Summary of Significant Accounting Policies - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Numerator:
Net (loss) income	$ (117,500)	$ (162,519)	$ 45,918	$ 17,916	$ (280,019)	$ 63,834
Loss (income) from consolidated joint venture attributable to noncontrolling interest	2,162		(1,955)		2,620	(3,554)
Preferred stock dividends	(3,207)		(3,207)		(6,414)	(6,414)
Distributions paid on unvested restricted stock compensation			(61)		(69)	(122)
Undistributed income allocated to unvested restricted stock compensation			(156)			(167)
Numerator for basic and diluted (loss) income attributable to common stockholders	$ (118,545)		$ 40,539		$ (283,882)	$ 53,577
Denominator:
Weighted average basic and diluted common shares outstanding (in shares)	214,225		227,389		217,631	227,305
Basic and diluted (loss) income attributable to common stockholders per common share (in dollars per share)	$ (0.55)		$ 0.18		$ (1.30)	$ 0.24

Amount of paid and unpaid cash dividends declared for award under share-based payment arrangement.

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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 of Net Income (Loss) attributable to noncontrolling interest.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS).

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