Note 14: Disclosures About Fair Value of Financial Instruments: Fair Value Measurement, Policy: Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	$ 19,803	$ 19,514
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	224,860	257,798
US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	78,367	85,040
Equity Securities
Assets, Fair Value Disclosure, Recurring	3,359	3,154
Mortgage Servicing Rights
Assets, Fair Value Disclosure, Recurring	166	185
Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	2,373	2,502
Interest Rate Swap Liability
Assets, Fair Value Disclosure, Recurring	(2,244)	(2,187)
Fair Value, Inputs, Level 2 | US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	19,803	19,514
Fair Value, Inputs, Level 2 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	224,860	257,798
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	78,367	85,040
Fair Value, Inputs, Level 2 | Equity Securities
Assets, Fair Value Disclosure, Recurring	3,359	3,154
Fair Value, Inputs, Level 3 | Mortgage Servicing Rights
Assets, Fair Value Disclosure, Recurring	166	185
Fair Value, Inputs, Level 3 | Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	2,373	2,502
Fair Value, Inputs, Level 3 | Interest Rate Swap Liability
Assets, Fair Value Disclosure, Recurring	$ (2,244)	$ (2,187)