Investments: Schedule of Available for sale Securities in Continuous Unrealized Loss positions (Details) - USD ($)
$ in Thousands |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Less than twelve months, Fair Value |
$ 81,535
|
$ 75,084
|
| Less than twelve months, Unrealized Loss |
(1,872)
|
(706)
|
| Twelve months or longer, Fair Value |
6,119
|
3,233
|
| Twelve months or longer, Unrealized Loss |
(309)
|
(85)
|
| Fair Value |
87,654
|
78,317
|
| Unrealized Loss |
(2,181)
|
(791)
|
| Mortgage-backed investments, Fannie Mae |
|
|
| Less than twelve months, Fair Value |
34,763
|
37,593
|
| Less than twelve months, Unrealized Loss |
(854)
|
(227)
|
| Twelve months or longer, Fair Value |
0
|
0
|
| Twelve months or longer, Unrealized Loss |
0
|
0
|
| Fair Value |
34,763
|
37,593
|
| Unrealized Loss |
(854)
|
(227)
|
| Mortgage-backed investments, Freddie Mac |
|
|
| Less than twelve months, Fair Value |
8,343
|
12,115
|
| Less than twelve months, Unrealized Loss |
(99)
|
(117)
|
| Twelve months or longer, Fair Value |
0
|
0
|
| Twelve months or longer, Unrealized Loss |
0
|
0
|
| Fair Value |
8,343
|
12,115
|
| Unrealized Loss |
(99)
|
(117)
|
| Mortgage backed investments Ginnie Mae |
|
|
| Less than twelve months, Fair Value |
16,734
|
5,508
|
| Less than twelve months, Unrealized Loss |
(540)
|
(29)
|
| Twelve months or longer, Fair Value |
0
|
3,233
|
| Twelve months or longer, Unrealized Loss |
0
|
(85)
|
| Fair Value |
16,734
|
8,741
|
| Unrealized Loss |
(540)
|
(114)
|
| Municipal Bonds |
|
|
| Less than twelve months, Fair Value |
8,815
|
0
|
| Less than twelve months, Unrealized Loss |
(107)
|
0
|
| Twelve months or longer, Fair Value |
0
|
0
|
| Twelve months or longer, Unrealized Loss |
0
|
0
|
| Fair Value |
8,815
|
0
|
| Unrealized Loss |
(107)
|
0
|
| US Government agencies |
|
|
| Less than twelve months, Fair Value |
9,000
|
9,605
|
| Less than twelve months, Unrealized Loss |
(153)
|
(88)
|
| Twelve months or longer, Fair Value |
1,426
|
0
|
| Twelve months or longer, Unrealized Loss |
(2)
|
0
|
| Fair Value |
10,426
|
9,605
|
| Unrealized Loss |
(155)
|
(88)
|
| Corporate Bonds |
|
|
| Less than twelve months, Fair Value |
3,880
|
10,263
|
| Less than twelve months, Unrealized Loss |
(119)
|
(245)
|
| Twelve months or longer, Fair Value |
4,693
|
0
|
| Twelve months or longer, Unrealized Loss |
(307)
|
0
|
| Fair Value |
8,573
|
10,263
|
| Unrealized Loss |
$ (426)
|
$ (245)
|