XML 44 R34.htm IDEA: XBRL DOCUMENT v3.23.1

Investments - Summary of Municipal Debt Securities and Corporate Debt Securities (Details)	Mar. 31, 2023	Dec. 31, 2022
Municipal debt securities
Investments available for sale
Percentage of debt securities	100.00%	100.00%
Municipal debt securities | Special revenue bonds
Investments available for sale
Percentage of debt securities	81.40%	79.00%
Municipal debt securities | General obligation bonds
Investments available for sale
Percentage of debt securities	18.50%	20.90%
Municipal debt securities | Certificate of participation bonds
Investments available for sale
Percentage of debt securities	0.00%	0.00%
Municipal debt securities | Tax allocation bonds
Investments available for sale
Percentage of debt securities	0.10%	0.10%
Corporate debt securities
Investments available for sale
Percentage of debt securities	100.00%	100.00%
Corporate debt securities | Financial
Investments available for sale
Percentage of debt securities	40.80%	40.50%
Corporate debt securities | Consumer, non-cyclical
Investments available for sale
Percentage of debt securities	18.50%	17.90%
Corporate debt securities | Consumer, cyclical
Investments available for sale
Percentage of debt securities	7.20%	6.80%
Corporate debt securities | Industrial
Investments available for sale
Percentage of debt securities	6.70%	6.80%
Corporate debt securities | Utilities
Investments available for sale
Percentage of debt securities	5.70%	6.10%
Corporate debt securities | Communications
Investments available for sale
Percentage of debt securities	8.60%	8.40%
Corporate debt securities | Technology
Investments available for sale
Percentage of debt securities	4.80%	4.90%
Corporate debt securities | Energy
Investments available for sale
Percentage of debt securities	5.50%	6.40%
Corporate debt securities | Basic Materials
Investments available for sale
Percentage of debt securities	2.10%	2.10%
Corporate debt securities | Government
Investments available for sale
Percentage of debt securities	0.10%	0.10%

X

- Definition

Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-12B(Column D))
-URI https://asc.fasb.org/extlink&oid=122147990&loc=d3e611197-123010

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

+ Details

Name:	us-gaap_InvestmentOwnedPercentOfNetAssets
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_SpecialRevenueMunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_GeneralObligationMunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_CertificationOfParticipationBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_TaxAllocationMunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_FinancialSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_ConsumerNoncyclicalSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_ConsumerCyclicalSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_IndustrialSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_UtilitiesSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_CommunicationsSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_TechnologyDebtSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_EnergySectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_BasicMaterialsSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_InvestmentSecondaryCategorizationAxis=esnt_GovernmentDebtSectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: