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Dividends Restrictions (Details) - USD ($)	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Dividends Restrictions
Total equity	$ 4,648,941,000	$ 4,215,068,000	$ 4,462,309,000
Affiliated Entity | Essent Guaranty
Dividends Restrictions
Unassigned surplus	286,800,000
Dividends paid to parent company	90,000,000	100,000,000
Affiliated Entity | Essent PA
Dividends Restrictions
Unassigned surplus	14,100,000
Dividends paid to parent company	0	$ 0
Amount available for dividend distribution	5,300,000
Affiliated Entity | Essent Re
Dividends Restrictions
Total equity	1,600,000,000
Affiliated Entity | Essent Re | Minimum | Quota share reinsurance
Dividends Restrictions
Total equity	$ 100,000,000

X

- Definition

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

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- 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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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- Definition

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

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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.

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- Definition

Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
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