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Investment Securities: Schedule of Held to Maturity Securities, Contractual maturities (Details) (InvestmentSecuritiesMember, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
InvestmentSecuritiesMember
 
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis $ 2,773
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value 1,204
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis 7,773
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value $ 6,204