Investments: Available-for-sale Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Total	$ 226,849	$ 235,927
Gross Unrealized Gains	7	41
Gross Unrealized Losses	(21,881)	(18,190)
Fair Value	204,975	217,778
Mortgage-backed investments, Fannie Mae
Debt Securities, Available-for-sale [Line Items]
Total	11,616	11,800
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,185)	(1,860)
Fair Value	9,431	9,940
Mortgage-backed investments, Freddie Mac
Debt Securities, Available-for-sale [Line Items]
Total	13,618	13,720
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,216)	(1,831)
Fair Value	11,402	11,889
Mortgage backed investments Ginnie Mae
Debt Securities, Available-for-sale [Line Items]
Total	28,299	29,426
Gross Unrealized Gains	0	18
Gross Unrealized Losses	(1,793)	(1,601)
Fair Value	26,506	27,843
Mortgage-backed investments, Other
Debt Securities, Available-for-sale [Line Items]
Total	31,454	34,295
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,169)	(1,906)
Fair Value	29,285	32,389
Municipal bonds
Debt Securities, Available-for-sale [Line Items]
Total	36,671	36,968
Gross Unrealized Gains	0	17
Gross Unrealized Losses	(7,341)	(6,102)
Fair Value	29,330	30,883
U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Total	72,191	76,718
Gross Unrealized Gains	7	6
Gross Unrealized Losses	(1,491)	(2,370)
Fair Value	70,707	74,354
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Total	33,000	33,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(4,686)	(2,520)
Fair Value	$ 28,314	$ 30,480