| Quarterly Financial Information | 
 The following tables set
 forth the Company’s unaudited quarterly results of operations
 for each of the quarters in fiscal 2016 and fiscal 2015. The
 Company’s quarterly periods are the 13 weeks ending on the
 Saturday closest to
 April 30, July 31, October 31 and
 January 31. 
 
   
 
 
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 2016 | 
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 First | 
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 Second | 
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 Third | 
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 Fourth | 
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 | (In thousands, except per share data) | 
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  Net sales 
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 $ | 
 1,073,716 | 
   | 
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 $ | 
 1,069,215 | 
   | 
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 $ | 
 1,131,232 | 
   | 
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 $ | 
 1,580,574 | 
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  Cost of sales 
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 683,286 | 
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 684,377 | 
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 704,179 | 
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 1,035,666 | 
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  Gross profit 
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 390,430 | 
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 384,838 | 
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 427,053 | 
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 544,908 | 
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  Selling, general and
 administrative expenses 
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 240,724 | 
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 236,380 | 
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 280,464 | 
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 316,266 | 
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  Pre-opening
 expenses 
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 2,542 | 
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 4,689 | 
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 6,928 | 
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 4,412 | 
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  Operating income 
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 147,164 | 
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 143,769 | 
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 139,661 | 
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 224,230 | 
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  Interest income,
 net 
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 (315 | 
 )  | 
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 (248 | 
 )  | 
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 (211 | 
 )  | 
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 (116 | 
 )  | 
  
 
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  Income before income
 taxes 
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 147,479 | 
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 144,017 | 
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 139,872 | 
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 224,346 | 
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  Income tax
 expense 
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 55,503 | 
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 54,013 | 
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 52,310 | 
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 84,128 | 
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  Net income 
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 $ | 
 91,976 | 
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 $ | 
 90,004 | 
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 $ | 
 87,562 | 
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 $ | 
 140,218 | 
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  Net income per common
 share: 
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  Basic 
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 $ | 
 1.46 | 
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 $ | 
 1.44 | 
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 $ | 
 1.40 | 
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 $ | 
 2.25 | 
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  Diluted 
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 $ | 
 1.45 | 
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 $ | 
 1.43 | 
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 $ | 
 1.40 | 
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 $ | 
 2.24 | 
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 2015 | 
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 First | 
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 Second | 
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 Third | 
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 Fourth | 
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 | (In thousands, except per share data) | 
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  Net sales 
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 $ | 
 868,122 | 
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 $ | 
 876,999 | 
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 $ | 
 910,700 | 
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 $ | 
 1,268,295 | 
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  Cost of sales 
  | 
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 564,938 | 
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 570,524 | 
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 575,062 | 
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 829,259 | 
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  Gross profit 
  | 
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 303,184 | 
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 306,475 | 
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 335,638 | 
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 439,036 | 
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  Selling, general and
 administrative expenses 
  | 
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 192,485 | 
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 183,937 | 
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 218,763 | 
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 268,169 | 
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  Pre-opening
 expenses 
  | 
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 3,117 | 
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 4,078 | 
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 6,106 | 
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 1,381 | 
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  Operating income 
  | 
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 107,582 | 
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 118,460 | 
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 110,769 | 
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 169,486 | 
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  Interest income,
 net 
  | 
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 (311 | 
 )  | 
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 (276 | 
 )  | 
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 (283 | 
 )  | 
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 (273 | 
 )  | 
  
 
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  Income before income
 taxes 
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 107,893 | 
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 118,736 | 
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 111,052 | 
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 169,759 | 
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  Income tax
 expense 
  | 
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 40,947 | 
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 44,567 | 
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 39,982 | 
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 61,936 | 
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  Net income 
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 $ | 
 66,946 | 
   | 
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 $ | 
 74,169 | 
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 $ | 
 71,070 | 
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 $ | 
 107,823 | 
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  Net income per common
 share: 
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  Basic 
  | 
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 $ | 
 1.04 | 
   | 
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 $ | 
 1.16 | 
   | 
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 $ | 
 1.11 | 
   | 
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 $ | 
 1.69 | 
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  Diluted 
  | 
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 $ | 
 1.04 | 
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 $ | 
 1.15 | 
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 $ | 
 1.11 | 
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 $ | 
 1.69 | 
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