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Reinsurance - Excess of Loss Reinsurance (Details) - Reinsurance Policy, Type [Axis]: Mortgage Insurance | 12 Months Ended
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Dec. 31, 2023
Other Reinsurance | Essent Guaranty |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |
Amortization period | 10 years
VIE | Mortgage Insurance Linked Notes | Radnor Re |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |
Reinsurance debt issued to cover insurance term | 10 years
VIE | Radnor Re |
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items] |
Amortization period | 10 years

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