Income Per Share - Anti-dilutive common stock equivalents (Details) - shares |
3 Months Ended | |
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Mar. 31, 2021 |
Mar. 31, 2020 |
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| Anti-dilutive common stock equivalents | ||
| Total anti-dilutive common stock equivalents | 20,109 | 45,679 |
| Restricted Stock Awards | Service-based conditions | ||
| Anti-dilutive common stock equivalents | ||
| Total anti-dilutive common stock equivalents | 2,831 | 5,271 |
| Restricted Stock Awards | Market-based conditions | ||
| Anti-dilutive common stock equivalents | ||
| Total anti-dilutive common stock equivalents | 5,512 | 8,341 |
| Stock Options | ||
| Anti-dilutive common stock equivalents | ||
| Total anti-dilutive common stock equivalents | 11,766 | 32,067 |
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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