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Stockholders' Equity (Tables)
 9 Months Ended
Aug. 31, 2017
Equity [Abstract]  
Summary of Changes in Stockholders’ Equity
A summary of changes in stockholders’ equity is presented below (in thousands):
 
Nine Months Ended August 31, 2017
 
Number of Shares
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common
Stock
 
Grantor
Stock
Ownership
Trust
 
Treasury
Stock
 
Common Stock
 
Paid-in Capital
 
Retained Earnings
 
Accumulated Other Comprehensive Loss
 
Grantor Stock
Ownership Trust
 
Treasury Stock
 
Total Stockholders’ Equity
Balance at November 30, 2016
116,224

 
(9,432
)
 
(21,720
)
 
$
116,224

 
$
696,938

 
$
1,563,742

 
$
(16,057
)
 
$
(102,300
)
 
$
(535,402
)
 
$
1,723,145

Net income
—

 
—

 
—

 
—

 
—

 
96,249

 
—

 
—

 
—

 
96,249

Dividends on common stock
—

 
—

 
—

 
—

 
—

 
(6,479
)
 
—

 
—

 
—

 
(6,479
)
Employee stock options/other
1,205

 
—

 
—

 
1,205

 
19,472

 
—

 
—

 
—

 
—

 
20,677

Stock awards
69

 
279

 
27

 
69

 
(3,767
)
 
—

 
—

 
3,021

 
677

 
—

Stock-based compensation
—

 
—

 
—

 
—

 
9,893

 
—

 
—

 
—

 
—

 
9,893

Stock repurchases
—

 
—

 
(152
)
 
—

 
—

 
—

 
—

 
—

 
(2,543
)
 
(2,543
)
Balance at August 31, 2017
117,498

 
(9,153
)
 
(21,845
)
 
$
117,498

 
$
722,536

 
$
1,653,512

 
$
(16,057
)
 
$
(99,279
)
 
$
(537,268
)
 
$
1,840,942