Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Details
Net income	$ 4,280	$ 4,206	$ 11,918	$ 10,656
Weighted average shares, basic	3,625	3,647	3,641	3,645
Dilutive effect of stock options	9	11	9	11
Diluted shares	3,634	3,658	3,650	3,656
Earnings per share, basic	$ 1.18	$ 1.15	$ 3.27	$ 2.92
Earnings per share, diluted	$ 1.18	$ 1.15	$ 3.26	$ 2.91