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Schedule II - Condensed Financial Information of Registrant - Supplementary Notes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2023
Related Party
Condensed Financial Information of Registrant
Dividends paid to parent company	$ 60,000,000	$ 0	$ 0
Essent Guaranty | Affiliated Entity
Condensed Financial Information of Registrant
Dividends paid to parent company	295,000,000	315,000,000	247,200,000
Essent Guaranty | Related Party
Condensed Financial Information of Registrant
Unassigned surplus	298,800,000
Amount available for dividend distribution				$ 298,800,000
Essent PA | Affiliated Entity
Condensed Financial Information of Registrant
Dividends paid to parent company	0	$ 5,000,000	$ 0
Essent PA | Related Party
Condensed Financial Information of Registrant
Unassigned surplus	$ 15,000,000
Amount available for dividend distribution				$ 5,400,000

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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 04
-Paragraph a
-Publisher SEC

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 5
-Subsection 04
-Paragraph c
-Subparagraph Schedule I
-Publisher SEC

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 7
-Subsection 05
-Paragraph c
-Subparagraph Schedule II
-Publisher SEC

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 9
-Subsection 06
-Publisher SEC

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

Reference 6: http://www.xbrl.org/2003/role/recommendedDisclosureRef
-Topic 810
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481231/810-10-45-11

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X

- Definition

The amount of dividends that can be declared or paid without affecting the banking or savings institution's regulatory capital position.

+ References

No definition available.

+ Details

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X

- Definition

This element represents disclosure of the aggregate cash dividends paid to the entity by consolidated subsidiaries.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 3
-Subparagraph (SX 210.12-04(b))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3

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X

- Definition

Amount of statutory capital and surplus computed using prescribed or permitted statutory accounting practice.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479989/944-505-50-1

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