Stockholders' Equity (Schedule of Reclassifications Out Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)	$ 533	$ 453		$ 314
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	820	453		314
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(287)	0	[1]	0	[1]
Amounts reclassified from accumulated other comprehensive income (loss)	533	453		314
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	1,100	462		459
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)	6		4
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	$ (274)	$ (15)		$ (149)

[1] Under the Company's 2015 and 2014 tax structure, all hedging gains and losses from derivative contracts were ultimately borne by a legal entity in a jurisdiction with no income tax.