Revised Supplemental Guarantor Information - Components of Supplemental Condensed Combining Statements of Cash Flows (Parenthetical) (Detail) (As Reclassified [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2010
As Reclassified [Member]
Guarantor Obligations [Line Items]
Reclassification of Equity income of subsidiaries to a non-guarantor subsidiary, from Net cash provided (used in) operating activities to a financing activity	$ 14,653
Reclassification of loan repayment to a non-guarantor subsidiary, from Net cash provided (used in) operating activities to a financing activity	$ 43,300