Reinsurance - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Effects Of Reinsurance [Line Items]
Ceded premium written	$ 6,449,000	$ 4,480,000	$ 12,339,000	$ 8,513,000
Ceded premiums earned	$ 5,390,000	$ 4,201,000	$ 10,802,000	8,237,000
Minimum
Effects Of Reinsurance [Line Items]
Reinsurance retention policy, reinsured percentage			40.00%
Maximum
Effects Of Reinsurance [Line Items]
Reinsurance retention policy, reinsured percentage			60.00%
Maximum | Homeowners Lines
Effects Of Reinsurance [Line Items]
Amount retained (excess of)			$ 300,000	300,000
Property Risk
Effects Of Reinsurance [Line Items]
Amount retained (excess of)			200,000
Property Risk | Maximum
Effects Of Reinsurance [Line Items]
Amount retained (excess of)			400,000	300,000
Liability Risk | Maximum
Effects Of Reinsurance [Line Items]
Amount retained (excess of)			$ 400,000	$ 400,000