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, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Details
Weighted Average Number of Shares Outstanding, Basic	14,192	14,125	14,176	14,113
Net Income (Loss) Available to Common Stockholders, Basic	$ 18,375	$ 13,839	$ 35,988	$ 27,305
Earnings Per Share, Basic	$ 1.29	$ 0.98	$ 2.54	$ 1.93
Weighted Average Number of Shares Outstanding, Diluted	14,192	14,125	14,176	14,113
Net effect of dilutive stock options - based on the treasurystock method using average market price	122	153	122	153
Weighted Average Number Diluted Shares Outstanding Adjustment	14,314	14,278	14,298	14,266
Net Income (Loss) Available to Common Stockholders, Diluted	$ 18,375	$ 13,839	$ 35,988	$ 27,305
Earnings Per Share, Diluted	$ 1.28	$ 0.97	$ 2.52	$ 1.91