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Earnings per Share (EPS) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Earnings Per Share [Abstract] |  |  |  |  |
Income (loss) from continuing operations |  | $ 10,773 | $ 5,345 | $ (208,071) | $ 32,112
Numerator: |  |  |  |  |
Income (loss) from discontinued operations, net of tax |  | 616 | (8,470) | 7,648 | (14,199)
Net income (loss) |  | 11,389 | (3,125) | (200,423) | 17,913
Less: Preference stock dividend |  | 0 | 0 | 0 | 8
Income (loss) attributable to common stockholders (numerator for basic EPS) |  | $ 11,389 | $ (3,125) | $ (200,423) | $ 17,905
Denominator: |  |  |  |  |
Weighted-average shares used in basic EPS (in shares) |  | 171,828,000 | 170,326,000 | 171,388,000 | 178,048,000
Dilutive effect of common stock equivalents (in shares) |  | 2,876,000 | 875,000 | 0 | 1,048,000
Weighted-average shares used in diluted EPS (in shares) |  | 174,704,000 | 171,201,000 | 171,388,000 | 179,096,000
Basic earnings (loss) per share: |  |  |  |  |
Continuing operations (in dollars per share) | [1] | $ 0.06 | $ 0.03 | $ (1.21) | $ 0.18
Discontinued operations (in dollars per share) | [1] | 0 | (0.05) | 0.04 | (0.08)
Net (loss) income (in dollars per share) | [1] | 0.07 | (0.02) | (1.17) | 0.10
Diluted earnings (loss) per share: |  |  |  |  |
Continuing operations (in dollars per share) | [1] | 0.06 | 0.03 | (1.21) | 0.18
Discontinued operations (in dollars per share) | [1] | 0 | (0.05) | 0.04 | (0.08)
Net (loss) income (in dollars per share) | [1] | $ 0.07 | $ (0.02) | $ (1.17) | $ 0.10
Common stock equivalents excluded from calculation of diluted earnings per share because their impact would be anti-dilutive (in shares) |  | 14,828,000 | 16,182,000 | 15,855,000 | 16,166,000
Dilutive effect of common stock equivalents |  |  |  | 1,604,000 |
[1] | The sum of the earnings per share amounts may not equal the totals due to rounding.

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