XML 70 R58.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Dividends - Additional Information (Detail) (USD $) | 1 Months Ended
--- | ---
Jul. 30, 2012 | Oct. 29, 2012 Subsequent Event [Member]
Common Dividends Declared Per Share [Line Items] |  |
Cash dividend declared per common share | $ 0.11 | $ 0.11

X
- Details
Name: | cgnx_CommonDividendsDeclaredPerShareLineItems
Namespace Prefix: | cgnx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration