Significant Accounting Policies (Details)	3 Months Ended	12 Months Ended
	Mar. 29, 2014	Dec. 27, 2014	Dec. 28, 2013
Basis of Presentation and Principles of Consolidation
Length of fiscal year	91 days	371 days	364 days
Number of days in each fiscal quarter for 52-week fiscal year	91 days
Minimum
Basis of Presentation and Principles of Consolidation
Length of fiscal year	364 days
Maximum
Basis of Presentation and Principles of Consolidation
Length of fiscal year	371 days