Other Comprehensive Income (Loss) (Components Of Other Comprehensive Income (loss)) (Details) (USD $)	1 Months Ended	12 Months Ended
	Jun. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Other Comprehensive Income (Loss) [Abstract]
Changes in unrealized gains and (losses) on foreign currency hedging activities, Gross		$ 8,878,000	$ (1,522,000)	$ 31,000
Changes in unrealized gains and (losses) on foreign currency hedging activities, Income tax (benefit)		2,669,000	(573,000)	12,000
Changes in unrealized gains and (losses) on foreign currency hedging activities, Net		6,209,000	(949,000)	19,000
Changes in unrealized gains and (losses) on investments classified as available-for-sale, Gross		(597,000)	(652,000)	1,182,000
Changes in unrealized gains and (losses) on investments classified as available-for-sale, Income tax (benefit)		(212,000)	(246,000)	445,000
Changes in unrealized gains and (losses) on investments classified as available-for-sale, Net	200,000	(385,000)	(406,000)	737,000
Foreign currency translation adjustment		$ (688,000)	$ 67,000	$ 3,972,000