Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Details
Net income	$ 4,103	$ 3,534	$ 3,426	$ 3,024	$ 7,638	$ 6,450
Weighted average shares, basic	3,643		3,646		3,649	3,645
Dilutive effect of stock options	7		9		9	11
Diluted shares	3,650		3,655		3,658	3,656
Earnings per share, basic	$ 1.13		$ 0.94		$ 2.09	$ 1.77
Earnings per share, diluted	$ 1.12		$ 0.94		$ 2.09	$ 1.76