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Share-Based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2022
Share-Based Compensation Plans |
Schedule of Company's stock option activity | The following table summarizes the Company’s stock option activity for the six-month period ended June 30, 2022: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | ​ | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Price |  | Term (Years) |  | Value*
Outstanding at December 31, 2021 |  | 1,279,833 | ​ | $ | 25.44 |  |  |  | ​ |
Granted |  | — | ​ | $ | — |  |  |  | ​ |
Exercised |  | (51,614) | ​ | $ | 24.99 |  |  |  | ​ |
Forfeited or expired |  | (11,010) | ​ | $ | 24.36 |  |  |  | ​ |
Outstanding at June 30, 2022 |  | 1,217,209 | ​ | $ | 25.47 |  | 5.2 | ​ | $ | 1,355,000
Exercisable at June 30, 2022 |  | 743,501 | ​ | $ | 26.59 |  | 3.5 | ​ | $ | 343,000
* The aggregate intrinsic value of outstanding and exercisable stock options is defined as the difference between the market value of the Company’s stock on June 30, 2022 of $24.45 and the exercise price multiplied by the number of in-the-money outstanding and exercisable stock options.
Schedule of Company's restricted stock award | The following table summarizes the Company’s restricted stock award activity for the six-month period ended June 30, 2022: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | ​ | ​
​ | ​ | Shares of | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | Restricted | ​ | Grant Date | ​ | Contractual | ​ | Intrinsic
​ |  | Stock |  | Fair Value |  | Term (Years) |  | Value*
Non-vested at December 31, 2021 |  | 78,470 | ​ | $ | 23.11 |  |  |  | ​ |
Issued |  | — | ​ | ​ | — |  |  |  | ​ |
Vested |  | (5,050) | ​ |  | 23.28 |  |  |  | ​ |
Forfeited |  | — | ​ |  | — |  |  |  | ​ |
Non-vested at June 30, 2022 |  | 73,420 | ​ | $ | 23.10 |  | 2.3 | ​ | $ | 1,795,000
* The aggregate intrinsic value of non-vested restricted stock was calculated using the market value of the Company’s stock on June 30, 2022 of $24.45 multiplied by the number of non-vested restricted shares outstanding.

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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