NOTE 4: EARNINGS PER SHARE: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Details
Weighted Average Number of Shares Outstanding, Basic	14,084	14,192	14,153	14,176
Net Income (Loss) Available to Common Stockholders, Basic	$ 13,203	$ 18,375	$ 28,071	$ 35,988
Earnings Per Share, Basic	$ 0.94	$ 1.29	$ 1.98	$ 2.54
Weighted Average Number of Shares Outstanding, Diluted	14,084	14,192	14,153	14,176
Net effect of dilutive stock options - based on the treasurystock method using average market price	40	122	56	122
Weighted Average Number Diluted Shares Outstanding Adjustment	14,124	14,314	14,209	14,298
Net Income (Loss) Available to Common Stockholders, Diluted	$ 13,203	$ 18,375	$ 28,071	$ 35,988
Earnings Per Share, Diluted	$ 0.93	$ 1.28	$ 1.98	$ 2.52