Comprehensive Income (Loss) (Schedule Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Comprehensive Income (Loss) [Abstract]
Foreign currency translation adjustment, Before Tax Amount	$ 212	$ (271)	$ 344	$ (28)
Foreign currency translation adjustment, Net of Tax Amount	212	(271)	344	(28)
Unrealized gains (losses) on available-for-sale securities, Before Tax Amount	(72)	(27)	(73)	25
Unrealized gains (losses) on available-for-sale securities, Tax Provision/(Benefit)	(9)	(9)	(14)	9
Unrealized gains (losses) on available-for-sale securities, Net of Tax Amount	(63)	(18)	(59)	16
Reclassification adjustment for (gains) on available-for-sale securities included in net income, Before Tax Amount	(2)		(6)
Reclassification adjustment for (gains) on available-for-sale securities included in net income, Tax Provision/(Benefit)	(1)		(1)
Reclassification adjustment for (gains) on available-for-sale securities included in net income, Net of Tax Amount	(1)		(5)
Unrealized gains (losses) on foreign exchange forward contracts, Before Tax Amount	290	(747)	544	(557)
Unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)	103	(273)	192	(222)
Unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount	187	(474)	352	(335)
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Before Tax Amount		(57)	170	(96)
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Tax Provision/(Benefit)			58
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Net of Tax Amount		(57)	112	(96)
Other comprehensive income (loss), Before Tax Amount	428	(1,102)	979	(656)
Other comprehensive income (loss), Tax Provision/(Benefit)	93	(282)	235	(213)
Other comprehensive income (loss), Net of Tax Amount	$ 335	$ (820)	$ 744	$ (443)

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