Components Of Provision For Income Taxes From Continuing Operations (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Expenses [Line Items]
Current (foreign)	$ (14,687)	$ (17,391)	$ (20,453)
Deferred (domestic)	(1,499)	3,367	(1,372)
Deferred (foreign)	(19,090)	40,741	3,330
Income tax benefit/(expense)	$ (35,276)	$ 26,717	$ (18,495)