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Commitments And Contingencies commitment and contingency (Details) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2013 USD ($) $ / products | Oct. 01, 2017 USD ($) claims patents companies patent case claim | Dec. 04, 2014 USD ($) $ / products | Sep. 14, 2010 patents
Loss Contingencies [Line Items] |  |  |  |
Continued vesting period after termination without cause (in years) |  | 1 year |  |
Liabilities for executive's employment agreements |  | $ 0 |  |
Number of existing cases and proceedings that the Company currently believes are liking to have a material adverse effect on its financial position | claims |  | 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 |  |
Liability For Customers, Distributors, and Resellers Indemnification Agreements |  | $ 0 |  |
Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of Patents Company Is Accused Of Infringing | patents |  |  |  | 8
Foregone colleting verdict amount (in USD) |  |  | $ 3,600,000 |
Foregone reasonable and nondiscriminatory (RAND) royalty rate | $ / products |  |  | 0.15 |
Reasonable and nondiscriminatory (RAND) royalty rate | $ / products | 0.15 |  |  |
Estimated future RAND royalty rate 2018 through 2020 | $ / products | 0.05 |  |  |
Chrismar Systems vs. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of Patents Company Is Accused Of Infringing | patent |  | 4 |  |
Number of active cases the suing company has | case |  | 40 |  |
Realtime Data vs. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of Patents Company Is Accused Of Infringing | patents |  | 4 |  |
Magnacross vs NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of claims on U.S. patent 6917304 | claim |  | 12 |  |
Vivato vs. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of Patents Company Is Accused Of Infringing | patents |  | 3 |  |
Hera Wireless vs. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of Patents Company Is Accused Of Infringing | patents |  | 3 |  |
D-Link [Member] | Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Damages Awarded, Value | $ 435,000 |  |  |
NETGEAR [Member] | Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Damages Awarded, Value | 3,555,000 |  |  |
Acer Gateway [Member] | Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Damages Awarded, Value | 1,170,000 |  |  |
Dell [Member] | Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Damages Awarded, Value | 1,920,000 |  |  |
Toshiba [Member] | Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Damages Awarded, Value | 2,445,000 |  |  |
Belkin [Member] | Ericsson v. NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Loss Contingency, Damages Awarded, Value | $ 600,000 |  |  |
April 12, 2017 [Member] | Magnacross vs NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of active cases the suing company has | companies |  | 5 |  |
December 2016 [Member] | Magnacross vs NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of active cases the suing company has | companies |  | 7 |  |
May 2016 [Member] | Magnacross vs NETGEAR [Member] |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of active cases the suing company has | companies |  | 17 |  |
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 |  |

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