Solar Services - Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 28, 2020	Jun. 28, 2020	Dec. 29, 2019
Leases [Abstract]
Solar power systems leased	$ 116,416	$ 116,416	$ 116,948
Solar power systems leased and to be leased, gross	116,416	116,416	116,948
Less: accumulated depreciation and impairment	(63,975)	(63,975)	(62,610)
Solar power systems leased, net	52,441	52,441	$ 54,338
Noncash impairment charge	$ 0	$ 4,000