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by (Used in) Financing Activities Underlying Securities Award Underlying Securities Amount Investments Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Credit Facility [Axis] Credit Facility [Axis] Amendment Flag Amendment Flag Long-term borrowings Long-Term Debt, Fair Value Carrying amount Reported Value Measurement [Member] Entity Registrant Name Entity Registrant Name Commercial mortgage-backed Commercial Mortgage-Backed Securities [Member] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Less than 12 months, Number of securities Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Number of Positions Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reinsurance recoverable, beginning balance Reinsurance recoverable, ending balance Reinsurance Recoverable for Unpaid Claims and Claims Adjustments Fair Value as of Grant Date Award Grant Date Fair Value Deferred borrowing charges and discount Debt Issuance Costs, Net Level 2 Fair Value, Inputs, Level 2 [Member] Due one year or less Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One Borrowings Debt Disclosure [Text Block] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Face amount Debt Instrument, Face Amount Entity Address, Postal Zip Code Entity Address, Postal Zip Code Line of credit facility, additional borrowing capacity Line of Credit Facility, Accordion Feature, Increase Limit Line of Credit Facility, Accordion Feature, Increase Limit Restatement Determination Date: Restatement Determination Date [Axis] Title of 12(b) Security Title of 12(b) Security Common stock ($0.01 par value; 600,000 shares authorized; 145,566 shares issued and outstanding as of September 30, 2025, and 152,318 shares issued and outstanding as of December 31, 2024) Common Stock, Value, Issued U.S. government, agencies and GSEs US Government Debt Securities [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward] Other Payments for (Proceeds from) Other Investing Activities Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Gain (Loss) on Extinguishment of Debt Gain (Loss) on Extinguishment of Debt Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Percentage of portfolio priced using third-party pricing services Debt Securities, Available-for-Sale, Excluding Accrued Interest, Percentage Of Portfolio Priced Using Third-Party Pricing Services Debt Securities, Available-for-Sale, Excluding Accrued Interest, Percentage Of Portfolio Priced Using Third-Party Pricing Services Fair Value Measurement [Domain] Fair Value Measurement [Domain] Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Basic (in usd per share) Net income per common share, basic (in usd per share) Earnings Per Share, Basic Cash and Cash Equivalents Cash and Cash Equivalents [Member] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Fixed maturity securities available-for-sale: Debt Securities, Available-for-Sale, Realized Gain (Loss) [Abstract] Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract] Net income Net income Net income available to EHI common stockholders Net Income (Loss) Available to Common Stockholders, Basic Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Total assets Assets Schedule of Fair Value Assets Measured on Recurring Basis Fair Value, Assets Measured on Recurring Basis [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Reclassification adjustments to net investment (gains) losses, net of taxes of $(592) and $(262), respectively Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax Net unrealized investment gains (losses) AOCI, Debt Securities, Available-for-Sale, Adjustment, after Tax Termination Date Trading Arrangement Termination Date Related Party Transaction [Table] Related Party Transaction [Table] Assumed Assumed Premiums Written 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 revenues Revenues Comprehensive income (loss): Partners' Capital, Comprehensive Income [Abstract] Other liabilities Other Liabilities Reinsurance Retention Policy [Table] Reinsurance Retention [Table] Entity Address, City or Town Entity Address, City or Town Net proceeds from the issuance of long-term debt Proceeds from Issuance of Long-Term Debt Due after one year through five years Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five Debt Instrument [Axis] Debt Instrument [Axis] Net Income (Loss) Net Income (Loss) Attributable to Parent Trading Arrangement: Trading Arrangement [Axis] Investments, Debt and Equity Securities [Abstract] Assets held by insurance regulators Assets Held by Insurance Regulators Changes in accumulated other comprehensive income Comprehensive Income (Loss) Note [Text Block] Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Net premiums written Written premiums Premiums Written, Net Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] Due after ten years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10 Total investments Available-for-Sale Securities [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Total losses and expenses Benefits, Losses and Expenses Income taxes Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), Tax Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain (Loss), Tax Entity File Number Entity File Number Document Fiscal Year Focus Document Fiscal Year Focus Subtotal Debt Securities, Available-for-Sale, Maturity, Allocated and Single Maturity Date, Fair Value Income Statement [Abstract] Entity Address, Address Line One Entity Address, Address Line One Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Total Assets, Fair Value Disclosure Name Forgone Recovery, Individual Name Document Period End Date Document Period End Date Sale of Stock [Axis] Sale of Stock [Axis] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Residential mortgage-backed and other asset-backed, fair value Debt Securities, Available-for-Sale, Maturity, without Single Maturity Date, Fair Value Limited Partnership Limited Partnership [Member] Limited Partnership Asset Class [Axis] Asset Class [Axis] Insider Trading Arrangements [Line Items] Amortized cost Amortized cost Debt Securities, Available-for-Sale, Amortized Cost, Excluding Accrued Interest, before Allowance for Credit Loss Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount 2022 Revolving Credit Facility 2022 Revolving Credit Facility [Member] 2022 Revolving Credit Facility PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Adjustment to Compensation: Adjustment to Compensation [Axis] Amounts receivable from Genworth Accounts and Financing Receivable, after Allowance for Credit Loss, Current Document Transition Report Document Transition Report Document Quarterly Report Document Quarterly Report Losses and LAE incurred related to current accident year Losses and LAE incurred Current Year Claims and Claims Adjustment Expense Due after one year through five years Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Entity Current Reporting Status Entity Current Reporting Status Purchases Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases Schedule of Unrealized Losses and FV of Fixed Maturity Securities Available for Sale Gain (Loss) on Securities [Table Text Block] Retained earnings Retained Earnings [Member] Amortization of debt issuance costs Amortization of Debt Issuance Costs Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Gross investment income before expenses and fees Gross Investment Income, Operating Senior Notes, Due 2025 Senior Notes, Due 2025 [Member] Senior Notes, Due 2025 Related Party [Axis] Related and Nonrelated Parties [Axis] Basic (in shares) Weighted average common shares outstanding - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Utilities Industry Group Utilities Industry Group [Member] Utilities Industry Group Provision for income taxes OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, Tax Premiums Net premiums earned Premiums Earned, Net 12 months or more, Gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Net realized gains (losses) Debt Securities, Available-for-Sale, Realized Gain (Loss) Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Executive Category: Executive Category [Axis] Name Awards Close in Time to MNPI Disclosures, Individual Name Amortization of deferred acquisition costs and intangibles Amortization of deferred acquisition costs and intangibles Amortization Of Deferred Policy Acquisition Costs And Intangibles Amortization Of Deferred Policy Acquisition Costs And Intangibles Less than 12 months, Gross unrealized losses Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss Entity Filer Category Entity Filer Category Amounts reclassified from other comprehensive income (loss) Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Purchases of fixed maturity securities available-for-sale Payments to Acquire Debt Securities, Available-for-Sale Company Selected Measure Name Company Selected Measure Name