Note 12: Income Taxes: Schedule of Components of Income Tax Expense (Benefit) (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Details
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	35.00%	35.00%	35.00%	35.00%
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Percent	(1.60%)	(1.80%)	(2.10%)	(2.40%)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent	(6.50%)	(8.00%)	(7.50%)	(8.10%)
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent	1.10%	1.30%	1.10%	1.10%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	0.30%	(0.40%)	0.40%	(0.10%)
Effective Income Tax Rate Reconciliation, Percent	28.30%	26.10%	26.90%	25.50%