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Earnings Per Share Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block] | The following table sets forth the number of employee stock-based compensation awards outstanding but not included in the computation of diluted earnings per share because their effect would have been antidilutive for the years ended December 31, 2019, 2018, and 2017 (in thousands):
| Year Ended December 31,
| 2019 |  | 2018 |  | 2017
Antidilutive securities: |  |  |  |  |
RSUs | 586 |  |  | 410 |  |  | 37 |
Stock options | 24 |  |  | 8 |  |  | 39 |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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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=6371337&loc=d3e3550-109257 + Details
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