Investments: Available-for-sale Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 128,143	$ 137,294
Gross Unrealized Gains	2,418	1,087
Gross Unrealized Losses	(1,687)	(1,780)
Fair Value	128,874	136,601
Mortgage-backed investments, Fannie Mae
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,241	15,605
Gross Unrealized Gains	527	128
Gross Unrealized Losses	(11)	(104)
Fair Value	13,757	15,629
Mortgage-backed investments, Freddie Mac
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,151	4,196
Gross Unrealized Gains	203	96
Gross Unrealized Losses	0	0
Fair Value	4,354	4,292
Mortgage backed investments Ginnie Mae
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,588	23,239
Gross Unrealized Gains	698	140
Gross Unrealized Losses	(10)	(329)
Fair Value	21,276	23,050
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,007	11,407
Gross Unrealized Gains	128	66
Gross Unrealized Losses	(112)	(25)
Fair Value	11,023	11,448
Municipal Bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,503	10,675
Gross Unrealized Gains	684	272
Gross Unrealized Losses	(12)	(36)
Fair Value	14,175	10,911
US Government agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	43,652	46,672
Gross Unrealized Gains	64	13
Gross Unrealized Losses	(1,222)	(935)
Fair Value	42,494	45,750
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	22,001	25,500
Gross Unrealized Gains	114	372
Gross Unrealized Losses	(320)	(351)
Fair Value	$ 21,795	$ 25,521