Derivative Instruments (Effect of Derivatives in Cash Flow Hedging Relationships) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Designated as Hedging Instrument [Member]
Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion)	$ 137	$ (3,042)	$ 496	$ (4,266)
Amount of Gain (Loss) Reclassified from AOCI(L) into Income (Effective Portion)	(373)	(979)	(373)	(1,215)
Designated as Hedging Instrument [Member] | Commodity Contracts [Member]
Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion)	96		373	(54)
Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net Sales [Member]
Amount of Gain (Loss) Reclassified from AOCI(L) into Income (Effective Portion)	(373)		(373)	(221)
Designated as Hedging Instrument [Member] | Euro Forward Contracts [Member]
Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion)	0	(2,756)	0	(3,926)
Designated as Hedging Instrument [Member] | Euro Forward Contracts [Member] | Cost of Product Sold [Member]
Amount of Gain (Loss) Reclassified from AOCI(L) into Income (Effective Portion)		(979)		(994)
Designated as Hedging Instrument [Member] | Interest Rate Swap Agreements [Member]
Amount of Gain (Loss) on Derivative Recognized in AOCI(L) (Effective Portion)	41	(286)	123	(286)
Not Designated as Hedging Instrument [Member]
Amount of Gain (Loss) on Derivative Recognized in Income	0	0	(407)	0
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member] | Net Sales [Member]
Amount of Gain (Loss) on Derivative Recognized in Income	$ 0	$ 0	$ (407)	$ 0