Note 13: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets Measured on Recurring Basis (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	$ 19,586	$ 19,514
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	240,991	257,798
US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	80,298	85,040
Equity Securities
Assets, Fair Value Disclosure, Recurring	3,209	3,154
Mortgage Servicing Rights
Assets, Fair Value Disclosure, Recurring	179	185
Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	3,356	2,502
Interest Rate Swap Liability
Assets, Fair Value Disclosure, Recurring	$ (3,296)	$ (2,187)