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Investments, Part IV (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Liabilities measured at fair value on a recurring basis [Abstract]    
Contractual rate (in hundredths) 4.77%  
Percentage of basis spread on variable rate (in hundredths) 0.47%  
Derivative [Member]
   
Liabilities measured at fair value on a recurring basis [Abstract]    
Balance, December 31, 2011 $ (723) $ (876)
Total unrealized gains (losses) included in comprehensive income 193 153
Balance, June 30, 2012 (530) (723)
Fixed maturities [Member]
   
Assets measured at fair value on a recurring basis [Abstract]    
Balance, December 31, 2011 1,974 2,035
Total unrealized gains (losses) included in comprehensive income 125 (61)
Balance, June 30, 2012 $ 2,099 $ 1,974