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, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Details
Net income	$ 3,426	$ 3,024	$ 1,313	$ 3,140	$ 6,450	$ 4,452
Weighted average shares, basic	3,646		3,643		3,645	3,675
Dilutive effect of stock options	9		16		11	15
Diluted shares	3,655		3,659		3,656	3,690
Earnings per share, basic	$ 0.94		$ 0.36		$ 1.77	$ 1.21
Earnings per share, diluted	$ 0.94		$ 0.36		$ 1.76	$ 1.21