Earnings Per Share (Basic and Diluted Loss Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2019
Numerator:
Net income	$ 564,746	$ 296,243	$ 268,775
Less: Distributed earnings allocated to nonvested restricted stock	(253)	(197)	(123)
Less: Undistributed earnings allocated to nonvested restricted stock	(2,366)	(1,329)	(1,505)
Numerator for basic earnings per share	562,127	294,717	267,147
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes	0	0	541
Add: Undistributed earnings allocated to nonvested restricted stock	2,366	1,329	1,505
Less: Undistributed earnings reallocated to nonvested restricted stock	(2,286)	(1,278)	(1,412)
Numerator for diluted earnings per share	$ 562,207	$ 294,768	$ 267,781
Denominator:
Weighted average shares outstanding — basic (in shares)	90,401	90,464	87,996
Effect of dilutive securities: Share-based payments (in shares)	3,186	3,622	4,415
Effect of dilutive securities: Convertible senior notes (in shares)	0	0	1,427
Weighted average shares outstanding — diluted (in shares)	93,587	94,086	93,838
Basic earnings per share (in dollars per share)	$ 6.22	$ 3.26	$ 3.04
Diluted earnings per share (in dollars per share)	$ 6.01	$ 3.13	$ 2.85