Note 10: Retirement Plans: 401(k) Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Contribution Plan, Description	The Company has three 401(k) savings plans covering all eligible employees, as defined above, which includes employer participation in accordance with the provisions of Section 401(k) of the Internal Revenue Code. The plans allow participants to make pretax contributions up to a maximum of $18,000, $18,000 and $17,500 for the years 2016, 2015 and 2014, respectively or the statutory limits.
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount	$ 18,000	$ 18,000	$ 17,500
SafeHarborPlanMember
Contribution to Retirement Plan	$ 1,429,962	$ 1,197,236	$ 899,850