Comprehensive Income (Loss) (Schedule Of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Comprehensive Income (Loss) [Abstract]
Foreign currency translation adjustment, Before Tax Amount	$ (176)	$ (79)	$ (255)	$ 132
Foreign currency translation adjustment, Net of Tax Amount	(176)	(79)	(255)	132
Unrealized gains (losses) on available-for-sale securities, Before Tax Amount	(27)	5	6	(1)
Unrealized gains (losses) on available-for-sale securities, Tax Provision/(Benefit)		(3)		(5)
Unrealized gains (losses) on available-for-sale securities, Net of Tax Amount	(27)	8	6	4
Reclassification adjustment for gains on available-for-sale securities included in net income, Before Tax Amount	(2)	(4)	21	(4)
Reclassification adjustment for gains on available-for-sale securities included in net income, Tax Provision/(Benefit)
Reclassification adjustment for gains on available-for-sale securities included in net income, Net of Tax Amount	(2)	(4)	21	(4)
Total unrealized gains (losses) on available-for-sale securities	(29)	1	27	(5)
Total net changes related to available-for-sale-securities, Tax Provision/(Benefit)		(3)		(5)
Total net changes related to available-for-sale securities, Net of Tax Amount	(29)	4	27
Unrealized gains (losses) on foreign exchange forward contracts, Before Tax Amount	(153)	(69)	(292)	254
Unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)		(23)		89
Unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount	(153)	(46)	(292)	165
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Before Tax Amount	(14)	95	(47)	170
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Tax Provision/(Benefit)		32		58
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Net of Tax Amount	(14)	63	(47)	112
Total unrealized gains (losses) on foreign exchange forward contracts	(167)	26	(339)	424
Total unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)		9		147
Total unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount	(167)	17	(339)	277
Other comprehensive income (loss), Before Tax Amount	(372)	(52)	(567)	551
Other comprehensive income (loss), Tax Provision/(Benefit)		6		142
Other comprehensive income (loss), Net of Tax Amount	$ (372)	$ (58)	$ (567)	$ 409