Commitments And Contingencies (Narrative) (Details) (USD $)	1 Months Ended	2 Months Ended		6 Months Ended	12 Months Ended
	Oct. 31, 2008 companies	Dec. 31, 2012	Jul. 03, 2012	Jun. 30, 2013 patent claims	Dec. 31, 2012 case patent supplier	Jan. 03, 2013 case	Sep. 17, 2012 patent	Jul. 31, 2012 patent	May 09, 2012 claims	Mar. 03, 2012 claims	Dec. 28, 2011 case	Nov. 16, 2011 actions patents	Nov. 19, 2010 patent	Sep. 14, 2010 patents
Commitments And Contingencies [Line Items]
Operating leases expiration date				Dec. 31, 2026
Number of days for non-cancellation of purchase obligations prior to expected shipment date (in days)				30 days
Non-cancelable purchase commitments				$ 217,000,000
Continued vesting period after termination without cause (in years)				1 year
Number of exiting cases and procedings that the Company currently believes are liking to have a material adverse effect on its financial position				0
The future legnth the Company currently considered regarding existing cases and proceedings that are likely to have a material advese effect on it (in months)				12 months
Number of offensive cases against the company and another company should be consolidated						2
Maximum number of asserted claims in filed status report ( in claims)									10
Number of other companies lawsuit was filed against (in companies)	30
Number of patents company is accused of infringing (in patents)							3	6						8
Number of Remaining Patents Company is Accused of Infringing				5
Number of wired claims rejected in the patent (in claims)										5
Number of patents in which company filed judgement action for nonInfringement and invalidity (in patents)												17
Number of actions brought against end user customers and other companies (in actions)												15
number of other similar cases will now proceed in the Northern District of Illinois in a consolidated fashion											15
Length of trial period (in days)		10 days	10 days
Financial Impact to the Company				0
Number of patents company filed suit for infringement of (in patents)													4
Litigation settlement expense				3,555,000
Liability for Director and Officer Indemnification Agreements				0
Liability For Customers, Distributors, and Resellers Indemnification Agreements				0
Number of patents the Company brought its declaratory judgment actotion on non-infringement and invalidity								17
Minimum Number of Lawsuits Filed Against Third-Party Suppliers By Competitor					100
Number of Third-Party Suppliers Filing Declaratory Judgement Actions					2
Number of Three Asserted Patents with Pending Reexamination					1
46 To 60 Days [Member]
Commitments And Contingencies [Line Items]
Percentage of cancelable orders				50.00%
31 To 45 Days [Member]
Commitments And Contingencies [Line Items]
Percentage of cancelable orders				25.00%
Minimum [Member] | 46 To 60 Days [Member]
Commitments And Contingencies [Line Items]
Required notice period prior to the expected shipment date (in days)				46 days
Minimum [Member] | 31 To 45 Days [Member]
Commitments And Contingencies [Line Items]
Required notice period prior to the expected shipment date (in days)				31 days
Maximum [Member] | 46 To 60 Days [Member]
Commitments And Contingencies [Line Items]
Required notice period prior to the expected shipment date (in days)				60 days
Maximum [Member] | 31 To 45 Days [Member]
Commitments And Contingencies [Line Items]
Required notice period prior to the expected shipment date (in days)				45 days
Chief Executive Officer [Member]
Commitments And Contingencies [Line Items]
Number of weeks for which salary is payable upon termination of employment without cause (in days)				365 days
Number of years after change of control to trigger full accelerated vest of unvested portion of stock options (in years)				1 year
Senior Vice President Of Worldwide Operations And Support [Member]
Commitments And Contingencies [Line Items]
Number of weeks for which salary is payable upon termination of employment without cause (in days)				273 days
Other Key Executives [Member]
Commitments And Contingencies [Line Items]
Number of weeks for which salary is payable upon termination of employment without cause (in days)				182 days
Maximum number of years covered by accelerated vest for other key executives if term without cause is within one year of change in control (in years)				2 years
D-Link [Member] | Ericsson v. NETGEAR [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value				435,000
NETGEAR [Member] | Ericsson v. NETGEAR [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value				3,555,000
Toshiba [Member] | Ericsson v. NETGEAR [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value				2,445,000
Belkin [Member] | Ericsson v. NETGEAR [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value				600,000
Acer Gateway [Member] | Ericsson v. NETGEAR [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value				1,170,000
Dell [Member] | Ericsson v. NETGEAR [Member]
Commitments And Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value				$ 1,920,000