Reinsurance (Summary of Net Reinsurance Balances Recoverable) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 10,960,325	$ 10,118,373
Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 15,915,000
Percent of Total	100.00%
Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 10,960,000
Percent of Total	100.10%
All Other Reinsurers Including Anticipated Subrogation [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 2,206,000
Percent of Total	13.90%
All Other Reinsurers Including Anticipated Subrogation [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 3,277,000
Percent of Total	29.90%
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	$ 774,000
Percent of Total	4.90%
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	$ 1,537,000
Percent of Total	14.00%
AM Best, A+ Rating [Member] | Platinum Underwriters [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 2,901,000
Percent of Total	18.20%
AM Best, A+ Rating [Member] | Platinum Underwriters [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 2,317,000
Percent of Total	21.10%
AM Best, A+ Rating [Member] | Hannover Ruckversicherungs [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 2,073,000
Percent of Total	13.00%
AM Best, A+ Rating [Member] | Hannover Ruckversicherungs [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 1,274,000
Percent of Total	11.60%
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	$ 1,514,000
Percent of Total	9.50%
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	$ 303,000
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	$ 1,196,000
Percent of Total	7.50%
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	$ 271,000
Percent of Total	2.50%
AM Best, A+ Rating [Member] | Swiss Reinsurance [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 1,162,000
Percent of Total	7.30%
AM Best, A+ Rating [Member] | Swiss Reinsurance [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 286,000
Percent of Total	2.60%
AM Best, A+ Rating [Member] | Endurance Reinsurance [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 867,000
Percent of Total	5.40%
AM Best, A+ Rating [Member] | Endurance Reinsurance [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 306,000
Percent of Total	2.80%
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	$ 1,824,000
Percent of Total	11.50%
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	$ 292,000
Percent of Total	2.70%
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	$ 742,000
Percent of Total	4.70%
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	$ 270,000
Percent of Total	2.60%
AM Best, A Rating [Member] | Liberty Mutual Insurance Company [Member] | Net Reinsurer Exposure [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Net Reinsurer Exposure	$ 656,000
Percent of Total	4.10%
AM Best, A Rating [Member] | Liberty Mutual Insurance Company [Member] | Ceded Premiums Written [Member] | Reinsurer Concentration Risk [Member]
Ceded Credit Risk [Line Items]
Ceded Premiums Written	$ 827,000
Percent of Total	7.50%