Selling, General and Administrative Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Sep. 29, 2012	Oct. 01, 2011
Selling, General and Administratie Expense [Abstract]
Distribution costs	$ 4.4	$ 3.8

Selling, General and Administrative Distribution Costs, Excluding Freight Costs

No definition available.

Name:	dla_SellingGeneralAndAdministrativeDistributionCostsExcludingFreightCosts
Namespace Prefix:	dla_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration