Balance Sheet Components (Schedule Of Goodwill By Segment) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 29, 2013
Goodwill [Roll Forward]
Goodwill (period start)	$ 100,880
Goodwill, Acquired During Period	55,036
Goodwill (period end)	155,916
Retail [Member]
Goodwill [Roll Forward]
Goodwill (period start)	45,441
Goodwill, Acquired During Period	0
Goodwill (period end)	45,441
Commercial [Member]
Goodwill [Roll Forward]
Goodwill (period start)	35,084
Goodwill, Acquired During Period	1,195
Goodwill (period end)	36,279
Service Provider [Member]
Goodwill [Roll Forward]
Goodwill (period start)	20,355
Goodwill, Acquired During Period	53,841
Goodwill (period end)	$ 74,196