Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 29, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Deferred tax assets	$ 111,831	$ 104,931
Deferred tax liabilities	(66,551)	(65,715)
Total deferred tax assets	45,280	39,216
Valuation allowance	(45,520)	(39,416)
Net deferred tax liabilities	$ (240)	$ (200)