Derivative Instruments (Amount Of Gain Or (Loss) Reclassified From Accumulated OCI In Income (Effective Portion)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI in Income (Effective Portion)	$ (2,361)	$ (1,322)	$ (1,129)
Interest Expense [Member] | Currency Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI in Income (Effective Portion)		(121)	(35)
Cost Of Products Sold [Member] | Foreign Exchange Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI in Income (Effective Portion)	(290)	465	1,038
Cost Of Products Sold [Member] | Natural Gas Contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI in Income (Effective Portion)	$ (2,071)	$ (1,666)	$ (2,132)