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Share-Based Compensation Plans | 3 Months Ended
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Mar. 31, 2023
Share-Based Compensation Plans |
Share-Based Compensation Plans | 10. Share-Based Compensation Plans During the three months ended March 31, 2023, we recognized $338,000 of compensation expense associated with stock option and restricted stock awards granted in years 2018 through 2022. During the three months ended March 31, 2022, we recognized $350,000 of compensation expense associated with stock option and restricted stock awards granted in years 2017 through 2021. The following table summarizes our stock option activity for the three-month period ended March 31, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term (Years) |  | Value*
Outstanding at December 31, 2022 |  | 1,345,369 | ​ | $ | 25.83 |  |  |  | ​ |
Granted |  | — | ​ | ​ | — |  |  |  | ​ |
Exercised |  | (2,100) | ​ | ​ | 18.00 |  |  |  | ​ |
Forfeited or expired |  | (1,020) | ​ | ​ | 29.65 |  |  |  | ​ |
Outstanding at March 31, 2023 |  | 1,342,249 | ​ | $ | 25.84 |  | 5.0 | ​ | $ | 1,759,000
Exercisable at March 31, 2023 |  | 889,013 | ​ | $ | 26.37 |  | 3.4 | ​ | $ | 780,000
​ *The aggregate intrinsic value of outstanding and exercisable stock options is defined as the difference between the market value of our Company’s common stock on March 31, 2023 of $25.30 and the exercise price multiplied by the number of in-the-money outstanding and exercisable stock options. The following table summarizes our restricted stock award activity for the three-month period ended March 31, 2023: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | Shares of | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Restricted | ​ | Grant Date | ​ | Contractual | ​ | Intrinsic
​ |  | Stock |  | Fair Value |  | Term (Years) |  | Value*
Non-vested at December 31, 2022 |  | 71,808 | ​ | $ | 24.67 |  |  |  | ​ |
Issued |  | — | ​ | ​ | — |  |  |  | ​ |
Vested |  | (150) | ​ |  | 28.77 |  |  |  | ​ |
Forfeited |  | - | ​ |  | — |  |  |  | ​ |
Non-vested at March 31, 2023 |  | 71,658 | ​ | $ | 24.66 |  | 2.4 | ​ | $ | 1,813,000
​ *The aggregate intrinsic value of non-vested restricted stock was calculated using the market value of our Company’s common stock on March 31, 2023 of $25.30 multiplied by the number of non-vested restricted shares outstanding.

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