Reinsurance (Summary of Net Reinsurance Balances Recoverable) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 9,951,880	$ 11,280,526
Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 12,874,000
Percent of Total	100.00%
Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 9,952,000
Percent of Total	100.00%
All Other Reinsurers Including Anticipated Subrogation [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 1,531,000
Percent of Total	11.90%
All Other Reinsurers Including Anticipated Subrogation [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 1,890,000
Percent of Total	19.00%
AM Best, A++ Rating [Member] | General Reinsurance Corporation [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 677,000
Percent of Total	5.30%
AM Best, A++ Rating [Member] | General Reinsurance Corporation [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 1,334,000
Percent of Total	13.40%
AM Best, A+ Rating [Member] | Hannover Ruckversicherungs [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 1,386,000
Percent of Total	10.80%
AM Best, A+ Rating [Member] | Hannover Ruckversicherungs [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 1,318,000
Percent of Total	13.20%
AM Best, A+ Rating [Member] | Partner Reinsurance Company [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 1,362,000
Percent of Total	10.60%
AM Best, A+ Rating [Member] | Partner Reinsurance Company [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 281,000
Percent of Total	2.80%
AM Best, A+ Rating [Member] | Everest Reinsurance Company [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 1,252,000
Percent of Total	9.70%
AM Best, A+ Rating [Member] | Everest Reinsurance Company [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 781,000
Percent of Total	7.90%
AM Best, A+ Rating [Member] | Swiss Reinsurance [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 902,000
Percent of Total	7.00%
AM Best, A+ Rating [Member] | Swiss Reinsurance [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 340,000
Percent of Total	3.40%
AM Best, A+ Rating [Member] | Endurance Reinsurance [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 709,000
Percent of Total	5.50%
AM Best, A+ Rating [Member] | Endurance Reinsurance [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Percent of Total	0.00%
AM Best, A+ Rating [Member] | Axis Reinsurance Company [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 468,000
Percent of Total	3.60%
AM Best, A+ Rating [Member] | Axis Reinsurance Company [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 408,000
Percent of Total	4.10%
AM Best, A Rating [Member] | Aspen Insurance UK Ltd [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 2,219,000
Percent of Total	17.20%
AM Best, A Rating [Member] | Aspen Insurance UK Ltd [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 1,174,000
Percent of Total	11.80%
AM Best, A Rating [Member] | Platinum Underwriters [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 1,868,000
Percent of Total	14.50%
AM Best, A Rating [Member] | Platinum Underwriters [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 1,792,000
Percent of Total	18.00%
AM Best, A Rating [Member] | Allied World Reinsurance [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 500,000
Percent of Total	3.90%
AM Best, A Rating [Member] | Allied World Reinsurance [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 634,000
Percent of Total	6.40%