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Stock-Based Compensation Plans (Tables) | 9 Months Ended
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Sep. 30, 2021
Summarizes Transactions of SEUs | The following table summarizes the transactions of the Company’s SEUs for the nine months ended September 30, 2021:
|  | Number of SEUs |  |  | Weighted Average Exercise Price |  |  | Weighted Average Grant-Date Fair Value |
Outstanding at December 31, 2020 |  |  | 390,164 |  |  | $ | 4.35 |  |  | $ | 63.96 |
Granted - at discount |  |  | 94,151 |  |  | $ | 0.00 |  |  | $ | 91.83 |
- at market value |  |  | 3,803 |  |  | $ | 99.85 |  |  | $ | 32.71 |
Exercised |  |  | (35,384 | ) |  | $ | 13.93 |  |  | $ | 45.20 |
Forfeited |  |  | (25,290 | ) |  | $ | 2.40 |  |  | $ | 66.53 |
Outstanding at September 30, 2021 |  |  | 427,444 |  |  | $ | 3.57 |  |  | $ | 71.22 |
Stock Options Plan [Member] |
Summary of Transactions of Company's Stock Option Plans | The following table summarizes the transactions of the Company’s stock option plans for the nine months ended September 30, 2021.
|  | Number of Options |  |  | Weighted Average Exercise Price |  |  | Weighted Average Grant-Date Fair Value |
Outstanding at December 31, 2020 |  |  | 442,893 |  |  | $ | 32.49 |  |  | $ | 45.31 |
Granted - at discount |  |  | 81,596 |  |  | $ | 0.00 |  |  | $ | 92.37 |
- at market value |  |  | 10,688 |  |  | $ | 99.85 |  |  | $ | 32.73 |
Exercised |  |  | (56,508 | ) |  | $ | 34.57 |  |  | $ | 37.45 |
Forfeited |  |  | (19,023 | ) |  | $ | 20.46 |  |  | $ | 63.56 |
Outstanding at September 30, 2021 |  |  | 459,646 |  |  | $ | 28.44 |  |  | $ | 53.64 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, 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 (e) -URI http://asc.fasb.org/extlink&oid=120381028&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 (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&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 http://asc.fasb.org/extlink&oid=120381028&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=120381028&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=120381028&loc=d3e5070-113901 + Details
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