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Investments (Details) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Cost $ 2,415 $ 2,208
Unrealized Gains 134 66
Unrealized Losses (190) (183)
Fair Value 2,359 2,091
Corporate Bond [Member]    
Cost 1,618 1,393
Unrealized Gains 93 43
Unrealized Losses (98) (88)
Fair Value 1,613 1,348
Mutual Funds [Member]    
Cost 27 27
Unrealized Gains
Unrealized Losses (1)
Fair Value 27 26
Preferred Securities [Member]    
Cost 97 98
Unrealized Gains 3 6
Unrealized Losses
Fair Value 100 104
Common stocks & ETF's [Member]    
Cost 673 690
Unrealized Gains 38 17
Unrealized Losses (92) (94)
Fair Value $ 619 $ 613