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Net Income (Loss) Per Share (Tables) | 6 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Antidilutive Securities Excluded from Computation of Earnings Per Share | The following table presents the maximum number of shares and conversion price per share of Class C capital stock for each of the Notes based on the aggregate principal amount outstanding as of June 30, 2021 (in thousands, except per share amounts):
Maturity Date |  | Shares |  | Conversion Price per Share
September 1, 2026 |  | 11,464 |  |  | $ | 43.51 |
May 15, 2025 |  | 8,408 |  |  | 67.20 |
September 1, 2024 |  | 13,983 |  |  | 43.51 |
July 1, 2023 |  | 4,692 |  |  | 78.37 |
For the periods presented, the following table reconciles the denominators used in the basic and diluted net income (loss) per share calculations (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Denominator for basic calculation | 248,152 |  |  | 219,467 |  |  | 245,763 |  |  | 215,070 |
Effect of dilutive securities: |  |  |  |  |  |  |
Option awards | 10,472 |  |  | — |  |  | 11,450 |  |  | — |
Unvested restricted stock units | 2,872 |  |  | — |  |  | 3,271 |  |  | — |
Denominator for dilutive calculation | 261,496 |  |  | 219,467 |  |  | 260,484 |  |  | 215,070 |
For the periods presented, the following Class A common stock and Class C capital stock equivalents were excluded from the calculations of diluted net income (loss) per share because their effect would have been antidilutive (in thousands):
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
Weighted-average Class A common stock and Class C capital stock option awards outstanding | 245 |  |  | 25,202 |  |  | 1,389 |  |  | 22,649 |
Weighted-average Class C capital stock restricted stock units outstanding | 984 |  |  | 9,086 |  |  | 645 |  |  | 8,354 |
Class A common stock issuable upon conversion of the convertible notes maturing in 2020 | — |  |  | 400 |  |  | — |  |  | 400 |
Class C capital stock issuable upon conversion of the 2021 Notes, 2023 Notes, 2024 Notes, 2025 Notes and 2026 Notes | 38,641 |  |  | 7,232 |  |  | 38,796 |  |  | 7,316 |
Total Class A common stock and Class C capital stock equivalents | 39,870 |  |  | 41,920 |  |  | 40,830 |  |  | 38,719 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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