Financial Instruments (Schedule Of Change In Acquisition-Related Contingent Consideration Liability) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Business Acquisition, Contingent Consideration [Line Items]
Beginning balance	$ 14,990		$ 19,864
Change in amount of contingent consideration	(557)		(796)
Payments	(370)		(577)
Ending balance	15,276		20,076
Fair Value Adjustment [Member]
Business Acquisition, Contingent Consideration [Line Items]
Change in amount of contingent consideration	557	[1]	796	[1]
Foreign Currency Translation [Member]
Business Acquisition, Contingent Consideration [Line Items]
Change in amount of contingent consideration	$ 99		$ (7)

[1] Adjustments to fair value related to accretion of contingent consideration are recorded in "Acquisition-related contingent consideration" on the Condensed Consolidated Statements of Comprehensive Income.