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Earnings Per Share of Common Stock EPS Calculation - Basic (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | [1] | Sep. 30, 2020 | [1] | Jun. 30, 2020 | [1] | Mar. 31, 2020 | [1] | Dec. 31, 2019 | [1] | Sep. 30, 2019 | [1] | Jun. 30, 2019 | [1] | Mar. 31, 2019 | [1] | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Basic earnings (loss) per share of common stock from continuing operations | $ 0.13 | $ (0.52) | $ 1.01 | $ 0.36 | $ (0.06) | $ (0.69) | $ 0.63 | $ (0.26) | $ 0.98 | $ (0.38) | $ (9.08)
Basic (loss) earnings per share of common stock from discontinued operations |  |  |  |  |  |  |  |  | $ (0.07) | $ (0.90) | $ 2.32
Basic (loss) earnings per share of common stock |  |  |  |  |  |  |  |  | $ 0.91 | $ (1.28) | $ (6.76)
[1] | Earnings per share for the year may not equal the sum of quarterly earnings per share due to rounding and the changes in average share calculations.

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