Comprehensive Income (Loss) (Schedule Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Comprehensive Income (Loss) [Abstract]
Foreign currency translation adjustment, Before Tax Amount	$ 115	$ 212	$ (140)	$ 344
Foreign currency translation adjustment, Net of Tax Amount	115	212	(140)	344
Unrealized gains (losses) on available-for-sale securities, Before Tax Amount	24	(72)	30	(73)
Unrealized gains (losses) on available-for-sale securities, Tax Provision/(Benefit)		(9)		(14)
Unrealized gains (losses) on available-for-sale securities, Net of Tax Amount	24	(63)	30	(59)
Reclassification adjustment for gains on available-for-sale securities included in net income, Before Tax Amount		(2)	21	(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)	21	(5)
Total unrealized gains (losses) on available-for-sale securities	24	(74)	51	(79)
Total net changes related to available-for-sale-securities, Tax Provision/(Benefit)		(10)		(15)
Total net changes related to available-for-sale securities, Net of Tax Amount	24	(64)	51	(64)
Unrealized gains (losses) on foreign exchange forward contracts, Before Tax Amount	61	290	(231)	544
Unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)		103		192
Unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount	61	187	(231)	352
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Before Tax Amount	71		24	170
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	71		24	112
Total unrealized gains (losses) on foreign exchange forward contracts	132	290	(207)	714
Total unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)		103		250
Total unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount	132	187	(207)	464
Other comprehensive income (loss), Before Tax Amount	271	428	(296)	979
Other comprehensive income (loss), Tax Provision/(Benefit)		93		235
Other comprehensive income (loss), Net of Tax Amount	$ 271	$ 335	$ (296)	$ 744