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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, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Details
Weighted Average Number of Shares Outstanding, Basic	14,146	14,038	14,124	14,007
Net Income (Loss) Available to Common Stockholders, Basic	$ 22,516	$ 11,663	$ 49,821	$ 39,358
Earnings Per Share, Basic	$ 1.59	$ 0.83	$ 3.53	$ 2.81
Weighted Average Number of Shares Outstanding, Diluted	14,146	14,038	14,124	14,007
Net effect of dilutive stock options - based on the treasurystock method using average market price	153	186	136	186
Weighted Average Number Diluted Shares Outstanding Adjustment	14,299	14,224	14,260	14,193
Net Income (Loss) Available to Common Stockholders, Diluted	$ 22,516	$ 11,663	$ 49,821	$ 39,358
Earnings Per Share, Diluted	$ 1.57	$ 0.82	$ 3.49	$ 2.77

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