Marketable Securities (Details 1) $ in Thousands	Dec. 31, 2015 USD ($) Number	Dec. 31, 2014 USD ($) Number
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total Number In Loss Position | Number	2	2
Fair Value [Abstract]
Less Than 12 Months	$ 2,834	$ 5,928
12 Months or Greater	2,041	8,024
Unrealized Losses [Abstract]
Less Than 12 Months	(159)	(106)
12 Months or Greater	(21)	(54)
Totals [Abstract]
Total Fair Values	4,875	13,952
Total Unrealized Losses	$ (180)	$ (160)
Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total Number In Loss Position | Number	2	2
Fair Value [Abstract]
Less Than 12 Months	$ 2,834	$ 5,928
12 Months or Greater	2,041	8,024
Unrealized Losses [Abstract]
Less Than 12 Months	(159)	(106)
12 Months or Greater	(21)	(54)
Totals [Abstract]
Total Fair Values	4,875	13,952
Total Unrealized Losses	$ (180)	$ (160)