Earnings Per Share (Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2023	May 31, 2022	May 31, 2023	May 31, 2022
Numerator:
Net income	$ 164,442	$ 210,670	$ 289,942	$ 344,927
Less: Distributed earnings allocated to nonvested restricted stock	(91)	(64)	(176)	(129)
Less: Undistributed earnings allocated to nonvested restricted stock	(1,119)	(957)	(1,866)	(1,539)
Numerator for basic earnings per share	163,232	209,649	287,900	343,259
Add: Undistributed earnings allocated to nonvested restricted stock	1,119	957	1,866	1,539
Less: Undistributed earnings reallocated to nonvested restricted stock	(1,085)	(931)	(1,811)	(1,495)
Numerator for diluted earnings per share	$ 163,266	$ 209,675	$ 287,955	$ 343,303
Denominator:
Weighted average shares outstanding — basic (in shares)	81,764	87,858	82,607	88,069
Effect of dilutive securities: Share-based payments (in shares)	2,542	2,458	2,534	2,621
Weighted average shares outstanding — diluted (in shares)	84,306	90,316	85,141	90,690
Basic earnings per share (in dollars per share)	$ 2.00	$ 2.39	$ 3.49	$ 3.90
Diluted earnings per share (in dollars per share)	$ 1.94	$ 2.32	$ 3.38	$ 3.79
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0	0