Condensed Consolidated Statement of Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Shareholders' equity	Common Stock Class A common shares	Common Stock Class B common shares	Preferred shares	Additional paid-in capital	Accumulated deficit	Noncontrolling interest
Beginning Balances at Dec. 31, 2013	$ 3,650,659	$ 2,934,944	$ 1,848	$ 6	$ 91	$ 2,996,478	$ (63,479)	$ 715,715
Beginning Balances, shares at Dec. 31, 2013			184,869,219	635,075	9,060,000
Increase (Decrease) in Stockholders' Equity
2,770 Property Contribution	112	2				2		110
Share-based compensation	532	532				532
Issuance of Preferred shares, net of offering costs of $838	7,920	7,920			4	7,916
Issuance of Preferred shares, net of offering costs of $838 (in shares)					400,000
Distributions to equity holders:
Preferred shares	(3,121)	(3,121)					(3,121)
Noncontrolling interests	(5,784)							(5,784)
Common shares	(9,275)	(9,275)					(9,275)
Net income (loss)	(6,935)	(10,555)					(10,555)	3,620
Ending Balances at Mar. 31, 2014	$ 3,634,108	$ 2,920,447	$ 1,848	$ 6	$ 95	$ 3,004,928	$ (86,430)	$ 713,661
Ending Balances, shares at Mar. 31, 2014			184,869,219	635,075	9,460,000