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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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Details
Weighted Average Number of Shares Outstanding, Basic	14,210	14,146	14,187	14,124
Net Income (Loss) Available to Common Stockholders, Basic	$ 19,732	$ 22,516	$ 55,720	$ 49,821
Earnings Per Share, Basic	$ 1.39	$ 1.59	$ 3.93	$ 3.53
Weighted Average Number of Shares Outstanding, Diluted	14,210	14,146	14,187	14,124
Net effect of dilutive stock options - based on the treasurystock method using average market price	107	153	110	136
Weighted Average Number Diluted Shares Outstanding Adjustment	14,317	14,299	14,297	14,260
Net Income (Loss) Available to Common Stockholders, Diluted	$ 19,732	$ 22,516	$ 55,720	$ 49,821
Earnings Per Share, Diluted	$ 1.38	$ 1.57	$ 3.90	$ 3.49

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