The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(2)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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

Trademarks, Other Intangible Assets and Liabilities - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2018	Dec. 27, 2017	Dec. 28, 2016
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 0.1	$ 0.1	$ 0.1
Favorable Leasehold Interest
Finite-Lived Intangible Assets [Line Items]
Intangible asset subject to amortization, weighted average amortization period	2 years
Unfavorable Leasehold Interest Liability
Finite-Lived Intangible Assets [Line Items]
Intangible asset subject to amortization, weighted average amortization period	3 years