Shareholders' Deficit - Other Information Pertaining to Options (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Share-based Payment Arrangement [Abstract]
Weighted-average grant date fair value of stock options granted (in dollars per share)	$ 15.10	$ 18.97	$ 13.96
Total intrinsic value (at exercise) of stock options exercised	$ 14,357	$ 9,636	$ 3,459

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(2)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration