Income Statement [Abstract] Revenue Revenues [Abstract] Premiums Premiums Written, Net [Abstract] Gross earned premiums Premiums Earned, Gross Premiums Earned, Gross Ceded earned premiums Ceded Premiums Earned Net earned premiums Premiums Earned, Net Net investment income Net Investment Income Net realized investment gains (losses) Realized Investment Gains (Losses) Change in fair value of equity securities Equity Securities, FV-NI, Unrealized Realized Gain (Loss) Equity Securities, FV-NI, Unrealized Realized Gain (Loss) Other income Other Income Total revenue Revenues Expenses Benefits, Losses and Expenses [Abstract] Losses and loss adjustment expenses, net Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Policy acquisition costs Deferred Policy Acquisition Costs, Amortization Expense Operating expenses Operating Expenses Interest expense Interest Expense Total expenses Benefits, Losses and Expenses Income (loss) before equity earnings of affiliates and income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Equity earnings of affiliates, net of tax Income (Loss) from Equity Method Investments Income tax expense Income Tax Expense (Benefit) Net income (loss) Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Earnings (loss) per per common share, basic and diluted (in dollars per share) Earnings Per Share, Basic and Diluted Weighted average common shares outstanding, basic and diluted (in shares) Weighted Average Number of Shares Outstanding, Basic and Diluted Reinsurance Disclosures [Abstract] Written premiums: Direct Direct Premiums Written Assumed Assumed Premiums Written Ceded Ceded Premiums Written Net written premiums Premiums Written, Net Earned premiums: Premiums Earned, Net [Abstract] Direct Direct Premiums Earned Assumed Assumed Premiums Earned Ceded Losses and LAE: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Direct Direct Claims And Claims Adjustment Expense Amount of expense for direct claims incurred. Assumed Assumed Claims And Claims Adjustment Expense Amount of expense for assumed claims incurred. Ceded Ceded Claims And Claims Adjustment Expense Amount of expense for ceded claims incurred. Total net incurred losses and LAE Segment Reporting [Abstract] Schedule of Segment Reporting Information Schedule of Segment Reporting Information, by Segment [Table Text Block] Statement of Comprehensive Income [Abstract] Net income (loss) Other comprehensive income (loss), net of tax: Other Comprehensive Income (Loss), Net of Tax [Abstract] Unrealized investment gains (losses): Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, before Tax, [Abstract] Unrealized investment gains (losses) during the period Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, before Tax Income tax expense (benefit) Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Tax Unrealized investment gains (losses), net of tax Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax Less: reclassification adjustments to: Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax [Abstract] Net realized investment gains (losses) included in net income (loss) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax Income tax expense (benefit) Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax Total reclassifications included in net income (loss), net of tax Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Total comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Earnings Per Share [Abstract] Schedule of Earnings Per Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Investments, Debt and Equity Securities [Abstract] Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Financial Instrument [Axis] Financial Instrument [Axis] Financial Instruments [Domain] Financial Instruments [Domain] U.S. Government US Government Agencies Debt Securities [Member] State and local government US States and Political Subdivisions Debt Securities [Member] Corporate debt Corporate Debt Securities [Member] Asset-backed securities Asset-backed Securities [Member] Mortgage-backed securities Residential Mortgage Backed Securities [Member] Commercial mortgage-backed securities Commercial Mortgage Backed Securities [Member] Collateralized mortgage obligations Collateralized Mortgage Backed Securities [Member] Debt securities Debt Securities [Member] Equity Securities Equity Securities [Member] Schedule of Available-for-sale Securities [Line Items] Schedule of Available-for-sale Securities [Line Items] Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure [Abstract] Less than 12 months, number of issues Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less than One Year Greater than 12 months, number of issues Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Greater than or Equal to One Year Total Number of Issues Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] Less than 12 months, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value Greater than 12 months, fair value Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value Total Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract] Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss [Abstract] Less than 12 months, unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Greater than 12 months, unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Total Unrealized losses Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Investment Income [Table] Investment Income [Table] Investment Type [Axis] Investment Type [Axis] Investments [Domain] Investments [Domain] Debt securities Equity securities Cash and short-term investments Cash and Cash Equivalents [Member] Net Investment Income [Line Items] Net Investment Income [Line Items] Investment income Gross Investment Income, Operating Investment expenses Investment Income, Investment Expense Net investment income Statement of Financial Position [Abstract] Assets Assets [Abstract] Investment securities: Investments [Abstract] Debt securities, at fair value (amortized cost of $137,025 and $137,004, respectively) Available-for-sale Securities, Debt Securities Equity securities, at fair value (cost of $8,664 and $8,629, respectively) Available-for-sale Securities, Equity Securities Short-term investments, at fair value Short-term Investments Total investments Investments Cash Cash Premiums and agents' balances receivable, net Premiums Receivable, Net Receivable from Affiliate Due from Affiliates Reinsurance recoverables on unpaid losses Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Reinsurance recoverables on paid losses Reinsurance Recoverable for Paid Claims and Claims Adjustments Prepaid reinsurance premiums Prepaid Reinsurance Premiums Deferred policy acquisition costs Deferred Policy Acquisition Costs Other assets Other Assets Total assets Assets Liabilities and Shareholders' Equity Liabilities and Equity [Abstract] Liabilities: Liabilities [Abstract] Unpaid losses and loss adjustment expenses Liability for Claims and Claims Adjustment Expense Unearned premiums Unearned Premiums Reinsurance premiums payable Reinsurance Payable Debt Long-term Debt Accounts payable and other liabilities Accounts Payable and Accrued Liabilities Total liabilities Liabilities Commitments and contingencies Commitments and Contingencies Shareholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, no par value (100,000,000 shares authorized; 8,520,328 issued and outstanding, respectively) Common Stock, Value, Issued Accumulated deficit Retained Earnings (Accumulated Deficit) Accumulated other comprehensive loss Accumulated Other Comprehensive Income (Loss), Net of Tax Total shareholders' equity Stockholders' Equity Attributable to Parent Total liabilities and shareholders' equity Liabilities and Equity Deferred Policy Acquisition Costs Disclosures [Abstract] Summary of Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Table Text Block] Debt Securities: Available-for-sale Debt Securities, Amortized Cost Basis [Abstract] Fixed maturity securities, amortized cost Available-for-sale Debt Securities, Amortized Cost Basis Fixed maturity securities, gross unrealized gain Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax Fixed maturity securities, gross unrealized loss Available-for-sale Debt Securities, Accumulated Gross Unrealized Loss, before Tax Fixed maturity securities, estimated fair value Equity Securities Available-for-sale Equity Securities, Amortized Cost Basis [Abstract] Equity securities, amortized cost Available-for-sale Equity Securities, Amortized Cost Basis Equity securities, gross unrealized gain Available-for-sale Equity Securities, Accumulated Gross Unrealized Gain, before Tax Equity securities, gross unrealized loss Available-for-sale Equity Securities, Accumulated Gross Unrealized Loss, before Tax Equity securities, estimated fair value Securities, cost or amortized cost Available-for-sale Securities, Amortized Cost Basis Securities, gross unrealized gain Available-for-sale Securities, Accumulated Gross Unrealized Gain, before Tax Securities, gross unrealized loss Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax Securities, estimated fair value Available-for-sale Securities Proceeds from sale of available for sale securities Proceeds from Sale of Available-for-sale Securities Gain (loss) in fair value of equity securities included in net income Equity Securities, FV-NI, Gain (Loss) Equity Securities, FV-NI, Gain (Loss) Deposits held in trust accounts Deposits, Held In Trust For State Insurance Departments Funds held in trust accounts to meet deposit requirements by state insurance departments. Deposits, held in trust for collateral requirements Deposits, Held In Trust For Collateral Requirements Deposits, Held In Trust For Collateral Requirements Deferred Policy Acquisition Costs Deferred Policy Acquisition Costs [Text Block] Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Fixed maturity securities, amortized cost Equity securities, amortized cost Common stock, shares authorized (in shares) Common Stock, Shares Authorized Common stock, shares issued (in shares) Common Stock, Shares, Issued Common stock, shares outstanding (in shares) Common Stock, Shares, Outstanding Net income (loss) Net Income (Loss) Attributable to Parent Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Award Type [Axis] Award Type [Axis] Equity Award [Domain] Equity Award [Domain] Restricted Stock Units (RSUs) Restricted Stock Units (RSUs) [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 computation of earnings per share (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Plan Name [Axis] Plan Name [Axis] Plan Name [Domain] Plan Name [Domain] 2015 Omnibus Incentive Plan 2015 Omnibus Incentive Plan [Member] Represents the 2015 Omnibus Incentive Plan. Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Shares granted in period Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Stock granted, value Stock Granted, Value, Share-based Compensation, Gross Share-based compensation expense Allocated Share-based Compensation Expense Share-based compensation expense not yet recognized Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized Summary of the Effects of Reinsurance Effects of Reinsurance [Table Text Block] Stockholders' Equity Note [Abstract] Class of Treasury Stock [Table] Class of Treasury Stock [Table] Sale of Stock [Axis] Sale of Stock [Axis] Sale of Stock [Domain] Sale of Stock [Domain] Private placement Private Placement [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Stock Repurchase Program, February 2016 Stock Repurchase Program, February 2016 [Member] Stock Repurchase Program, February 2016 [Member] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common stocks Common Stock [Member] Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Common equity issued Proceeds from Issuance of Private Placement Common equity issued (in shares) Sale of Stock, Number of Shares Issued in Transaction Offering price per share (in dollars per share) Shares Issued, Price Per Share Authorized amount of stock repurchase program Stock Repurchase Program, Authorized Amount Stock repurchased and retired during period, shares Stock Repurchased and Retired During Period, Shares Insurance Loss Reserves [Abstract] Schedule of the Changes in the Reserves for Losses and Loss Adjustment Expense Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Shareholders' Equity Stockholders' Equity Note Disclosure [Text Block] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Gross reserves - beginning of period Less: reinsurance recoverables on unpaid losses Net reserves - beginning of period Liability for Unpaid Claims and Claims Adjustment Expense, Net Add: incurred losses and LAE, net of reinsurance: Current period Current Year Claims and Claims Adjustment Expense Prior period Prior Year Claims and Claims Adjustment Expense Deduct: loss and LAE payments, net of reinsurance: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Current period Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Prior period Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Total net loss and LAE payments Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Net reserves - end of period Plus: reinsurance recoverables on unpaid losses Less: deferred gain on ADC Reinsurance Recoverables, Deferred Gain, Net Of Accretion And Amortization Reinsurance Recoverables, Deferred Gain, Net Of Accretion And Amortization Gross reserves - end of period Accounting Policies [Abstract] Accumulated deficit Retained Earnings [Member] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Adjustments for New Accounting Pronouncements [Axis] Adjustments for New Accounting Pronouncements [Axis] Type of Adoption [Domain] Type of Adoption [Domain] Accounting Standards Update 2016-01 Accounting Standards Update 2016-01 [Member] Number of business classes Number Of Business Classes Number Of Business Classes Number of states in which entity operates Number of States in which Entity Operates Ownership percentage Noncontrolling Interest, Ownership Percentage by Parent Cumulative effect of new accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption Deferred income taxes Deferred Income Tax Expense (Benefit) Cumulative effect of adoption of ASU No. 2018-02, net of taxes Tax Cuts And Jobs Act, Reclassification From AOCI To Retained Earnings, Tax Effect Tax Cuts And Jobs Act, Reclassification From AOCI To Retained Earnings, Tax Effect Liability for Claims and Claims Adjustment Expense [Table] Liability for Claims and Claims Adjustment Expense [Table] Range [Axis] Range [Axis] Range [Domain] Range [Domain] Minimum Minimum [Member] Maximum Maximum [Member] Catastrophic Event [Axis] Catastrophic Event [Axis] Catastrophic Event [Domain] Catastrophic Event [Domain] Hurricane Hurricane [Member] Reinsurance Policy, Type [Axis] Reinsurance Policy, Type [Axis] Reinsurance Policy [Domain] Reinsurance Policy [Domain] Adverse development cover reinsurance agreement (ADC) Adverse Development Cover Reinsurance Agreement [Member] Adverse Development Cover Reinsurance Agreement [Member] Products and Services [Axis] Products and Services [Axis] Products and Services [Domain] Products and Services [Domain] Liability line of business Commercial Lines [Member] The commercial lines segment which offers coverage for property, liability, automobile and other miscellaneous coverage primarily to owner-operated small and mid-sized businesses, professional organizations and hospitality businesses such as restaurant, bars and taverns. Florida homeowners line Homeowners Line [Member] Homeowners Line [Member] Commercial property line Commercial Property Line [Member] Commercial Property Line [Member] Personal automobile line Personal Automobile Line [Member] Product line consisting of insurance policies issued for personal automobile lines. Liability for Claims and Claims Adjustment Expense [Line Items] Liability for Claims and Claims Adjustment Expense [Line Items] ADC loss development cover, maximum amount Reinsurance Retention Policy, Excess Retention, Amount Reinsured Reinsurance retention policy carried reserves threshold Reinsurance Retention Policy, Excess Retention, Carried Reserves, Threshold Reinsurance Retention Policy, Excess Retention, Carried Reserves, Threshold Reinsurance retention policy, co-participation (percentage) Reinsurance Retention Policy, Reinsured Risk, Percentage Increase in reinsurance recoverable Reinsurance Recoverables, Gross Reinsurance recoverable Reinsurance Recoverables, Allowance Deferred gain on ADC Prior-year adverse (favorable) reserve development Offset amount by favorable development Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claim and Claims, Offset Amount Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claim and Claims, Offset Amount Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value, Measurement Inputs, Disclosure [Text Block] Debt Disclosure [Abstract] Debt Long-term Debt [Text Block] Summary of Assets and Liabilities Measured at Fair Value Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] Segment Information Segment Reporting Disclosure [Text Block] Unpaid Losses and Loss Adjustment Expenses Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Stock-based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Reinsurance Reinsurance [Text Block] Schedule of Segment Reporting Information, by Segment [Table] 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] Corporate & Other Corporate, Non-Segment [Member] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Commercial Lines Personal Lines Personal Lines [Member] Personal lines segment which offers coverage for low-value dwelling, wind-exposed homeowners and automobile. Included within personal insurance business are the following key products Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Gross written premiums Premiums Written, Gross Net written premiums Net earned premiums Segment revenue Revenue, Net Segment expenses Costs and Expenses Segment underwriting gain (loss) Operating Income (Loss) Change in fair value of equity securities Interest expense Number of Units Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward] Beginning period, outstanding (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Units vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Units forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Ending period, outstanding (in 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] Beginning period, outstanding (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Units vested (in dollars 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 Units forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Ending period, outstanding (in dollars per share) Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] No Par, Common Stock Senior Debt Obligations [Member] Senior Debt Obligations [Member] Partnership Interest [Member] Partnership Interest [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] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Assets: Assets, Fair Value Disclosure [Abstract] Fixed maturity securities Equity Securities Short-term investments Total marketable investments measured at fair value Investments, Fair Value Disclosure Total investments measured at NAV Alternative Investment, Fair Value Disclosure Total assets measured at fair value Assets, Fair Value Disclosure Liabilities: Liabilities, Fair Value Disclosure [Abstract] Debt Debt Instrument, Fair Value Disclosure Total Liabilities measured at fair value Financial and Nonfinancial Liabilities, Fair Value Disclosure Fair Value, Concentration of Risk [Table] Fair Value, Concentration of Risk [Table] Level 1 Level 2 Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Investment portfolio percentage Investment Portfolio Percentage Represents a percentage of the investment portfolio. Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Schedule of Available-for-sale Securities Schedule of Available-for-sale Securities Reconciliation [Table Text Block] Schedule of Unrealized Loss Positions Schedule of Unrealized Loss on Investments [Table Text Block] Schedule of Investment Income Investment Income [Table Text Block] Schedule of Gross Realized Gains and Losses on Securities Realized Gain (Loss) on Investments [Table Text Block] Summary of Amortized Cost and Fair Value of Securities Investments Classified by Contractual Maturity Date [Table Text Block] Statement of Cash Flows [Abstract] Cash Flows From Operating Activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Net income (loss) Adjustments to reconcile net income (loss) to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Depreciation and amortization Depreciation and amortization of property and equipment, and intangibles The expense recognized in the current period that allocates the cost of property and equipment assets over their useful lives. Also includes the aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. Amortization of bond premium and discount, net Amortization of Debt Discount (Premium) Net realized investment (gains) losses Gain (Loss) on Investments, Excluding Other than Temporary Impairments Change in fair value of equity securities Restricted stock unit expenses Share-based Compensation Other Other Noncash Income (Expense) Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] (Increase) decrease in: Increase (Decrease) in Operating Assets [Abstract] Premiums and agents' balances and other receivables Increase (Decrease) in Premiums Receivable Reinsurance recoverables Increase (Decrease) in Reinsurance Recoverable Prepaid reinsurance premiums Increase (Decrease) in Prepaid Reinsurance Premiums Deferred policy acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Other assets Increase (Decrease) in Other Operating Assets Increase (decrease) in: Increase (Decrease) in Operating Liabilities [Abstract] Unpaid losses and loss adjustment expenses Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Unearned premiums Increase (Decrease) in Unearned Premiums Accounts payable and other liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash provided by (used in) operating activities Net Cash Provided by (Used in) Operating Activities Cash Flows From Investing Activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Purchase of investments Payments to Acquire Investments Proceeds from maturities and redemptions of investments Proceeds from Sale, Maturity and Collection of Investments Proceeds from sales of investments Payments for (Proceeds from) Investments Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Net cash provided by (used in) investing activities Net Cash Provided by (Used in) Investing Activities Cash Flows From Financing Activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Repayment of borrowings under debt arrangements Repayments of Long-term Lines of Credit Net cash provided by (used in) financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash Cash and Cash Equivalents, Period Increase (Decrease) Cash at beginning of period Cash and Cash Equivalents, at Carrying Value Cash at end of period Supplemental Disclosure of Cash Flow Information: Supplemental Cash Flow Information [Abstract] Interest paid Interest Paid Net income taxes paid Income Taxes Paid, Net Receivable (Payable) for securities - non cash item Payable for Securities, Noncash Payable for Securities, Noncash Effects of Reinsurance [Table] Effects of Reinsurance [Table] Effects of Reinsurance [Line Items] Effects of Reinsurance [Line Items] Amount retained (excess of) Reinsurance Retention Policy, Amount Retained Consideration payment Payments for Reinsurance Contingent recovery, percentage Contingent Recovery, Percentage Contingent Recovery, Percentage Reinsurance reinstatement cost Reinsurance Recoverables, Including Reinsurance Premium Paid Equity [Abstract] Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Gross realized gains Available-for-sale Securities, Gross Realized Gains Gross realized losses Available-for-sale Securities, Gross Realized Losses Net realized investment gains Available-for-sale Securities, Gross Realized Gain (Loss) Schedule of Nonvested Restricted Stock Units Activity Schedule of Nonvested Restricted Stock Units Activity [Table Text Block] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Balance at beginning of period Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Other comprehensive income (loss) before reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Less: amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax Cumulative effect of adoption of ASU No. 2016-01, net of taxes Cumulative effect of adoption of ASU No. 2018-02, net of taxes Net current period other comprehensive income (loss) Other Comprehensive Income (Loss), After Reclassifications, Net Of Tax Other Comprehensive Income (Loss), After Reclassifications, Net Of Tax Balance at end of period Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Gross Written Premiums Gross Written Premiums [Member] Represents gross written premiums. Concentration Risk Type [Axis] Concentration Risk Type [Axis] Concentration Risk Type [Domain] Concentration Risk Type [Domain] Geographic Concentration Risk Geographic Concentration Risk [Member] Geographical [Axis] Geographical [Axis] Geographical [Domain] Geographical [Domain] Florida, Michigan, Pennsylvania and Texas Florida, Michigan, Pennsylvania and Texas [Member] Florida, Michigan, Pennsylvania and Texas [Member] Concentration risk Concentration Risk, Percentage Earnings Per Share Earnings Per Share [Text Block] Document And Entity Information Entity Registrant Name Entity Central Index Key Trading Symbol Current Fiscal Year End Date Entity Filer Category Entity Common Stock, Shares Outstanding Document Type Document Period End Date Document Fiscal Year Focus Document Fiscal Period Focus Amendment Flag Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Amortized Cost Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, Fiscal Year Maturity [Abstract] Due in one year or less, amortized cost Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis Due after one year through five years, amortized cost Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis Due after five years through ten years, amortized cost Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis Due after ten years, amortized cost Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis Securities with contractual maturities, amortized cost Available-for-sale Securities, Debt Maturities, Single Maturity Date, Amortized Cost Basis Commercial mortgage and asset-backed, amortized cost Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis Estimated Fair Value Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract] Due in one year or less, fair value Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value Due after one year through five years, fair value Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value Due after five years through ten years, fair value Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value Due after ten years, fair value Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value Securities with contractual maturities, fair value Available-for-sale Securities, Debt Maturities, Single Maturity Date Commercial mortgage and asset-backed, fair value Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value Fixed maturity securities Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Use of Estimates Use of Estimates, Policy [Policy Text Block] Recently Issued Accounting Guidance New Accounting Pronouncements, Policy [Policy Text Block] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Variable Rate Period [Axis] Variable Rate Period [Axis] Variable Rate Period [Axis] Variable rate period Variable Rate Period [Domain] [Domain] for Variable Rate Period [Axis] Fifth Anniversary Period One [Member] Period One [Member] 10th Anniversary Period Two [Member] Period Two [Member] Variable Rate [Axis] Variable Rate [Axis] Variable Rate [Domain] Variable Rate [Domain] Swap rate Federal Funds Effective Swap Rate [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Private placement, subordinated note Private Placement Subordinated Note [Member] Private Placement Subordinated Note [Member] Term Note Term Note [Member] Debt instrument classified as term note. 2014 Term Note 2014 Term Note [Member] Debt instrument classified as 2014 term note. Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Subordinated debt Subordinated Debt [Member] Secured debt Secured Debt [Member] Credit Facility [Axis] Credit Facility [Axis] Credit Facility [Domain] Credit Facility [Domain] Revolver Revolving Credit Facility [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Face amount of debt instrument Debt Instrument, Face Amount Bearing fixed annual interest rate (percentage) Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate Derivative, basis spread on variable rate Derivative, Basis Spread on Variable Rate Debt issuance costs Debt Issuance Costs, Gross Carrying value Number of debt instruments Debt Instrument, Number of Instruments Debt Instrument, Number of Instruments Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Outstanding balance on credit facility, repayment Repayments of Lines of Credit Statement of Stockholders' Equity [Abstract] Statement [Table] Statement [Table] Statement [Line Items] Statement [Line Items] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Balance at beginning of period (in shares) Shares, Outstanding Restricted stock unit expense, net (in shares) Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures Restricted stock unit expense, net Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Other comprehensive loss Issuance of common stock in private placement (in shares) Stock Issued During Period, Shares, New Issues Issuance of common stock in private placement Stock Issued During Period, Value, New Issues Common stock issuance costs Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Balance at end of period (in shares) Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] Balance at beginning of period Deferred policy acquisition costs Deferred Policy Acquisition Costs, Additions Amortization of policy acquisition costs Net change Deferred Policy Acquisition Costs, Period Increase (Decrease) Balance at end of period