16. | Cash and stock-based compensation plans |
| | Shares | | | Weighted average grant date fair value | | ||
Outstanding at January 1, 2015 | | | 78,336 | | | | 24.37 | |
Granted | | | 57,000 | | | | 33.78 | |
Vested | | | (39,015) | | | | 22.69 | |
Outstanding at December 31, 2015 | | | 96,321 | | | | 30.62 | |
Granted | | | 57,000 | | | | 24.14 | |
Vested | | | (56,421) | | | | 28.80 | |
Outstanding at December 31, 2016 | | | 96,900 | | | | 27.86 | |
Granted | | | 57,000 | | | | 27.80 | |
Vested | | | (61,950) | | | | 28.50 | |
Outstanding at December 31, 2017 | | | 91,950 | | | | 27.40 | |
Expected to vest | | | 91,950 | | | | | |
| | Shares | | Weighted average grand date fair value | | Weighted average remaining contractual term | | Aggregate Intrinsic value | | ||||
Outstanding at January 1, 2015 | | | 163,712 | | | 18.18 | | | | | | | |
Granted | | | 63,244 | | | 21.67 | | | | | | | |
Forfeited | | | - | | | | | | | | | | |
Vested | | | (64,208) | | | 17.67 | | | | | | | |
Outstanding at December 31, 2015 | | | 162,748 | | | 19.74 | | | | | | | |
Granted | | | 91,454 | | | 18.26 | | | | | | | |
Forfeited | | | (21,408) | | | 17.69 | | | | | | | |
Vested | | | (65,358) | | | 18.83 | | | | | | | |
Outstanding at December 31, 2016 | | | 167,436 | | | 19.35 | | | | | | | |
Granted | | | 25,289 | | | 25.70 | | | | | | | |
Forfeited | | | (71,401) | | | 18.61 | | | | | | | |
Vested | | | (70,519) | | | 19.76 | | | | | | | |
Outstanding at December 31, 2017 | | | 50,805 | | | 21.07 | | | 2.02 years | | $ | 518 | |
Expected to vest | | | 50,805 | | | 21.07 | | | 2.02 years | | $ | 296 | |
| | Measuring unit | | 2017 | | 2016 | | 2015 | | |||
| | | | | | | | | | | | |
Weighted average fair value per option | | $ | | | - | | | - | | | 1.95 - 2.06 | |
Weighted average expected term, in years | | Year | | | - | | | - | | | 5.5 | |
Expected volatility | | % | | | - | | | - | | | 22 | % |
Risk-free rate | | % | | | - | | | - | | | 0.02 1.52 | |
Expected dividend | | % | | | - | | | - | | | 5.00 | % |
| | Options | | Weighted average exercise price | | Weighted average remaining contractual term | | Aggregate Intrinsic value | | ||||
Outstanding at January 1, 2015 | | | 391,696 | | | 23.65 | | | | | | | |
Granted | | | 233,418 | | | 29.25 | | | | | | | |
Forfeited | | | - | | | - | | | | | | | |
Exercised | | | (70,358) | | | 20.86 | | | | | | | |
Outstanding at December 31, 2015 | | | 554,756 | | | 26.36 | | | | | | | |
Granted | | | - | | | - | | | | | | | |
Forfeited | | | (126) | | | 18.93 | | | | | | | |
Exercised | | | (68,785) | | | 22.78 | | | | | | | |
Outstanding at December 31, 2016 | | | 485,845 | | | 26.87 | | | | | | | |
Granted | | | - | | | | | | | | | | |
Forfeited | | | (69,934) | | | 28.63 | | | | | | | |
Exercised | | | (142,268) | | | 24.84 | | | | | | | |
Outstanding at December 31, 2017 | | | 273,643 | | | 27.48 | | | 3.66 years | | $ | 242 | |
Exercisable | | | 121,840 | | | 27.73 | | | 3.70 years | | $ | 115 | |
Expected to vest | | | 151,803 | | | 27.28 | | | 3.63 years | | $ | 128 | |