Summary of Significant Accounting Policies (Details)	6 Months Ended		12 Months Ended
	Jun. 25, 2017	Jun. 26, 2016	Dec. 25, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fiscal year duration	364 days		364 days
First quarter duration	91 days	91 days
Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fiscal year duration	364 days
Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Fiscal year duration	371 days