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Note 4. Investment Securities: Investments Classified by Contractual Maturity Date (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Details    
Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Amortized Cost Basis $ 2,350  
Available-for-sale Securities, Debt Maturities, Next Rolling Twelve Months, Fair Value 2,635  
Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Amortized Cost Basis 54,528  
Available-for-sale Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value 55,024  
Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Amortized Cost Basis 183,314  
Available-for-sale Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value 178,605  
Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Amortized Cost Basis 279,616  
Available-for-sale Securities, Debt Maturities, Rolling after Year Ten, Fair Value 274,308  
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis 35,985  
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value 36,135  
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis 555,793  
Fixed maturities, available-for-sale $ 546,707 $ 719,602