Net Loss Per Share/Unit (Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net loss attributable to the Company	$ (106,522)	$ (54,720)	$ (136,492)	$ (346,164)
Less: dividends to preferred shares and participating securities	17,973	23,291	35,951	46,723
Net loss attributable to common stockholders/unitholders	$ (124,495)	$ (78,011)	$ (172,443)	$ (392,887)
Weighted average number of common shares outstanding - basic and diluted	903,339,143	815,406,408	903,168,654	682,178,587
Basic and diluted net loss per share from continuing operations attributable to common stockholders	$ (0.14)	$ (0.10)	$ (0.19)	$ (0.58)