Leases - Lease Cost (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 29, 2019 USD ($)	Sep. 29, 2019 USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 9,003	$ 27,817
Right-of-use assets obtained in exchange for lease obligations, operating leases	$ 1,363	$ 25,622
Weighted average remaining lease term, operating leases	6 years 4 months 24 days	6 years 4 months 24 days
Weighted average discount rate, operating lease	4.50%	4.50%