Valuation And Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Valuation Allowance for Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ (160,266)	[1]	$ (95,734)	[1]	$ (108,737)	[1]
Additions Charged to Costs and Expenses	(48,711)	[1],[2]	(72,502)	[1],[2]	(8,155)	[1],[2]
Additions Charged to Other Accounts	916	[1]	7,970	[1]	21,158	[1]
Balance at End of Period	(208,061)	[1]	(160,266)	[1]	(95,734)	[1]
Allowance for Doubtful and Disputed Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	(24,682)		(29,561)		(42,246)
Additions Charged to Costs and Expenses			(31,897)		(8,108)
Write-offs	2,558		1,757		11,231
Recoveries	8		35,019		9,562
Balance at End of Period	$ (22,116)		$ (24,682)		$ (29,561)

[1] Amounts charged to other accounts included in other comprehensive loss

[2] Net of reductions and other adjustments, all of which are charged to costs and expenses.