Fair Value Measurements and Financial Instruments - Liabilities at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Apr. 03, 2020	Jan. 03, 2020	Mar. 29, 2019	Dec. 28, 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit Facility	$ 479,222	$ 68,000
Non-controlling interest subject to put provisions	16,207	15,719	$ 14,581	$ 14,282
Total liabilities measured at fair value	495,429	83,719
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit Facility	0	0
Non-controlling interest subject to put provisions	0	0
Total liabilities measured at fair value	0	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit Facility	479,222	68,000
Non-controlling interest subject to put provisions	0	0
Total liabilities measured at fair value	479,222	68,000
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Credit Facility	0	0
Non-controlling interest subject to put provisions	16,207	15,719
Total liabilities measured at fair value	$ 16,207	$ 15,719