Employee Benefit Plans - Net Periodic Benefit Cost (Details) - Foreign Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,589	$ 1,112	$ 1,628
Interest cost	5,676	5,467	5,559
Expected return on plan assets	(5,561)	(6,234)	(6,496)
Amortization of prior service cost	63	(27)	(34)
Amortization of net actuarial (gains)/losses	991	1,394	1,287
Curtailment gain	(453)	0	0
Net periodic benefit cost	$ 2,305	$ 1,712	$ 1,944