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Earnings Per Share (Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2019
Aug. 31, 2018
Feb. 01, 2019
Nov. 30, 2018
Numerator:            
Net income $ 68,136 $ 87,476 $ 145,608 $ 73,529    
Less: Distributed earnings allocated to nonvested restricted stock (48) (12) (76) (37)    
Less: Undistributed earnings allocated to nonvested restricted stock (365) (472) (825) (388)    
Numerator for basic earnings per share 67,723 86,992 144,707 73,104    
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes 0 796 541 2,389    
Add: Undistributed earnings allocated to nonvested restricted stock 365 472 825 388    
Less: Undistributed earnings reallocated to nonvested restricted stock (354) (416) (769) (335)    
Numerator for diluted earnings per share $ 67,734 $ 87,844 $ 145,304 $ 75,546    
Denominator:            
Weighted average shares outstanding — basic (in shares) 88,262 87,951 87,630 87,565    
Effect of dilutive securities: Share-based payments (in shares) 4,580 4,719 4,501 5,246    
Effect of dilutive securities: Convertible senior notes (in shares) 0 8,402 1,901 8,402    
Weighted average shares outstanding — diluted (in shares) 92,842 101,072 94,032 101,213    
Basic earnings (loss) per share (in dollars per share) $ 0.77 $ 0.99 $ 1.65 $ 0.83    
Diluted earnings (loss) per share (in dollars per share) $ 0.73 $ 0.87 $ 1.55 $ 0.75    
Antidilutive securities excluded from computation of earnings per share (in shares) 600 1,600 800      
Mortgages and notes payable $ 1,860,135   $ 1,860,135     $ 2,060,263
1.375% Convertible senior notes due February 1, 2019 [Member] | Convertible Notes Payable [Member]            
Mortgages and notes payable $ 0   $ 0   $ 230,000 $ 229,788
Senior notes, rate         1.375%