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Stock-Based Compensation Plans (Tables) | 6 Months Ended
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Jun. 30, 2021
Summarizes Transactions of SEUs | The following table summarizes the transactions of the Company’s SEUs for the six months ended June 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 |  |  | 91,451 |  |  | $ | 0.00 |  |  | $ | 92.01 |
- at market value |  |  | 3,803 |  |  | $ | 99.85 |  |  | $ | 32.71 |
Exercised |  |  | (29,573 | ) |  | $ | 16.67 |  |  | $ | 43.05 |
Forfeited |  |  | (21,940 | ) |  | $ | 2.76 |  |  | $ | 67.01 |
Outstanding at June 30, 2021 |  |  | 433,905 |  |  | $ | 3.51 |  |  | $ | 70.87 |
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 six months ended June 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 |  |  | (52,870 | ) |  | $ | 32.93 |  |  | $ | 38.15 |
Forfeited |  |  | (17,806 | ) |  | $ | 17.98 |  |  | $ | 65.96 |
Outstanding at June 30, 2021 |  |  | 464,501 |  |  | $ | 28.75 |  |  | $ | 53.57 |

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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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