Stockholders' Equity (Schedule of Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Other Comprehensive Income (Loss), Tax		$ (21)	$ (5)	$ (16)
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion		453	314	686
Other Comprehensive Income (Loss), Tax	[1]	0	0	0
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member] | Net Revenue [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion		462	459	844
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member] | Cost Of Revenue [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion		6	4	(9)
Derivatives Designated As Hedging Instruments [Member] | Foreign Currency Forward Contracts [Member] | Operating Expenses [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Gain or (Loss) Reclassified from OCI into Income-Effective Portion		$ (15)	$ (149)	$ (149)

[1] Under our tax structure all hedging gains and losses from derivative contracts are ultimately borne by a legal entity in a jurisdiction with no income tax.