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Stock-Based Compensation | 9 Months Ended
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Sep. 30, 2025
Retirement Benefits [Abstract] |
Stock-Based Compensation | Stock-Based Compensation The fair values of stock options and restricted stock awards are amortized as compensation expense on a straight-line basis over the vesting period of the grants. For colleagues who meet the definition of retirement eligible under the 2020 and 2025 Incentive Compensation Plans, expenses related to stock options and restricted stock awards are fully recognized on the date the colleague meets the definition of normal or early retirement. Compensation expense recognized is included in personnel expense on the consolidated statements of income. A summary of the Corporation’s stock option activity for the nine months ended September 30, 2025 is presented below:
Stock Options | Shares(a) | Weighted Average Exercise Price | Weighted Average Remaining Contractual Term | Aggregate Intrinsic Value(a)
Outstanding at December 31, 2024 | 1,778 |  | $ | 22.36 |  | 3.41 years | $ | 3,693 |
Exercised | 170 |  | 20.06 |  |  |
Forfeited or expired | — |  | — |  |  |
Outstanding at September 30, 2025 | 1,607 |  | $ | 22.61 |  | 2.74 years | $ | 5,033 |
Options Exercisable at September 30, 2025 | 1,607 |  | $ | 22.61 |  | 2.74 years | $ | 5,033 |
(a) In thousands Intrinsic value represents the amount by which the fair market value of the underlying stock exceeds the exercise price of the stock option. For the nine months ended September 30, 2025, the intrinsic value of stock options exercised was $1.0 million, compared to $2.8 million for the nine months ended September 30, 2024. All stock options were vested as of December 31, 2024. The total fair value of stock options vested was $0.5 million for the nine months ended September 30, 2024. The Corporation has issued time-based and performance-based restricted stock awards under the 2020 and 2025 Incentive Compensation Plans. Performance awards are based on performance goals determined by the Compensation and Benefits Committee of the Corporation's Board of Directors, with vesting ranging from a minimum of 0% to a maximum of 150% of the target award. Performance awards are valued utilizing a Monte Carlo simulation model to estimate fair value of the awards at the grant date. The following table summarizes information about the Corporation’s restricted stock awards activity for the nine months ended September 30, 2025:
Restricted Stock | Shares(a) | Weighted Average Grant Date Fair Value
Outstanding at December 31, 2024 | 2,310 |  | $ | 21.25 |
Granted | 877 |  | 24.30 |
Vested | 721 |  | 22.18 |
Forfeited | 36 |  | 22.98 |
Outstanding at September 30, 2025 | 2,429 |  | $ | 22.05 |
(a) In thousands The Corporation amortizes the expense related to restricted stock awards as compensation expense over the vesting period specified in the grant's award agreement. Performance-based restricted stock awards granted during 2024 and 2025 will cliff-vest after the three year performance period has ended. Service-based restricted stock awards granted during 2024 and 2025 will generally vest ratably over a period of four years. Expense for restricted stock awards of $15.0 million and $15.8 million was recorded for the nine months ended September 30, 2025 and September 30, 2024, respectively. Included in compensation expense for the accelerated vesting of restricted stock awards granted to retirement eligible colleagues was $4.5 million and $3.6 million of expense the first nine months of 2025 and 2024, respectively. The Corporation had $21.8 million of unrecognized compensation costs related to restricted stock awards at September 30, 2025 that are expected to be recognized over the remaining requisite service periods that extend through the first quarter of 2029. The Corporation has the ability to issue shares from treasury or new shares upon the exercise of stock options or the granting of restricted stock awards. The Board of Directors has authorized management to repurchase shares of the Corporation’s common stock, to be made available for issuance in connection with the Corporation’s employee incentive plans and for other corporate purposes. The repurchase of shares, if any, will be based on market and investment opportunities, capital levels, growth prospects, and regulatory constraints. Such repurchases may occur from time to time in open market purchases, block transactions, private transactions, accelerated share repurchase programs, or similar facilities.

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