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Investments (Details 3) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Investment income:        
Gross investment income $ 95 $ 28 $ 175 $ 35
Investment expenses (16) (4) (18) (7)
Net investment income 79 24 157 28
Fixed Income Securities [Member]        
Investment income:        
Gross investment income 65 $ 19 117 $ 26
Cash and Cash Equivalents [Member]        
Investment income:        
Gross investment income $ 30   $ 58  
Other        
Investment income:        
Gross investment income   $ 9   $ 9