Derivatives (Schedule Of Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative	$ 290	$ (747)	$ 544	$ (557)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income		57	(170)	96
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income
Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative	200	(510)	379	(344)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income	2	44	(119)	101
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income
Research And Development [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative	51	(136)	93	(95)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income	(2)	6	(30)	22
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income
Sales And Marketing [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative	39	(105)	72	(74)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income		3	(21)	17
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income
Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative		4		(44)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income		4		(44)
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income