Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	$ 17,255	$ 30,040
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	367,578	596,086
Small Business Administration Loan Pools
Assets, Fair Value Disclosure, Recurring	44,855	51,493
US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	122,724	122,878
Equity Securities
Assets, Fair Value Disclosure, Recurring	2,869	2,006
Mortgage Servicing Rights
Assets, Fair Value Disclosure, Recurring	211	152
Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	2,544
Interest Rate Derivative Liability
Assets, Fair Value Disclosure, Recurring	(1,613)	(2,160)
Collateralized Mortgage Backed Securities
Assets, Fair Value Disclosure, Recurring		4,507
Interest Rate Derivative Asset
Assets, Fair Value Disclosure, Recurring		2,112
Fair Value, Inputs, Level 2 | US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	17,255	30,040
Fair Value, Inputs, Level 2 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	367,578	596,086
Fair Value, Inputs, Level 2 | Small Business Administration Loan Pools
Assets, Fair Value Disclosure, Recurring	44,855	51,493
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	122,724	122,878
Fair Value, Inputs, Level 2 | Equity Securities
Assets, Fair Value Disclosure, Recurring	2,869	2,006
Fair Value, Inputs, Level 2 | Collateralized Mortgage Backed Securities
Assets, Fair Value Disclosure, Recurring		4,507
Fair Value, Inputs, Level 3 | Mortgage Servicing Rights
Assets, Fair Value Disclosure, Recurring	211	152
Fair Value, Inputs, Level 3 | Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	2,544
Fair Value, Inputs, Level 3 | Interest Rate Derivative Liability
Assets, Fair Value Disclosure, Recurring	(1,613)	(2,160)
Fair Value, Inputs, Level 3 | Interest Rate Derivative Asset
Assets, Fair Value Disclosure, Recurring		$ 2,112