Leases - Operating Lease Costs (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019 USD ($)
Leases [Abstract]
Weighted average remaining lease term	7 years 4 months 17 days
Weighted average discount rate	9.10%
Cash paid for amounts included in the measurement of lease liabilities	$ 27,027
Leased assets obtained in exchange for new operating lease liabilities	$ 21,847