Significant Accounting Policies - Adoption of New Lease Accounting Standard (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Financial Statement Line Item
Prepaid expenses and other current assets	$ 69,192	$ 64,650
Other assets, net	62,374	90,491
Other current liabilities	$ 79,551	$ 81,180
ASU 2016-02 - Leases
Adoption of New Lease Accounting Standard
Election of practical expedients package, leases	true
ASU 2016-02 - Leases | Cumulative effect adjustment
Financial Statement Line Item
Prepaid expenses and other current assets	$ (481)
Other assets, net	18,166
Other current liabilities	3,516
Other non-current liabilities	$ 14,169