Investments: Available-for-sale Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Total	$ 233,161	$ 235,927
Gross Unrealized Gains	92	41
Gross Unrealized Losses	(18,305)	(18,190)
Fair Value	214,948	217,778
Mortgage-backed investments, Fannie Mae
Debt Securities, Available-for-sale [Line Items]
Total	11,739	11,800
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,708)	(1,860)
Fair Value	10,031	9,940
Mortgage-backed investments, Freddie Mac
Debt Securities, Available-for-sale [Line Items]
Total	13,684	13,720
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,685)	(1,831)
Fair Value	11,999	11,889
Mortgage backed investments Ginnie Mae
Debt Securities, Available-for-sale [Line Items]
Total	29,191	29,426
Gross Unrealized Gains	31	18
Gross Unrealized Losses	(1,469)	(1,601)
Fair Value	27,753	27,843
Mortgage-backed investments, Other
Debt Securities, Available-for-sale [Line Items]
Total	33,548	34,295
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,842)	(1,906)
Fair Value	31,706	32,389
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total	36,868	36,968
Gross Unrealized Gains	55	17
Gross Unrealized Losses	(5,050)	(6,102)
Fair Value	31,873	30,883
U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Total	75,131	76,718
Gross Unrealized Gains	6	6
Gross Unrealized Losses	(1,990)	(2,370)
Fair Value	73,147	74,354
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total	33,000	33,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,561)	(2,520)
Fair Value	$ 28,439	$ 30,480