Earnings per Share - Computation for Basic and Diluted Earnings (loss) per Share (Detail) - $ / shares	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	25,995,127	26,036,393	25,829,804
Effect of dilutive options			12,375
Diluted weighted average common shares outstanding	25,995,127	26,036,393	25,842,179
Earnings per share
Basic	$ 0.93	$ 1.47	$ 1.45
Diluted	0.93	1.47	1.45
Cash dividends	$ 0.900	$ 0.900	$ 0.875