Schedule Of Gross Carrying Amount And Accumulated Amortization Of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jul. 01, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 81,959	$ 81,959
Accumulated Amortization	29,349	19,963
Net Carrying Amount	52,610	61,996
Developed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	40,200	40,200
Accumulated Amortization	16,053	9,416
Net Carrying Amount	24,147	30,784
Weighted Average Useful Life, years	5 years	5 years
In-Process Research And Development
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,900	1,900
Accumulated Amortization	138
Net Carrying Amount	1,762	1,900
Weighted Average Useful Life, years	7 years	7 years
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,600	17,600
Accumulated Amortization	1,948	623
Net Carrying Amount	15,652	16,977
Weighted Average Useful Life, years	11 years	11 years
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,200	5,200
Accumulated Amortization	519	303
Net Carrying Amount	4,681	4,897
Weighted Average Useful Life, years	10 years	10 years
Lease Agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,600	2,600
Accumulated Amortization	463	245
Net Carrying Amount	2,137	2,355
Weighted Average Useful Life, years	8 years	8 years
Other Intangible Assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	14,459	14,459
Accumulated Amortization	10,228	9,376
Net Carrying Amount	4,231	5,083
Weighted Average Useful Life, years	5 years	5 years
Total Other Acquired Intangible Assets From Vocollect Acquisition
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	67,500	67,500
Accumulated Amortization	19,121	10,587
Net Carrying Amount	$ 48,379	$ 56,913