Note 12: Fair Value Measurement: Fair Value, Assets Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
US Government Agencies Debt Securities
Fair Value Measured on Recurring Basis	$ 17,974	$ 17,255
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Fair Value Measured on Recurring Basis	343,314	367,578
Small Business Administration Loan Pools
Fair Value Measured on Recurring Basis	40,990	44,855
US States and Political Subdivisions Debt Securities
Fair Value Measured on Recurring Basis	126,867	122,724
Equity Securities
Fair Value Measured on Recurring Basis	2,965	2,869
Mortgage Servicing Rights
Fair Value Measured on Recurring Basis	200	211
Interest Rate Swap Asset
Fair Value Measured on Recurring Basis	2,361	2,544
Interest Rate Swap Liability
Fair Value Measured on Recurring Basis	(1,597)	(1,613)
Fair Value, Inputs, Level 2 | US Government Agencies Debt Securities
Fair Value Measured on Recurring Basis	17,974	17,255
Fair Value, Inputs, Level 2 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Fair Value Measured on Recurring Basis	343,314	367,578
Fair Value, Inputs, Level 2 | Small Business Administration Loan Pools
Fair Value Measured on Recurring Basis	40,990	44,855
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities
Fair Value Measured on Recurring Basis	126,867	122,724
Fair Value, Inputs, Level 2 | Equity Securities
Fair Value Measured on Recurring Basis	2,965	2,869
Fair Value, Inputs, Level 3 | Mortgage Servicing Rights
Fair Value Measured on Recurring Basis	200	211
Fair Value, Inputs, Level 3 | Interest Rate Swap Asset
Fair Value Measured on Recurring Basis	2,361	2,544
Fair Value, Inputs, Level 3 | Interest Rate Swap Liability
Fair Value Measured on Recurring Basis	$ (1,597)	$ (1,613)