Fair Value Measurements - Equity Method Investments Activity (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 28, 2020	Jun. 28, 2020
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash contributions	$ 7,700
SunStrong Partners
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash contributions	7,200
SunStrong Capital Holdings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash contributions	500
Equity investments with FVO
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance as of December 29, 2019		$ 17,500
Equity Distribution1	(7,724)
Additional Investment		0
Ending balance as of June 28, 2020	$ 9,776	$ 9,776