Reinsurance - Excess of Loss Reinsurance (Details) - USD ($) $ in Thousands					3 Months Ended	12 Months Ended
	Feb. 02, 2021	Oct. 29, 2020	May 25, 2019	Oct. 30, 2018	Mar. 31, 2021	Dec. 31, 2020
Home Re 2021-1
Effects of Reinsurance [Line Items]
Remaining First Layer Retention	$ 211,159				$ 211,159	$ 0
Remaining Excess of Loss Reinsurance Coverage	$ 398,848				398,848	0
Home Re 2020-1
Effects of Reinsurance [Line Items]
Remaining First Layer Retention		$ 275,283			275,268	275,283
Remaining Excess of Loss Reinsurance Coverage		$ 412,917			412,917	412,917
Home Re 2019-1
Effects of Reinsurance [Line Items]
Remaining First Layer Retention			$ 185,730		184,391	184,514
Remaining Excess of Loss Reinsurance Coverage			$ 315,739		208,146	208,146
Home Re 2018-1
Effects of Reinsurance [Line Items]
Remaining First Layer Retention				$ 168,691	165,765	166,005
Remaining Excess of Loss Reinsurance Coverage				$ 318,636	$ 218,343	$ 218,343