Reinsurance - Excess of Loss Reinsurance (Details)	3 Months Ended	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2023
Radnor Re 2019-1 Ltd.
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Retired percent	90.00%
Radnor Re 2020-1 Ltd.
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Retired percent	90.00%
Reinsurance Policy, Type [Axis]: Mortgage Insurance | Other Reinsurance | Essent Guaranty
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Amortization period		10 years
Reinsurance Policy, Type [Axis]: Mortgage Insurance | VIE | Mortgage Insurance Linked Notes | Radnor Re
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Reinsurance retention policy, debt issued to cover insurance, term		10 years
Reinsurance Policy, Type [Axis]: Mortgage Insurance | VIE | Radnor Re
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Amortization period		10 years