Basis of Presentation and Description of Business (Details)	6 Months Ended
Mar. 29, 2014
Basis of Presentation [Abstract]
Weeks in fiscal year, minimum	364 days
Weeks in fiscal year, maximum	371 days

Fiscal Period, Weeks in Fiscal Year Range, Maximum

No definition available.

Name:	dla_FiscalPeriodWeeksinFiscalYearRangeMaximum
Namespace Prefix:	dla_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration