Notes Receivable - Summary of Changes in Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2018	Dec. 31, 2017
Notes Receivable
Balance at the beginning of the period	$ 1,047	$ 2,759
Recovered from costs and expenses	(393)	(1,715)
Additions (deductions) including or net of notes written off	2,715	3
Balance at the end of the period	$ 3,369	$ 1,047