Federal Income Taxes: Reconciliation From Tax At the Statutory Rate to the Income Tax Provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Income Tax Disclosure [Abstract]
Income tax expense at statutory rate	$ 3,441	$ 3,187
Tax exempt interest, net	(50)	(54)
BOLI income, net	(207)	(229)
Other, net	(15)	21
Total income tax expense	$ 3,169	$ 2,925