Derivatives (Schedule Of Cash Flow Hedges) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Effective Portion of Derivative	$ 591	$ (468)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income (Loss)	(74)	29
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income (Loss)
Cost Of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Effective Portion of Derivative	410	(291)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income (Loss)	(57)	59
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income (Loss)
Research And Development [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Effective Portion of Derivative	103	(76)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income (Loss)	(12)	7
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income (Loss)
Sales And Marketing [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Effective Portion of Derivative	78	(58)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income (Loss)	(5)	6
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income (Loss)
Other Income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Effective Portion of Derivative		(43)
Pretax Gain (Loss) Recognized in Income on Effective Portion of Derivative as a Result of Reclassification from Accumulated Other Comprehensive Income (Loss)		(43)
Ineffective Portion of Gain (Loss) on Derivative and Amount Excluded from Effectiveness Testing Recognized in Income (Loss)