Summary of Balance Sheet Information Related to Leases (Details) - USD ($) $ in Thousands	Oct. 02, 2020		Dec. 31, 2019
Operating leases
Operating lease right-of-use assets	$ 33,841		$ 35,180
Current portion of operating lease liabilities	5,553		5,043
Operating lease liabilities	32,499		34,108
Total operating lease liabilities	38,052		39,151
Finance leases
Finance lease right-of-use assets gross	20,242		19,748
Finance lease right-of-use assets accumulated depreciation	(5,528)		(4,649)
Finance lease assets included in property, plant and equipment, net	$ 14,714		$ 15,099
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentNet		us-gaap:PropertyPlantAndEquipmentNet
Current portion of finance lease liabilities	$ 9,503		$ 1,307
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherAccruedLiabilitiesCurrent		us-gaap:OtherAccruedLiabilitiesCurrent
Noncurrent portion of finance lease liabilities	$ 6,052		$ 14,845
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent		us-gaap:OtherLiabilitiesNoncurrent
Total finance lease liabilities	$ 15,555	[1]	$ 16,152
Weighted-average remaining lease term (in years)
Operating leases	9 years 7 months 6 days		10 years 2 months 12 days
Finance leases	3 years 9 months 18 days		4 years 8 months 12 days
Weighted-average discount rate
Operating leases	5.56%		5.60%
Finance leases	3.02%		3.09%

[1] Future minimum lease payments under finance leases include the exercise price of an option to purchase a facility in Germany in 2021.