Revised Supplemental Guarantor Information - Components of Supplemental Condensed Combining Statements of Cash Flows (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities	$ (108,819)	$ (80,284)	$ (209,081)
Net cash provided by (used in) financing activities	(52,666)	(552,844)	191,520
Net increase (decrease) in cash and cash equivalents	(183,266)	(228,864)	(662,027)
As Previously Reported[Member]
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities	83,797	(39,462)	36,971
Payments from (advances to) subsidiaries	(168,169)	(44,961)	(293,883)
Net cash provided by (used in) financing activities	(248,460)	(621,073)	(98,682)
Net increase (decrease) in cash and cash equivalents	(187,662)	(221,469)	(675,088)
Reclassify Adjustment [Member]
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities	(81,836)	18,966	28,647
Payments from (advances to) subsidiaries	81,836	(18,966)	(28,647)
Net cash provided by (used in) financing activities	81,836	(18,966)	(28,647)
Net increase (decrease) in cash and cash equivalents	0	0	0
As Reclassified [Member]
Guarantor Obligations [Line Items]
Net cash provided by (used in) operating activities	1,961	(20,496)	65,618
Payments from (advances to) subsidiaries	(86,333)	(63,927)	(322,530)
Net cash provided by (used in) financing activities	(166,624)	(640,039)	(127,329)
Net increase (decrease) in cash and cash equivalents	$ (187,662)	$ (221,469)	$ (675,088)