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Retirement and Share-based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2023
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,
| 2023 |  | 2022 |  | 2021
| (Dollars in thousands)
ESOP | $ | 5,438 |  |  | $ | 4,152 |  |  | $ | 3,377 |
Employee Incentive Plans | 39,234 |  |  | 14,454 |  |  | 22,886 |
Director Equity Plans | 1,231 |  |  | 1,053 |  |  | 1,262 |
| $ | 45,903 |  |  | $ | 19,659 |  |  | $ | 27,525 |
Changes in Stock Options Outstanding | Changes in the number of stock options granted to employees outstanding during the years ended December 31, 2023, 2022 and 2021 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, 2021 | 1,257,917 |  |  | $ | 25.10 |  |  | $ | 31,576 |
Granted | 1,246,605 |  |  | 29.15 |  |  | 36,336 |
Canceled | (146,803) |  |  | 25.44 |  |  | (3,735) |
Exercised | (295,000) |  |  | 22.88 |  |  | (6,749) |
Outstanding at December 31, 2021 | 2,062,719 |  |  | 27.84 |  |  | 57,428 |
Granted | — |  |  | — |  |  | — |
Canceled | (102,143) |  |  | 27.49 |  |  | (2,808) |
Exercised | (173,782) |  |  | 24.59 |  |  | (4,273) |
Outstanding at December 31, 2022 | 1,786,794 |  |  | 28.18 |  |  | 50,347 |
Granted | — |  |  | — |  |  | — |
Canceled | (4,864) |  |  | 28.37 |  |  | (138) |
Exercised | (1,090,419) |  |  | 28.42 |  |  | (30,990) |
Outstanding at December 31, 2023 | 691,511 |  |  | 27.79 |  |  | $ | 19,219 |
Schedule of Stock Options Outstanding, By Exercise Price Range | The following table summarizes information about stock options outstanding at December 31, 2023:
| 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
$21.89 - $26.72 | 234,148 |  |  | 6.79 |  | $ | 26.41 |  |  | 184,148 |  |  | 6.99 |  | $ | 26.34 |
$27.05 - $32.35 | 457,363 |  |  | 7.14 |  | 28.50 |  |  | 355,736 |  |  | 7.12 |  | 28.61 |
$21.89 - $32.35 | 691,511 |  |  | 7.02 |  | 27.79 |  |  | 539,884 |  |  | 7.07 |  | 27.83 |

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