Loans, Leases and Allowance: Impaired Financing Receivables (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Recorded Balance
Loans without a specific valuation allowance, recorded balance	$ 483	$ 614
Loans with a specific valuation allowance, recorded balance	5,505	5,528
Total impaired loans, recorded balance	5,988	6,142
Unpaid Principal Balance
Loans without a specific valuation allowance, unpaid principal balance	808	1,009
Loans with a specific valuation allowance, unpaid principal balance	5,547	5,558
Total impaired loans, unpaid principal balance	6,355	6,567
Loans with a specific valuation allowance	1,047	1,049
Commercial mortgage
Recorded Balance
Loans without a specific valuation allowance, recorded balance		128
Total impaired loans, recorded balance		128
Unpaid Principal Balance
Loans without a specific valuation allowance, unpaid principal balance		199
Total impaired loans, unpaid principal balance		199
Loans with a specific valuation allowance		0
Commercial and industrial
Recorded Balance
Loans without a specific valuation allowance, recorded balance	367	367
Loans with a specific valuation allowance, recorded balance	605	628
Total impaired loans, recorded balance	972	995
Unpaid Principal Balance
Loans without a specific valuation allowance, unpaid principal balance	566	566
Loans with a specific valuation allowance, unpaid principal balance	647	658
Total impaired loans, unpaid principal balance	1,213	1,224
Loans with a specific valuation allowance	297	299
Construction and development
Recorded Balance
Loans with a specific valuation allowance, recorded balance	4,900	4,900
Total impaired loans, recorded balance	4,900	4,900
Unpaid Principal Balance
Loans with a specific valuation allowance, unpaid principal balance	4,900	4,900
Total impaired loans, unpaid principal balance	4,900	4,900
Loans with a specific valuation allowance	750	750
Residential mortgage
Recorded Balance
Loans without a specific valuation allowance, recorded balance	116	119
Total impaired loans, recorded balance	116	119
Unpaid Principal Balance
Loans without a specific valuation allowance, unpaid principal balance	242	244
Total impaired loans, unpaid principal balance	242	244
Loans with a specific valuation allowance	$ 0	$ 0