Other Comprehensive Income (Loss) (Components Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other Comprehensive Income (Loss) [Abstract]
Foreign currency translation adjustments	$ (8,963)	$ (8,275)
Unrealized gains and (losses) on hedging transactions, Gross	7,355	(1,523)
Unrealized gains and (losses) on hedging transactions, Income tax expense (benefit)	2,096	(573)
Unrealized gains and (losses) on hedging transactions, Net	5,259	(950)
Unrealized gains and (losses) on investments classified as available-for-sale, Gross	(797)	(200)
Unrealized gains and (losses) on investments classified as available-for-sale, Income tax expense (benefit)	(288)	(76)
Unrealized gains and (losses) on investments classified as available-for-sale, Net	(509)	(124)
Total accumulated other comprehensive income (loss)	$ (4,213)	$ (9,349)