Investments: Schedule of Available for sale Securities, Debt Maturities (Details) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Investments [Abstract] | ||
| Due within one year, Amortized Cost | $ 0 | |
| Due after one year through five years, Amortized Cost | 9,845 | |
| Due after five years through ten years, Amortized Cost | 16,349 | |
| Due after ten years, Amortized Cost | 13,144 | |
| Debt maturities, Amortized Cost | 39,338 | |
| Mortgage-backed investments, Amortized Cost | 90,101 | |
| Amortized Cost | 129,439 | $ 119,140 |
| Due within one year, Fair Value | 0 | |
| Due after one year through five years, Fair Value | 9,802 | |
| Due after five years through ten years, Fair Value | 16,222 | |
| Due after ten years, Fair Value | 13,351 | |
| Debt maturities, Fair Value | 39,375 | |
| Mortgage-backed investments, Fair Value | 90,190 | |
| Fair Value | $ 129,565 |