Federal Income Taxes: Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets:
ALLL	$ 2,775	$ 2,801
Reserve for unfunded commitments	90	96
Deferred compensation	272	293
Net unrealized loss on investments available-for-sale	146	640
Employee benefit plans	487	527
OREO market value adjustments	10	4
Accrued expenses	93	111
Core deposit intangible	30	18
Expenses to facilitate branch acquisition	24	26
Deferred Tax Assets, Split Dollar Life Insurance	67	51
Deferred Tax Assets, Deferred Rent	0	18
Deferred Tax Assets, Lease Liability	479	0
Total deferred tax assets	4,473	4,585
Deferred tax liabilities:
FHLB stock dividends	16	110
Loan origination fees and costs	940	903
Gain on fair value of cash flow hedge	89	349
Fixed assets	1,387	1,271
Goodwill	29	17
Deferred Tax Liability, Right Of Use Asset	464	0
Goodwill	47	91
Total deferred tax liabilities	2,972	2,741
Deferred tax assets, net	$ 1,501	$ 1,844