Note 11: Capital Stock: Schedule of Activity in shares of capital stock (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class A Common Stock
Common Stock Outstanding	13,109,100	12,459,240	11,807,287	10,843,576
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	23,961	54,412	359,786
Dividends	$ 624,483	$ 595,020	$ 562,152
Conversion of Stock, Shares Issued	1,416	2,521	41,773
Class C Common Stock
Common Stock Outstanding	1,709,640	1,394,069	1,330,191	1,097,410
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	241,652		211,211
Dividends	$ 75,335	$ 66,384	$ 63,342
Conversion of Stock, Shares Issued	(1,416)	(2,521)	(41,773)