Income Taxes (Details 6) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013
United States federal [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	$ 114,646	[1]
California State [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	24,946
States other than California [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	5,572
Foreign Jurisdiction [Member]
Summary of tax credit carryforwards
Tax credit carryforwards	$ 14,675

[1] Certain of Cadence's foreign tax credits are anticipated and as result do not yet have an expiration period.