Equity Investments - SunStrong LLC (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019	Dec. 29, 2019
Schedule of Investments [Line Items]
Gross loss	$ 21,598	$ 19,800	$ 59,046	$ (17,485)
Net income	19,378	$ 121,459	17,947	31,735
Current assets	1,112,778		1,112,778		$ 1,380,931
Current liabilities	1,083,128		1,083,128		898,409
SunStrong Capital Holdings | Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments [Line Items]
Revenue	29,293		58,757	22,626
Gross loss	(5,458)		(6,896)	(1,209)
Net income	(217)		21,423	$ 3,256
Current assets	93,297		93,297		225,576
Long-term assets	1,278,564		1,278,564		1,049,451
Current liabilities	42,048		42,048		125,601
Long-term liabilities	$ 1,044,357		$ 1,044,357		$ 847,365