Investments: Schedule of Available for sale Securities in Continuous Unrealized Loss positions (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value
Less Than 12 Months	$ 40,291	$ 115,259
12 Months or Longer	166,479	92,739
Total	206,770	207,998
Gross Unrealized Loss
Less Than 12 Months	(1,366)	(6,392)
12 Months or Longer	(19,590)	(11,798)
Total	(20,957)	(18,190)
Mortgage-backed investments, Fannie Mae
Fair Value
Less Than 12 Months	2,086	6,710
12 Months or Longer	7,727	3,226
Total	9,813	9,936
Gross Unrealized Loss
Less Than 12 Months	(43)	(1,073)
12 Months or Longer	(1,821)	(787)
Total	(1,864)	(1,860)
Mortgage-backed investments, Freddie Mac
Fair Value
Less Than 12 Months	1,620	4,677
12 Months or Longer	10,112	6,476
Total	11,731	11,153
Gross Unrealized Loss
Less Than 12 Months	(93)	(272)
12 Months or Longer	(1,828)	(1,559)
Total	(1,921)	(1,831)
Mortgage backed investments Ginnie Mae
Fair Value
Less Than 12 Months	11,465	7,645
12 Months or Longer	15,529	13,714
Total	26,994	21,359
Gross Unrealized Loss
Less Than 12 Months	(50)	(310)
12 Months or Longer	(1,589)	(1,291)
Total	(1,639)	(1,601)
Mortgage-backed investments, Other
Fair Value
Less Than 12 Months	12,003	27,430
12 Months or Longer	18,344	4,959
Total	30,347	32,389
Gross Unrealized Loss
Less Than 12 Months	(838)	(1,614)
12 Months or Longer	(1,181)	(292)
Total	(2,020)	(1,906)
Municipal bonds
Fair Value
Less Than 12 Months	3,631	7,892
12 Months or Longer	25,968	20,901
Total	29,599	28,793
Gross Unrealized Loss
Less Than 12 Months	(48)	(680)
12 Months or Longer	(5,350)	(5,422)
Total	(5,398)	(6,102)
U.S. Government agencies
Fair Value
Less Than 12 Months	2,762	43,664
12 Months or Longer	68,714	30,224
Total	71,477	73,888
Gross Unrealized Loss
Less Than 12 Months	(18)	(1,184)
12 Months or Longer	(1,906)	(1,186)
Total	(1,924)	(2,370)
Corporate bonds
Fair Value
Less Than 12 Months	6,724	17,241
12 Months or Longer	20,085	13,239
Total	26,809	30,480
Gross Unrealized Loss
Less Than 12 Months	(276)	(1,259)
12 Months or Longer	(5,915)	(1,261)
Total	$ (6,191)	$ (2,520)