2.4.0.82402406 - Disclosure - Debt Credit Facility (Details Textual)truefalseIn Thousands, unless otherwise specifiedfalse1false USDfalsefalseD2013Q2YTD_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMemberhttp://www.sec.gov/CIK0000813672duration2012-12-30T00:00:002013-06-29T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$2false USDfalsefalse$I2012Q4_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMemberhttp://www.sec.gov/CIK0000813672instant2012-12-29T00:00:000001-01-01T00:00:00usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]2false 4us-gaap_LineOfCreditFacilityAmountOutstandingus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse100000000100000USD$falsetruefalse2truefalsefalse00USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount borrowed under the credit facility as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false2Revolving line of credit3false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3false USDtruefalseD2013Q2YTD_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMemberhttp://www.sec.gov/CIK0000813672duration2012-12-30T00:00:002013-06-29T00:00:00falsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170$nanafalse0Revolving Credit Facility [Member]4true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]5false 4us-gaap_LineOfCreditFacilityInitiationDate1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse002012-12-12falsefalsetrue2falsefalsefalse00falsefalsefalsexbrli:dateItemTypedateDate the credit facility first became available, in CCYY-MM-DD format.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false0Credit facility, date of agreement6false 4us-gaap_LineOfCreditFacilityInterestRateDescriptionus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00Interest accrues based on Cadence's consolidated leverage ratio. Borrowings may be made at LIBOR plus a margin between 1.25% and 2.0% per annum or at the base rate plus a margin between 0.25% and 1.0% per annum, where in each case the margin is determined by reference to a specified leverage ratio. Interest is payable quarterly.falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringDescription of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false0Credit facility, interest rate description7false 4cdns_TermOfLineOfCreditAgreementcdns_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse005 yearsfalsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:durationItemTypenaTerm Of Line Of Credit AgreementNo definition available.false0Credit facility, term8false 4us-gaap_LineOfCreditFacilityCurrentBorrowingCapacityus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse250000000250000USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryAmount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false2Credit facility, current borrowing capacity9false 4cdns_LineOfCreditFacilityAdditionalBorrowingCapacityAvailablecdns_falsecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse150000000150000USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryLine Of Credit Facility, Additional Borrowing Capacity AvailableNo definition available.false2Credit facility additional borrowing capacity available10false 4us-gaap_LineOfCreditFacilityMaximumBorrowingCapacityus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse400000000400000USD$falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryMaximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false2Credit facility, maximum borrowing capacity11false 4us-gaap_LineOfCreditFacilityExpirationDate1us-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse002017-12-12falsefalsetrue2falsefalsefalse00falsefalsefalsexbrli:dateItemTypedateDate the credit facility terminates, in CCYY-MM-DD format.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false0Credit facility, maturity date12false 4us-gaap_LineOfCreditFacilityCollateralus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00The facility is secured by certain accounts receivable and certain equity interests in Cadence’s subsidiaries.falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringDiscussion of whether the borrowings under the credit facility are secured or unsecured and, if secured, a description of collateral (for example, accounts receivable less than 120 days old, finished goods inventory).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(b)) -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false0Credit facility, collateral description13false 4us-gaap_LineOfCreditFacilityCovenantTermsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00The credit facility contains customary negative covenants that, among other things, restrict Cadence's ability to incur additional indebtedness, grant liens and make certain investments, make acquisitions, dispose of certain assets and make certain restricted payments, including dividends. In addition, the credit facility contains financial covenants that require Cadence to maintain a leverage ratio not to exceed 3 to 1, and a minimum interest coverage ratio of 3 to 1.falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringDescription of the conditions for borrowing under the credit facility including the nature of any restrictions.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false0Credit facility, covenant description14false 4us-gaap_LineOfCreditFacilityAmountOutstandingus-gaap_truecreditinstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse100000000100000USD$falsetruefalse2truefalsefalse00USD$falsetruefalsexbrli:monetaryItemTypemonetaryAmount borrowed under the credit facility as of the balance sheet date.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false2Revolving line of credit15false 4us-gaap_LineOfCreditFacilityCovenantComplianceus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00Cadence was in compliance with all financial covenants as of June 29, 2013 and December 29, 2012.falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringIdentification of whether the entity has been in compliance with any credit facility debt covenants during the period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 false0Credit facility, covenant compliance16false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse5false truefalseD2013Q2YTD_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000813672duration2012-12-30T00:00:002013-06-29T00:00:00falsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberfalsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Maximum [Member] | Revolving Credit Facility [Member]17true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]18false 4us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.00350.0035falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.No definition available.false0Credit facility, commitment fee percentage19false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse6false truefalseD2013Q2YTD_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0000813672duration2012-12-30T00:00:002013-06-29T00:00:00falsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberfalsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Minimum [Member] | Revolving Credit Facility [Member]20true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]21false 4us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentageus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.0020.002falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.No definition available.false0Credit facility, commitment fee percentage22false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse7false truefalseI2013Q2_cdns_InterestPaymentOptionAxis_cdns_LineOfCreditFacilityInterestLiborAndSpreadMember_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000813672instant2013-06-29T00:00:000001-01-01T00:00:00falsefalseCredit Facility Interest LIBOR And Spread [Member]cdns_InterestPaymentOptionAxisxbrldihttp://xbrl.org/2006/xbrldicdns_LineOfCreditFacilityInterestLiborAndSpreadMembercdns_InterestPaymentOptionAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberfalsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Credit Facility Interest LIBOR And Spread [Member] | Maximum [Member] | Revolving Credit Facility [Member]23true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]24false 4us-gaap_DebtInstrumentBasisSpreadOnVariableRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.02000.0200falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe percentage points added to the reference rate to compute the variable rate on the debt instrument.No definition available.false0Credit facility, interest rate spread25false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse8false truefalseI2013Q2_cdns_InterestPaymentOptionAxis_cdns_LineOfCreditFacilityInterestLiborAndSpreadMember_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0000813672instant2013-06-29T00:00:000001-01-01T00:00:00falsefalseCredit Facility Interest LIBOR And Spread [Member]cdns_InterestPaymentOptionAxisxbrldihttp://xbrl.org/2006/xbrldicdns_LineOfCreditFacilityInterestLiborAndSpreadMembercdns_InterestPaymentOptionAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberfalsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Credit Facility Interest LIBOR And Spread [Member] | Minimum [Member] | Revolving Credit Facility [Member]26true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]27false 4us-gaap_DebtInstrumentBasisSpreadOnVariableRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.01250.0125falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe percentage points added to the reference rate to compute the variable rate on the debt instrument.No definition available.false0Credit facility, interest rate spread28false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse9false truefalseI2013Q2_cdns_InterestPaymentOptionAxis_cdns_BaseRateAndSpreadMember_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember_us-gaap_RangeAxis_us-gaap_MaximumMemberhttp://www.sec.gov/CIK0000813672instant2013-06-29T00:00:000001-01-01T00:00:00falsefalseCredit facility interest base rate and spread [Member]cdns_InterestPaymentOptionAxisxbrldihttp://xbrl.org/2006/xbrldicdns_BaseRateAndSpreadMembercdns_InterestPaymentOptionAxisexplicitMemberfalsefalseMaximum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MaximumMemberus-gaap_RangeAxisexplicitMemberfalsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Credit facility interest base rate and spread [Member] | Maximum [Member] | Revolving Credit Facility [Member]29true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]30false 4us-gaap_DebtInstrumentBasisSpreadOnVariableRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.010.01falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe percentage points added to the reference rate to compute the variable rate on the debt instrument.No definition available.false0Credit facility, interest rate spread31false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse10false truefalseI2013Q2_cdns_InterestPaymentOptionAxis_cdns_BaseRateAndSpreadMember_us-gaap_CreditFacilityAxis_us-gaap_RevolvingCreditFacilityMember_us-gaap_RangeAxis_us-gaap_MinimumMemberhttp://www.sec.gov/CIK0000813672instant2013-06-29T00:00:000001-01-01T00:00:00falsefalseCredit facility interest base rate and spread [Member]cdns_InterestPaymentOptionAxisxbrldihttp://xbrl.org/2006/xbrldicdns_BaseRateAndSpreadMembercdns_InterestPaymentOptionAxisexplicitMemberfalsefalseMinimum [Member]us-gaap_RangeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_MinimumMemberus-gaap_RangeAxisexplicitMemberfalsefalseRevolving Credit Facility [Member]us-gaap_CreditFacilityAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_RevolvingCreditFacilityMemberus-gaap_CreditFacilityAxisexplicitMembernumberStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Credit facility interest base rate and spread [Member] | Minimum [Member] | Revolving Credit Facility [Member]32true 3us-gaap_LineOfCreditFacilityLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Line of Credit Facility [Line Items]33false 4us-gaap_DebtInstrumentBasisSpreadOnVariableRateus-gaap_truenainstantfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruefalse0.00250.0025falsefalsefalse2falsefalsefalse00falsefalsefalsenum:percentItemTypepureThe percentage points added to the reference rate to compute the variable rate on the debt instrument.No definition available.false0Credit facility, interest rate spreadfalseDebt Credit Facility (Details Textual) (USD $)ThousandsUnKnownUnKnownUnKnowntruefalsefalseSheethttp://www.cadence.com/role/DebtCreditFacilityDetailsTextual233