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Unaudited Quarterly Results Of Operations (Tables)
 12 Months Ended
Oct. 01, 2017
Selected Quarterly Financial Information [Abstract]  
Quarterly Results Of Operations
 
 
16 Weeks
Ended
 
12 Weeks Ended
Fiscal Year 2017
 
January 22,
2017
 
April 16,
2017
 
July 9,
2017
 
October 1,
2017
Revenues
 
$
487,933

 
$
369,389

 
$
357,846

 
$
338,746

Earnings from operations
 
$
73,117

 
$
65,650

 
$
66,981

 
$
60,393

Net earnings
 
$
35,929

 
$
33,094

 
$
36,351

 
$
29,958

Net earnings per share:
 
 
 
 
 
 
 
 
Basic
 
$
1.12

 
$
1.07

 
$
1.23

 
$
1.02

Diluted
 
$
1.11

 
$
1.06

 
$
1.22

 
$
1.01

 
 
16 Weeks
Ended
 
12 Weeks Ended
 
13 Weeks
Ended
Fiscal Year 2016
 
January 17,
2016
 
April 10,
2016
 
July 3,
2016
 
October 2,
2016
Revenues
 
$
470,823

 
$
361,151

 
$
368,938

 
$
398,419

Earnings from operations
 
$
62,514

 
$
52,786

 
$
55,705

 
$
58,910

Net earnings
 
$
33,221

 
$
28,682

 
$
30,189

 
$
31,981

Net earnings per share:
 
 
 
 
 
 
 
 
Basic
 
$
0.94

 
$
0.85

 
$
0.92

 
$
0.98

Diluted
 
$
0.92

 
$
0.84

 
$
0.91

 
$
0.97