Fair Value of Financial Instruments Fair Value Inputs (Table) (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Investments in private companies, at adjusted cost	$ 4,620		$ 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	11,361		14,541
Common stock	2,433		4,589
Total equity investments	2,433		4,589
Limited liability investments, at fair value	31,416		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	71,037		79,839
Subordinated debt, at fair value	52,822		52,105
Total liabilities	237,792		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	71		171
Total equity investments	1,562		3,741
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value			0
Total assets	1,562		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
Limited liability investments, at fair value	2,083	$ 1,634	1,397	$ 927	$ 1,008	$ 939
Other investments, at cost which approximates fair value	0		0
Short-term investments, at cost which approximates fair value			0
Total assets	12,745		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)
Limited liability investments, at fair value	20,835		20,500
Fair Value, Inputs, Level 2 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	11,361		14,541
Warrants	871		848
Total equity investments	871		848
Limited liability investments, at fair value	8,498		10,314
Other investments, at cost which approximates fair value			3,721
Short-term investments, at cost which approximates fair value			151
Total assets	24,197		29,575
Subordinated debt, at fair value			52,105
Total liabilities	52,822		52,105
Fair Value, Inputs, Level 1, 2 and 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Warrants	942		1,019
Long-term Debt [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total liabilities	52,822		52,105
Other Security Investments [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total assets	59,339		65,875
US States and Political Subdivisions Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	605		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	605		626
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	2,811		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	2,811		2,876
Corporate Debt Securities [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total fixed maturities	2,518		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	2,518		5,427
Common Stock [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items] (Deprecated 2018-01-31)
Total equity investments			3,570
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	$ 1,491		$ 3,570