Leases - Narrative (Details) $ in Thousands	12 Months Ended
	Dec. 28, 2019 USD ($) transaction	Dec. 30, 2018 USD ($)	Dec. 29, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in financing liabilities	$ (3,774)
Decrease in property, plant and equipment		$ (168,434)	$ (342,820)
Decrease in accumulated deficit	(1,319,891)	(933,273)	(956,970)
Rent expense	41,500
Accelerated rent expense	15,900
Short-term operating lease liability	18,106	19,209	0
Operating lease liabilities - long-term	64,210	62,467
Restructuring charges	70,786
Finance lease cost	500
Amortization of right of use asset	400
Interest cost	100
Finance lease obligation current	1,380		4,718
Long-term financing lease obligation	$ 2,394	0	$ 193,538
Number of sale lease back transactions | transaction	2
Reimbursement expense	$ 31,500
Reimbursement term	10 years
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance lease period	3 years
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Finance lease period	5 years
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in property, plant and equipment		174,386
Decrease in accumulated deficit		23,697
Short-term operating lease liability		19,209
Operating lease liabilities - long-term		62,467
Long-term financing lease obligation		(193,538)
Sale Leaseback Transactions | ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease in financing liabilities		198,300
Decrease in property, plant and equipment		174,600
Decrease in accumulated deficit		$ 23,700
Lease related impairment charges
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Restructuring charges	$ 15,861