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Restricted Stock, Performance Share and Cash Awards (Tables) | 12 Months Ended
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Dec. 31, 2018
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Schedule of Restricted Stock Awards Vesting Periods | The vesting periods of the 2018, 2017 and 2016 restricted stock unit awards are as follows (in actual shares):
|  | Restricted Stock Units Granted |
Vesting Period |  | 2018 |  |  | 2017 |  |  | 2016 |
One year |  |  | 18,900 |  |  |  | 21,600 |  |  |  | 27,417 |
Two years |  |  | 12,700 |  |  |  | 12,750 |  |  |  | — |
Five years |  |  | 407,500 |  |  |  | 442,000 |  |  |  | 451,750 |
Total shares granted |  |  | 439,100 |  |  |  | 476,350 |  |  |  | 479,167 |

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