Valuation And Qualifying Accounts And Reserves (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	$ 294,506	$ 222,968	$ 190,077
Additions (deductions) charged to costs and expenses	8,225	90,280	34,579
Accounts written off	(1,219)	(2,716)	(4,853)
Translation adjustments	(6,948)	(16,026)	3,165
Balance at end of period	294,564	294,506	222,968
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	6,324	10,263	11,156
Additions (deductions) charged to costs and expenses	(518)	(1,352)	2,928
Accounts written off	(1,219)	(2,716)	(4,853)
Translation adjustments	(902)	129	1,032
Balance at end of period	3,685	6,324	10,263
Valuation Allowance On Credit And Operating Loss Carryforwards And Other Net Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of period	288,182	212,705	178,921
Additions (deductions) charged to costs and expenses	8,743	91,632	31,651
Translation adjustments	(6,046)	(16,155)	2,133
Balance at end of period	$ 290,879	$ 288,182	$ 212,705