Selling, General and Administrative Expense (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 28, 2013	Dec. 29, 2012
Selling, General and Administratie Expense [Abstract]
Distribution costs	$ 3.9	$ 4.2

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