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Earnings per Share and Equity Transactions (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Net Income (Loss) Allocated to Common Stockholders [Abstract]
Net income from continuing operations	$ 8,947	$ 12,244	$ 66,342	$ 49,609
Net income from discontinued operations	0	9,721	0	8,372
Net income	$ 8,947	$ 21,965	$ 66,342	$ 57,981
Weighted average shares outstanding, basic and diluted (in shares)	768,385,770	773,517,492	772,341,263	773,405,710
Income from continuing operations allocated to common shareholders per share (in dollars per share)	$ 0.01	$ 0.02	$ 0.09	$ 0.06
Income from discontinued operations allocated to common shareholders per share (in dollars per share)	0.00	0.01	0.00	0.01
Net income per common share, basic and diluted (in dollars per share)	$ 0.01	$ 0.03	$ 0.09	$ 0.07

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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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