Benefit Plans Benefit Plans (Detail 7) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net Periodic Benefit Cost	$ 8,400	$ 10,500	$ 11,600
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	331	264	183
Interest Cost	6,422	6,439	6,782
Expected Return on Plan Assets	(7,499)	(6,906)	(6,842)
Amortization of Gains (Losses)	5,103	5,297	4,659
Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0	0
Net Periodic Benefit Cost	4,357	5,094	4,782
Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service Cost	26,703	12,819	16,552
Interest Cost	24,637	22,438	21,610
Expected Return on Plan Assets	(47,350)	(29,354)	(26,440)
Amortization of Gains (Losses)	(339)	(198)	(324)
Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	59	(550)
Net Periodic Benefit Cost	$ 3,651	$ 5,764	$ 10,848