Basis of Presentation and Summary of Significant Accounting Policies New Accounting Standards (Details) - USD ($) $ in Thousands	Mar. 30, 2019		Dec. 30, 2018	Dec. 29, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use asset	$ 94,223	[1]		$ 0
Operating lease liability	$ 105,120
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease right-of-use asset			$ 80,000
Operating lease liability			$ 80,000

[1] Cadence adopted Topic 842, the new accounting standard for leasing arrangements on December 30, 2018, the first day of fiscal 2019. For additional information regarding Cadence’s leases, see Note 6 in the notes to condensed consolidated financial statements.