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Fair Value Measurements Financial Instruments not Carried at Fair Value (Details) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Mortgage loans on real estate, interest rate 6.60% 6.60%    
Insurance policy loans interest rate 7.70% 7.70%    
Mortgage loans $ 1,521 $ 1,557    
Policy loans 42,784 39,090    
Short-term investments 2,356 2,048    
Cash and cash equivalents, at carrying value 39,830 33,255 64,425 49,723
Liability for future policy benefits individual and group annuities 50,125 47,060    
Mortgage loan maturity lower end range 1 year      
Mortgage loan maturity higher end range 30 years      
Mortgage loans interest rate used to estimate fair value 6.25%      
Fair value minimum interest rate of investment contract 0.67%      
Fair value maximum rate of investment contract 3.81%      
Carrying (Reported) Amount, Fair Value Disclosure [Member]
       
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]        
Fixed maturities held-to-maturity 203,237 227,500    
Mortgage loans 1,521 1,557    
Policy loans 42,784 39,090    
Short-term investments 2,356 2,048    
Cash and cash equivalents, at carrying value 39,830 33,255    
Liability for future policy benefits individual and group annuities 50,125 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 209,580 230,093    
Mortgage loans 1,333 1,428    
Policy loans 42,784 39,090    
Short-term investments 2,356 2,048    
Cash and cash equivalents, fair value disclosure 39,830 33,255    
Liability for future policy benefits individual and group annuities $ 52,118 $ 43,402