Commitments And Contingencies (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 27, 2015 USD ($) claims case	Jun. 30, 2013 USD ($) $ / products	Sep. 27, 2015 USD ($) claims	Jul. 01, 2015 patent	Dec. 31, 2014 USD ($) $ / products	Dec. 31, 2013 USD ($) $ / d	Jul. 01, 2012 patent	Sep. 14, 2010 patents
Purchase Obligation [Line Items]
Lease Expiration Date			Dec. 31, 2026
Purchase Commitment, Remaining Minimum Amount Committed	$ 158,000,000		$ 158,000,000
Number of days for non-cancellation of purchase obligations prior to expected shipment date			30 days
Loss Contingencies [Line Items]
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		$ 0
Number of exiting cases and proceedings that the Company currently believes are liking to have a material adverse effect on its financial position | claims	0		0
The future length the Company currently considered regarding existing cases and proceedings that are likely to have a material adverse effect on it (in months)			12 months
Liability for Director and Officer Indemnification Agreements	$ 0		$ 0
Liability For Customers, Distributors, and Resellers Indemnification Agreements	$ 0		$ 0
Number of active cases the suing company has in a district | case	40
Chief Executive Officer [Member]
Loss 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]
Loss 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]
Loss 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
46 To 60 Days [Member]
Purchase Obligation [Line Items]
Percentage of cancelable orders.	50.00%		50.00%
31 To 45 Days [Member]
Purchase Obligation [Line Items]
Percentage of cancelable orders.	25.00%		25.00%
Minimum [Member] | 46 To 60 Days [Member]
Purchase Obligation [Line Items]
Required Notice Period Prior To The Expected Shipment Date			46 days
Minimum [Member] | 31 To 45 Days [Member]
Purchase Obligation [Line Items]
Required Notice Period Prior To The Expected Shipment Date			31 days
Maximum [Member] | 46 To 60 Days [Member]
Purchase Obligation [Line Items]
Required Notice Period Prior To The Expected Shipment Date			60 days
Maximum [Member] | 31 To 45 Days [Member]
Purchase Obligation [Line Items]
Required Notice Period Prior To The Expected Shipment Date			45 days
Ericsson v. NETGEAR [Member]
Loss Contingencies [Line Items]
Number of Patents Company Is Accused Of Infringing							5	8
Reasonable and nondiscriminatory (RAND) royalty rate (USD per unit) | $ / products		0.15
Foregone colleting verdict amount (in USD)					$ 3,600,000	$ 3,555,000
Foregone collecting pre-judgment interest ( in USD)						$ 224,141
Foregone collecting pre judgment interest (USD per day) | $ / d						336
Foregone Collecting Costs (in USD)						$ 41,667
Foregone reasonable and nondiscriminatory (RAND) royalty rate | $ / products					0.15
Ericsson v. NETGEAR [Member] | D-Link [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		$ 435,000
Ericsson v. NETGEAR [Member] | NETGEAR [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		3,555,000
Ericsson v. NETGEAR [Member] | Toshiba [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		2,445,000
Ericsson v. NETGEAR [Member] | Belkin [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		600,000
Ericsson v. NETGEAR [Member] | Acer Gateway [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		1,170,000
Ericsson v. NETGEAR [Member] | Dell [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Awarded, Value		$ 1,920,000
Chrismar Systems vs. NETGEAR [Member]
Loss Contingencies [Line Items]
Number of Patents Company Is Accused Of Infringing | patent				4