Investment Securities: Schedule of Held to Maturity Securities (Details) (Fair value states and political subdivisions, USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Fair value states and political subdivisions
Held to Maturity Securities Amortized Cost	$ 920	$ 1,865
Held to Maturity Securities Gross Unrealized Gains	173	236
Held to Maturity Securities Fair Value	$ 1,093	$ 2,101
Held to Maturity Securities Tax Equivalent Yield	7.37%	4.39%