Leases (Details 2) - USD ($) $ in Thousands	Dec. 28, 2019		Dec. 29, 2018
Leases [Abstract]
Right-of-use assets	$ 100,343	[1]	$ 0
Operating lease, liability, current	25,558
Operating lease liabilities	84,782	[1]	$ 0
Total lease liabilities	$ 110,340
Operating lease, weighted average remaining lease term	5 years 1 month 6 days
Operating lease, weighted average discount rate,	4.50%

[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 7 in the notes to consolidated financial statements.