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Investments - Schedule of Realized Gain (Loss) (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Gains (Losses)    
Gross realized gains $ 99 $ 1,055
Gross realized losses (450) (785)
Net realized gains (losses) (351) 270
Fair Value at Sale    
Fair value at sale 12,586 25,342
Fair value at sale 23,548 15,171
Net fair value at sale 36,134 40,513
Fixed Maturities    
Gains (Losses)    
Gross realized gains 99 1,055
Gross realized losses (450) (678)
Fair Value at Sale    
Fair value at sale 12,586 25,342
Fair value at sale 23,548 9,162
Equity Securities    
Gains (Losses)    
Gross realized gains 0 0
Gross realized losses 0 (107)
Fair Value at Sale    
Fair value at sale 0 0
Fair value at sale $ 0 $ 6,009