Investments (Details 2) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, Fair Value	$ 18,826	$ 18,344
Less Than 12 Months, Unrealized Losses	(233)	(271)
Greater than 12 Months, Fair Value	527	460
Greater than 12 Months, Unrealized Losses	(2)	(3)
Total Fair Value	19,353	18,804
Total Unrealized Losses	(235)	(274)
U.S. government [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, Fair Value	1,304	1,303
Less Than 12 Months, Unrealized Losses	(18)	(20)
Total Fair Value	1,304	1,303
Total Unrealized Losses	(18)	(20)
States, Municipalities and Political Subdivisions [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, Fair Value	1,466	1,537
Less Than 12 Months, Unrealized Losses	(21)	(27)
Total Fair Value	1,466	1,537
Total Unrealized Losses	(21)	(27)
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	9,841	9,552
Less Than 12 Months, Unrealized Losses	(128)	(133)
Greater than 12 Months, Fair Value	487	460
Greater than 12 Months, Unrealized Losses	(2)	(3)
Total Fair Value	10,328	10,012
Total Unrealized Losses	(131)	(136)
Corporate [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Less Than 12 Months, Fair Value	6,215	5,952
Less Than 12 Months, Unrealized Losses	(65)	(91)
Greater than 12 Months, Fair Value	40
Total Fair Value	6,255	5,952
Total Unrealized Losses	$ (65)	$ (91)