Restructuring and Other Charges (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 30, 2014	Mar. 31, 2013
Restructuring and Other Charges [Abstract]
Restructuring and other charges	$ 842	$ (30)

Restructuring and other charges not specified within the taxonomy.

No definition available.

Name:	ntgr_RestructuringAndOtherCharges
Namespace Prefix:	ntgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration