Note 11: Capital Stock: Schedule of Activity in shares of capital stock (Details) - USD ($)	12 Months Ended			24 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Class A Common Stock
Common Stock Outstanding	13,819,006	13,109,100	12,459,240	12,459,240	11,807,287
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	42,634	23,961		54,412
Dividends	$ 657,919	$ 624,483	$ 595,020
Conversion of Stock, Shares Issued	9,353	1,416	2,521
Class C Common Stock
Common Stock Outstanding	1,902,229	1,709,640	1,394,069	1,394,069	1,330,191
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	104,975	241,652
Dividends	$ 96,967	$ 75,335	$ 66,384
Conversion of Stock, Shares Issued	(9,353)	(1,416)	(2,521)