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Investments, Part V (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Carrying Value [Abstract]    
Due in one year or less $ 1,510 $ 1,263
Due after one year through five years 5,799 7,207
Due after five years through ten years 40,416 32,052
Due after ten years 181,608 175,676
Varying maturities 1,175 1,150
Totals 230,508 217,348
Amortized Cost [Abstract]    
Due in one year or less 1,500 1,250
Due after one year through five years 5,213 6,742
Due after five years through ten years 37,013 31,008
Due after ten years 157,266 158,512
Varying maturities 994 994
Totals 201,986 198,506
Investment income earned [Abstract]    
Total investment income 11,504 10,587
Less investment expenses (194) (177)
Net investment income 11,310 10,410
Summary of realized investment gains (losses) [Abstract]    
Gains 1,434 1,195
Losses 0 (1,168)
Realized investment gains (losses), net 1,434 27
Proceeds from sales of investments [Abstract]    
Total proceeds 24,479 39,452
Percentage of investment grade securities in bond portfolio (in hundredths) 98.00%  
Fixed maturities [Member]
    
Investment income earned [Abstract]    
Total investment income 10,626 9,874
Summary of realized investment gains (losses) [Abstract]    
Gains 1,434 860
Losses 0 (978)
Realized investment gains (losses), net 1,434 (118)
Proceeds from sales of investments [Abstract]    
Total proceeds 24,433 37,910
Equity securities [Member]
    
Investment income earned [Abstract]    
Total investment income 571 509
Summary of realized investment gains (losses) [Abstract]    
Gains 0 0
Losses 0 (190)
Realized investment gains (losses), net 0 (190)
Proceeds from sales of investments [Abstract]    
Total proceeds 0 813
Other invested assets [Member]
    
Summary of realized investment gains (losses) [Abstract]    
Gains 0 335
Losses 0 0
Realized investment gains (losses), net 0 335
Other investments [Member]
    
Investment income earned [Abstract]    
Total investment income 307 204
Proceeds from sales of investments [Abstract]    
Total proceeds $ 46 $ 729