and short-term investments Cash and Cash Equivalents, Fair Value Disclosure Total assets Assets, Fair Value Disclosure Warrant liability Warrant Liability Warrant Liability Total liabilities Financial and Nonfinancial Liabilities, Fair Value Disclosure Assets Assets [Abstract] Fixed maturities, available-for-sale, at fair value (amortized cost of $628,209 and $564,319 as of September 30, 2016 and December 31, 2015, respectively) Available-for-sale Securities, Debt Securities Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Premiums receivable Premiums Receivable, Net Accrued investment income Accrued Investment Income Receivable Prepaid expenses Prepaid Expense Deferred policy acquisition costs, net Deferred Policy Acquisition Costs Software and equipment, net Property, Plant and Equipment, Net Intangible assets and goodwill Intangible Assets, Net (Including Goodwill) Prepaid reinsurance premiums Prepaid Reinsurance Premiums Other assets Other Assets Total assets Assets Liabilities Liabilities [Abstract] Term loan Long-term Debt Unearned premiums Unearned Premiums Accounts payable and accrued expenses Accounts Payable and Accrued Liabilities Reserve for insurance claims and claim expenses Reinsurance funds withheld Funds Held under Reinsurance Agreements, Liability Deferred ceding commission Deferred Revenue Warrant liability, at fair value Current tax payable Taxes Payable, Current Deferred tax Deferred Tax Liabilities, Net Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Shareholders' Equity Stockholders' Equity Attributable to Parent [Abstract] Common stock - class A shares, $0.01 par value; 59,138,663 and 58,807,825 shares issued and outstanding as of September 30, 2016 and December 31, 2015, respectively (250,000,000 shares authorized) Common Stock, Value, Outstanding Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive income (loss), net of tax Accumulated Other Comprehensive Income (Loss), Net of Tax Accumulated deficit Retained Earnings (Accumulated Deficit) Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity Revenues Revenues [Abstract] Net premiums earned Net investment income Net Investment Income Net realized investment gains (losses) Available-for-sale Securities, Gross Realized Gain (Loss) Other revenues Other Revenue, Net Total revenues Revenues Expenses Costs and Expenses [Abstract] Insurance claims and claims expenses Policyholder Benefits and Claims Incurred, Net, Property, Casualty and Liability Underwriting and operating expenses Other Cost and Expense, Operating Total expenses Costs and Expenses Other (expense) income Other Income and Expenses [Abstract] (Loss) gain from change in fair value of warrant liability Gain (Loss) on Change in Fair Value of Warrant Liability Gain (Loss) on Change in Fair Value of Warrant Liability Interest expense Interest Expense, Debt Total other (expense) income Other Nonoperating Income (Expense) Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income (loss) Net Income (Loss) Attributable to Parent Earnings (loss) per share Earnings Per Share, Basic and Diluted [Abstract] Basic earnings (loss) per share (in dollars per share) Earnings Per Share, Basic Diluted earnings (loss) per share (in dollars per share) Earnings Per Share, Diluted Weighted average common shares outstanding Weighted Average Number of Shares Outstanding Reconciliation [Abstract] Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Dilutive weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Net unrealized gains (losses) in accumulated other comprehensive gain (loss), net of tax (benefit) expense of $0 for all periods presented Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Reclassification adjustment for losses (gains) included in net loss, net of tax expense of $0 for all periods presented Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other comprehensive income (loss), net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Warrants Line of Credit and Related Warrants [Text Block] Line of Credit and Related Warrants [Text Block] Statement of Cash Flows [Abstract] Cash flows from operating activities Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net realized investment losses (gains) Loss (gain) from change in fair value of warrant liability Fair Value Adjustment of Warrants Depreciation and amortization Depreciation, Amortization and Accretion, Net Net amortization of premium on investment securities Accretion (Amortization) of Discounts and Premiums, Investments Amortization of debt discount and debt issuance costs Amortization of Debt Issuance Costs and Discounts Share-based compensation expense Share-based Compensation Changes in operating assets and liabilities: Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract] Current tax payable Expense (Benefit) for Taxes on Current Year Unrealized Gains Expense (Benefit) for Taxes on Current Year Unrealized Gains Accrued investment income Increase (Decrease) in Accrued Investment Income Receivable Premiums receivable Increase (Decrease) in Premiums Receivable Prepaid expenses Increase (Decrease) in Prepaid Expense Deferred policy acquisition costs, net Increase (Decrease) in Deferred Policy Acquisition Costs Other assets Increase (Decrease) in Prepaid Expense and Other Assets Unearned premiums Increase (Decrease) in Unearned Premiums Reserve for insurance claims and claims expenses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Reinsurance balances, net Increase (Decrease) in Reinsurance Assets and Liabilities Increase (Decrease) in Reinsurance Assets and Liabilities Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Cash flows from investing activities Net Cash Provided by (Used in) Investing Activities [Abstract] Purchase of fixed-maturity investments, available-for-sale Payments to Acquire Available-for-sale Securities, Debt Proceeds from redemptions, maturities and sale of fixed-maturity investments, available-for-sale Proceeds from Sale and Maturity of Available-for-sale Securities Purchase of software and equipment Payments to Acquire Property, Plant, and Equipment Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities Net Cash Provided by (Used in) Financing Activities [Abstract] Issuance of common stock Proceeds from Issuance of Common Stock Taxes paid related to net share settlement of equity awards Payments Related to Tax Withholding for Share-based Compensation Repayments of term loan Repayments of Long-term Debt Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Net (decrease) increase in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents, beginning of period Cash and cash equivalents, end of period Noncash financing activities Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Interest paid Interest Paid Liability Class [Axis] Liability Class [Axis] Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Warrant Liability Warrant Liability [Member] Warrant Liability [Member] Share Price (in dollars per share) Share Price Risk free rate Fair Value Assumptions, Risk Free Interest Rate Expected term Fair Value Assumptions, Expected Term Volatility assumption Fair Value Assumptions, Expected Volatility Rate Expected dividend rate Fair Value Assumptions, Expected Dividend Rate Document and Entity Information [Abstract] Document and Entity Information [Abstract] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Document Type Document Type Document Period End Date Document Period End Date Amendment Flag Amendment Flag Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus 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 Term Loan Debt Disclosure [Text Block] Gross realized investment gains Available-for-sale Securities, Gross Realized Gains Gross realized investment losses Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments Net realized investment gains (losses) Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Schedule of Statutory Net Loss, Surplus, Contingency Reserve and Risk-to-Capital Ratio Statutory Accounting Practices Disclosure [Table Text Block] Income Tax Disclosure [Abstract] Federal statutory income tax rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective income tax rate on pre-tax loss Effective Income Tax Rate Reconciliation, Percent Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] MAC Financial Holding Corporation and Subsidiaries MAC Financial Holding Corporation and Subsidiaries [Member] MAC Financial Holding Corporation and Subsidiaries [Member] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] [Domain] for Sale of Stock [Axis] IPO IPO [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Stock issued during period, shares, net issues (in shares) Stock Issued During Period, Shares, New Issues Proceeds from issuance of common stock, net of stock issuance costs Proceeds From Issuance of Common Stock, Net of Stock Issuance Costs Proceeds From Issuance of Common Stock, Net of Stock Issuance Costs Consideration transferred, cash and equity interests issued and issuable Business Combination, Consideration Transferred, Cash and Equity Interests Issued and Issuable Business Combination, Consideration Transferred, Cash and Equity Interests Issued and Issuable Consideration transferred, liabilities incurred Business Combination, Consideration Transferred, Liabilities Incurred Number of states in which the entity operates Number of States in which Entity Operates Deferred policy acquisition cost, amortization expense Deferred Policy Acquisition Cost, Amortization Expense Premium deficiency reserve Premium Deficiency Reserve, Expense Premium Deficiency Reserve, Expense Organization and Basis of Presentation Business Description and Basis of Presentation [Text Block] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Ceded Credit Risk [Table] Ceded Credit Risk [Table] Reinsurance Policy, Type [Axis] Reinsurance Policy, Type [Axis] Reinsurance Policy [Domain] Reinsurance Policy [Domain] Existing Risk Written Policies Eligible Policies, Pool One [Member] Eligible Policies, Pool One [Member] Fannie Mae Eligible Policies, Pool Two [Member] Eligible Policies, Pool Two [Member] Risk Written Policies from September 1, 2016 through December 31, 2017 Eligible Policies, Pool Three [Member] Eligible Policies, Pool Three [Member] Ceded Credit Risk, Reinsurer [Axis] Ceded Credit Risk, Reinsurer [Axis] Ceded Credit Risk, Reinsurer [Domain] Ceded Credit Risk, Reinsurer [Domain] Third-Party Reinsurers Third-Party Reinsurers [Member] Third-Party Reinsurers [Member] Ceded Credit Risk [Line Items] Ceded Credit Risk [Line Items] Percent of policies ceded under 2016 QSR Transaction Reinsurance Retention Policy, Reinsured Risk, Percentage Ceding commissions under 2016 QSR Transaction Ceded Credit Risk, Commission Earned, Percentage Ceded Credit Risk, Commission Earned, Percentage Threshold for loss ratio on loans under 2016 QSR Transaction to qualify for profit commission Ceded Credit Risk, Profit Commission, Loss Ratio On Loans Threshold Ceded Credit Risk, Profit Commission, Loss Ratio On Loans Threshold Reinsurance recoverable on loss reserves Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] Combined NMic and Re one Combined [Member] NMic and Re one Combined [Member] Statutory Accounting Practices [Line Items] Statutory Accounting Practices [Line Items] Statutory net loss Statutory Accounting Practices, Statutory Net Income Amount Statutory surplus Statutory Accounting Practices, Statutory Capital and Surplus, Balance Contingency reserve Statutory Accounting Practices, Contingency Reserve Contingency reserve recorded under Statutory Accounting Principles is a liability to protect against loss during periods of extreme contraction. Risk-to-Capital Risk To Capital Ratio Regulatory Actual This concept represents an entity's ratio of net risk in force (excludes risk ceded through reinsurance contracts and risk in force on defaulted loans) to the amount of statutory capital (defined as the sum of statutory policyholders' surplus plus statutory contingency reserves). Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Senior Secured Debt Senior Secured Debt [Member] Senior Secured Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Credit Agreement Credit Agreement [Member] Credit Agreement [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Eurodollar Eurodollar [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt instrument term Debt Instrument, Term Debt instrument, face amount Debt Instrument, Face Amount Variable rate floor Debt Instrument, Variable Interest Rate Floor Debt Instrument, Variable Interest Rate Floor Basis spread on variable rate Debt Instrument, Basis Spread on Variable Rate Interest rate during period Debt Instrument, Interest Rate During Period Periodic payment of principal Debt Instrument, Periodic Payment, Principal Term loan Long-term Debt, Gross Debt issuance cost Payments of Debt Issuance Costs Percentage of debt discount Debt Discount (Premium), Percentage Debt Discount (Premium), Percentage Interest expense Debt instrument covenant, maximum debt-to-total capitalization ratio Debt Instrument, Covenant, Debt to Total Capitalization Ratio, Maximum Debt Instrument, Covenant, Debt to Total Capitalization Ratio, Maximum Debt instrument covenant, maximum risk-to-capital ratio Debt Instrument, Covenant, Risk to Capital Ratio, Maximum Debt Instrument, Covenant, Risk to Capital Ratio, Maximum Debt instrument covenant, minimum liquidity requirement Debt Instrument, Covenant, Liquidity Requirement, Minimum Debt Instrument, Covenant, Liquidity Requirement, Minimum Reinsurance Reinsurance [Text Block] Income Taxes Income Tax Disclosure [Text Block] Number of securities, less than 12 months Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year Fair value, less than 12 months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Unrealized losses, less than 12 months Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Number of securities,12 months or greater Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Fair value, 12 months or greater Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Unrealized losses, 12 months or greater Number of securities, total Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Unrealized Losses Effects of Reinsurance Effects of Reinsurance [Table Text Block] Amortized Cost Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after five through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Asset-backed securities Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis Fair Value Available-for-sale Securities, Debt Maturities, Single Maturity Date [Abstract] Due in one year or less Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one through five years Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five through ten years Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Asset-backed securities Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value Fair Value Ceded risk-in-force Risk In Force, Ceded Risk In Force, Ceded Ceded premiums written Ceded premiums earned Ceding commission written Reinsurance Ceding Commission Written Reinsurance Ceding Commission Written Ceding commission earned Reinsurance Ceding Commission Earned Reinsurance Ceding Commission Earned Earnings Per Share [Abstract] Dilutive effect of non-vested shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Dilutive weighted average shares outstanding (in shares) Common Stock Additional Paid-in Capital Additional Paid-in Capital [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Accumulated Deficit Retained Earnings [Member] Class A Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Beginning balance (in shares) Shares, Outstanding Beginning balance Common stock: class A shares issued under stock plans, net of shares withheld for employee taxes (in shares) Stock Issued During Period, Shares, Employee Stock Purchase Plans, Net of Shares For Tax Withholdings Stock Issued During Period, Shares, Employee Stock Purchase Plans, Net of Shares For Tax Withholdings Common stock: class A shares issued under stock plans, net of shares withheld for employee taxes Stock Issued During Period, Value, Employee Stock Purchase Plan, Net of Tax Withholdings Stock Issued During Period, Value, Employee Stock Purchase Plan, Net of Tax Withholdings Share-based compensation expense Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Change in unrealized investment gains/losses, net of tax Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax Ending balance (in shares) Ending balance Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities [Axis] Antidilutive Securities [Axis] Antidilutive Securities, Name [Domain] Antidilutive Securities, Name [Domain] Stock Compensation Plan and Warrant Stock Compensation Plan and Warrant [Member] Stock Compensation Plan and Warrant [Member] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive securities excluded from EPS calculation (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Beginning balance Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value Change in fair value of warrant liability included in earnings Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Ending balance Future Principal Payments [Abstract] Long-term Debt, Fiscal Year Maturity [Abstract] 2016 Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 2017 Long-term Debt, Maturities, Repayments of Principal in Year Two 2018 Long-term Debt, Maturities, Repayments of Principal in Year Three Total Reconciliation of Liability for Insurance Claims and Claims Expenses Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Reserves for Insurance Claims and Claim Expenses Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Earnings (Loss) Per Share (EPS) Earnings Per Share [Text Block] Investment Income, Net [Abstract] Investment Income, Net [Abstract] Investment income Investment Income, Interest and Dividend Investment expenses Investment Income, Investment Expense Net investment income Investment Income, Net Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs, Policy [Policy Text Block] Premium Deficiency Reserves Premium Deficiency Reserves Policy [Policy Text Block] Premium Deficiency Reserves Policy [Policy Text Block] Reinsurance Reinsurance Accounting Policy [Policy Text Block] Recent Accounting Pronouncements New Accounting Pronouncements, Policy [Policy Text Block] Earnings Per Share Earnings Per Share, Policy [Policy Text Block] Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Table] Counterparty Name [Axis] Counterparty Name [Axis] Counterparty Name [Domain] Counterparty Name [Domain] Fannie Mae Fannie Mae [Member] Fannie Mae [Member] Liability for Claims and Claims Adjustment Expense [Line Items] Liability for Claims and Claims Adjustment Expense [Line Items] IBNR, default period (at least) Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Default Period Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Default Period Liability for insurance claims Primary loans in default Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Number of Primary Loans in Default Liability for Unpaid Claims and Claims Adjustment Expense, Incurred but Not Reported (IBNR) Claims, Number of Primary Loans in Default Number of claims paid Liability for Unpaid Claims and Claims Adjustment Expense, Number of Claims Paid Liability for Unpaid Claims and Claims Adjustment Expense, Number of Claims Paid Claims paid Number of loans in pool past due 60 days or more Loans In Pool, Past Due 60 Days Or More, Number Of Loans Loans In Pool, Past Due 60 Days Or More, Number Of Loans Risk in Force of loans in pool past due 60 days or more Loans In Pool, Past Due 60 Days Or More, Loan Risk in Force Loans In Pool, Past Due 60 Days Or More, Risk in Force Deductible on policy Mortgage Pool Insurance, Claim Deductible Mortgage Pool Insurance, Claim Deductible Loan-to-value ratio (less than) Loans In Pool, Loan To Value Ratio Loans In Pool, Loan To Value Ratio Claims applied to deductible Liability for Unpaid Claims and Claims Adjustment Expense, Claims Applied to Deductible Liability for Unpaid Claims and Claims Adjustment Expense, Claims Applied to Deductible Favorable prior year development Reserve for prior year insurance claims and claim expenses Liability for Prior Year Claims and Claims Adjustment Expense Liability for Prior Year Claims and Claims Adjustment Expense Fair Value Measurements, Recurring and Nonrecurring Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Roll-Forward of Level 3 Liabilities Measured at Fair Value Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]