Quarterly report pursuant to Section 13 or 15(d)

Selling, General and Administrative Expense (Details)

v2.4.1.9
Selling, General and Administrative Expense (Details) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 28, 2015
Mar. 29, 2014
Sep. 27, 2014
Selling, General and Administrative Expense [Abstract]          
Distribution costs $ 4,100,000dla_SellingGeneralAndAdministrativeDistributionCostsExcludingFreightCosts $ 4,500,000dla_SellingGeneralAndAdministrativeDistributionCostsExcludingFreightCosts $ 7,800,000dla_SellingGeneralAndAdministrativeDistributionCostsExcludingFreightCosts $ 8,400,000dla_SellingGeneralAndAdministrativeDistributionCostsExcludingFreightCosts  
Strategic Initiative [Member]          
Restructuring Reserve [Roll Forward]          
Accrued strategic initiative charge, opening balance     1,800,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember 		   
Strategic initiative charge     0us-gaap_RestructuringCharges
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember 		  4,000,000us-gaap_RestructuringCharges
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember
Payments 700,000us-gaap_PaymentsForRestructuring
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember 		       
Accrued strategic initiative charge, ending balance $ 1,100,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember 		  $ 1,100,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember 		  $ 1,800,000us-gaap_RestructuringReserve
/ us-gaap_RestructuringPlanAxis
= dla_StrategicInitiativeMember