Reinsurance - Narrative (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Sep. 30, 2018
Effects of Reinsurance [Line Items]
Reinsurance reinstatement costs	$ 90,000	$ 433,000
Property Risk | Maximum
Effects of Reinsurance [Line Items]
Amount retained (excess of)		300,000	$ 300,000
Liability Risk | Maximum
Effects of Reinsurance [Line Items]
Amount retained (excess of)		$ 400,000	$ 500,000