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Per Share Data and Stockholders' Equity - Dilutive Effect on Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Weighted Average Shares |  |
Weighted average common shares outstanding | 42,615 | 42,838
Diluted earnings (loss) (shares) | 42,615 | 42,888
From Continuing Operations |  |
Earnings (loss) | $ (199,131) | $ 42,349
Basic earnings (loss) per share (usd per share) | $ (4.67) | $ 0.99
From Discontinued Operations |  |
Earnings (loss) | $ (202) | $ (128)
Basic earnings (loss) per share (usd per share) | $ (0.01) | $ (0.01)
Net Income (Loss) |  |
Earnings (loss) | $ (199,333) | $ 42,221
Basic earnings (loss) per share (usd per share) | $ (4.68) | $ 0.98
Effect of dilutive securities: |  |
Earnings (loss) per share from continuing operations (usd per share) | (4.67) | 0.99
Earnings (loss) per share from discontinued operations (usd per share) | (0.01) | (0.01)
Earnings (loss) per common share (usd per share) | $ (4.68) | $ 0.98

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Namespace Prefix: | us-gaap_
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