Fair Value of Financial Instruments Fair Value Inputs (Table) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Investments in private companies, at adjusted cost	$ 4,615		$ 4,870
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	10,662	$ 10,662	10,662	$ 10,662	$ 10,662	$ 10,662
Total fixed maturities	11,076		14,541
Common stock	1,577		4,589
Total equity investments	1,577		4,589
Alternative Investment	31,564		32,211
Other investments, at cost which approximates fair value	3,316		3,721
Short-term investments, at cost which approximates fair value	151		151
Total assets	68,277		79,839
Subordinated debt, at fair value	53,614		52,105
Total liabilities	247,086		244,141
Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
Warrants	53		171
Total equity investments	1,205		3,741
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value			0
Total assets	1,205		3,741
Subordinated debt, at fair value	0		0
Total liabilities	0		0
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Real estate investments, at fair value (cost $10,225 and $10,225, respectively)	10,662		10,662
Total fixed maturities	0		0
Alternative Investment	2,330	$ 2,083	1,397	$ 1,503	$ 927	$ 939
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value			0
Total assets	12,992		12,059
Subordinated debt, at fair value			0
Total liabilities	0		0
Fair Value Measured at Net Asset Value Per Share [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Alternative Investment	21,252		20,500
Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	11,076		14,541
Warrants	372		848
Total equity investments	372		848
Alternative Investment	7,982		10,314
Total assets	22,897		29,575
Total liabilities	53,614		52,105
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Warrants	425		1,019
Long-term Debt [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total liabilities	53,614		52,105
Other Security Investments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total assets	58,346		65,875
Common Stock [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total equity investments			3,570
Corporate Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	2,520		5,427
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	2,520		5,427
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	2,526		2,876
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	2,526		2,876
US States and Political Subdivisions Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	601		626
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	0		0
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	601		626
US Government Agencies Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	5,429		5,612
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	5,429		5,612
Equity Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total equity investments			4,589
Common Stock [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Common stock	$ 1,152		$ 3,570