Loss Per Share of Class A and Class B Common Stock Basic and Diluted Net Loss Per Share, 2011 and 2010 (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011		Dec. 31, 2010
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (51,031)	$ (297,762)		$ (413,386)
Dividends, Preferred Stock	0	0		(1,362)
Redemption of preferred stock in excess of carrying value	0	(34,327)		(52,893)
Adjustment of redeemable noncontrolling interests to redemption value	(12,604)	(59,740)		(12,425)
Net loss (income) attributable to noncontrolling interests	(3,742)	18,335		23,746
Net loss attributable to common stockholders	(67,377)	(373,494)		(456,320)
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss)		(297,762)	[1]	(413,386)	[1]
Dividends, Preferred Stock		0	[1]	(1,362)	[1]
Redemption of preferred stock in excess of carrying value		(34,327)	[1]	(52,893)	[1]
Adjustment of redeemable noncontrolling interests to redemption value		(59,740)	[1]	(12,425)	[1]
Net loss (income) attributable to noncontrolling interests		18,335	[1]	23,746	[1]
Net loss attributable to common stockholders		$ (373,494)	[1]	$ (456,320)	[1]
Weighted Average Number of Shares Outstanding, Basic and Diluted		362,261,324	[1],[2]	342,698,772	[1],[2]
Earnings Per Share, Basic and Diluted		$ (1.03)	[1]	$ (1.33)	[1]

[1] (2)The two-class method is not applied for 2011 or 2010 because the Company's two-class common share structure was not implemented until the Company's initial public offering on November 4, 2011. The impact of applying the two-class method from November 4, 2011 to December 31, 2011 would not have impacted the Company's loss per share for 2011.

[2] Stock options, restricted stock units, performance stock units and convertible preferred shares are not included in the calculation of diluted net loss per share for the years ended December 31, 2011 and 2010 because the Company had a net loss for each year. Accordingly, the inclusion of these equity awards would have had an antidilutive effect on the calculation of diluted loss per share.