Fair Value: Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments available-for-sale	$ 214,948	$ 217,778
Investments held-to-maturity	2,439	2,444
FHLB stock	8,203	7,512
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	9,618	7,722
Interest-earning deposits with banks	70,998	16,598
Investments available-for-sale	39,502	39,186
Investments held-to-maturity	0	0
Loans receivable, net	0	0
FHLB stock	0	0
Accrued interest receivable	0	0
Derivative fair value asset	0	0
Deposits	702,780	782,600
Certificates of deposit, retail	0	0
Brokered deposits	0	0
Advances from the FHLB	0	0
Accrued interest payable	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	0	0
Interest-earning deposits with banks	0	0
Investments available-for-sale	175,447	178,592
Investments held-to-maturity	2,439	2,444
Loans receivable, net	0	0
FHLB stock	8,203	7,512
Accrued interest receivable	7,011	6,513
Derivative fair value asset	8,936	10,485
Deposits	0	0
Certificates of deposit, retail	326,306	254,004
Brokered deposits	191,241	124,843
Advances from the FHLB	159,998	144,999
Accrued interest payable	749	328
Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	0	0
Interest-earning deposits with banks	0	0
Investments available-for-sale	0	0
Investments held-to-maturity	0	0
Loans receivable, net	1,132,310	1,120,403
FHLB stock	0	0
Accrued interest receivable	0	0
Derivative fair value asset	0	0
Deposits	0	0
Certificates of deposit, retail	0	0
Brokered deposits	0	0
Advances from the FHLB	0	0
Accrued interest payable	0	0
Carrying Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	9,618	7,722
Interest-earning deposits with banks	70,998	16,598
Investments available-for-sale	214,949	217,778
Investments held-to-maturity	2,439	2,444
Loans receivable, net	1,184,750	1,167,083
FHLB stock	8,203	7,512
Accrued interest receivable	7,011	6,513
Derivative fair value asset	8,936	10,485
Deposits	702,780	782,600
Certificates of deposit, retail	332,934	262,554
Brokered deposits	191,414	124,886
Advances from the FHLB	160,000	145,000
Accrued interest payable	749	328
Estimated Fair Value
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash on hand and in banks	9,618	7,722
Interest-earning deposits with banks	70,998	16,598
Investments available-for-sale	214,949	217,778
Investments held-to-maturity	2,439	2,444
Loans receivable, net	1,132,310	1,120,403
FHLB stock	8,203	7,512
Accrued interest receivable	7,011	6,513
Derivative fair value asset	8,936	10,485
Deposits	702,780	782,600
Certificates of deposit, retail	326,306	254,004
Brokered deposits	191,241	124,843
Advances from the FHLB	159,998	144,999
Accrued interest payable	$ 749	$ 328