Unpaid Losses and Settlement Expenses (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Liability for Future Policy Benefit, by Product Segment [Line Items]
Increase in net unpaid losses and settlement expense	$ 1,323,000
Increase in net unpaid losses and settlement expense, percent	3.00%
Liquor Liability And Business Owners Liability [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Increase in net unpaid losses and settlement expense	$ 2,338,000
Liquor Liability And Umbrella Liability [Member]
Liability for Future Policy Benefit, by Product Segment [Line Items]
Increase in net unpaid losses and settlement expense		$ 1,811,000