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Comprehensive Income (Loss) (Schedule Of Other Comprehensive Income (Loss)) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Comprehensive Income (Loss) [Abstract]    
Foreign currency translation adjustment, Before Tax Amount $ (79) $ 211
Foreign currency translation adjustment, Net of Tax Amount (79) 211
Unrealized gains (losses) on available-for-sale securities, Before Tax Amount 33 (6)
Unrealized gains (losses) on available-for-sale securities, Tax Provision/(Benefit)   (2)
Unrealized gains (losses) on available-for-sale securities, Net of Tax Amount 33 (4)
Reclassification adjustment for (gains) on available-for-sale securities included in net income, Before Tax Amount 23   
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 23   
Total unrealized gains (losses) on available-for-sale securities 56 (6)
Total net changes related to available-for-sale-securities, Tax Provision/(Benefit)   (2)
Total net changes related to available-for-sale securities, Net of Tax Amount 56 (4)
Unrealized gains (losses) on foreign exchange forward contracts, Before Tax Amount (139) 323
Unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)   112
Unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount (139) 211
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Before Tax Amount (33) 75
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Tax Provision/(Benefit)   26
Reclassification adjustment for (gains) losses on foreign exchange forward contracts included in net income, Net of Tax Amount (33) 49
Total unrealized gains (losses) on foreign exchange forward contracts (172) 398
Total unrealized gains (losses) on foreign exchange forward contracts, Tax Provision/(Benefit)   138
Total unrealized gains (losses) on foreign exchange forward contracts, Net of Tax Amount (172) 260
Other comprehensive income (loss), Before Tax Amount (195) 603
Other comprehensive income (loss), Tax Provision/(Benefit)   136
Other comprehensive income (loss), Net of Tax Amount $ (195) $ 467