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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2021
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option Activity | A summary of activity in connection with our stock options for the six months ended June 30, 2021, is as follows (number of shares in thousands):
|  | Number of Shares |  | Weighted Average Exercise Price per Share |  | Weighted Average Remaining Contractual Life in Years
Options outstanding as of December 31, 2020 |  | 1,168 |  |  | $ | 11.77 |  |  | 5.0
Options granted |  | — |  |  | — |  |  |
Options exercised |  | (120) |  |  | 5.37 |  |  |
Options cancelled/forfeited |  | — |  |  | — |  |  |
Options outstanding as of June 30, 2021 |  | 1,048 |  |  | $ | 12.50 |  |  | 3.2
Schedule of Restricted Stock Units Activity | A summary of activity in connection with our RSUs for the six months ended June 30, 2021, is as follows (number of shares in thousands):
|  | Number of Shares |  | Weighted Average Grant Date Fair Value per Share
Unvested as of December 31, 2020 |  | 483 |  |  | $ | 80.20 |
Granted |  | 194 |  |  | 140.30 |
Vested |  | (158) |  |  | 60.18 |
Forfeited |  | (21) |  |  | 105.98 |
Unvested as of June 30, 2021 |  | 498 |  |  | $ | 108.77 |
Schedule of Restricted Stock Awards Activity | A summary of activity in connection with our restricted stock awards for the six months ended June 30, 2021 is as follows (number of shares in thousands):
|  | Number of Shares |  | Weighted Average Grant Date Fair Value per Share
Unvested as of December 31, 2020 |  | 5 |  |  | $ | 153.41 |
Granted |  | 4 |  |  | 144.33 |
Vested |  | (3) |  |  | 160.34 |
Forfeited |  | — |  |  | — |
Unvested as of June 30, 2021 |  | 6 |  |  | $ | 143.74 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock shares. + 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) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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 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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