Fair Value Measurements of Financial Assets and Liabilities - Positions Related to Interest Rate Derivative Contracts (Details) - USD ($) $ in Thousands	Jun. 27, 2020	Dec. 28, 2019
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 5,497	$ 7,985
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative liabilities	12,106	0
Interest rate swap | Designated as Hedging Instrument | Other Payables and Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	5,497	6,382
Interest rate swap | Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	1,603
Interest rate swap | Not Designated as Hedging Instrument | Other Payables and Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	892	0
Interest rate collar | Not Designated as Hedging Instrument | Other Payables and Accrued Expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	839	0
Interest rate collar | Not Designated as Hedging Instrument | Other Liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 10,374	$ 0