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Note 1: Nature of Operations and Summary of Significant Accounting Policies: Earnings Per Share, Policy: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Details
Net income and net income available to common shareholders	$ 73,612	$ 67,109	$ 51,564
Weighted Average Number of Shares Outstanding, Basic	14,201	14,132	14,032
Average common share stock options outstanding	129	128	148
Weighted Average Number of Shares Outstanding, Diluted	14,330	14,260	14,180
Basic	$ 5.18	$ 4.75	$ 3.67
Diluted	$ 5.14	$ 4.71	$ 3.64

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