Income Taxes Reconciliation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of Statutory Federal Tax Rate [Line Items]
Computed at federal statutory rate	$ (77,374)	$ (37,862)	$ (75,863)
State income taxes, net of federal income tax benefit	(4,825)	(1,927)	(8,020)
Other, net	(5,956)	(3,062)	(2,011)
Continuing operations	$ (88,155)	$ (42,851)	$ (85,894)
Computed at federal statutory rate	(35.00%)	(35.00%)	(35.00%)
State income taxes, net of federal income tax benefit	(2.20%)	(1.80%)	(3.70%)
Other, net	(2.70%)	(2.80%)	(0.90%)
Effective Income Tax Rate, Continuing Operations, Total	(39.90%)	(39.60%)	(39.60%)