Concentration - By State (Details)	Sep. 30, 2021	Dec. 31, 2020
California
Concentration Risk [Line Items]
Percentage of insurance policies held in specific states	18.09%	18.05%
Florida
Concentration Risk [Line Items]
Percentage of insurance policies held in specific states	15.24%	14.93%

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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