Basis of Presentation Basis of Presentation (Details)	3 Months Ended
Sep. 29, 2012
Basis of Presentation [Abstract]
Weeks in fiscal year, minimum	P52W
Weeks in fiscal year, maximum	P53W

Fiscal Period, Weeks in Fiscal Year Range, Maximum

No definition available.

Name:	dla_FiscalPeriodWeeksInFiscalYearRangeMaximum
Namespace Prefix:	dla_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration