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Earnings per Share - Computation of Earnings per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income (numerator):
Net income (loss)	$ 15,066	$ (3,753)	$ 26,862	$ 1,275
Noncontrolling interest	(30)	(761)	(331)	3,075
Dividends on preferred shares	15,282	7,412	28,869	12,981
Net loss attributable to common shareholders	$ (186)	$ (10,404)	$ (1,676)	$ (14,781)
Denominator
Weighted-average shares (denominator) (in shares)	258,900,456	238,481,265	251,685,993	228,819,566
Net loss per share - basic and diluted (in dollars per share)	$ 0.00	$ (0.04)	$ (0.01)	$ (0.06)

X

- Definition

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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- Definition

Amount of Net Income (Loss) attributable to noncontrolling interest.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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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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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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