Investments: Narrative (Details) - USD ($) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Investments [Abstract] | ||
| Investments pledged as collateral for public deposits | $ 17,400,000 | $ 16,300,000 |
| Unrealized loss | 791,000 | 387,000 |
| Fair Value | $ 78,317,000 | $ 31,202,000 |