Intangibles (Schedule Of Gross Carrying Amount And Accumulated Amortization Of Intangible Assets) (Details) (USD $)	3 Months Ended
	Apr. 01, 2012	Apr. 03, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 81,841,000
Accumulated Amortization	24,538,000
Net Carrying Amount	57,303,000
Total amortization expense on other acquired intangibles	4,700,000	1,300,000
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	40,200,000
Accumulated Amortization	12,735,000
Net Carrying Amount	27,465,000
Weighted Average Useful Life, years	5
In-Process Research And Development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,900,000
Accumulated Amortization	69,000
Net Carrying Amount	1,831,000
Weighted Average Useful Life, years	7
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,600,000
Accumulated Amortization	1,286,000
Net Carrying Amount	16,314,000
Weighted Average Useful Life, years	11
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,200,000
Accumulated Amortization	411,000
Net Carrying Amount	4,789,000
Weighted Average Useful Life, years	10
Lease Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,600,000
Accumulated Amortization	357,000
Net Carrying Amount	2,243,000
Weighted Average Useful Life, years	8
Total Other Acquired Intangible Assets From Vocollect Acquisition [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	67,500,000
Accumulated Amortization	14,858,000
Net Carrying Amount	52,642,000
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,341,000
Accumulated Amortization	9,680,000
Net Carrying Amount	$ 4,661,000
Weighted Average Useful Life, years	5