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Retirement and Share-based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Share-based Compensation Expense By Plan | The following table summarizes compensation expense recognized for employees and directors as a result of share-based compensation:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
| (Dollars in thousands)
ESOP | $ | 2,908 |  |  | $ | 2,547 |  |  | $ | 2,194 |
Employee Incentive Plans | 7,855 |  |  | 6,559 |  |  | 5,434 |
Director Equity Plans | 1,056 |  |  | 922 |  |  | 966 |
| $ | 11,819 |  |  | $ | 10,028 |  |  | $ | 8,594 |
Changes in Stock Options Outstanding | Changes in the number of stock options granted to employees and agents outstanding during the years ended December 31, 2020, 2019 and 2018 are as follows:
| Number of Shares |  | Weighted-Average Exercise Price per Share |  | Total Exercise Price
| (Dollars in thousands, except per share data)
Outstanding at January 1, 2018 | 1,980,265 |  |  | $ | 16.20 |  |  | $ | 32,084 |
Granted | — |  |  | — |  |  | — |
Canceled | (40,850) |  |  | 18.87 |  |  | (771) |
Exercised | (717,550) |  |  | 13.99 |  |  | (10,040) |
Outstanding at December 31, 2018 | 1,221,865 |  |  | 17.41 |  |  | 21,273 |
Granted | — |  |  | — |  |  | — |
Canceled | (22,600) |  |  | 18.14 |  |  | (410) |
Exercised | (370,352) |  |  | 11.76 |  |  | (4,357) |
Outstanding at December 31, 2019 | 828,913 |  |  | 19.91 |  |  | 16,506 |
Granted | 815,767 |  |  | 26.70 |  |  | 21,778 |
Canceled | (31,200) |  |  | 21.50 |  |  | (670) |
Exercised | (355,563) |  |  | 16.98 |  |  | (6,038) |
Outstanding at December 31, 2020 | 1,257,917 |  |  | 25.10 |  |  | $ | 31,576 |
Schedule of Stock Options Outstanding, By Exercise Price Range | The following table summarizes information about stock options outstanding at December 31, 2020:
| Stock Options Outstanding |  | Stock Options Vested
Range of Exercise Prices | Number of Awards |  | Remaining Life (yrs) |  | Weighted-Average Exercise Price Per Share |  | Number of Awards |  | Remaining Life (yrs) |  | Weighted-Average Exercise Price Per Share
$10.52 - $12.26 | 87,000 |  |  | 0.92 |  | $ | 11.42 |  |  | 87,000 |  |  | 0.92 |  | $ | 11.42 |
$21.89 - $26.70 | 460,959 |  |  | 2.17 |  | 24.68 |  |  | 355,150 |  |  | 0.04 |  | 24.79 |
$27.05 | 709,958 |  |  | 9.88 |  | 27.05 |  |  | — |  |  | 0.00 |  | — |
$10.52 - $27.05 | 1,257,917 |  |  | 6.44 |  | 25.10 |  |  | 442,150 |  |  | 0.21 |  | 22.16 |

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