Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Details
Net income	$ 3,024	$ 3,140
Weighted average shares, basic	3,644	3,707
Dilutive effect of stock options	11	17
Diluted shares	3,655	3,724
Earnings per share, basic	$ 0.83	$ 0.85
Earnings per share, diluted	$ 0.83	$ 0.84