Fair Value Measurements (Assets and Liabilities Carried at Fair Value Measured on a Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 35,481	$ 69,661	$ 65,328	$ 63,201
Fair Value, Recurring [Member] | Carrying Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	(2,906)	(2,447)
Foreign Currency Contract, Asset, Fair Value Disclosure	451	750
Foreign exchange derivative liabilities, net	(1,538)	(594)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	35,481	69,661
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	(2,906)	(2,447)
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Foreign exchange derivative liabilities, net	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0	0
Fair Value, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	451	750
Foreign exchange derivative liabilities, net	(1,538)	(594)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0	0
Fair Value, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Marketable securities	0	0
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Foreign exchange derivative liabilities, net	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	$ 35,481	$ 69,661