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, 2020	Aug. 31, 2019	Aug. 31, 2020	Aug. 31, 2019	Nov. 30, 2019	Feb. 01, 2019
Numerator:
Net income	$ 78,415	$ 68,136	$ 190,152	$ 145,608
Less: Distributed earnings allocated to nonvested restricted stock	(42)	(48)	(129)	(76)
Less: Undistributed earnings allocated to nonvested restricted stock	(360)	(365)	(875)	(825)
Numerator for basic earnings per share	78,013	67,723	189,148	144,707
Interest expense and amortization of debt issuance costs associated with convertible senior notes, net of taxes	0	0	0	541
Add: Undistributed earnings allocated to nonvested restricted stock	360	365	875	825
Less: Undistributed earnings reallocated to nonvested restricted stock	(346)	(354)	(843)	(769)
Numerator for diluted earnings per share	$ 78,027	$ 67,734	$ 189,180	$ 145,304
Denominator:
Weighted average shares outstanding — basic (in shares)	90,535	88,262	90,292	87,630
Effect of dilutive securities: Share-based payments (in shares)	3,570	4,580	3,496	4,501
Effect of dilutive securities: Convertible senior notes (in shares)	0	0	0	1,901
Weighted average shares outstanding — diluted (in shares)	94,105	92,842	93,788	94,032
Basic earnings (loss) per share (in dollars per share)	$ 0.86	$ 0.77	$ 2.09	$ 1.65
Diluted earnings (loss) per share (in dollars per share)	$ 0.83	$ 0.73	$ 2.02	$ 1.55
Antidilutive securities excluded from computation of earnings per share (in shares)	0	600	0	600
Mortgages and notes payable	$ 1,747,704		$ 1,747,704		$ 1,748,747
1.375% Convertible senior notes due February 1, 2019 [Member] | Convertible Notes Payable [Member]
Mortgages and notes payable						$ 230,000
Senior notes, rate						1.375%