Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Six Percent Convertible Guaranteed Note [Member]	Dec. 31, 2012 Six Percent Convertible Guaranteed Note [Member]	Dec. 31, 2011 Six Percent Convertible Guaranteed Note [Member]	Dec. 31, 2010 Six Percent Convertible Guaranteed Note [Member]
BASIC
Income (loss) from continuing operations attributable to common shareholders									$ (31,777)	$ 156,709	$ (30,194)
Income (loss) from discontinued operations attributable to common shareholders									17,688	112	(73,527)
Net income (loss) attributable to common shareholders									(14,089)	156,821	(103,721)
Weighted-average common shares outstanding – basic									209,797,238	159,109,424	152,473,336
Income (loss) from continuing operations, basic (usd per share)									$ (0.15)	$ 0.99	$ (0.20)
Income (loss) from discontinued operations, basic (usd per share)									$ 0.08	$ 0.00	$ (0.48)
Net income (loss) attributable to common shareholders, basic (usd per share)	$ (0.04)	$ 0.01	$ 0	$ (0.04)	$ (0.04)	$ 1.09	$ (0.02)	$ (0.01)	$ (0.07)	$ 0.99	$ (0.68)
Impact of assumed conversions:
Share Options									0	0	0
Operating Partnership Units									0	1,585	0
6.00% Convertible Guaranteed Notes									0	8,953	0
Debt interest rate percentage												6.00%	6.00%	6.00%	6.00%
Income (loss) from continuing operations attributable to common shareholders, net of deductions									(31,777)	167,247	(30,194)
Operating Partnership Units									0	(392)	0
Income (loss) from discontinued operations attributable to common shareholders, net of deductions									17,688	(280)	(73,527)
Net income (loss) attributable to common shareholders									$ (14,089)	$ 166,967	$ (103,721)
Effect of dilutive securities:
Share Options									0	306,449	0
Operating Partnership Units									0	4,438,708	0
6.00% Convertible Guaranteed Notes									0	15,805,245	0
Weighted-average common shares outstanding									209,797,238	179,659,826	152,473,336
Income (loss) per common share:
Income (loss) from continuing operations, diluted (usd per share)									$ (0.15)	$ 0.93	$ (0.20)
Income (loss) from discontinued operations, diluted (usd per share)									$ 0.08	$ 0.00	$ (0.48)
Net income (loss) attributable to common shareholders, diluted (usd per share)	$ (0.04)	$ 0.01	$ 0	$ (0.04)	$ (0.04)	$ 0.96	$ (0.02)	$ (0.01)	$ (0.07)	$ 0.93	$ (0.68)