Earnings Per Share: Schedule of Earnings Per Share Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2013 |
Sep. 30, 2013 |
Jun. 30, 2013 |
Mar. 31, 2013 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Earnings Per Share [Abstract] | |||||||||||||||
| Net income | $ 2,117 | $ 2,446 | $ 2,368 | $ 2,229 | $ 2,940 | $ 2,735 | $ 2,367 | $ 2,645 | $ 3,934 | $ 2,612 | $ 16,363 | $ 1,556 | $ 9,160 | $ 10,687 | $ 24,465 |
| Undistributed Earnings (Loss) Allocated to Participating Securities, Basic | (31) | (52) | (150) | ||||||||||||
| Earnings allocated to common shareholders | $ 9,129 | $ 10,635 | $ 24,315 | ||||||||||||
| Basic weighted-average common shares outstanding | 13,528,393 | 14,747,086 | 16,580,882 | ||||||||||||
| Dilutive effect of stock options | 136,670 | 116,624 | 28,985 | ||||||||||||
| Dilutive effect of restricted stock grants | 20,919 | 23,488 | 0 | ||||||||||||
| Diluted weighted-average common shares outstanding | 13,685,982 | 14,887,198 | 16,609,867 | ||||||||||||
| Basic earnings (loss) per share (usd per share) | $ 0.16 | $ 0.18 | $ 0.17 | $ 0.16 | $ 0.20 | $ 0.19 | $ 0.16 | $ 0.17 | $ 0.25 | $ 0.16 | $ 0.96 | $ 0.09 | $ 0.67 | $ 0.72 | $ 1.47 |
| Diluted earnings (loss) per share (usd per share) | $ 0.16 | $ 0.18 | $ 0.17 | $ 0.16 | $ 0.20 | $ 0.19 | $ 0.16 | $ 0.17 | $ 0.25 | $ 0.16 | $ 0.95 | $ 0.09 | $ 0.67 | $ 0.71 | $ 1.46 |