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Share-Based Payment Arrangements | 3 Months Ended
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Mar. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Share-Based Payment Arrangements | 12. Share-Based Payment Arrangements The Company maintains incentive compensation plans that provide for awards of share-based compensation to employees and directors. These plans have been approved by the Company’s shareholders. Detailed descriptions of these plans were included in Note 18 to the consolidated financial statements in the Company’s Annual Report on Form 10-K for the year ended December 31, 2023. The Company’s restricted and performance-based share awards to certain employees and directors are subject to service requirements. A summary of the status of the Company’s nonvested restricted stock units and restricted and performance-based share awards at March 31, 2024 are presented in the following table.
|  |  |  |  | Weighted |
|  |  |  |  | Average |
|  | Number of |  |  | Grant Date |
|  | Shares |  |  | Fair Value |
Nonvested at January 1, 2024 |  |  | 1,457,401 |  |  | $ | 44.65 |
Granted |  |  | 751,122 |  |  |  | 42.07 |
Vested |  |  | (440,820 | ) |  |  | 41.51 |
Forfeited |  |  | (51,361 | ) |  |  | 43.49 |
Nonvested at March 31, 2024 |  |  | 1,716,342 |  |  | $ | 44.36 |
At March 31, 2024, there was $65.0 million of total unrecognized compensation expense related to nonvested restricted and performance share awards and units expected to vest in the future. This compensation is expected to be recognized in expense over a weighted average period of 3.4 years. The total fair value of shares that vested during the three months ended March 31, 2024 was $16.0 million. During the three months ended March 31, 2024, the Company granted 533,662 restricted stock units (RSUs) to certain eligible employees. Unlike restricted share awards (RSAs), the holders of unvested restricted stock units have no rights as a shareholder of the Company, including voting or dividend rights. The Company has elected to award dividend equivalents on each restricted stock unit not deferred under the Company's nonqualified deferred compensation plan. Such dividend equivalents are forfeited should the employee terminate employment prior to the vesting of the RSU. During the three months ended March 31, 2024, the Company granted 47,734 performance share awards subject to a total shareholder return (“TSR”) performance metric with a grant date fair value of $43.23 per share and 47,734 performance share awards subject to an adjusted earnings per share performance metric with a grant date fair value of $36.25 per share to key members of executive management. The number of performance shares subject to TSR that ultimately vest at the end of the three-year performance period, if any, will be based on the relative rank of the Company’s three-year TSR among the TSRs of a peer group of 49 regional banks. The fair value of the performance shares subject to TSR at the grant date was determined using a Monte Carlo simulation method. The number of performance shares subject to adjusted earnings per share that ultimately vest will be based on the Company’s attainment of certain adjusted earnings per share goals over the two-year performance period. The maximum number of performance shares that could vest is 200% of the target award. Compensation expense for these performance shares is recognized on a straight line basis over the three-year service period.

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