Supplemental Guarantor Information - Components of Supplemental Condensed Combining Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities	$ (55,418)	$ (18,813)
Net cash provided by (used in) financing activities	218,072	(34,856)
Net increase (decrease) in cash and cash equivalents	55,585	(57,622)
As Previously Reported [Member]
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities		(6,281)
Payments from (advances to) subsidiaries		(32,908)
Net cash provided by (used in) financing activities		(44,902)
Net increase (decrease) in cash and cash equivalents		(53,568)
Reclassify the non-cash equity income (loss) of subsidiaries [Member]
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities		(7,705)
Payments from (advances to) subsidiaries		7,705
Net cash provided by (used in) financing activities		7,705
As Reclassified [Member]
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities		(13,986)
Payments from (advances to) subsidiaries		(25,203)
Net cash provided by (used in) financing activities		(37,197)
Net increase (decrease) in cash and cash equivalents		$ (53,568)