| | | | | | | | | | | | | | | | | | | | | |
<?xml version="1.0" encoding="windows-1252"?> |
<FilingSummary> |
| <Version> 3.23.3 </Version> |
| <ProcessingTime/> |
| <ReportFormat> html </ReportFormat> |
| <ContextCount> 365 </ContextCount> |
| <ElementCount> 307 </ElementCount> |
| <EntityCount> 1 </EntityCount> |
| <FootnotesReported> false </FootnotesReported> |
| <SegmentCount> 116 </SegmentCount> |
| <ScenarioCount> 0 </ScenarioCount> |
| <TuplesReported> false </TuplesReported> |
| <UnitCount> 7 </UnitCount> |
| <MyReports> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R1.htm </HtmlFileName> |
| | | <LongName> 0000001 - Document - Cover Page </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CoverPage </Role> |
| | | <ShortName> Cover Page </ShortName> |
| | | <MenuCategory> Cover </MenuCategory> |
| | | <Position> 1 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R2.htm </HtmlFileName> |
| | | <LongName> 0000002 - Statement - Condensed Consolidated Balance Sheets (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CondensedConsolidatedBalanceSheetsUnaudited </Role> |
| | | <ShortName> Condensed Consolidated Balance Sheets (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 2 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R3.htm </HtmlFileName> |
| | | <LongName> 0000003 - Statement - Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CondensedConsolidatedBalanceSheetsUnauditedParenthetical </Role> |
| | | <ShortName> Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 3 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R4.htm </HtmlFileName> |
| | | <LongName> 0000004 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited </Role> |
| | | <ShortName> Condensed Consolidated Statements of Comprehensive Income (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 4 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R5.htm </HtmlFileName> |
| | | <LongName> 0000005 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnauditedParenthetical </Role> |
| | | <ShortName> Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 5 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R6.htm </HtmlFileName> |
| | | <LongName> 0000006 - Statement - Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CondensedConsolidatedStatementsofChangesinStockholdersEquityUnaudited </Role> |
| | | <ShortName> Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 6 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R7.htm </HtmlFileName> |
| | | <LongName> 0000007 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited </Role> |
| | | <ShortName> Condensed Consolidated Statements of Cash Flows (Unaudited) </ShortName> |
| | | <MenuCategory> Statements </MenuCategory> |
| | | <Position> 7 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R8.htm </HtmlFileName> |
| | | <LongName> 0000008 - Disclosure - Nature of Operations and Basis of Presentation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/NatureofOperationsandBasisofPresentation </Role> |
| | | <ShortName> Nature of Operations and Basis of Presentation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 8 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R9.htm </HtmlFileName> |
| | | <LongName> 0000009 - Disclosure - Recently Issued Accounting Standards </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/RecentlyIssuedAccountingStandards </Role> |
| | | <ShortName> Recently Issued Accounting Standards </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 9 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R10.htm </HtmlFileName> |
| | | <LongName> 0000010 - Disclosure - Investments </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/Investments </Role> |
| | | <ShortName> Investments </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 10 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R11.htm </HtmlFileName> |
| | | <LongName> 0000011 - Disclosure - Reinsurance </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/Reinsurance </Role> |
| | | <ShortName> Reinsurance </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 11 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R12.htm </HtmlFileName> |
| | | <LongName> 0000012 - Disclosure - Reserve for Losses and Loss Adjustment Expenses </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReserveforLossesandLossAdjustmentExpenses </Role> |
| | | <ShortName> Reserve for Losses and Loss Adjustment Expenses </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 12 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R13.htm </HtmlFileName> |
| | | <LongName> 0000013 - Disclosure - Debt Obligations </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/DebtObligations </Role> |
| | | <ShortName> Debt Obligations </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 13 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R14.htm </HtmlFileName> |
| | | <LongName> 0000014 - Disclosure - Commitments and Contingencies </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CommitmentsandContingencies </Role> |
| | | <ShortName> Commitments and Contingencies </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 14 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R15.htm </HtmlFileName> |
| | | <LongName> 0000015 - Disclosure - Capital Stock </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CapitalStock </Role> |
| | | <ShortName> Capital Stock </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 15 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R16.htm </HtmlFileName> |
| | | <LongName> 0000016 - Disclosure - Stock-Based Compensation </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StockBasedCompensation </Role> |
| | | <ShortName> Stock-Based Compensation </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 16 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R17.htm </HtmlFileName> |
| | | <LongName> 0000017 - Disclosure - Dividends Restrictions </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/DividendsRestrictions </Role> |
| | | <ShortName> Dividends Restrictions </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 17 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R18.htm </HtmlFileName> |
| | | <LongName> 0000018 - Disclosure - Earnings per Share (EPS) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/EarningsperShareEPS </Role> |
| | | <ShortName> Earnings per Share (EPS) </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 18 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R19.htm </HtmlFileName> |
| | | <LongName> 0000019 - Disclosure - Accumulated Other Comprehensive Income (Loss) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AccumulatedOtherComprehensiveIncomeLoss </Role> |
| | | <ShortName> Accumulated Other Comprehensive Income (Loss) </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 19 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R20.htm </HtmlFileName> |
| | | <LongName> 0000020 - Disclosure - Fair Value of Financial Instruments </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/FairValueofFinancialInstruments </Role> |
| | | <ShortName> Fair Value of Financial Instruments </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 20 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R21.htm </HtmlFileName> |
| | | <LongName> 0000021 - Disclosure - Statutory Accounting </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StatutoryAccounting </Role> |
| | | <ShortName> Statutory Accounting </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 21 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R22.htm </HtmlFileName> |
| | | <LongName> 0000022 - Disclosure - Acquisitions </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/Acquisitions </Role> |
| | | <ShortName> Acquisitions </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 22 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R23.htm </HtmlFileName> |
| | | <LongName> 995410 - Disclosure - Pay vs Performance Disclosure </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://xbrl.sec.gov/ecd/role/PvpDisclosure </Role> |
| | | <ShortName> Pay vs Performance Disclosure </ShortName> |
| | | <MenuCategory> Notes </MenuCategory> |
| | | <Position> 23 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R24.htm </HtmlFileName> |
| | | <LongName> 9954471 - Disclosure - Recently Issued Accounting Standards (Policies) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/RecentlyIssuedAccountingStandardsPolicies </Role> |
| | | <ShortName> Recently Issued Accounting Standards (Policies) </ShortName> |
| | | <MenuCategory> Policies </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/RecentlyIssuedAccountingStandards </ParentRole> |
| | | <Position> 24 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R25.htm </HtmlFileName> |
| | | <LongName> 9954472 - Disclosure - Investments (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsTables </Role> |
| | | <ShortName> Investments (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/Investments </ParentRole> |
| | | <Position> 25 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R26.htm </HtmlFileName> |
| | | <LongName> 9954473 - Disclosure - Reinsurance (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReinsuranceTables </Role> |
| | | <ShortName> Reinsurance (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/Reinsurance </ParentRole> |
| | | <Position> 26 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R27.htm </HtmlFileName> |
| | | <LongName> 9954474 - Disclosure - Reserve for Losses and Loss Adjustment Expenses (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReserveforLossesandLossAdjustmentExpensesTables </Role> |
| | | <ShortName> Reserve for Losses and Loss Adjustment Expenses (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/ReserveforLossesandLossAdjustmentExpenses </ParentRole> |
| | | <Position> 27 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R28.htm </HtmlFileName> |
| | | <LongName> 9954475 - Disclosure - Capital Stock (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CapitalStockTables </Role> |
| | | <ShortName> Capital Stock (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/CapitalStock </ParentRole> |
| | | <Position> 28 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R29.htm </HtmlFileName> |
| | | <LongName> 9954476 - Disclosure - Stock-Based Compensation (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StockBasedCompensationTables </Role> |
| | | <ShortName> Stock-Based Compensation (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/StockBasedCompensation </ParentRole> |
| | | <Position> 29 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R30.htm </HtmlFileName> |
| | | <LongName> 9954477 - Disclosure - Earnings per Share (EPS) (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/EarningsperShareEPSTables </Role> |
| | | <ShortName> Earnings per Share (EPS) (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/EarningsperShareEPS </ParentRole> |
| | | <Position> 30 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R31.htm </HtmlFileName> |
| | | <LongName> 9954478 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AccumulatedOtherComprehensiveIncomeLossTables </Role> |
| | | <ShortName> Accumulated Other Comprehensive Income (Loss) (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/AccumulatedOtherComprehensiveIncomeLoss </ParentRole> |
| | | <Position> 31 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R32.htm </HtmlFileName> |
| | | <LongName> 9954479 - Disclosure - Fair Value of Financial Instruments (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/FairValueofFinancialInstrumentsTables </Role> |
| | | <ShortName> Fair Value of Financial Instruments (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/FairValueofFinancialInstruments </ParentRole> |
| | | <Position> 32 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R33.htm </HtmlFileName> |
| | | <LongName> 9954480 - Disclosure - Statutory Accounting (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StatutoryAccountingTables </Role> |
| | | <ShortName> Statutory Accounting (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/StatutoryAccounting </ParentRole> |
| | | <Position> 33 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R34.htm </HtmlFileName> |
| | | <LongName> 9954481 - Disclosure - Acquisitions (Tables) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AcquisitionsTables </Role> |
| | | <ShortName> Acquisitions (Tables) </ShortName> |
| | | <MenuCategory> Tables </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/Acquisitions </ParentRole> |
| | | <Position> 34 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R35.htm </HtmlFileName> |
| | | <LongName> 9954482 - Disclosure - Nature of Operations and Basis of Presentation (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/NatureofOperationsandBasisofPresentationDetails </Role> |
| | | <ShortName> Nature of Operations and Basis of Presentation (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/NatureofOperationsandBasisofPresentation </ParentRole> |
| | | <Position> 35 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R36.htm </HtmlFileName> |
| | | <LongName> 9954483 - Disclosure - Investments - Schedule of Investments Available for Sale (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsScheduleofInvestmentsAvailableforSaleDetails </Role> |
| | | <ShortName> Investments - Schedule of Investments Available for Sale (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 36 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R37.htm </HtmlFileName> |
| | | <LongName> 9954484 - Disclosure - Investments - Summary of Municipal Debt Securities and Corporate Debt Securities (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsSummaryofMunicipalDebtSecuritiesandCorporateDebtSecuritiesDetails </Role> |
| | | <ShortName> Investments - Summary of Municipal Debt Securities and Corporate Debt Securities (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 37 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R38.htm </HtmlFileName> |
| | | <LongName> 9954485 - Disclosure - Investments - Schedule of Amortized Cost and Fair Value of Investments Available for Sale by Contractual Maturity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsScheduleofAmortizedCostandFairValueofInvestmentsAvailableforSalebyContractualMaturityDetails </Role> |
| | | <ShortName> Investments - Schedule of Amortized Cost and Fair Value of Investments Available for Sale by Contractual Maturity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 38 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R39.htm </HtmlFileName> |
| | | <LongName> 9954486 - Disclosure - Investments - Summary of Realized Gain and Loss and Investments in Unrealized Loss Position (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsSummaryofRealizedGainandLossandInvestmentsinUnrealizedLossPositionDetails </Role> |
| | | <ShortName> Investments - Summary of Realized Gain and Loss and Investments in Unrealized Loss Position (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 39 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R40.htm </HtmlFileName> |
| | | <LongName> 9954487 - Disclosure - Investments - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsNarrativeDetails </Role> |
| | | <ShortName> Investments - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 40 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R41.htm </HtmlFileName> |
| | | <LongName> 9954488 - Disclosure - Investments - Net Investment Income (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/InvestmentsNetInvestmentIncomeDetails </Role> |
| | | <ShortName> Investments - Net Investment Income (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 41 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R42.htm </HtmlFileName> |
| | | <LongName> 9954489 - Disclosure - Reinsurance - Effect on Net Premiums Written and Earned (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReinsuranceEffectonNetPremiumsWrittenandEarnedDetails </Role> |
| | | <ShortName> Reinsurance - Effect on Net Premiums Written and Earned (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 42 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R43.htm </HtmlFileName> |
| | | <LongName> 9954490 - Disclosure - Reinsurance - Quota Share Reinsurance (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReinsuranceQuotaShareReinsuranceDetails </Role> |
| | | <ShortName> Reinsurance - Quota Share Reinsurance (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 43 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R44.htm </HtmlFileName> |
| | | <LongName> 9954491 - Disclosure - Reinsurance - Excess of Loss Reinsurance Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReinsuranceExcessofLossReinsuranceNarrativeDetails </Role> |
| | | <ShortName> Reinsurance - Excess of Loss Reinsurance Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 44 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R45.htm </HtmlFileName> |
| | | <LongName> 9954492 - Disclosure - Reinsurance - Essent Guaranty's Excess of Insurance Linked Note and Loss Reinsurance Coverages and Retentions (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReinsuranceEssentGuarantysExcessofInsuranceLinkedNoteandLossReinsuranceCoveragesandRetentionsDetails </Role> |
| | | <ShortName> Reinsurance - Essent Guaranty's Excess of Insurance Linked Note and Loss Reinsurance Coverages and Retentions (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 45 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R46.htm </HtmlFileName> |
| | | <LongName> 9954493 - Disclosure - Reinsurance - Summary of Total Assets and Maximum Exposure Loss (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReinsuranceSummaryofTotalAssetsandMaximumExposureLossDetails </Role> |
| | | <ShortName> Reinsurance - Summary of Total Assets and Maximum Exposure Loss (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 46 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R47.htm </HtmlFileName> |
| | | <LongName> 9954494 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Reconciliation of Reserve Balances for Losses and Loss Adjustment Expense (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReserveforLossesandLossAdjustmentExpensesReconciliationofReserveBalancesforLossesandLossAdjustmentExpenseDetails </Role> |
| | | <ShortName> Reserve for Losses and Loss Adjustment Expenses - Reconciliation of Reserve Balances for Losses and Loss Adjustment Expense (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 47 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R48.htm </HtmlFileName> |
| | | <LongName> 9954495 - Disclosure - Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/ReserveforLossesandLossAdjustmentExpensesNarrativeDetails </Role> |
| | | <ShortName> Reserve for Losses and Loss Adjustment Expenses - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 48 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R49.htm </HtmlFileName> |
| | | <LongName> 9954496 - Disclosure - Debt Obligations (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/DebtObligationsDetails </Role> |
| | | <ShortName> Debt Obligations (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/DebtObligations </ParentRole> |
| | | <Position> 49 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R50.htm </HtmlFileName> |
| | | <LongName> 9954497 - Disclosure - Commitments and Contingencies - (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CommitmentsandContingenciesDetails </Role> |
| | | <ShortName> Commitments and Contingencies - (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/CommitmentsandContingencies </ParentRole> |
| | | <Position> 50 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R51.htm </HtmlFileName> |
| | | <LongName> 9954498 - Disclosure - Capital Stock - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CapitalStockNarrativeDetails </Role> |
| | | <ShortName> Capital Stock - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 51 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R52.htm </HtmlFileName> |
| | | <LongName> 9954499 - Disclosure - Capital Stock - Dividends (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/CapitalStockDividendsDetails </Role> |
| | | <ShortName> Capital Stock - Dividends (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 52 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R53.htm </HtmlFileName> |
| | | <LongName> 9954500 - Disclosure - Stock-Based Compensation - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StockBasedCompensationNarrativeDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 53 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R54.htm </HtmlFileName> |
| | | <LongName> 9954501 - Disclosure - Stock-Based Compensation - Summary of Nonvested Common Share and Common Share Unit Activity (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StockBasedCompensationSummaryofNonvestedCommonShareandCommonShareUnitActivityDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Summary of Nonvested Common Share and Common Share Unit Activity (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 54 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R55.htm </HtmlFileName> |
| | | <LongName> 9954502 - Disclosure - Stock-Based Compensation - Summary of Nonvested Performance-based Share Awards (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StockBasedCompensationSummaryofNonvestedPerformancebasedShareAwardsDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Summary of Nonvested Performance-based Share Awards (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 55 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R56.htm </HtmlFileName> |
| | | <LongName> 9954503 - Disclosure - Stock-Based Compensation - Summary of Compensation Expense, Net of Forfeitures (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StockBasedCompensationSummaryofCompensationExpenseNetofForfeituresDetails </Role> |
| | | <ShortName> Stock-Based Compensation - Summary of Compensation Expense, Net of Forfeitures (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 56 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R57.htm </HtmlFileName> |
| | | <LongName> 9954504 - Disclosure - Dividends Restrictions (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/DividendsRestrictionsDetails </Role> |
| | | <ShortName> Dividends Restrictions (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/DividendsRestrictions </ParentRole> |
| | | <Position> 57 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R58.htm </HtmlFileName> |
| | | <LongName> 9954505 - Disclosure - Earnings per Share (EPS) - Reconciliation of Net Income and Weighted Average Common Shares Outstanding (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/EarningsperShareEPSReconciliationofNetIncomeandWeightedAverageCommonSharesOutstandingDetails </Role> |
| | | <ShortName> Earnings per Share (EPS) - Reconciliation of Net Income and Weighted Average Common Shares Outstanding (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/EarningsperShareEPSTables </ParentRole> |
| | | <Position> 58 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R59.htm </HtmlFileName> |
| | | <LongName> 9954506 - Disclosure - Earnings per Share (EPS) - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/EarningsperShareEPSNarrativeDetails </Role> |
| | | <ShortName> Earnings per Share (EPS) - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/EarningsperShareEPSTables </ParentRole> |
| | | <Position> 59 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R60.htm </HtmlFileName> |
| | | <LongName> 9954507 - Disclosure - Earnings per Share (EPS) - Schedule of Percent of Shares Issuable Under Terms of Agreement (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/EarningsperShareEPSScheduleofPercentofSharesIssuableUnderTermsofAgreementDetails </Role> |
| | | <ShortName> Earnings per Share (EPS) - Schedule of Percent of Shares Issuable Under Terms of Agreement (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/EarningsperShareEPSTables </ParentRole> |
| | | <Position> 60 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R61.htm </HtmlFileName> |
| | | <LongName> 9954508 - Disclosure - Accumulated Other Comprehensive Income (Loss) (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AccumulatedOtherComprehensiveIncomeLossDetails </Role> |
| | | <ShortName> Accumulated Other Comprehensive Income (Loss) (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/AccumulatedOtherComprehensiveIncomeLossTables </ParentRole> |
| | | <Position> 61 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R62.htm </HtmlFileName> |
| | | <LongName> 9954509 - Disclosure - Fair Value of Financial Instruments (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/FairValueofFinancialInstrumentsDetails </Role> |
| | | <ShortName> Fair Value of Financial Instruments (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <ParentRole> http://www.essentgroup.com/role/FairValueofFinancialInstrumentsTables </ParentRole> |
| | | <Position> 62 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R63.htm </HtmlFileName> |
| | | <LongName> 9954510 - Disclosure - Statutory Accounting - Schedule of Statutory Net Income, Statutory Surplus and Contingency Reserve Liability (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StatutoryAccountingScheduleofStatutoryNetIncomeStatutorySurplusandContingencyReserveLiabilityDetails </Role> |
| | | <ShortName> Statutory Accounting - Schedule of Statutory Net Income, Statutory Surplus and Contingency Reserve Liability (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 63 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R64.htm </HtmlFileName> |
| | | <LongName> 9954511 - Disclosure - Statutory Accounting - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/StatutoryAccountingNarrativeDetails </Role> |
| | | <ShortName> Statutory Accounting - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 64 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R65.htm </HtmlFileName> |
| | | <LongName> 9954512 - Disclosure - Acquisitions - Narrative (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AcquisitionsNarrativeDetails </Role> |
| | | <ShortName> Acquisitions - Narrative (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 65 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R66.htm </HtmlFileName> |
| | | <LongName> 9954513 - Disclosure - Acquisitions - Schedule of Pro forma (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AcquisitionsScheduleofProformaDetails </Role> |
| | | <ShortName> Acquisitions - Schedule of Pro forma (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 66 </Position> |
| | | </Report> |
| | <Report instance="esnt-20230930.htm"> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R67.htm </HtmlFileName> |
| | | <LongName> 9954514 - Disclosure - Acquisitions - Schedule of Preliminary Valuation of Identifiable Assets Acquired and Liabilities Assumed (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.essentgroup.com/role/AcquisitionsScheduleofPreliminaryValuationofIdentifiableAssetsAcquiredandLiabilitiesAssumedDetails </Role> |
| | | <ShortName> Acquisitions - Schedule of Preliminary Valuation of Identifiable Assets Acquired and Liabilities Assumed (Details) </ShortName> |
| | | <MenuCategory> Details </MenuCategory> |
| | | <Position> 67 </Position> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
| | | </Report> |
| | </MyReports> |
| <InputFiles> |
| | <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="esnt-20230930.htm"> esnt-20230930.htm </File> |
| | <File> esnt-20230930.xsd </File> |
| | <File> esnt-20230930_cal.xml </File> |
| | <File> esnt-20230930_def.xml </File> |
| | <File> esnt-20230930_lab.xml </File> |
| | <File> esnt-20230930_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies> |
| | <BaseTaxonomy items="1078"> http://fasb.org/us-gaap/2023 </BaseTaxonomy> |
| | <BaseTaxonomy items="29"> http://xbrl.sec.gov/dei/2023 </BaseTaxonomy> |
| | </BaseTaxonomies> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |