Note 15: Disclosures About Fair Value of Financial Instruments: Fair Value, Assets Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	$ 19,781	$ 19,514
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	161,214	257,798
US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	78,031	85,040
Other securities
Assets, Fair Value Disclosure, Recurring	3,830	3,154
Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	2,711	2,502
Interest Rate Swap Liability
Assets, Fair Value Disclosure, Recurring	(2,725)	(2,187)
Fair Value, Inputs, Level 2 | US Government Agencies Debt Securities
Assets, Fair Value Disclosure, Recurring	19,781	19,514
Fair Value, Inputs, Level 2 | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises
Assets, Fair Value Disclosure, Recurring	161,214	257,798
Fair Value, Inputs, Level 2 | US States and Political Subdivisions Debt Securities
Assets, Fair Value Disclosure, Recurring	78,031	85,040
Fair Value, Inputs, Level 2 | Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring	2,711
Fair Value, Inputs, Level 2 | Interest Rate Swap Liability
Assets, Fair Value Disclosure, Recurring	$ (2,725)
Fair Value, Inputs, Level 3 | Interest Rate Swap Asset
Assets, Fair Value Disclosure, Recurring		2,502
Fair Value, Inputs, Level 3 | Interest Rate Swap Liability
Assets, Fair Value Disclosure, Recurring		$ (2,187)