Organization and Summary of Significant Accounting Policies - Interest Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Interest expense incurred primarily on the Senior Secured Notes	$ (23.7)	$ (23.6)	$ (23.5)
Miscellaneous interest income	0.3	0.8	1.9
Interest expense, net	$ (23.4)	$ (22.8)	$ (21.6)

Amount of the cost of borrowed funds accounted for as interest expense for debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration