Summary of Stock Option Activity |
No stock options were outstanding during the years ended December 31, 2017 and 2016. Certain information for the year ended December 31, 2015 relative to employee stock options is summarized as follows: | | | | | | | 2015 | Number of shares under the plans: | | | Outstanding and exercisable at beginning of year | | 7,500 |
| Granted | | — |
| Canceled | | — |
| Exercised | | (7,500 | ) | Outstanding and exercisable at end of year | | — |
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Schedule of Nonvested Share Activity |
The following table summarizes the restricted stock award, deferred stock, and performance unit award activity for the three-year periods ended December 31, 2017, 2016, and 2015: | | | | | | | | | | | | | | | | | Restricted Stock | | Deferred Stock | | Performance Stock Units | | Weighted Average Aggregate Grant Date Fair Value | Outstanding at January 1, 2015 | | 108,237 |
| | — |
| | 71,990 |
| | $ | 36.25 |
| Granted | | 29,656 |
| | — |
| | 41,114 |
| | 44.93 |
| Vested | | (39,076 | ) | | — |
| | (23,877 | ) | | 32.35 |
| Adjustment for incentive awards expected to vest | | — |
| | — |
| | (53,228 | ) | | 43.26 |
| Canceled and forfeited | | (5,000 | ) | | — |
| | — |
| | 44.84 |
| Outstanding at December 31, 2015 | | 93,817 |
| | — |
| | 35,999 |
| | $ | 39.66 |
| Granted | | 48,283 |
| | — |
| | 129,844 |
| | 12.50 |
| Vested | | (56,807 | ) | | — |
| | — |
| | 28.45 |
| Adjustment for incentive awards not expected to vest | | — |
| | — |
| | (93,103 | ) | | 24.79 |
| Canceled and forfeited | | (6,021 | ) | | — |
| | (9,050 | ) | | 18.82 |
| Outstanding at December 31, 2016 | | 79,272 |
| | — |
| | 63,690 |
| | $ | 21.66 |
| Granted | | 175,196 |
| | 26,860 |
| | 120,583 |
| | 14.46 |
| Vested | | (22,808 | ) | | — |
| | — |
| | 28.88 |
| Adjustment for incentive awards not expected to vest | | — |
| | — |
| | 46,130 |
| | 19.00 |
| Canceled and forfeited | | (44,854 | ) | | — |
| | (49,062 | ) | | 15.40 |
| Outstanding at December 31, 2017 | | 186,806 |
| | 26,860 |
| | 181,341 |
| | $ | 16.53 |
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