Derivatives (Schedule Of Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income on Effective Portion of Derivative	$ (69)	$ 218	$ 254	$ 190
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income	(95)	68	(170)	39
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	(50)	164	179	166
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income	(69)	56	(120)	57
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	(10)	39	43	40
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income	(15)	15	(29)	16
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	(9)	32	32	32
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income	(11)	14	(21)	14
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		(17)		(48)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income		(17)		(48)
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income