Balance Sheet Components (Schedule Of Goodwill By Segment) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Apr. 05, 2011
Goodwill [Roll Forward]
Goodwill	$ 85,944	$ 74,198
Relative Fair Value Approach Allocation			0
Goodwill acquired during the period	14,936	11,746
Goodwill	100,880	85,944
Old Segment [Member]
Goodwill [Roll Forward]
Goodwill	0	74,198
Relative Fair Value Approach Allocation			(74,198)
Goodwill acquired during the period	0	0
Goodwill	0	0
Retail [Member]
Goodwill [Roll Forward]
Goodwill	33,546	0
Relative Fair Value Approach Allocation			33,546
Goodwill acquired during the period	11,895	0
Goodwill	45,441	33,546
Commercial [Member]
Goodwill [Roll Forward]
Goodwill	32,043	0
Relative Fair Value Approach Allocation			32,043
Goodwill acquired during the period	3,041	0
Goodwill	35,084	32,043
Service Provider [Member]
Goodwill [Roll Forward]
Goodwill	20,355	0
Relative Fair Value Approach Allocation			8,609
Goodwill acquired during the period	0	11,746
Goodwill	$ 20,355	$ 20,355