Related Party Transactions - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 28, 2013	Sep. 30, 2012	Sep. 28, 2013	Sep. 30, 2012	Dec. 31, 2012
Transactions With Third Party [Line Items]
Founders' bonus expense	$ 0	$ 0.8	$ 0	$ 1.5
Gigamon LLC members' distribution payable	0.5		0.5		4.8
Cash distribution to members			$ 7.0	$ 13.2

Aggregate cumulative earnings allocated to the limited partners based on the sharing of income or losses between general and limited partners as specified in the partnership agreement, excluding any priority income allocations resulting from incentive distributions or special earnings allocations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-Subparagraph (SAB TOPIC 4.F)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 4

-Section F

Name:	us-gaap_LimitedPartnersCumulativeNetIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant