Note 13: Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Details
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	(1.90%)	(2.80%)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(6.40%)	(8.70%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	1.10%	1.10%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	(1.70%)	0.50%
Effective Income Tax Rate Reconciliation, Percent	26.10%	25.10%