Earnings Per Share: Schedule of Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Earnings Per Share [Abstract]
Net income	$ 10,369	$ 14,899
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(16)	(28)
Earnings allocated to common shareholders	$ 10,353	$ 14,871
Basic weighted-average common shares outstanding	9,976,056	10,306,835
Dilutive effect of stock options	93,446	108,503
Dilutive effect of restricted stock grants	6,404	8,849
Diluted weighted-average common shares outstanding	10,075,906	10,424,187
Basic earnings (loss) per share (usd per share)	$ 1.04	$ 1.44
Diluted earnings (loss) per share (usd per share)	$ 1.03	$ 1.43