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Guarantees - Details of Letters of Credit Outstanding (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Apr. 05, 2015
Guarantor Obligations [Line Items] |
Guarantee Amount | $ 2,403 us-gaap_GuaranteeObligationsMaximumExposure
Bank Guarantees |
Guarantor Obligations [Line Items] |
Guarantee Amount | 1,241 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_GuaranteeObligationsByNatureAxis = cgnx_BankGuaranteesMember
Guarantee due date | Various from May 2015 to January 2017
Warranty Bonds |
Guarantor Obligations [Line Items] |
Guarantee Amount | 594 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_GuaranteeObligationsByNatureAxis = cgnx_WarrantyBondsMember
Guarantee due date | Various from May 2015 to December 2016
Performance Bonds |
Guarantor Obligations [Line Items] |
Guarantee Amount | $ 568 us-gaap_GuaranteeObligationsMaximumExposure / us-gaap_GuaranteeObligationsByNatureAxis = us-gaap_PerformanceGuaranteeMember
Guarantee due date | Various from June 2015 to December 2017

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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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- Definition Describe the approximate term of the guarantee or each group of similar guarantees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6851643&loc=d3e12069-110248 + Details
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