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Earnings Per Share and Restricted Stock | 6 Months Ended
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Jun. 30, 2024
Earnings Per Share [Abstract] |
Earnings Per Share and Restricted Stock | Earnings Per Share and Restricted Stock The Corporation has a simple capital structure. Basic earnings per share of common stock is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding less unvested restricted stock at the end of the period. Diluted earnings per share is calculated as net income available to common shareholders divided by the weighted average number of shares outstanding.
| Three Months Ended June 30, |  | Six Months Ended June 30,
2024 |  | 2023 |  | 2024 |  | 2023
Weighted average shares outstanding (basic) | 8,502,268 |  |  | 8,512,145 |  |  | 8,497,686 |  |  | 8,517,741 |
Dilutive effect of unvested shares | 38,438 |  |  | 11,732 |  |  | 28,491 |  |  | 23,682 |
Weighted average shares outstanding (diluted) | 8,540,706 |  |  | 8,523,877 |  |  | 8,526,177 |  |  | 8,541,423 |
Per share: |  |  |  |  |  |  |
Basic | $ | 1.32 |  |  | $ | 1.12 |  |  | $ | 2.12 |  |  | $ | 2.18 |
Diluted | 1.32 |  |  | 1.12 |  |  | 2.12 |  |  | 2.17 |
There were no antidilutive instruments at June 30, 2024 and 2023. Stock Incentive Plan On May 1, 2018, shareholders approved and ratified the ACNB Corporation 2018 Omnibus Stock Incentive Plan, effective as of March 20, 2018, in which awards shall not exceed, in the aggregate, 400,000 shares of common stock, plus any shares that were authorized, but not issued, under the ACNB Corporation 2009 Restricted Stock Plan. The ACNB Corporation 2009 Restricted Stock Plan expired by its own terms after 10 years on February 24, 2019. No further shares may be issued under this plan. The remaining 174,055 shares were transferred to the ACNB Corporation 2018 Omnibus Stock Incentive Plan. As of June 30, 2024, 138,019 shares were issued under this plan, of which 38,438 were unvested. Plan expense is recognized over the vesting period of the stock issued and resulted in $241 thousand and $254 thousand of compensation expense during the three months ended June 30, 2024 and 2023, respectively. Compensation expense recognized during the six months ended June 30, 2024 and 2023 was $775 thousand and $748 thousand, respectively. Share Repurchase Plan On October 24, 2022, the Corporation announced that the Board of Directors approved on October 18, 2022, a plan to repurchase, in open market and privately negotiated transactions, up to 255,575, or approximately 3%, of the outstanding shares of the Corporation’s common stock. This new common stock repurchase program replaces and supersedes any and all earlier announced repurchase plans. There were 65,266 treasury shares purchased under this plan through June 30, 2024.

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