Net Loss Per Share/Unit (Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income (loss) attributable to the Company	$ 7,529	$ (280,398)	$ (128,963)	$ (626,562)
Less: dividends to preferred shares and participating securities	18,191	37,643	54,142	84,366
Net loss attributable to common stockholders	$ (10,662)	$ (318,041)	$ (183,105)	$ (710,928)
Weighted average number of common shares outstanding - basic and diluted (shares)	903,461,323	902,096,102	903,267,282	756,289,984
Basic and diluted net loss per share from continuing operations attributable to common stockholders (in dollars per share)	$ (0.01)	$ (0.35)	$ (0.20)	$ (0.94)