Income Taxes Reconciliation (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Computed at federal statutory rate	$ (77,268)	$ (60,652)	$ (77,374)
State income taxes, net of federal income tax benefit	(650)	(8,026)	(4,825)
Other, net	222	(24)	(5,956)
Income tax benefit	$ (77,696)	$ (68,702)	$ (88,155)
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Computed at federal statutory rate	(35.00%)	(35.00%)	(35.00%)
State income taxes, net of federal income tax benefit	(0.30%)	(4.60%)	(2.20%)
Other, net	0.10%	0.00%	(2.70%)
Effective Income Tax Rate, Continuing Operations, Total	(35.20%)	(39.60%)	(39.90%)