Other (Expense) Income, Net (Schedule Of Other (Expense) Income, Net) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Other (Expense) Income, Net [Abstract]
Interest income	$ 2,056		$ 2,393		$ 1,863
Interest expense	(3,957)		(4,445)		(2,827)
Foreign currency (losses) gains, net	(4,300)	[1]	(3,211)	[1]	3,640	[1]
Forward foreign currency contracts gains (losses), net	1,952	[2]	(459)	[2]	(893)	[2]
Other (expense) income, net	(553)		65		766
Total other (expense) income, net	$ (4,802)		$ (5,657)		$ 2,549

[1] Our foreign currency (losses) gains, net are predominantly attributable to the re-measurement gains or losses on our net balances of monetary assets and liabilities in our foreign subsidiaries which were primarily denominated in the Euro, and to a lesser extent, the British Pound and Canadian Dollar. The foreign currency re-measurement adjustments to these balance sheet items are calculated by comparing the currency spot rates at the end of a month to the spot rates at the end of the previous month.

[2] Relates to changes in fair value of our forward foreign currency contracts not designated as hedging instruments. Please refer to Note 15 - Derivative Instruments for further details.