Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract] Statutory Accounting Practices, Statutory Amount Available for Dividend Payments [Abstract] Due after 1 but within 5 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Amortized Cost Indemnifications related to contract underwriting services Indemnification Agreement [Member] Changes in Stockholders' Equity Increase (Decrease) in Stockholders' Equity [Roll Forward] Statutory net income Statutory Accounting Practices, Statutory Net Income Amount Amount outstanding, gross Long-Term Debt, Gross ILN 2015 & 2016 Radnor Re 2019-2 Ltd. [Member] Radnor Re 2019-2 Ltd. [Member] Schedule of Fair Value of Investments in an Unrealized Loss Position and Related Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block] Maximum Exposure to Loss, Off - Balance Sheet Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Off The Balance Sheet Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Off The Balance Sheet Entity Address, Postal Zip Code Entity Address, Postal Zip Code Reserve rate Risk In Force, Reserve Percentage Risk In Force, Reserve Percentage Investment Secondary Categorization [Axis] Investment Secondary Categorization [Axis] Change in unrealized appreciation (depreciation) of investments, net of tax expense (benefit) of ($22,000) and ($8,599) in the three months ended September 30, 2022 and 2021 and ($82,132) and ($10,944) in the nine months ended September 30, 2022 and 2021 Other Comprehensive Income (Loss), Available-for-Sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Schedule of Reconciliation of Beginning and Ending Reserve Balances for Losses and Loss Adjustment Expenses (LAE) Schedule of Liability for Unpaid Claims and Claims Adjustment Expense [Table Text Block] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Debt Instrument [Axis] Debt Instrument [Axis] Dividends paid Payments of Ordinary Dividends, Common Stock Credit facility, maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Losses and expenses: Benefits, Losses and Expenses [Abstract] Due after 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Fair Value Fair Value Debt Securities Available For Sale Continuous Unrealized Loss Position [Abstract] Debt Securities Available For Sale Continuous Unrealized Loss Position [Abstract] Reserve for losses and LAE Reserve for losses and LAE at beginning of period Reserve for losses and LAE at end of period Liability for Claims and Claims Adjustment Expense Investing Activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Financial Instruments [Domain] Financial Instruments [Domain] Statistical Measurement [Domain] Statistical Measurement [Domain] Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] Mortgage Insurance Linked Notes Mortgage Insurance Linked Notes [Member] Mortgage Insurance Linked Notes [Member] Additional paid-in capital Additional Paid in Capital, Common Stock Dilutive effect of nonvested shares (in shares) Incremental Common Shares Attributable to Dilutive Effect of Nonvested Shares with Forfeitable Dividends Due in 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value 2021 Performance based share awards Two Thousand Twenty One Performance-Based Grants [Member] Two Thousand Twenty One Performance-Based Grants Income tax payments Income Taxes Paid Treasury stock acquired Shares acquired and cancelled Treasury Stock, Value, Acquired, Cost Method Net income Net income Net Income (Loss) Attributable to Parent Consumer, non-cyclical Consumer, Non-cyclical Sector [Member] Consumer, Non-cyclical Sector [Member] Antidilutive nonvested shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Maximum Exposure to Loss, On - Balance Sheet Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount On The Balance Sheet Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount On The Balance Sheet Radnor Re 2022-1 Ltd. Radnor Re 2022-1 [Member] Radnor Re 2022-1 Subsequent Event Type [Axis] Subsequent Event Type [Axis] Written From October 1 Through December 31, 2022 Coverage Period One [Member] Coverage Period One Share Repurchase Program [Domain] Share Repurchase Program [Domain] Number of states in which the entity is licensed to write mortgage insurance Number of States in which Entity Operates Other underwriting and operating expenses Other Underwriting and Operating Expenses Represents the aggregate amount of costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with, and are not primarily related to the acquisition or renewal of insurance contracts and other operating costs, that are associated with the entity's normal revenue producing operation. Net investment income Net investment income Net Investment Income Equity Component [Domain] Equity Component [Domain] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Scenario [Axis] Scenario [Axis] Term Loan Secured Debt [Member] Total assets at fair value Assets, Fair Value Disclosure Reconciliation of the beginning and ending reserve balances for losses and loss adjustment expenses (LAE) Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Incentive program bonus award fiscal year performance Incentive Program Bonus Award Fiscal Year Performance [Member] Represents an incentive program covering bonus awards based on performance for previous fiscal year. Vesting (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Related Party [Domain] Related Party [Domain] Incremental compensation expense Share-Based Payment Arrangement, Plan Modification, Incremental Cost Plan Name [Axis] Plan Name [Axis] Total investments available for sale Fair Value Fair Value Debt Securities, Available-for-Sale Supplemental Disclosure of Cash Flow Information Supplemental Cash Flow Information [Abstract] Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Plan Name [Domain] Plan Name [Domain] Net premiums earned: Premiums Earned, Net [Abstract] Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Credit facility borrowings (at carrying value, less unamortized deferred costs of $4,400 in 2022 and $5,177 in 2021) Long-Term Line of Credit Quoted Prices in Active  Markets for Identical Instruments (Level 1) Fair Value, Inputs, Level 1 [Member] Due in 1 year Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Amortized Cost Nonvested shares, share units Nonvested Shares, Share Units [Member] Nonvested Shares, Share Units [Member] Award Type [Axis] Award Type [Axis] Investments by Secondary Categorization [Domain] Investments by Secondary Categorization [Domain] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Radnor Re 2021-2 Ltd. Radnor Re 2021-2 Ltd. [Member] Radnor Re 2021-2 Ltd. Summary of Nonvested Common Share and Nonvested Common Share Unit Activity Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Due after 5 but within 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Fair Value Related Party Transaction [Domain] Related Party Transaction [Domain] Increase in contingency reserve Statutory Accounting Practices, Increase (Decrease) in Contingency Reserve Represents the amount of increase (decrease) in contingency reserve. Essent Guaranty Essent Guaranty Inc [Member] Represents information pertaining to Essent Guaranty, Inc. (Essent Guaranty), a regulated and licensed indirect wholly-owned subsidiary of the reporting entity. Due after 1 but within 5 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value Legal Entity [Axis] Legal Entity [Axis] VIE Variable Interest Entity, Not Primary Beneficiary [Member] Basic materials Basic Materials Sector [Member] Basic Materials Sector [Member] Total liabilities Liabilities Unearned premium reserve Increase (Decrease) in Unearned Premiums Stock-based compensation Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Prior years Liability incurred for claims and claim adjustment expenses Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Prior Years Reinsurance retention policy, debt issued to cover insurance, term Reinsurance, Debt Issued To Cover Insurance, Term Reinsurance, Debt Issued To Cover Insurance, Term Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Revolving Credit Facility Revolving Credit Facility [Member] Accumulated Net Investment Gains (Losses) On Investments AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent [Member] Minimum number of votes per share for other shareholders under 9.5% shareholder provision Minimum Number Of Votes Other Shareholders Minimum Number Of Votes Other Shareholders Document Type Document Type Number of Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Concentration Risk Benchmark [Domain] Concentration Risk Benchmark [Domain] Return of investment from other invested assets Proceeds from Equity Method Investment, Distribution, Return of Capital Outstanding at beginning of year (in dollars per share) Outstanding at end of period (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 Debt Obligations Debt Disclosure [Text Block] Operating Activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company Schedule of Coverages and Retentions Reinsurance Retention [Table Text Block] Deferred income tax provision Deferred Income Tax Expense (Benefit) Other accrued liabilities Increase (Decrease) in Accrued Liabilities Direct Direct Premiums Earned Schedule of Net Investment Income Investment Income [Table Text Block] Components of net investment income Net Investment Income [Line Items] Financial Instrument [Axis] Financial Instrument [Axis] Affiliated Entity Affiliated Entity [Member] Subsequent event Subsequent Event [Member] Increase of margin component of reinsurance premium Risk Margin Increase After Optional Termination Date Risk Margin Increase After Optional Termination Date Change in unrealized appreciation (depreciation) of investments, tax expense (benefit) Other Comprehensive Income (Loss), Available-for-Sale Securities, Tax, Portion Attributable to Parent Document Period End Date Document Period End Date First Vesting Period Share-Based Payment Arrangement, Tranche One [Member] Debt Securities, Available-for-sale [Table] Debt Securities, Available-for-Sale [Table] Unusual or Infrequent Item, or Both [Axis] Unusual or Infrequent Item, or Both [Axis] Schedule of Rollforward of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Total assets Total VIE Assets Assets Net loss and LAE payments during the current period Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid Certain members of senior management Certain Senior Management [Member] Represents some, but not all, of a team of individuals at the highest level of organizational management who have the day-to-day responsibilities of managing the entity. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Tax Effect AOCI Attributable To Parent, Tax [Roll Forward] AOCI Attributable To Parent, Tax Earnings Per Share [Abstract] Earnings Per Share [Abstract] Third Vesting Period Share-Based Payment Arrangement, Tranche Three [Member] Performance shares Performance Shares [Member] Other comprehensive income, tax effect Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Credit Concentration Risk Credit Concentration Risk [Member] Net cash used in financing activities Net Cash Provided by (Used in) Financing Activities Accounting Policies [Abstract] Accounting Policies [Abstract] Share repurchase approved amount Stock Repurchase Program, Authorized Amount Less: Reclassification adjustment for losses (gains) included in net income, net of tax Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Asset-backed securities Asset-Backed Securities [Member] Remaining Insurance in Force Reinsurance, Remaining Insurance In Force Reinsurance, Remaining Insurance In Force Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Stockholders’ equity Stockholders' Equity Attributable to Parent [Abstract] Earnings per Share (EPS) Earnings Per Share [Text Block] Less: Reinsurance recoverables Plus: Reinsurance recoverables Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Municipal debt securities Municipal debt securities Municipal Bonds [Member] Short-term investments Short-Term Investments [Member] 2022 Performance-based share awards Two Thousand Twenty Two Performance-Based Grants [Member] Two Thousand Twenty Two Performance-Based Grants Award Type [Domain] Award Type [Domain] Net unrealized gains Equity Securities, FV-NI, Unrealized Gain Expected weighted average period for recognition of expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Ceded premiums earned related to percent of risk on all other eligible policies written Reinsurance, Ceded Premiums Earned, Percent Of Risk On All Other Eligible Policies Reinsurance, Ceded Premiums Earned, Percent Of Risk On All Other Eligible Policies Total Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss Financing Activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Registrant Name Entity Registrant Name Other comprehensive income (loss): Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent, Parenthetical Disclosure [Abstract] Residential mortgage down payment percentage for which mortgage insurance is generally required (less than) Financing Receivable Consumer Mortgage Insured Down Payment Percentage Represents the percentage of the total sale price that a home buyer contributes in cash towards the purchase of a home for which mortgage insurance is generally required. Insurance [Abstract] Insurance [Abstract] Entity Address, City or Town Entity Address, City or Town Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Without single maturity date Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Minimum Minimum [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Common shares, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Unrealized holding gains (losses) arising during the period Other Comprehensive Income (Loss) before Reclassifications, Tax Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Deferred policy acquisition costs Deferred Policy Acquisition Cost Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Gross Unrealized Losses Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss [Abstract] Trading Symbol Trading Symbol Entity File Number Entity File Number Reinsurance percentage Reinsurance, Reinsured Risk, Percentage Less: Reclassification adjustment for losses (gains) included in net income, tax effect Reclassification from AOCI, Current Period, Tax Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Three-Year Book Value Per Share CAGR Compounded Annual Growth Rate, Three Year Book Value Compounded Annual Growth Rate, Three Year Book Value Schedule of Statutory Net Income, Statutory Surplus and Contingency Reserve Liability Statutory Accounting Practices Disclosure [Table Text Block] Total Variable Interest Entity, Reporting Entity Involvement, Maximum Loss (Gain) Exposure, Amount Variable Interest Entity, Reporting Entity Involvement, Maximum Loss (Gain) Exposure, Amount Investment Income [Table] Investment Income [Table] Title of Individual [Axis] Title of Individual [Axis] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Share Units Restricted Stock Units (RSUs) [Member] Concentration Risk Benchmark [Axis] Concentration Risk Benchmark [Axis] 5% Compounded Annual Growth Rate, Three Year Book Value Achieved, 5 Percent [Member] Compounded Annual Growth Rate, Three Year Book Value Achieved, 5 Percent Vesting percent Vesting percentile Share-based Compensation Arrangement by Share-based Payment Award, Awards Earned, Percentage Of Target Shares Granted Share-based Compensation Arrangement by Share-based Payment Award, Awards Earned, Percentage Of Target Shares Granted Written From October 1 Through July 31, 2022 Insurance Written Period [Member] Insurance Written Period Essent Re Essent Reinsurance Ltd [Member] Represents information pertaining to Essent Reinsurance Ltd. (Essent Re), a wholly-owned Bermuda-domiciled Class 3A Insurer licensed pursuant to Section 4 of the Bermuda Insurance Act 1978, which offers mortgage-related insurance and reinsurance. Other comprehensive income (loss): Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Maximum percent of individual ownership Shareholder Voting Rights Ownership Percentage Threshold Shareholder Voting Rights Ownership Percentage Threshold Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Concentration risk, percentage Concentration Risk, Percentage Total revenues Revenues Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Weighted average interest during period Debt, Weighted Average Interest Rate Credit Facility [Domain] Credit Facility [Domain] 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer Subtotal Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Interest payments Interest Paid, Excluding Capitalized Interest, Operating Activities Basic (in dollars per share) Basic earnings per share (in dollars per share) Earnings Per Share, Basic AOCI before tax, beginning of period AOCI before tax, end of period AOCI before Tax, Attributable to Parent Contingency reserve liability Statutory Accounting Practices, Statutory Contingency Reserve Liability Represents the amount of contingency reserve liability, as of the balance sheet date, using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. Total fair value of shares vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value Radnor Re 2018-1 Ltd. Radnor Re 2018-1 Ltd. [Member] Radnor Re 2018-1 Ltd. Concentration Risk Type [Domain] Concentration Risk Type [Domain] Counterparty Name [Domain] Counterparty Name [Domain] Treasury Stock Treasury Stock [Member] Total stockholders’ equity Balance, beginning of period Balance, end of period Stockholders' equity Stockholders' Equity Attributable to Parent Number of votes per share Common Stock Number Of Votes Common Stock Number Of Votes 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 Percentage of debt securities Investment Owned, Percent of Net Assets Vesting [Domain] Vesting [Domain] Statutory surplus Statutory Accounting Practices, Statutory Surplus Balance Represents the amount of statutory surplus (stockholders' equity), as of the balance sheet date, using prescribed or permitted statutory accounting practices (rather than GAAP, if different) of the state or country. Credit Facility [Line Items] Line of Credit Facility [Line Items] Amortization of premium on investment securities Investment Income, Amortization of Premium Accounts receivable Financing Receivable, after Allowance for Credit Loss Dividends Restrictions Statutory Accounting Practices [Line Items] Entity Interactive Data Current Entity Interactive Data Current Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Ceded Ceded Premiums Earned Change in: Increase (Decrease) in Operating Capital [Abstract] Money market funds Money Market Funds [Member] Proceeds from sales of investments available for sale Proceeds from Sale of Debt Securities, Available-for-Sale Retained Earnings Retained Earnings [Member] Internal Credit Assessment [Domain] Internal Credit Assessment [Domain] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Schedule of Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Table] Common Shares Common Stock [Member] Total other comprehensive income (loss) Other comprehensive loss Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Unrealized holding gains (losses) arising during the period OCI, before Reclassifications, Net of Tax, Attributable to Parent Treasury stock acquired Payments for Repurchase of Common Stock Statement [Table] Statement [Table] Vesting Criteria [Domain] Vesting Criteria [Domain] The types of vesting specified for share-based compensation awards. 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 Vesting Criteria [Axis] Vesting Criteria [Axis] Information about the type of vesting for share-based compensation awards. Radnor Re Radnor Re [Member] Radnor Re [Member] Document Quarterly Report Document Quarterly Report Other Reinsurance Other Reinsurance [Member] Other Reinsurance [Member] Earnings per share: Net Earnings Per Share [Abstract] Net Earnings Per Share Statistical Measurement [Axis] Statistical Measurement [Axis] Related Party Transaction [Axis] Related Party Transaction [Axis] Retained earnings Retained Earnings (Accumulated Deficit) Equity Components [Axis] Equity Components [Axis] Scenario [Domain] Scenario [Domain] Vesting Based On Performance Vesting Based On Performance [Member] Represents a share based compensation award with vesting based on achievement of performance conditions. Funding commitments Investment Company, Committed Capital Recurring Fair Value, Recurring [Member] Dividends Payable [Table] Dividends Payable [Table] Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract] Liability for Future Policy Benefits and Unpaid Claims and Claims Adjustment Expense [Abstract] Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months Document Fiscal Year Focus Document Fiscal Year Focus Coverage Period [Axis] Insurance Written Period [Axis] Insurance Written Period Statement Statement [Line Items] Outstanding at beginning of year (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Reserve for losses and LAE Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Effects of Reinsurance [Line Items] Effects of Reinsurance [Line Items] Net premiums written: Premiums Written, Net [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Unrealized Losses Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Less: Reclassification adjustment for losses (gains) included in net income, before tax Reclassification from AOCI, Current Period, before Tax, Attributable to Parent Due after 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 10 Years, Amortized Cost Unusual Risk or Uncertainty [Line Items] Unusual Risk or Uncertainty [Line Items] Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Decrease (increase) in unearned premiums (Increase) Decrease in Unearned Premiums, Net Credit facility borrowings Subordinated Borrowings [Abstract] Radnor Re 2021-1 Ltd. Radnor Re 2021-1 [Member] Radnor Re 2021-1 Document Transition Report Document Transition Report Other comprehensive loss, before tax Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent Local Phone Number Local Phone Number Assets on deposit for the benefit of the sponsor Assets On Deposit For The Benefit Of The Sponsor Assets On Deposit For The Benefit Of The Sponsor Accounting Standards Not Yet Adopted New Accounting Pronouncements, Policy [Policy Text Block] ILN Radnor Entities [Member] Radnor Entities [Member] Common shares, outstanding (in shares) Common Stock, Shares, Outstanding Reinsurance for mortgage insurance coverage in excess of 25% Excess Mortgage Insurance Coverage [Member] Represents an arrangement to assume that portion of the risk retained by an affiliate that is in excess of 25% of the balance of any mortgage loan insured by that affiliate after consideration of other reinsurance agreements at that affiliate, in accordance with certain state law requirements. 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] COVID-19 COVID-19 [Member] COVID-19 [Member] Income tax expense Income Tax Expense (Benefit) Collaborative Arrangement and Arrangement Other than Collaborative [Table] Collaborative Arrangement and Arrangement Other than Collaborative [Table] Net deferred tax liability Deferred Income Tax Liabilities, Net Deferred policy acquisition costs Increase (Decrease) in Deferred Policy Acquisition Costs Additional Paid-In Capital Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Essent PA Essent Guaranty Of P A Inc [Member] Represents information pertaining to Essent Guaranty of PA, Inc. (Essent PA), a regulated and licensed indirect wholly-owned subsidiary of the reporting entity. Special revenue bonds Special Revenue Municipal Bonds [Member] A municipal bond whose debt service is payable solely from the revenues derived from operating the facilities acquired or constructed with the proceeds of the bonds. Issuance of management incentive shares Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Diluted (in shares) Diluted weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted RIF ceded Risk In Force, Ceded Risk In Force, Ceded Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Loss Contingencies [Line Items] Loss Contingencies [Line Items] 2013 Plan Essent Group Limited2013 Long Term Incentive Plan [Member] Represents the Essent Group Limited 2013 Long-term Incentive Plan (2013 Plan). Investments available for sale Debt Securities, Available-for-Sale [Line Items] Schedule of Investments Available for Sale Schedule of Available-for-Sale Securities Reconciliation [Table Text Block] Quarterly cash dividends paid (in dollars per share) Common Stock, Dividends, Per Share, Cash Paid Prepaid federal income tax Increase (Decrease) in Mortgage Guaranty Insurer United States Mortgage Guaranty Tax and Loss Bonds Represents, for a mortgage guaranty insurer, the increase (decrease) during the reporting period in the amount of investment in United States Mortgage Guaranty Tax and Loss Bonds issued by the Treasury Department for eligibility for certain tax deductions under enacted tax laws. Unamortized deferred costs Debt Issuance Costs, Gross Remaining Risk in Force Reinsurance, Remaining Risk In Force Reinsurance, Remaining Risk In Force Total investments Investments Common shares, $0.015 par value: Authorized - 233,333; issued and outstanding - 107,696 shares in 2022 and 109,377 shares in 2021 Common Stock, Value, Issued Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Percentage of award issuable if current period end were end of contingency period Share-based Compensation Arrangement by Share-based Payment Award, Award Period to Date Vesting Rights, Percentage Percentage of vesting of share-based compensation awards if the end of the current reporting period were the end of the vesting period. Ceding commission, percent Reinsurance, Ceded Premiums Earned, Ceding Commission, Percent Reinsurance, Ceded Premiums Earned, Ceding Commission, Percent 13% "Target" Compounded Annual Growth Rate, Three Year Book Value Achieved, 13 Percent [Member] Compounded Annual Growth Rate, Three Year Book Value Achieved, 13 Percent Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Realized investment (losses) gains, net Realized investment losses (gains), net Realized Investment Gains (Losses) Schedule of Assets and Liabilities Measured at Fair Vale on a Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Time-Based Share Awards Vesting Based On Service [Member] Represents a share based compensation award with vesting based on length of service. Employee Employee [Member] Employee [Member] Other income Other Income Property and equipment Property, Plant and Equipment, Net [Abstract] Profit commission, percent, maximum Reinsurance, Profit Commissions, Maximum Reinsurance, Profit Commissions, Maximum Ceded premiums earned related to percent of risk on eligible single premium policies Reinsurance, Ceded Premiums Earned, Percent Of Risk On Eligible Single Premium Policies Reinsurance, Ceded Premiums Earned, Percent Of Risk On Eligible Single Premium Policies Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Assets on deposit under reinsurance agreement Assets on Deposit Under Reinsurance Agreements Assets on Deposit Under Reinsurance Agreements Communications Communications Sector [Member] Communications Sector [Member] Tax allocation bonds Tax Allocation Municipal Bonds [Member] Bonds issued in conjunction with a redevelopment project. The taxes pledged to their repayment come from the increase of assessed value over and above a pre-established base. The redevelopment creates this added value, known as the tax increment. Cash at beginning of year Cash at end of period Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Schedule of Effect of Reinsurance Effects of Reinsurance [Table Text Block] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Net income Net income Net Income (Loss) Available to Common Stockholders, Basic Common shares, issued (in shares) Common Stock, Shares, Issued Nonvested shares, share units or DEU Nonvested Shares, Share Units Or DEU [Member] Nonvested Shares, Share Units Or DEU [Member] Other invested assets Equity Method Investments Reinsurance for mortgage insurance coverage threshold (in excess of) Reinsurance Retention Policy, Reinsured Risk, Percentage Threshold Threshold percentage of risk reinsured on insurance products per entity policy. Reserve for losses and LAE, for prior years Liability for Unpaid Claims and Claims Adjustment Expense Prior Years Liability, as of the balance sheet date, for amounts representing estimated cost of settling unpaid claims for prior years under the terms of the underlying insurance policies, less estimated reinsurance recoveries on such claims. This includes an estimate for claims which have been incurred but not reported. Claim adjustment expenses represent the costs estimated to be incurred in the settlement of unpaid claims. Number of investment securities in an unrealized loss position Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions Total Debt Securities, Available-for-Sale, Unrealized Loss Position Amendment Flag Amendment Flag Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Investment Type [Axis] Investment Type [Axis] Credit facility borrowings Proceeds from Long-Term Lines of Credit Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent 9% Compounded Annual Growth Rate, Three Year Book Value Achieved, 9 Percent [Member] Compounded Annual Growth Rate, Three Year Book Value Achieved, 9 Percent Unrealized Gains Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax Entity Current Reporting Status Entity Current Reporting Status Schedule of Realized Gross Gains and Losses on Sale of Investments Available for Sale Schedule of Realized Gain (Loss) [Table Text Block] Depreciation and amortization Depreciation, Depletion and Amortization Deduct payments for losses and LAE, net of reinsurance, occurring in: Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid [Abstract] Essent PA Essent PA [Member] Essent PA [Member] Benefit recorded in provision for losses Liability for Unpaid Claims and Claims Adjustment Expense, Period Increase (Decrease) Remaining Reinsurance in Force Reinsurance, Remaining Reinsurance In Force Reinsurance, Remaining Reinsurance In Force Released contingency reserve Statutory Accounting Practices, Release of Contingency Reserve Statutory Accounting Practices, Release of Contingency Reserve Counterparty Name [Axis] Counterparty Name [Axis] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] ≥75th percentile Share-based Payment Arrangement, Greater than or Equal to 75th Percentile [Member] Share-based Payment Arrangement, Greater than or Equal to 75th Percentile Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Remaining First Layer Retention Reinsurance, Amount Retained, Per Life Insurance Premium Revenue Recognition Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Industrial Industrial Sector [Member] Industrial Sector [Member] Liabilities Liabilities [Abstract] Property and equipment (at cost, less accumulated depreciation of $66,562 in 2022 and $64,340 in 2021) Property, Plant and Equipment, Net Coverage Period [Domain] Coverage Period [Domain] Coverage Period [Domain] Schedule of Dividends Declared and Paid Per Common Share Dividends Declared [Table Text Block] Title of Individual [Domain] Title of Individual [Domain] Securities Securities [Member] Securities [Member] Statutory capital and surplus Statutory Accounting Practices, Statutory Capital and Surplus, Balance Dividends and dividend equivalents declared Dividends Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Recently Issued Accounting Standards Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Common shares, authorized (in shares) Common Stock, Shares Authorized Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Maximum Maximum [Member] Radnor Re 2020-1 Ltd. Radnor Re 2020-1 [Member] Radnor Re 2020-1 [Member] Accumulated other comprehensive (loss) income Accumulated Other Comprehensive Income (Loss), Net of Tax Effects of Reinsurance [Table] Effects of Reinsurance [Table] Dividends Restrictions Dividend Payment Restrictions [Text Block] Time and Performance- Based Share Awards Vesting Based On Service And Performance [Member] Represents a share based compensation award with vesting based on a combination of length of service and achievement of performance conditions. Dividends Payable [Line Items] Dividends Payable [Line Items] Asset liquidation period Investment Company, Asset Liquidation Period Investment Company, Asset Liquidation Period Entity Small Business Entity Small Business Measurement Frequency [Domain] Measurement Frequency [Domain] ≤25th percentile Share-based Payment Arrangement, Less than or Equal to 25th Percentile [Member] Share-based Payment Arrangement, Less than or Equal to 25th Percentile Capital Stock Stockholders' Equity Note Disclosure [Text Block] Quarterly cash dividends declared (in dollars per share) Common Stock, Dividends, Per Share, Declared Revenues: Revenues [Abstract] Credit Facility [Table] Line of Credit Facility [Table] Unusual or Infrequent Item, or Both [Domain] Unusual or Infrequent Item, or Both [Domain] Purchase of investments available for sale Payments to Acquire Debt Securities, Available-for-Sale Residential and commercial mortgage securities Residential and commercial mortgage securities Residential And Commercial Mortgage Securities [Member] Residential And Commercial Mortgage Securities [Member] Net premiums earned Premiums Earned, Net Limited Partnership Investments Limited Partnership Investments [Member] Limited Partnership Investments Fair value of the required investments on deposit in trusts Assets Held-in-trust Without single maturity date Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Amortized Cost Income tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Stock repurchased (in shares) Stock Repurchased and Retired During Period, Shares Radnor Re 2019-1 Ltd. Radnor Re 2019-1 Ltd. [Member] Radnor Re 2019-1 Ltd. [Member] Accounts receivable Increase (Decrease) in Accounts Receivable Title of 12(b) Security Title of 12(b) Security Other assets, fair value Other Assets, Fair Value Disclosure Nature of Operations and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Statutory Accounting Practices [Table] Statutory Accounting Practices [Table] Consolidated Entities [Axis] Consolidated Entities [Axis] Distribution of income from other invested assets Proceeds from Equity Method Investment, Distribution Credit facility repayments Repayments of Lines of Credit Stockholders’ Equity Common Stock, Number of Shares, Par Value and Other Disclosure [Abstract] Other accrued liabilities Other Accrued Liabilities Less than 12 months Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Payment of issuance costs for credit facility Payments of Debt Issuance Costs U.S. agency securities US Government Agencies Debt Securities [Member] Impairment loss Impairment Debt Securities, Held-to-Maturity, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff Investments, Debt and Equity Securities [Abstract] Investments, Debt and Equity Securities [Abstract] Entity Address, Country Entity Address, Country 12 months or more Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Internal Credit Assessment [Axis] Internal Credit Assessment [Axis] Liabilities and Stockholders’ Equity Liabilities and Equity [Abstract] Performance period Share Based Compensation Arrangement by Share Based Payment Award Performance Period Represents the period over which a performance condition to the award is measured, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Internal Investment Grade Internal Investment Grade [Member] U.S. Treasury securities US Treasury Securities [Member] Amortized cost Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost Unrealized holding gains (losses) arising during the period OCI, before Reclassifications, before Tax, Attributable to Parent Current period Current Year Claims and Claims Adjustment Expense Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Schedule of Portion of Nonvested Shares Earned Based Upon Achievement of Compounded Annual Book Value Per Share Growth Schedule of Shares Earned Unvested Performance Shares [Table Text Block] Tabular disclosure of shares earned for unvested performance shares. Amortized Cost Debt Securities, Available-for-Sale, Maturity, Fair Value, Rolling Maturity [Abstract] Other comprehensive income (loss): Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Other assets Increase (Decrease) in Other Operating Assets Schedule of Amortized Cost and Fair Value of Investments Available for Sale by Contractual Maturity Investments Classified by Contractual Maturity Date [Table Text Block] Entity Filer Category Entity Filer Category Basic (in shares) Basic weighted average shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Basic Schedule of VIE Assets and Maximum Exposure Schedule of Variable Interest Entities [Table Text Block] Prior years Prior year claims and claims adjustment expense Prior Year Claims and Claims Adjustment Expense Unusual Risk or Uncertainty [Table] Unusual Risk or Uncertainty [Table] Compensation expense Share-Based Payment Arrangement, Expense Noncash Transactions Noncash Investing and Financing Items [Abstract] Commitments and contingencies (see Note 7) Commitments and Contingencies Security Exchange Name Security Exchange Name Share Repurchase Plan 2021 Share Repurchase Plan 2021 [Member] Share Repurchase Plan 2021 Dividends paid to parent company SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries Estimated fair values and carrying amounts of financial instruments Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Nonvested shares Restricted Stock [Member] Accrued investment income Increase (Decrease) in Accrued Investment Income Receivable Radnor Re 2019-2 Ltd. Radnor Re 2019-2 [Member] Radnor Re 2019-2 [Member] Cover [Abstract] Cover [Abstract] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Fixed maturities Fixed Maturities [Member] Schedule of Compensation Expense, Net of Forfeitures, and Related Tax Effects Recognized in Connection with Nonvested Shares Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Other assets Other Assets Add provision for losses and LAE, net of reinsurance, occurring in: Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims [Abstract] Net premiums written Net premiums written Premiums Written, Net Investments [Domain] Investments [Domain] Forecast Forecast [Member] AOCI tax effect, beginning of period AOCI tax effect, end of period AOCI Tax, Attributable to Parent Due after 5 but within 10 years Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Rolling after 5 through 10 Years, Amortized Cost Total liabilities and stockholders’ equity Liabilities and Equity Percent of defaults cured Risk In Force, Percent Of Defaults Cured Risk In Force, Percent Of Defaults Cured Current period Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid, Current Year Relative Total Shareholder Return [Axis] Relative Total Shareholder Return [Axis] Relative Total Shareholder Return Related Party [Axis] Related Party [Axis] Before Tax AOCI Attributable To Parent, Before Tax [Roll Forward] AOCI Attributable To Parent, Before Tax [Roll Forward] Income from other invested assets Income (Loss) From Equity Method Investments And Other Invested Assets Income (Loss) From Equity Method Investments And Other Invested Assets Remaining authorized repurchase amount Stock Repurchase Program, Remaining Authorized Repurchase Amount Cash Cash SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Table] Organization, Consolidation and Presentation of Financial Statements [Abstract] Organization, Consolidation and Presentation of Financial Statements [Abstract] Net of Tax AOCI Attributable to Parent, Net of Tax [Roll Forward] Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Current Fiscal Year End Date Current Fiscal Year End Date QSR 2019 QSR 2019 [Member] QSR 2019 Certificate of participation bonds Certification Of Participation Bonds [Member] Represents a type of financing where an investor purchases a share of the lease revenues of a program rather than the bond being secured by those revenues. Realized gross gains Debt Securities, Available-for-Sale, Realized Gain EPS calculation Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Vesting [Axis] Vesting [Axis] Diluted (in dollars per share) Diluted earnings per share (in dollars per share) Earnings Per Share, Diluted 7% Compounded Annual Growth Rate, Three Year Book Value Achieved, 7 Percent [Member] Compounded Annual Growth Rate, Three Year Book Value Achieved, 7 Percent Second Vesting Period Share-Based Payment Arrangement, Tranche Two [Member] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] Award vesting period Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Stock-based compensation expense APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Concentration Risk Type [Axis] Concentration Risk Type [Axis] Fair Value Debt Securities, Trading and Available-for-Sale Line of credit facility, accordion feature (up to) Line of Credit Facility, Accordion Feature Line of Credit Facility, Accordion Feature Net reserve for losses and LAE at beginning of period Net reserve for losses and LAE at end of period Liability for Unpaid Claims and Claims Adjustment Expense, Net DEUs Dividend Equivalent Unit [Member] Dividend Equivalent Unit [Member] Share Repurchase Program [Axis] Share Repurchase Program [Axis] Corporate debt securities Corporate Debt Securities [Member] Annual commitment fee rate Line of Credit Facility, Commitment Fee Percentage Investment expenses Investment Income, Investment Expense Amortization period Amortization Period Excess of Loss Portfolio Amortization Period Excess of Loss Portfolio Utilities Utilities Sector [Member] Utilities Sector [Member] Non-U.S. government securities Non-U.S. government securities: Debt Security, Government, Non-US [Member] Net change in short-term investments Payments for (Proceeds from) Short-Term Investments Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, Address Line One Entity Address, Address Line One Reinsurance Reinsurance [Text Block] Prepaid federal income tax Mortgage Guaranty Insurer United States Mortgage Guaranty Tax and Loss Bonds Represents, for a mortgage guaranty insurer, the amount of investment in United States Mortgage Guaranty Tax and Loss Bonds issued by the Treasury Department for eligibility for certain tax deductions under enacted tax laws. Financial Assets: Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract] Ceded Ceded Premiums Written Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Interest expense Interest Expense (Benefit) provision for losses and LAE Net incurred losses and LAE during the current period Liability for Unpaid Claims and Claims Adjustment Expense, Incurred Claims Investments Investment available for sale Fair Value Debt Securities, Available-for-Sale [Abstract] Technology Technology Debt Sector [Member] Technology Debt Sector [Member] Credit Facility [Axis] Credit Facility [Axis] Unassigned surplus Dividend Payments Restrictions Schedule, Statutory Capital and Surplus Gross investment income Gross Investment Income, Operating Equity [Abstract] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Energy Energy Sector [Member] Energy Sector [Member] Reserve for Losses and Loss Adjustment Expenses Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Quota share reinsurance Quota Share Reinsurance Transaction [Member] Represents an agreement between an insurer and a reinsurer whereby the reinsurer pays an agreed-upon percentage of all losses the insurer sustains. Reinsurance Disclosures [Abstract] Reinsurance Disclosures [Abstract] Relative Total Shareholder Return [Domain] Relative Total Shareholder Return [Domain] Relative Total Shareholder Return 11% Compounded Annual Growth Rate, Three Year Book Value Achieved, 11 Percent [Member] Compounded Annual Growth Rate, Three Year Book Value Achieved, 11 Percent Other comprehensive income (loss): Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent [Abstract] Panel of Reinsurers Panel Of Reinsurers [Member] Panel Of Reinsurers [Member] Consolidated Entities [Domain] Consolidated Entities [Domain] Consumer, cyclical Consumer, Cyclical Sector [Member] Consumer, Cyclical Sector [Member] Shares tendered by employees to pay employee withholding taxes (in shares) Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Reinsurance Contract [Axis] Reinsurance Contract [Axis] Share Repurchase Plan 2022 Share Repurchase Plan 2022 [Member] Share Repurchase Plan 2022 Net (decrease) increase in cash Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Subtotal Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Amortized Cost Accrued investment income Accrued Investment Income Receivable Fair value of investments deposited with insurance regulatory authorities Debt Securities, Available-for-Sale, Restricted Entity Central Index Key Entity Central Index Key Measurement Frequency [Axis] Measurement Frequency [Axis] 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] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Financial Financial Sector [Member] Financial Sector [Member] QSR 2022 QSR 2022 [Member] QSR 2022 50th percentile "Target" Share-based Payment Arrangement, 50th Percentile [Member] Share-based Payment Arrangement, 50th Percentile Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Entity [Domain] Entity [Domain] City Area Code City Area Code Assets Assets [Abstract] Statutory Accounting Statutory Accounting Disclosure [Text Block] Represents the entire disclosure pertaining to the statutory accounting. Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Amount available for dividend distribution Amount Available for Dividend Distribution without Affecting Capital Adequacy Requirements Total losses and expenses Benefits Losses And Expense Benefits Losses And Expense Direct Direct Premiums Written Proceeds from maturities and paydowns of investments available for sale Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale U.S. agency mortgage-backed securities Collateralized Mortgage-Backed Securities [Member] Stock-based compensation expense Share-Based Payment Arrangement, Noncash Expense Purchase of other invested assets Payments to Acquire Equity Method Investments Cancellation of treasury stock Treasury Stock, Retired, Cost Method, Amount Income from other invested assets Income (Loss) from Equity Method Investments Amount paid for remedies (less than) Loss Contingency Accrual, Payments Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment General obligation bonds General Obligation Municipal Bonds [Member] A bond secured by a pledge of the issuer's taxing powers (limited or unlimited). More commonly the general obligation bonds of local governments are paid from ad valorem property taxes and other general revenues. Considered the most secure of all municipal debt. Schedule of Reconciliation of Net Income and Weighted Average Common Shares Outstanding Used in Computations of Basic and Diluted Earnings Per Common Share Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Realized gross losses Debt Securities, Available-for-Sale, Realized Loss Lease liabilities arising from obtaining right-of-use assets Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Unearned premium reserve Unearned Premiums