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Stock-Based Compensation Plan (Tables) | 3 Months Ended
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Mar. 31, 2021
Stock-Based Compensation Plan |
Schedule of option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ | ​ |  | Weighted- |  | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | Average | ​ | ​ | ​
​ | ​ | Number | ​ | Average | ​ | Remaining | ​ | Aggregate
​ | ​ | of | ​ | Exercise | ​ | Contractual | ​ | Intrinsic
Options |  | Shares |  | Price |  | Term |  | Value (1)
Outstanding at January 1, 2021 |  | 1,727,945 | ​ | $ | 8.14 |  | 3.17 |  | ​ | ​
Granted |  | — | ​ |  | — |  | ​ |  | ​ | ​
Exercised |  | (128,608) | ​ |  | 6.40 |  | ​ |  | ​ | ​
Forfeited or expired |  | (760) | ​ |  | 10.76 |  | ​ |  | ​ | ​
Outstanding and Exercisable at March 31, 2021 |  | 1,598,577 | ​ | $ | 8.28 |  | 3.16 | ​ | $ | 13,125,999
(1) The aggregate intrinsic value of stock options represents the total pre-tax intrinsic value (the amount by which the current market value of the underlying stock exceeds the exercise price of the option) that would have been received by the option holders had all option holders exercised their options on March 31, 2021. This amount changes based on changes in the market value of the Company’s common stock.
Schedule of restricted stock grant activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted Average
​ | ​ | Number of | ​ | Grant Date
​ |  | Shares |  | Fair Value
Nonvested at January 1, 2021 |  | 72,743 | ​ | $ | 18.82
Granted |  | 116,488 | ​ |  | 17.49
Vested |  | (250) | ​ |  | 17.25
Forfeited |  | (115) | ​ |  | 19.07
Balance at March 31, 2021 |  | 188,866 | ​ | $ | 18.00

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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 http://asc.fasb.org/extlink&oid=116856206&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 http://asc.fasb.org/extlink&oid=116856206&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 http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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