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Statutory Accounting - Narrative (Details) - Affiliated Entity - USD ($) $ in Thousands		12 Months Ended
	Mar. 31, 2019	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Essent Guaranty
Dividends Restrictions
Increase (decrease) in contingency reserve		$ 226,800
Released contingency reserves		99,300	$ 56,600
Statutory net income		495,516	431,266	$ 590,505
Essent Re
Dividends Restrictions
Statutory capital and surplus		1,800,000	1,900,000
Statutory net income		$ 320,200	304,800
Essent PA
Dividends Restrictions
Statutory net income			$ (3,055)	$ 859
Essent PA | Reinsurance for mortgage insurance coverage in excess of 25%
Dividends Restrictions
Reinsurance for mortgage insurance coverage threshold (in excess of)	25.00%

X

- Definition

Threshold percentage of risk reinsured on insurance products per entity policy.

+ References

No definition available.

+ Details

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- Definition

Statutory Accounting Practices, Contingency Reserves Released

+ References

No definition available.

+ Details

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- Definition

Represents the amount of increase (decrease) in contingency reserve.

+ References

No definition available.

+ Details

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- 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/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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- Definition

The amount of statutory capital and 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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 944
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477908/944-505-50-1

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- Definition

Amount of net income for the period determined using accounting principles prescribed or permitted by insurance regulators.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(23)(c))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

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