Earnings Per Share (Calculation of Basic and Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Feb. 29, 2020	Feb. 28, 2019
Earnings Per Share [Abstract]
Net income	$ 21,116	$ 9,402
Weighted average shares outstanding (in shares)	44,897	44,956
Dilutive impact from common stock equivalents (in shares)	618	330
Diluted weighted average shares outstanding (in shares)	45,515	45,286
Basic earnings per share (in dollars per share)	$ 0.47	$ 0.21
Diluted earnings per share (in dollars per share)	$ 0.46	$ 0.21