Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, at Dec. 31, 2008	$ 1,612,676	$ 7	$ 1,839,313	$ (220,722)	$ (5,922)
Beginning Balance, Shares at Dec. 31, 2008		69,515,526
Components of comprehensive loss:
Net loss	(237,963)			(237,963)
Net unrealized holding gains (losses) on investments, net of tax	816				816
Swaplet amortization and reclassification of losses included in earnings on derivative instruments, including tax effect	6,119				6,119
Comprehensive loss	(231,028)
Share-based compensation expense	43,306		43,306
Accretion of redeemable non-controlling interests, net of tax	(1,529)		(1,529)
Issuance of common stock	263,719	1	263,718
Issuance of common stock, Shares		7,000,000
Issuance of common stock under share-based compensation plans, net of repurchases	3,386		3,386
Issuance of common stock under share-based compensation plans, net of repurchases, Shares		1,008,514
Beginning Balance, at Dec. 31, 2009	1,690,530	8	2,148,194	(458,685)	1,013
Beginning Balance, Shares at Dec. 31, 2009		77,524,040
Components of comprehensive loss:
Net loss	(785,055)			(785,055)
Net unrealized holding gains (losses) on investments, net of tax	(254)				(254)
Less: reclassification adjustment for losses included in net loss, net of tax	(1,457)				(1,457)
Comprehensive loss	(786,766)
Share-based compensation expense	36,609		36,609
Accretion of redeemable non-controlling interests, net of tax	(86,898)		(86,898)
Issuance of common stock under share-based compensation plans, net of repurchases	1,535		1,535
Issuance of common stock under share-based compensation plans, net of repurchases, Shares		913,269
Gain on formation of joint ventures, net of tax	56,272		56,272
Beginning Balance, at Dec. 31, 2010	911,282	8	2,155,712	(1,243,740)	(698)
Beginning Balance, Shares at Dec. 31, 2010		78,437,309
Components of comprehensive loss:
Net loss	(317,677)			(317,677)
Net unrealized holding gains (losses) on investments, net of tax	(14)				(14)
Comprehensive loss	(317,691)
Share-based compensation expense	15,328		15,328
Accretion of redeemable non-controlling interests, net of tax	5,124		5,124
Issuance of common stock under share-based compensation plans, net of repurchases	1,346		1,346
Issuance of common stock under share-based compensation plans, net of repurchases, Shares		486,740
Preferred distributions to joint venture partners	(2,074)		(2,074)
Beginning Balance, at Dec. 31, 2011	$ 613,315	$ 8	$ 2,175,436	$ (1,561,417)	$ (712)
Beginning Balance, Shares at Dec. 31, 2011		78,924,049