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Reinsurance - Essent Guaranty's Excess of Loss Reinsurance Coverages and Retentions (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Reinsurance in Force	$ 1,164,043
Radnor Re, Total
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	136,680,377
Remaining Risk in Force	36,669,308
Remaining Reinsurance in Force	1,164,043
Remaining First Layer Retention	$ 1,355,706
Radnor Re 2019-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Retired percent	100.00%
Radnor Re 2020-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Retired percent	99.00%
OXL
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	$ 82,868,070
Remaining Risk in Force	22,297,808
Remaining Reinsurance in Force	254,539
Remaining First Layer Retention	965,220
Reinsurance Policy, Type [Axis]: Vintage August 2022- June 2023 | Radnor Re 2023-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	30,639,242
Remaining Risk in Force	8,380,934
Remaining Reinsurance in Force	281,462
Remaining First Layer Retention	281,463
Reinsurance Policy, Type [Axis]: Vintage Year Aug 2020 - Mar 2021 | Radnor Re 2021-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	31,673,378
Remaining Risk in Force	8,233,067
Remaining Reinsurance in Force	309,199
Remaining First Layer Retention	278,638
Reinsurance Policy, Type [Axis]: Vintage Year Oct 2021 - Jul 2022 | Radnor Re 2022-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	31,520,927
Remaining Risk in Force	8,522,229
Remaining Reinsurance in Force	231,142
Remaining First Layer Retention	303,324
Reinsurance Policy, Type [Axis]: Vintage Year Apr 2021 - Sep 2021 | Radnor Re 2021-2
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	35,958,961
Remaining Risk in Force	9,735,395
Remaining Reinsurance in Force	339,890
Remaining First Layer Retention	279,051
Reinsurance Policy, Type [Axis]: Vintage Year Jan 2018 - Dec 2018 | XOL 2019-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	5,503,086
Remaining Risk in Force	1,441,695
Remaining Reinsurance in Force	76,144
Remaining First Layer Retention	245,894
Reinsurance Policy, Type [Axis]: Vintage Year Jan 2019 - Aug 2019 | Radnor Re 2020-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	6,887,869
Remaining Risk in Force	1,797,683
Remaining Reinsurance in Force	2,350
Remaining First Layer Retention	213,230
Reinsurance Policy, Type [Axis]: Vintage Year Jan 2019 - Dec 2019 | Radnor Re 2020-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Reinsurance in Force	2,350
Reinsurance Policy, Type [Axis]: Vintage Year Jan 2019 - Dec 2019 | XOL 2020-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	6,887,869
Remaining Risk in Force	1,797,683
Remaining Reinsurance in Force	36,403
Remaining First Layer Retention	213,143
Reinsurance Policy, Type [Axis]: Vintage Year Oct 2021 - Dec 2022 | XOL 2022-1
SEC Schedule, 12-17, Insurance Companies, Reinsurance [Line Items]
Remaining Insurance in Force	70,477,115
Remaining Risk in Force	19,058,430
Remaining Reinsurance in Force	141,992
Remaining First Layer Retention	$ 506,183

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-Number 210
-Section 12
-Subsection 17
-Publisher SEC

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Amount per life of risk undertaken originally by insurer that is not ceded to reinsurer.

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