Earnings Per Share - Summary of Computation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Numerator:
Net loss from continuing operations attributable to common stockholders	$ (15,943)	$ (8,234)	$ (19,521)	$ (6,266)
Earnings allocated to unvested participating securities	(18)	(14)	(37)	(26)
Numerator for loss from continuing operations per common share - basic and diluted	(15,961)	(8,248)	(19,558)	(6,292)
Net income from discontinued operations attributable to common stockholders		1,964		3,344
Earnings allocated to unvested participating securities		(4)		(11)
Numerator for income from discontinued operations per common share - basic and diluted		1,960		3,333
Numerator for loss per common share - basic and diluted	$ (15,961)	$ (6,288)	$ (19,558)	$ (2,959)
Denominator:
Denominator for basic loss per common share - weighted average shares	218,696,284	221,573,199	218,681,228	224,671,206
Denominator for diluted loss per common share - weighted average shares	218,696,284	221,573,199	218,681,228	224,671,206
(Loss) Income per Common Share - Basic and Diluted:
Continuing operations, net	$ (0.07)	$ (0.04)	$ (0.09)	$ (0.03)
Discontinued operations, net		0.01		0.02
Loss per common share - basic and diluted	$ (0.07)	$ (0.03)	$ (0.09)	$ (0.01)

Earnings (loss) allocated to unvested participating securities basic and diluted on continuing operation.

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Earnings loss allocated to unvested participating securities basic and diluted on discontinued operation.

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Numerator for income from continuing operations per common share - basic and diluted.

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Numerator for income (loss) per common share basic and diluted.

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Numerator for income loss per common share basic and diluted on discontinued operation.

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Per basic and diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation, when the per share amount is the same.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares.

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Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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