Earnings per share - Schedule of Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Feb. 29, 2024	Feb. 28, 2023
Earnings Per Share [Abstract]
Net income	$ 22,639	$ 23,674
Weighted average shares outstanding (in shares)	43,802	43,300
Basic earnings per common share (in dollars per share)	$ 0.52	$ 0.55
Diluted earnings per common share:
Net income	$ 22,639	$ 23,674
Weighted average shares outstanding (in shares)	43,802	43,300
Effect of dilution from common stock equivalents (in shares)	1,024	1,053
Diluted weighted average shares outstanding (in shares)	44,826	44,353
Diluted earnings per share (in dollars shares)	$ 0.51	$ 0.53