Stock Based Compensation - Restricted Stock Activity (Details) - Restricted Stock [Member] |
9 Months Ended |
|---|---|
|
Sep. 30, 2016
$ / shares
shares
| |
| Shares [Roll Forward] | |
| Nonvested at December 31, 2015 (in shares) | shares | 41,563 |
| Granted (in shares) | shares | 25,943 |
| Vested (in shares) | shares | (19,219) |
| Forfeited (in shares) | shares | (547) |
| Nonvested at September 30, 2016 (in shares) | shares | 47,740 |
| Weighted Average Grant Date Fair Value [Roll Forward] | |
| Nonvested at December 31, 2015 (in dollars per share) | $ / shares | $ 22.15 |
| Granted (in dollars per share) | $ / shares | 23.07 |
| Vested (in dollars per share) | $ / shares | 21.47 |
| Forfeited (in dollars per share) | $ / shares | 21.98 |
| Nonvested at September 30, 2015 (in dollars per share) | $ / shares | $ 22.93 |