Investments (Details 2) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	$ 22,067
Less Than 12 Months, Unrealized Losses	(244)
Greater than 12 Months, Fair Value	126
Greater than 12 Months, Unrealized Losses	(1)
Total Fair Value	22,193
Total Unrealized Losses	(245)
Fixed Income Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	21,810	$ 18,344
Less Than 12 Months, Unrealized Losses	(203)	(271)
Greater than 12 Months, Fair Value	126	460
Greater than 12 Months, Unrealized Losses	(1)	(3)
Total Fair Value	21,936	18,804
Total Unrealized Losses	(204)	(274)
Fixed Income Securities [Member] | U.S. government [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	1,306	1,303
Less Than 12 Months, Unrealized Losses	(14)	(20)
Total Fair Value	1,306	1,303
Total Unrealized Losses	(14)	(20)
Fixed Income Securities [Member] | States, Municipalities and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	2,363	1,537
Less Than 12 Months, Unrealized Losses	(26)	(27)
Total Fair Value	2,363	1,537
Total Unrealized Losses	(26)	(27)
Fixed Income Securities [Member] | Asset-backed Securities and Collateralized Mortgage Backed Obligations [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	11,408	9,552
Less Than 12 Months, Unrealized Losses	(115)	(133)
Greater than 12 Months, Fair Value	126	460
Greater than 12 Months, Unrealized Losses	(1)	(3)
Total Fair Value	11,534	10,012
Total Unrealized Losses	(116)	(136)
Fixed Income Securities [Member] | Corporate [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	6,733	5,952
Less Than 12 Months, Unrealized Losses	(48)	(91)
Total Fair Value	6,733	5,952
Total Unrealized Losses	(48)	$ (91)
Equity Securities [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	257
Less Than 12 Months, Unrealized Losses	(41)
Total Fair Value	257
Total Unrealized Losses	(41)
Equity Securities [Member] | Common Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	226
Less Than 12 Months, Unrealized Losses	(36)
Total Fair Value	226
Total Unrealized Losses	(36)
Equity Securities [Member] | Warrants to Purchase Common Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	13
Less Than 12 Months, Unrealized Losses	(2)
Total Fair Value	13
Total Unrealized Losses	(2)
Equity Securities [Member] | Rights to Purchase Common Stock [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, fair Value	18
Less Than 12 Months, Unrealized Losses	(3)
Total Fair Value	18
Total Unrealized Losses	$ (3)