Marketable Securities (Details 1) $ in Thousands	Dec. 31, 2015 USD ($) Number
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total number in loss position | Number	2
Fair Value [Abstract]
Less Than 12 Months	$ 2,834
12 Months or Greater	2,041
Unrealized Losses [Abstract]
Less Than 12 Months	(159)
12 Months or Greater	(21)
Totals [Abstract]
Total Fair Values	4,875
Total Unrealized Losses	$ (180)
Mutual Funds [Member]
Schedule of Trading Securities and Other Trading Assets [Line Items]
Total number in loss position | Number	2
Fair Value [Abstract]
Less Than 12 Months	$ 2,834
12 Months or Greater	2,041
Unrealized Losses [Abstract]
Less Than 12 Months	(159)
12 Months or Greater	(21)
Totals [Abstract]
Total Fair Values	4,875
Total Unrealized Losses	$ (180)