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4. Investment Securities: Contractual Maturities of Investment Securities (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Mar. 31, 2012
Available-for-sale Securities, Amortized Cost Basis $ 847 $ 976  
Available-for-sale Securities, Fair Value Disclosure 889 1,027 1,027
Available-for-sale Debt Securities, Amortized Cost Basis 718    
Available-for-sale Securities, Debt Securities 760    
Held-to-maturity Securities, Debt Maturities, within One Year, Net Carrying Amount 250    
Held-to-maturity Securities, Debt Maturities, Rolling Year Two Through Five, Fair Value 268    
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount 2,855    
Held-to-maturity Securities, Debt Maturities, Rolling Year Six Through Ten, Fair Value 2,981    
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment 10,931 11,895  
Held-to-maturity Securities, Fair Value Disclosure 11,462 12,486  
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
     
Available-for-sale Securities, Amortized Cost Basis 718 847  
Available-for-sale Securities, Fair Value Disclosure 760 898 898
Held-to-maturity Securities, Amortized Cost before Other than Temporary Impairment 7,826 8,290  
Held-to-maturity Securities, Fair Value Disclosure 8,213 8,726  
Money Market Funds
     
Available-for-sale Securities, Amortized Cost Basis 129 129  
Available-for-sale Securities, Fair Value Disclosure $ 129 $ 129 $ 129