Solar Services - Operating Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 29, 2020	Dec. 29, 2019
Leases [Abstract]
Solar power systems leased	$ 116,678	$ 116,948
Solar power systems leased and to be leased, gross	116,678	116,948
Less: accumulated depreciation and impairment	(63,303)	(62,610)
Solar power systems leased, net	53,375	$ 54,338
Noncash impairment charge	$ 4,000