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, 2022	May 31, 2021	May 31, 2022	May 31, 2021
Numerator:
Net income	$ 210,670	$ 143,364	$ 344,927	$ 240,415
Less: Distributed earnings allocated to nonvested restricted stock	(64)	(63)	(129)	(126)
Less: Undistributed earnings allocated to nonvested restricted stock	(957)	(587)	(1,539)	(968)
Numerator for basic earnings per share	209,649	142,714	343,259	239,321
Add: Undistributed earnings allocated to nonvested restricted stock	957	587	1,539	968
Less: Undistributed earnings reallocated to nonvested restricted stock	(931)	(567)	(1,495)	(935)
Numerator for diluted earnings per share	$ 209,675	$ 142,734	$ 343,303	$ 239,354
Denominator:
Weighted average shares outstanding — basic (in shares)	87,858	92,087	88,069	91,904
Effect of dilutive securities: Share-based payments (in shares)	2,458	3,292	2,621	3,239
Weighted average shares outstanding — diluted (in shares)	90,316	95,379	90,690	95,143
Basic earnings (loss) per share (in dollars per share)	$ 2.39	$ 1.55	$ 3.90	$ 2.60
Diluted earnings (loss) per share (in dollars per share)	$ 2.32	$ 1.50	$ 3.79	$ 2.52
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0	0