NOTE 4: EARNINGS PER SHARE: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Details
Weighted Average Number of Shares Outstanding, Basic	14,038	13,914	14,007	13,906
Net Income (Loss) Available to Common Stockholders, Basic	$ 11,663	$ 11,221	$ 39,358	$ 33,548
Earnings Per Share, Basic	$ 0.83	$ 0.81	$ 2.81	$ 2.41
Weighted Average Number of Shares Outstanding, Diluted	14,038	13,914	14,007	13,906
Net effect of dilutive stock options - based on the treasurystock method using average market price	186	140	186	140
Weighted Average Number Diluted Shares Outstanding Adjustment	14,224	14,054	14,193	14,046
Net Income (Loss) Available to Common Stockholders, Diluted	$ 11,663	$ 11,221	$ 39,358	$ 33,548
Earnings Per Share, Diluted	$ 0.82	$ 0.80	$ 2.77	$ 2.39
Net Income (Loss) Available to Common Stockholders, Basic	$ 11,663	$ 11,221	$ 39,358	$ 33,548