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Investments (Major Categories of Investment Gains and Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Gain (Loss) on Investments [Line Items]    
Net realized investment gains (losses) $ 503 $ 100
Fixed Maturities [Member]    
Gain (Loss) on Investments [Line Items]    
Net realized investment gains (losses) 536 478
Other, Principally Real Estate [Member]    
Gain (Loss) on Investments [Line Items]    
Net realized investment gains (losses) $ (33) $ (378)