Debt Credit Facility (Details Textual) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 29, 2013	Dec. 29, 2012
Line of Credit Facility [Line Items]
Revolving line of credit	$ 100,000	$ 0
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, date of agreement	Dec. 12, 2012
Credit facility, interest rate description	Interest 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.
Credit facility, term	5 years
Credit facility, current borrowing capacity	250,000
Credit facility additional borrowing capacity available	150,000
Credit facility, maximum borrowing capacity	400,000
Credit facility, maturity date	Dec. 12, 2017
Credit facility, collateral description	The facility is secured by certain accounts receivable and certain equity interests in Cadence’s subsidiaries.
Credit facility, covenant description	The 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.
Revolving line of credit	$ 100,000	$ 0
Credit facility, covenant compliance	Cadence was in compliance with all financial covenants as of June 29, 2013 and December 29, 2012.
Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, commitment fee percentage	0.35%
Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, commitment fee percentage	0.20%
Credit Facility Interest LIBOR And Spread [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	2.00%
Credit Facility Interest LIBOR And Spread [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	1.25%
Credit facility interest base rate and spread [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	1.00%
Credit facility interest base rate and spread [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, interest rate spread	0.25%