Leases - Narrative (Details) $ in Thousands	6 Months Ended
	Jun. 27, 2020 USD ($) ft²	Jun. 29, 2019 USD ($)	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease right of use asset	$ 22,401		$ 8,691
Operating lease, liability	22,956
Right-of-use asset obtained in exchange for operating lease liability	15,300
Operating lease, payments	$ 1,700	$ 1,700
Israel
Lessee, Lease, Description [Line Items]
Area of land (in sq ft) | ft²	121,400
Lessee, operating lease, term	12 years 6 months
Operating lease right of use asset	$ 14,800
Operating lease, liability	$ 14,800
Buildings and Vehicles | Minimum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term (years)	1 year
Buildings and Vehicles | Maximum
Lessee, Lease, Description [Line Items]
Lessee, operating lease, remaining lease term (years)	6 years