Note 15: Income Taxes: Schedule of Effective Income Tax Rate Reconciliation (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Details
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	(2.10%)	(2.40%)	(3.00%)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(7.30%)	(8.10%)	(9.50%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	1.10%	1.40%	1.50%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent		(0.80%)
Effective Income Tax Rate Reconciliation	26.70%	25.10%	24.00%