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Common Stock, Compensation Plans and Other (Tables) | 12 Months Ended
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Dec. 31, 2023
Share-Based Payment Arrangement [Abstract] |
Summary of Stock Option Transactions under Plan | The table below summarized the stock option transactions under the Plan at December 31, 2023, 2022 and 2021 and changes during the years then ended:
| 2023 |  | 2022 |  | 2021
| Shares (000) |  | Weighted- average Exercisable Price |  | Shares (000) |  | Weighted- average Exercisable Price |  | Shares (000) |  | Weighted- average Exercisable Price
Outstanding, beginning of year | 2,971 |  |  | $ | 20.45 |  |  | 3,015 |  |  | $ | 20.06 |  |  | 3,254 |  |  | $ | 19.77 |
Granted | 25 |  |  | 22.63 |  |  | 183 |  |  | 21.13 |  |  | 15 |  |  | 21.68 |
Forfeited/Expired | (10) |  |  | 23.38 |  |  | (96) |  |  | 21.89 |  |  | (57) |  |  | 22.44 |
Exercised | (210) |  |  | 14.01 |  |  | (131) |  |  | 11.30 |  |  | (197) |  |  | 14.78 |
Outstanding, end of year | 2,776 |  |  | 20.95 |  |  | 2,971 |  |  | 20.45 |  |  | 3,015 |  |  | 20.06 |
Exercisable, end of year | 1,940 |  |  | 20.05 |  |  | 1,837 |  |  | 18.89 |  |  | 1,543 |  |  | 17.46 |
Summary of Stock Options on Valuation Assumptions | The assumptions used in determining the fair value of 2023, 2022 and 2021 stock option grants were as follows:
| For the Years Ended December 31,
| 2023 |  | 2022 | 2021
Expected dividend yield | 2.98 | % |  | 3.14 | % |  | 2.59 | %
Expected stock price volatility | 27.97 | % |  | 31.18 | % |  | 70.13 | %
Risk-free interest rate | 3.37 | % |  | 2.82 | % |  | 0.75 | %
Expected life of options | 6.5 years |  | 6.5 years |  | 6.5 years
Summary of Currently Outstanding and Exercisable Options | The following is a summary of currently outstanding and exercisable options at December 31, 2023:
Options Outstanding |  | Options Exercisable
Exercise Prices |  | Options Outstanding Shares (000) |  | Weighted- Average Remaining Contractual Life (in years) |  | Weighted- Average Exercise Price |  | Options Exercisable Shares (000) |  | Weighted- Average Exercise Price
$14.00 to $15.99 |  | 100 |  |  | 1.04 |  | $ | 14.71 |  |  | 100 |  |  | $ | 14.71 |
$16.00 to $17.99 |  | 172 |  |  | 0.91 |  | 16.92 |  |  | 172 |  |  | 16.92 |
$18.00 to $19.99 |  | 836 |  |  | 1.79 |  | 18.48 |  |  | 829 |  |  | 18.48 |
$20.00 to $21.99 |  | 268 |  |  | 4.72 |  | 20.87 |  |  | 191 |  |  | 20.98 |
$22.00 to $23.99 |  | 1,309 |  |  | 4.65 |  | 23.22 |  |  | 577 |  |  | 23.14 |
$24.00 to $25.99 |  | 91 |  |  | 4.40 |  | 25.59 |  |  | 71 |  |  | 25.95 |
|  | 2,776 |  |  |  |  |  |  | 1,940 |  |  |
Summary of Company's Restricted Stock Issued and Outstanding | The table below summarizes the activity for the Company’s restricted stock issued and outstanding at December 31, 2023, 2022 and 2021 and changes during the years then ended:
| 2023 |  | 2022 |  | 2021
| (In thousands)
Beginning of year | 1,381 |  |  | 1,231 |  |  | 1,371 |
Issued | 261 |  |  | 409 |  |  | 216 |
Vested | (152) |  |  | (178) |  |  | (320) |
Forfeited | (61) |  |  | (81) |  |  | (36) |
End of year | 1,429 |  |  | 1,381 |  |  | 1,231 |
Amount of expense for twelve months ended | $ | 8,016 |  |  | $ | 7,646 |  |  | $ | 7,112 |

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