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Fair-Value Measurements (Schedule of (Losses)/Gains on Changes in Fair Value of Derivative Instruments) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Foreign Currency Options [Member] | Not Designated as Hedging Instrument [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
(Losses)/gains recognized in income, net | $ (92) | $ 80 | $ 125 | $ 154

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