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, 2020	Mar. 31, 2019
Details
Net income	$ 3,140	$ 3,139
Weighted average shares, basic	3,707	3,722
Dilutive effect of stock options	17	16
Diluted shares	3,724	3,738
Earnings per share, basic	$ 0.85	$ 0.84
Earnings per share, diluted	$ 0.84	$ 0.84