Consolidated Statement of Stockholders' Equity Statement (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Loss [Member]
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
Net loss	(317,677)			(317,677)
Net unrealized holding gains (losses) on investments and other	(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, shares		486,740
Issuance of common stock under share-based compensation plans, net of repurchases	1,346		1,346
Distributions to joint venture partners	(2,074)		(2,074)
Ending balance at Dec. 31, 2011	613,315	8	2,175,436	(1,561,417)	(712)
Ending balance, shares at Dec. 31, 2011		78,924,049
Net loss	(187,277)			(187,277)
Net unrealized holding gains (losses) on investments and other	27				27
Comprehensive loss	(187,250)
Share-based compensation expense	8,122		8,122
Accretion of redeemable non-controlling interests, net of tax	2,126		2,126
Issuance of common stock under share-based compensation plans, net of repurchases, shares		270,701
Issuance of common stock under share-based compensation plans, net of repurchases	960		960
Distributions to joint venture partners	(4,141)		(4,141)
Ending balance at Dec. 31, 2012	433,132	8	2,182,503	(1,748,694)	(685)
Ending balance, shares at Dec. 31, 2012		79,194,750
Net loss	(603,453)			(603,453)
Net unrealized holding gains (losses) on investments and other	(18)				(18)
Comprehensive loss	(603,471)
Share-based compensation expense	13,470		13,470
Accretion of redeemable non-controlling interests, net of tax	(29,071)		(29,071)
Issuance of common stock under share-based compensation plans, net of repurchases, shares		531,598
Issuance of common stock under share-based compensation plans, net of repurchases	553		553
Distributions to joint venture partners	(8,284)		(8,284)
Ending balance at Dec. 31, 2013	$ (193,671)	$ 8	$ 2,159,171	$ (2,352,147)	$ (703)
Ending balance, shares at Dec. 31, 2013		79,726,348