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Fair Value Measurements Financial Instruments not Carried at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Mortgage loans $ 1,509 $ 1,557    
Policy loans 42,993 39,090    
Short-term investments 2,340 2,048    
Cash and cash equivalents, at carrying value 56,299 33,255 49,723 48,625
Liability for future policy benefits individual and group annuities 51,750 47,060    
Mortgage loans on real estate, interest rate 6.60% 6.60%    
Mortgage loan maturity lower end range 2 years      
Mortgage loan maturity higher end range 29 years      
Mortgage loans interest rate used to estimate fair value 6.25%      
Insurance policy loans interest rate 7.70%      
Fair value minimum interest rate of investment contract 0.10%      
Fair value maximum rate of investment contract 3.80%      
Carrying (Reported) Amount, Fair Value Disclosure [Member]
       
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fixed maturities held-to-maturity 187,008 227,500    
Mortgage loans 1,509 1,557    
Policy loans 42,993 39,090    
Short-term investments 2,340 2,048    
Cash and cash equivalents, at carrying value 56,299 33,255    
Liability for future policy benefits individual and group annuities 51,750 47,060    
Estimate of Fair Value, Fair Value Disclosure [Member]
       
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fixed maturities held-to-maturity 193,739 230,093    
Mortgage loans 1,503 1,428    
Policy loans 42,993 39,090    
Short-term investments 2,340 2,048    
Cash and cash equivalents, fair value disclosure 56,299 33,255    
Liability for future policy benefits individual and group annuities $ 54,981 $ 43,402