Note 12: Fair Value Measurement: Fair Value, Assets Measured on Recurring Basis (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Small Business Administration loan pools
Fair Value Measured on Recurring Basis	$ 50,210	$ 51,493
Mortgage servicing rights
Fair Value Measured on Recurring Basis	252	152
Interest rate swap asset
Fair Value Measured on Recurring Basis	1,928	2,112
Interest rate swap liability
Fair Value Measured on Recurring Basis	(1,915)	(2,160)
US Government Agencies Debt Securities
Fair Value Measured on Recurring Basis	30,016	30,040
Collateralized Mortgage Obligations
Fair Value Measured on Recurring Basis	4,324	4,507
Collateralized Mortgage Backed Securities
Fair Value Measured on Recurring Basis	608,915	596,086
US States and Political Subdivisions Debt Securities
Fair Value Measured on Recurring Basis	118,998	122,878
Equity Securities
Fair Value Measured on Recurring Basis	2,253	2,006
Fair Value, Inputs, Level 2 | Small Business Administration loan pools
Fair Value Measured on Recurring Basis	50,210	51,493
Fair Value, Inputs, Level 2 | US Government Agencies Debt Securities
Fair Value Measured on Recurring Basis	30,016	30,040
Fair Value, Inputs, Level 2 | Collateralized Mortgage Obligations
Fair Value Measured on Recurring Basis	4,324	4,507
Fair Value, Inputs, Level 2 | Collateralized Mortgage Backed Securities
Fair Value Measured on Recurring Basis	608,915	596,086
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities
Fair Value Measured on Recurring Basis	118,998	122,878
Fair Value, Inputs, Level 2 | Equity Securities
Fair Value Measured on Recurring Basis	2,253	2,006
Fair Value, Inputs, Level 3 | Mortgage servicing rights
Fair Value Measured on Recurring Basis	252	152
Fair Value, Inputs, Level 3 | Interest rate swap asset
Fair Value Measured on Recurring Basis	1,928	2,112
Fair Value, Inputs, Level 3 | Interest rate swap liability
Fair Value Measured on Recurring Basis	$ (1,915)	$ (2,160)