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Earnings per Share - Basic and Diluted Earnings Per Common Share (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Feb. 28, 2013
Feb. 29, 2012
Earnings for basic earnings per common share:    
Net earnings $ 85,496 $ 96,717
Net earnings to noncontrolling interests 10,704 19,581
Net earnings to common shareholders 74,792 77,136
Less: Allocation of earnings to participating securities 5,501 [1] 4,643 [1]
Net earnings available to common shareholders 69,291 72,493
Earnings for diluted earnings per common share:    
Net earnings 85,496 96,717
Net earnings to noncontrolling interests 10,704 19,581
Net earnings to common shareholders 74,792 77,136
Add: Mandatorily redeemable convertible preferred stock dividends 1,016 1,016
Less: Allocation of earnings to participating securities 5,500 [1] 4,639 [1]
Net earnings available to common shareholders $ 70,308 $ 73,513
Shares:    
Average common shares used in basic computation 213,732 218,049
Stock options 2 3
Mandatorily redeemable convertible preferred stock 4,110 4,110
Convertible debt      
Average common shares used in diluted computation 217,844 222,162
Earnings per common share:    
Basic $ 0.32 $ 0.33
Diluted $ 0.32 $ 0.33
[1] Represents dividends declared during the period on participating securities plus an allocation of undistributed earnings to participating securities. Net losses are not allocated to participating securities. Participating securities represent restricted stock and restricted stock units for which requisite service has not yet been rendered and amounted to weighted average shares of 16,756,000 and 14,198,000 for the three months ended February 28, 2013 and February 29, 2012, respectively. Dividends declared on participating securities during the three months ended February 28, 2013 and February 29, 2012 amounted to approximately $1,315,000 and $959,000, respectively. Undistributed earnings are allocated to participating securities based upon their right to share in earnings if all earnings for the period had been distributed.