Title of Individual [Axis]
Title of Individual [Axis]
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
Payments of debt issuance/modification costs
Payments of Debt Issuance Costs
(Gain) loss 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
Investments
Investment, Policy [Policy Text Block]
Significant Unobservable Inputs (Level 3)
Fair Value, Inputs, Level 3 [Member]
Borrowings outstanding
Long-term Line of Credit
Proceeds from redemptions, maturities and sale of fixed-maturity investments, available-for-sale
Proceeds from Sale and Maturity of Debt Securities, Available-for-sale
Share-based compensation expense
APIC, Share-based Payment Arrangement, Increase for Cost Recognition
2023
Long-term Debt, Maturities, Repayments of Principal in Year Four
Loan-to-value ratio (less than)
Loans In Pool, Loan To Value Ratio
Loans In Pool, Loan To Value Ratio
Gain from change in fair value of warrant liability
Gain From Change in Fair Value of Warrant Liability
Gain From Change in Fair Value of Warrant Liability
OTTI loss in earnings
Other than Temporary Impairment Losses, Investments
Reconciliation of Liability for Insurance Claims and Claim Expenses
Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block]
Other comprehensive (loss) income, net of tax:
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract]
2015 Term Loan
2015 Term Loan [Member]
2015 Term Loan
Recent Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Reclassification adjustment for realized losses (gains) included in net income, tax expense (benefit)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax
Current Fiscal Year End Date
Current Fiscal Year End Date
Total revenues
Revenues
Claims and claim expenses incurred:
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract]
Diluted (in shares)
Dilutive weighted average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Schedule of Fair Values and Gross Unrealized Gains and Losses
Debt Securities, Available-for-sale [Table Text Block]
Credit facility borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Number of covered claims included in number of claims paid
Liability for Paid Claims and Claims Adjustment Expense, Number of Covered Claims Included In Number of Paid Claims
Liability for Paid Claims and Claims Adjustment Expense, Number of Covered Claims Included In Number of Paid Claims
Unamortized issuance costs and original issue discount
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Software and equipment, net
Property, Plant and Equipment, Net
Accrued investment income
Accrued Investment Income Receivable
Statutory Accounting Practices [Table]
Statutory Accounting Practices [Table]
London Interbank Offered Rate (LIBOR)
London Interbank Offered Rate (LIBOR) [Member]
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Basis spread on variable rate (percent)
Debt Instrument, Basis Spread on Variable Rate
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale [Line Items]
Total assets
Assets
Entity Shell Company
Entity Shell Company
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table]
Cover page.
Cover [Abstract]
Total bonds
Bonds [Member]
Document Type
Document Type
Roll-Forward of Level 3 Liabilities Measured at Fair Value
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]
Gross Unrealized Losses
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax
Subsequent Event
Subsequent Event [Member]
Favorable prior year development
Prior years
Prior Year Claims and Claims Adjustment Expense
Variable Rate [Domain]
Variable Rate [Domain]
Repayments of term loan
Repayments of Long-term Debt
Current First Layer Retained Loss
Current First Layer Retained Loss
Current First Layer Retained Loss
Utilities
Utilities, Industry Group [Member]
Utilities, Industry Group [Member]
Change in fair value of warrant liability in current period
Class Of Warrant Or Right, Change In Fair Value Of Warrant Liability In Current Period
Class Of Warrant Or Right, Change In Fair Value Of Warrant Liability In Current Period
Credit Facility [Axis]
Credit Facility [Axis]
Component of claims paid covered under QSR Transaction
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Including Amounts Covered By Insurance, Amount Under QSR Transaction
Component of total amount of payments to settle insured claims and pay costs incurred in the claims settlement process, including amount covered by insurance, covered under QSR transaction.
Deferred policy acquisition costs, net
Increase (Decrease) in Deferred Policy Acquisition Costs
Unrealized loss position, 12 months or greater
Unrealized losses, 12 months or greater
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
Financial Instrument [Axis]
Financial Instrument [Axis]
Variable rate floor (percent)
Debt Instrument, Variable Interest Rate Floor
Debt Instrument, Variable Interest Rate Floor
Document Quarterly Report
Document Quarterly Report
Commitments and contingencies
Commitments and Contingencies
Long-term Debt, Type [Domain]
Long-term Debt, Type [Domain]
Ceded Credit Risk, Reinsurer [Axis]
Ceded Credit Risk, Reinsurer [Axis]
Cash and cash equivalents (including restricted cash of $2,505 and $2,662 as of March 31, 2020 and December 31, 2019, respectively)
Cash, cash equivalents and restricted cash, beginning of period
Cash, cash equivalents and restricted cash, end of period
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Exercise price of warrants (in dollars per warrant)
Class of Warrant or Right, Exercise Price of Warrants or Rights
Roll-forward of Level 3 liabilities:
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Due in one year or less
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value
Underwriting and operating expenses
Other Cost and Expense, Operating
Entity File Number
Entity File Number
Unearned premiums
Increase (Decrease) in Unearned Premiums
Earnings per share
Earnings Per Share, Basic and Diluted [Abstract]
Total claims and claim expenses paid
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid
Reinsurance
Reinsurance [Text Block]
Percent of premiums ceded under QSR Transaction
Percent of pool RIF reinsured
Reinsurance Retention Policy, Reinsured Risk, Percentage
Intangible assets and goodwill
Intangible Assets, Net (Including Goodwill)
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table]
Schedule of Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits, by Title of Individual and by Type of Deferred Compensation [Table]
Accrued investment income
Increase (Decrease) in Accrued Investment Income Receivable
Document Fiscal Period Focus
Document Fiscal Period Focus
Statutory surplus
Statutory Accounting Practices, Statutory Capital and Surplus, Balance
Financial Instruments [Domain]
Financial Instruments [Domain]
Other comprehensive (loss) income, net of tax
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent
Reclassification adjustment for realized losses included in net income, net of tax (benefit) of ($15) and ($39) for the quarters ended March 31, 2020 and 2019, respectively
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax
Insurance [Abstract]
Insurance [Abstract]
Claims applied to pool 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
Secured Debt
Secured Debt [Member]
Purchase of short-term investments
Payments to Acquire Short-term Investments
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Statement [Line Items]
Statement [Line Items]
Energy
Energy, Industry Group [Member]
Energy, Industry Group [Member]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Basic (in dollars per share)
Basic earnings per share (in dollars per share)
Earnings Per Share, Basic
Ceded Credit Risk, Reinsurer [Domain]
Ceded Credit Risk, Reinsurer [Domain]
Earnings Per Share
Earnings Per Share, Policy [Policy Text Block]
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Subsequent Event Type [Axis]
Subsequent Event Type [Axis]
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Amendment Flag
Amendment Flag
Claims paid, including amounts covered by insurance
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Including Amounts Covered By Insurance
Amount of payments to settle insured claims and pay costs incurred in the claims settlement process, including amount covered by insurance.
Due after five through ten years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices [Line Items]
Common stock, outstanding (in shares)
Common Stock, Shares, Outstanding
Fixed maturities, available-for-sale, amortized cost
Amortized Cost
Debt Securities, Available-for-sale, Amortized Cost
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Inputs, Level 1 [Member]
Number of securities, less than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions
Interest expense
Interest Expense
Liability for Claims and Claims Adjustment Expense [Table]
Liability for Claims and Claims Adjustment Expense [Table]
Reserve for insurance claims and claim expenses
Total gross liability for unpaid claims and claim adjustment expenses
Beginning balance
Ending balance
Liability for Claims and Claims Adjustment Expense
Fair value
Debt Securities, Available-for-sale, Unrealized Loss Position
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
Fannie Mae
Eligible Policies, Pool Two [Member]
Eligible Policies, Pool Two [Member]
NMIC and Re One Combined
NMic and Re one Combined [Member]
NMic and Re one Combined [Member]
Local Phone Number
Local Phone Number
Ceding commission earned
Reinsurance Ceding Commission Earned
Reinsurance Ceding Commission Earned
Expected volatility
Measurement Input, Option Volatility [Member]
Liability Class [Axis]
Liability Class [Axis]
Prepaid expenses
Prepaid Expense
Depreciation and amortization
Depreciation, Amortization and Accretion, Net
2018 Term Loan
Senior Secured Term Loan 2018 [Member]
Senior Secured Term Loan 2018 [Member]
Future Principal Payments [Abstract]
Long-term Debt, Fiscal Year Maturity [Abstract]
Key Inputs and Assumptions, Valuation Techniques
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Additional paid-in capital
Additional Paid in Capital
(Gain) loss from change in fair value of warrant liability
Fair Value Adjustment of Warrants
Other assets
Other Assets
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.
Reinsurance coverage amount amortized (as a percent)
Reinsurance Agreement, Optional Termination Right, Percent Of Reinsurance Coverage Threshold
Reinsurance Agreement, Optional Termination Right, Percent Of Reinsurance Coverage Threshold
Comprehensive income:
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Entity Current Reporting Status
Entity Current Reporting Status
Net increase in cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Net income
Net income
Net income
Net Income (Loss) Attributable to Parent
Short-term investments
Short-term Investments [Member]
Common Stock - Class A
Common Stock [Member]
Schedule of Net Realized Investment Gains (Losses)
Realized Gain (Loss) on Investments [Table Text Block]
Debt Instrument [Axis]
Debt Instrument [Axis]
Amortization of debt discount and debt issuance costs
Amortization of Debt Issuance Costs and Discounts
Net investment income
Investment Income, Net
Earnings per Share, Diluted [Abstract]
Net Income (Loss) Available to Common Stockholders, Operations, Diluted [Abstract]
Entity Small Business
Entity Small Business
Amortized Cost
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Amortized Cost [Abstract]
Entity Filer Category
Entity Filer Category
Statutory net gain (loss)
Statutory Accounting Practices, Statutory Net Income Amount
2018 ILN Transaction
2018 ILN [Member]
2018 ILN [Member]
Total liabilities and shareholders' equity
Liabilities and Equity
Common stock: class A shares issued related to warrants (in shares)
Stock issued upon exercise of warrants (in shares)
Stock Issued During Period, Shares, Conversion of Convertible Securities
Entity Address, City or Town
Entity Address, City or Town
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
2020 Revolving Credit Facility
Secured Revolving Credit Facility 2020 [Member]
Secured Revolving Credit Facility 2020
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Debt Securities By Industry [Axis]
Debt Securities By Industry [Axis]
Debt Securities By Industry [Axis]
Corporate debt securities
Corporate Debt Securities [Member]
Shareholders' equity
Stockholders' Equity Attributable to Parent [Abstract]
Document Fiscal Year Focus
Document Fiscal Year Focus
Subsequent Event
Subsequent Events [Text Block]
Revenues
Revenues [Abstract]
Anticipated payment related to annual operating expenses
Anticipated Operating Expense Payments, Annual
Amount of anticipated payments related to operating expenses of counterparty.
Net realized investment losses
Net realized investment (losses)
Debt Securities, Available-for-sale, Realized Gain (Loss)
Accounts payable and accrued expenses
Accounts Payable and Accrued Liabilities
Warrants issued (in shares)
Class of Warrant or Right, Number of Securities Called by Warrants or Rights
Recurring
Fair Value, Recurring [Member]
Corporate debt securities as component of total (percent)
Debt Securities, Corporate, Component Of Total. Percentage
Debt Securities, Corporate, Component Of Total. Percentage
Service expenses
Other Nonoperating Expense
ILN Transactions
ILN Transactions [Member]
ILN Transactions [Member]
Subsequent Events [Abstract]
Schedule of Components of Net Investment Income
Investment Income [Table Text Block]
Expenses
Costs and Expenses [Abstract]
Warrants
Line of Credit and Related Warrants [Text Block]
Line of Credit and Related Warrants [Text Block]
Accumulated other comprehensive income, net of tax
Accumulated Other Comprehensive Income (Loss), Net of Tax
Reinsurance Policy [Domain]
Reinsurance Policy [Domain]
Diluted net income
Net Income (Loss) Attributable to Parent, Diluted
Retained Earnings
Retained Earnings [Member]
Premiums receivable
Premiums Receivable, Net
Subsequent Event Type [Domain]
Subsequent Event Type [Domain]
Prior years
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years
Interest expense from amortization of debt issuance costs
Amortization of Debt Issuance Costs
Subsequent Event [Line Items]
Subsequent Event [Line Items]
Frequency of periodic payment
Debt Instrument, Frequency of Periodic Payment
Risk free interest rate
Measurement Input, Risk Free Interest Rate [Member]
Schedule of ILN Transactions
Schedule of respective coverages and retentions of the ILN transactions [Table Text Block]
Schedule of respective coverages and retentions of the ILN transactions [Table Text Block]
Liabilities
Liabilities [Abstract]
Document Period End Date
Document Period End Date
Statement [Table]
Statement [Table]
Weighted average common shares outstanding
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Entity Registrant Name
Entity Registrant Name
Purchase of fixed-maturity investments, available-for-sale
Payments to Acquire Debt Securities, Available-for-sale
Cash flows from investing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Premiums Receivable
Premiums Receivable, Basis of Accounting, Policy [Policy Text Block]
Maximum
Maximum [Member]
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
Initial First Layer Retained Loss
Initial First Layer Retained Loss
Initial First Layer Retained Loss
Consumer
Consumer, Industry Group [Member]
Consumer, Industry Group [Member]
Measurement Input Type [Domain]
Measurement Input Type [Domain]
Reserve for insurance claims and claim expenses
Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve
Right to purchase, number of shares per warrant (in shares)
Number Of Shares, Right To Purchase Per Warrant
Number Of Shares, Right To Purchase Per Warrant
Net premiums earned
Net premiums earned
Premiums Earned, Net
Deductible on policy
Mortgage Pool Insurance, Claim Deductible
Mortgage Pool Insurance, Claim Deductible
Schedule of Fair Value Measurements of Financial Instruments
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
Warrant liability, at fair value
Warrants and Rights Outstanding
Fixed maturities, available-for-sale, at fair value (amortized cost of $1,059,143 and $1,113,779 as of March 31, 2020 and December 31, 2019, respectively)
Fair Value
Fair Value
Fair value of securities
Debt Securities, Available-for-sale
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
Change in unrealized investment gains/losses, tax expense (benefit)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Tax
Risk premiums paid
Reinsurance Retention, Risk Premiums Paid
Reinsurance Retention, Risk Premiums Paid
Due in one year or less
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost
Retained earnings
Retained Earnings (Accumulated Deficit)
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Other revenues
Other Income
Entity Tax Identification Number
Entity Tax Identification Number
Debt instrument face amount
Debt Instrument, Face Amount
Diluted (in dollars per share)
Diluted earnings per share (in dollars per share)
Earnings Per Share, Diluted
Unrealized (losses) gains in accumulated other comprehensive income, net of tax (benefit) expense of ($3,424) and $3,953 for the quarters ended March 31, 2020 and 2019, respectively
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, after Tax
Trading Symbol
Trading Symbol
Minimum
Minimum [Member]
Technology
Technology, Industry Group [Member]
Technology, Industry Group [Member]
Reinsurance Policy, Type [Axis]
Reinsurance Policy, Type [Axis]
Issuance of common stock on warrant exercise
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements
Investments, Debt and Equity Securities [Abstract]
Investments, Debt and Equity Securities [Abstract]
Reinsurance Disclosures [Abstract]
Reinsurance Disclosures [Abstract]
Debt instrument term (years)
Debt Instrument, Term
Industrial
Industrial, Industry Group [Member]
Industrial, Industry Group [Member]
Legal Entity [Axis]
Legal Entity [Axis]
2018 Revolving Credit Facility
Secured Revolving Credit Facility 2018 [Member]
Secured Revolving Credit Facility 2018 [Member]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Expected life
Measurement Input, Expected Term [Member]
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Percent of premiums earned under 2018 QSR Transaction
Premiums Earned, Percent Of Risk
Premiums Earned, Percent Of Risk
Net cash (used in) financing activities
Net Cash Provided by (Used in) Financing Activities
Entity [Domain]
Entity [Domain]
Income tax expense
Income Tax Expense (Benefit)
Due after ten years
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost
Net unrealized (losses) gains in accumulated other comprehensive income, tax (benefit) expense
Other Comprehensive Income (Loss), Securities, Available-for-Sale, Unrealized Holding Gain (Loss) Arising During Period, Tax
Eligible Policies, Pool One
Eligible Policies, Pool One [Member]
Eligible Policies, Pool One [Member]
City Area Code
City Area Code
Commitment fee (percent)
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Net premiums written
Premiums Written, Net
Other liabilities
Other Liabilities
Claims and claim expenses paid:
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract]
Other assets
Increase (Decrease) in Prepaid Expense and Other Assets
Title of 12(b) Security
Title of 12(b) Security
Net premiums written
Premiums Written, Net [Abstract]
Prepaid expenses
Increase (Decrease) in Prepaid Expense
Warrant liability, measurement input
Warrants and Rights Outstanding, Measurement Input
Total assets
Assets, Fair Value Disclosure
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Counterparty Name [Axis]
Counterparty Name [Axis]
Schedule of Key Inputs and Assumptions in Option-Pricing Model
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Asset-backed securities
Asset-backed Securities [Member]
Interest rate during period (percent)
Debt Instrument, Interest Rate During Period
Number of securities, total
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions
Term loan
Total
Long-term Debt, Gross
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Proceeds from maturity of short-term investments
Proceeds from Sale of Short-term Investments
Assets
Assets [Abstract]
Gross Unrealized Gains
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax
Reserves for Insurance Claims and Claim Expenses
Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]
Beginning balance (in shares)
Ending balance (in shares)
Shares, Outstanding
RTC ratio
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).
Cash flows from operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Investments
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Debt Securities By Industry [Line Items]
Debt Securities By Industry [Line Items]
Debt Securities By Industry [Line Items]
Third-Party Reinsurers
Third-Party Reinsurers [Member]
Third-Party Reinsurers [Member]
Warrants exercised (in shares)
Class of Warrant or Right, Number of Warrants Exercised During Period
Class of Warrant or Right, Number of Warrants Exercised During Period
Dilutive effect of issuable shares (in shares)
Weighted Average Number Diluted Shares Outstanding Adjustment
Due after one through five years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value
Ceded
Ceded premiums earned
Ceded Premiums Earned
Reinsurance funds withheld
Funds Held under Reinsurance Agreements, Liability
Investment expenses
Investment Income, Investment Expense
Warrant liability, expected life
Warrants and Rights Outstanding, Term
Deferred policy acquisition costs, net
Deferred Policy Acquisition Cost
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Net premiums earned
Premiums Earned, Net [Abstract]
Schedule of Future Principal Payments
Schedule of Maturities of Long-term Debt [Table Text Block]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Supplemental disclosures of cash flow information
Supplemental Cash Flow Information [Abstract]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]
Prepaid reinsurance premiums
Prepaid Reinsurance Premiums
Changes in operating assets and liabilities:
Increase (Decrease) in Other Operating Assets and Liabilities, Net [Abstract]
Fair value, 12 months or greater
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer
Basis of Presentation
Basis of Accounting, Policy [Policy Text Block]
Regulatory Information
Insurance Disclosure [Text Block]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Ceded claims and claim expenses
Reinsurance Ceded Claims and Claims Expenses
Reinsurance Ceded Claims and Claims Expenses
Reinsurance recoverable on loss reserve
Reinsurance recoverable on unpaid claims
Less reinsurance recoverables
Add reinsurance recoverables
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
2022
Long-term Debt, Maturities, Repayments of Principal in Year Three
Income taxes refunded
Income Taxes Paid, Net
Beginning balance, net of reinsurance recoverables
Reserve at end of period, net of reinsurance recoverables
Liability for Unpaid Claims and Claims Adjustment Expense, Net
Debt
Debt Disclosure [Text Block]
Reinsurance coverage, term of underlying mortgage amortization (in years)
Reinsurance Retention Policy, Term Of Underlying Mortgage Amortization
Reinsurance Retention Policy, Term Of Underlying Mortgage Amortization
Warrant liability
Warrant Liability
Warrant Liability
Organization, Basis of Presentation and Summary of Accounting Principles
Business Description and Basis of Presentation [Text Block]
Common stock, authorized (in shares)
Common Stock, Shares Authorized
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Restricted cash
Restricted Cash
2017 ILN Transaction
Two Thousand Seventeen ILN Transaction [Member]
Two Thousand Seventeen ILN Transaction [Member]
Entity Central Index Key
Entity Central Index Key
Entity Emerging Growth Company
Entity Emerging Growth Company
Senior debt
Senior Notes [Member]
2018 ILN Transaction
Two Thousand Eighteen ILN Transaction [Member]
Two Thousand Eighteen ILN Transaction [Member]
Share-based compensation expense
Share-based Payment Arrangement, Noncash Expense
Schedule of Earnings per Share, Basic and Diluted
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Gross realized investment gains
Debt Securities, Available-for-sale, Realized Gain
Credit Facility [Domain]
Credit Facility [Domain]
Beginning balance
Ending balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value
Tax and loss bonds
Tax And Loss Bond
Tax And Loss Bond
Base Rate
Base Rate [Member]
Significant Other Observable Inputs (Level 2)
Fair Value, Inputs, Level 2 [Member]
Income Taxes
Income Tax Disclosure [Text Block]
Ceded
Ceded Premiums Written
Total claims and claim expenses incurred
Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims
2017 ILN Transaction
2017 ILN [Member]
2017 ILN [Member]
Insurance claims and claim expenses
Policyholder Benefits and Claims Incurred, Net, Property, Casualty and Liability
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Remaining deferred issuance costs, net of accumulated amortization
Debt Issuance Costs, Line of Credit Arrangements, Net
Warrant liability
Warrant [Member]
Measurement Input Type [Axis]
Measurement Input Type [Axis]
Common stock price
Measurement Input, Share Price [Member]
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
Ceding commissions under 2016 QSR Transaction
Ceded Credit Risk, Commission Earned, Percentage
Ceded Credit Risk, Commission Earned, Percentage
Unusual or Infrequent Items, or Both [Abstract]
Cash flows from financing activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Due after five through ten years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Term loan
Long-term Debt
Number of states in which the entity operates
Number of States in which Entity Operates
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Software and equipment
Payments to Acquire Property, Plant, and Equipment
Commitment fees in interest expense
Line of Credit Facility, Commitment Fee Amount
Current year
Current Year Claims and Claims Adjustment Expense
Risk Written Policies in 2019
Eligible Policies, Pool Five [Member]
Eligible Policies, Pool Five [Member]
Investment income
Investment Income, Interest and Dividend
Number of securities,12 months or greater
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Number of Positions
Threshold for loss ratio on loans 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
Previously ceded primary RIF recaptured
Previously Ceded Primary Risk-In-Force Recaptured
Previously Ceded Primary Risk-In-Force Recaptured
Accrued interest receivable
Interest Receivable
Asset-backed securities
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost
QSR Transactions
QSR Transactions [Member]
QSR Transactions [Member]
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Axis]
Subsequent Event [Table]
Subsequent Event [Table]
Additional Paid-in Capital
Additional Paid-in Capital [Member]
Title of Individual [Domain]
Title of Individual [Domain]
Schedule of Statutory Net Income (Loss), Surplus, Contingency Reserve and Risk-to-Capital Ratio
Statutory Accounting Practices Disclosure [Table Text Block]
Gross realized investment losses
Debt Securities, Available-for-sale, Realized Loss
Deferred tax liability, net
Deferred Income Tax Liabilities, Net
Ceded risk-in-force
Risk In Force, Ceded
Risk In Force, Ceded
Due after ten years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value
Unearned premiums
Unearned Premiums
Valuation Approach and Technique [Domain]
Valuation Approach and Technique [Domain]
2021
Long-term Debt, Maturities, Repayments of Principal in Year Two
Entity Address, Address Line One
Entity Address, Address Line One
Entity Address, State or Province
Entity Address, State or Province
Total liabilities
Financial and Nonfinancial Liabilities, Fair Value Disclosure
Schedule of Investments by Maturity
Investments Classified by Contractual Maturity Date [Table Text Block]
Unrealized losses, less than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Net cash provided by used in investing activities
Net Cash Provided by (Used in) Investing Activities
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
Fair Value, Recurring and Nonrecurring [Table]
Fair Value, Recurring and Nonrecurring [Table]
Cash and investments held with various state insurance departments
Cash, Cash Equivalents, and Short-term Investments
Schedule of Investments by Industry Group
Investments Classified By Issuer Industry Group [Table Text Block]
Investments Classified By Issuer Industry Group [Table Text Block]
Ceded Credit Risk [Table]
Ceded Credit Risk [Table]
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
Entity Interactive Data Current
Entity Interactive Data Current
Change in unrealized investment gains/losses, net of tax benefit/expense
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax
Common stock, issued (in shares)
Common Stock, Shares, Issued
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Total expenses
Costs and Expenses
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Number of claims paid
Liability for Paid Claims and Claims Adjustment Expense, Number of Paid Claims
Liability for Paid Claims and Claims Adjustment Expense, Number of Paid Claims
Taxes paid related to net share settlement of equity awards
Payment, Tax Withholding, Share-based Payment Arrangement
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Direct
Direct Premiums Written
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Earnings per Share (EPS)
Earnings Per Share [Text Block]
Revolving Credit Facility
Revolving Credit Facility [Member]
COVID-19 Developments and Coronavirus Aid, Relief, and Economic Security (CARES) Act
Unusual or Infrequent Items, or Both, Disclosure [Text Block]
Fair value of warrant liability reclassified to additional paid in capital upon exercise
Class Of Warrant Or Right, Fair Value Of Warrant Liability Reclassified To Additional Paid In Capital Upon Exercise
Class Of Warrant Or Right, Fair Value Of Warrant Liability Reclassified To Additional Paid In Capital Upon Exercise
Municipal debt securities
US States and Political Subdivisions Debt Securities [Member]
Premiums receivable
Increase (Decrease) in Premiums Receivable
Communications
Communications, Industry Group [Member]
Communications, Industry Group [Member]
Effective income tax rate on pre-tax income or loss
Effective Income Tax Rate Reconciliation, Percent
Debt Securities, Available-for-sale [Table]
Debt Securities, Available-for-sale [Table]
Periodic payment of principal
Debt Instrument, Periodic Payment, Principal
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 liabilities
Liabilities
Dividend yield
Measurement Input, Expected Dividend Rate [Member]
Deferred income taxes
Deferred Income Taxes and Tax Credits
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 Claims and Claims Adjustment Expense [Line Items]
Liability for Claims and Claims Adjustment Expense [Line Items]
2020
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year
Counterparty Name [Domain]
Counterparty Name [Domain]
Proceeds from issuance of common stock related to employee equity plans
Proceeds, Issuance of Shares, Share-based Payment Arrangement, Including Option Exercised
Earnings per Share, Basic [Abstract]
Net Income (Loss) Available to Common Stockholders, Operations, Basic [Abstract]
Asset-backed securities
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value
Fannie Mae
Fannie Mae [Member]
Fannie Mae [Member]
Fair value, less than 12 months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months
Basic (in shares)
Basic weighted average shares outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Equity Components [Axis]
Equity Components [Axis]
Valuation Technique, Option Pricing Model
Valuation Technique, Option Pricing Model [Member]
Net realized investment losses
Gain (Loss) on Investments
Total shareholders' equity
Beginning balance
Ending balance
Stockholders' Equity Attributable to Parent
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
Debt Securities By Industry [Domain]
Debt Securities By Industry [Domain]
[Domain] for Debt Securities By Industry [Axis]
Schedule of Aging Unrealized Losses
Schedule of Unrealized Loss on Investments [Table Text Block]
Net amortization of premium on investment securities
Accretion (Amortization) of Discounts and Premiums, Investments
Current Reinsurance Coverage
Current Reinsurance Coverage
Current Reinsurance Coverage
Ceded Credit Risk [Line Items]
Ceded Credit Risk [Line Items]
Unrealized loss position, accumulated loss
Unrealized Losses
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss
Fair Value of Financial Instruments
Fair Value Disclosures [Text Block]
Reinsurance
Reinsurance Accounting Policy [Policy Text Block]
Direct
Direct Premiums Earned
Common stock: class A shares issued related to warrant exercises
Stock Issued During Period, Value, Conversion of Convertible Securities
Interest paid
Interest Paid, Excluding Capitalized Interest, Operating Activities
Eurodollar
Eurodollar [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Cash, cash equivalents and short-term investments
Cash and Cash Equivalents, Fair Value Disclosure
Security Exchange Name
Security Exchange Name
Reinsurance balances, net
Increase (Decrease) in Reinsurance Assets and Liabilities
Increase (Decrease) in Reinsurance Assets and Liabilities
Aggregate dividend capacity
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments
Anti-dilutive shares (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Long-term Debt, Type [Axis]
Long-term Debt, Type [Axis]
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Equity Component [Domain]
Equity Component [Domain]
Document Transition Report
Document Transition Report
Initial Reinsurance Coverage
Initial Reinsurance Coverage
Initial Reinsurance Coverage
Financial
Financial, Industry Group [Member]
Financial, Industry Group [Member]
Common stock - class A shares, $0.01 par value; 68,873,540 and 68,358,074 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively (250,000,000 shares authorized)
Common Stock, Value, Outstanding
2018 QSR Transaction
Two Thousand Eighteen QSR Transaction [Member]
Two Thousand Eighteen QSR Transaction [Member]
Fair Value
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Fair Value [Abstract]
Current year
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year
Debt issuance costs
Debt Issuance Costs, Gross
Profit commission
Reinsurance Profit Commission
Reinsurance Profit Commission
Risk Written Policies in 2018
Eligible Policies, Pool Four [Member]
Eligible Policies, Pool Four [Member]
U.S. Treasury securities and obligations of U.S. government agencies
U.S. Treasury securities and obligations of U.S. government agencies
US Treasury and Government [Member]
2016 QSR Transaction
Two Thousand Sixteen QSR Transaction [Member]
Two Thousand Sixteen QSR Transaction [Member]
Schedule of Effects of Reinsurance
Effects of Reinsurance [Table Text Block]
Due after one through five years
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost
Effects of Reinsurance [Table]
Effects of Reinsurance [Table]
2019 ILN Transaction
2019 ILN [Member]
2019 ILN [Member]
Income Statement [Abstract]
Income Statement [Abstract]
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
Net investment income
Net Investment Income
Effects of Reinsurance [Line Items]
Effects of Reinsurance [Line Items]
Investment Income, Net [Abstract]
Investment Income, Net [Abstract]