Quarterly report pursuant to Section 13 or 15(d)

Repurchase of Common Stock (Details)

v2.4.1.9
Repurchase of Common Stock (Details) (USD $)
0 Months Ended 3 Months Ended
Jan. 23, 2013
Dec. 27, 2014
Equity [Abstract]    
Authorized amount $ 30,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount  
Aggregated number of shares repurchased, shares   2,122,246dla_StockRepurchaseProgramAggregatedNumberOfSharesRepurchased
Aggregated shares repurchased, value   25,300,000dla_StockRepurchaseProgramAggregateSharesRepurchasedValue
Remaining authorized shares   $ 4,700,000us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount