Note 12: Stock Compensation Plans: Schedule of Activity of the 1993 Plan (Details) (1993 Stock Incentive Plan, USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Minimum
Option Price	3.61	2.62	1.47	1.54
Maximum
Option Price	3.80	3.80	3.99	4.19
Class A Common Stock
Shares, Outstanding	43,245	298,786	306,548	291,950
Adjustment for the effect of stock dividends	582	14,228	14,598
Shares exercised	(238,755)
Shares cancelled	(17,368)	(21,990)
Shares Exercisable	43,245
Weighted average contractual term of options, years		1.2
Aggregated intrinsic value of options outstanding	199,519