Earnings Per Share - Computation for Basic and Diluted Earnings Per Share (Detail) - $ / shares	3 Months Ended		6 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2021	Aug. 31, 2020
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	26,080,121	25,974,412	26,055,056	25,965,370
Effect of dilutive RSUs	90,275		91,365
Diluted weighted average common shares outstanding	26,170,396	25,974,412	26,146,421	25,965,370
Earnings per share
Net earnings - basic	$ 0.29	$ 0.25	$ 0.57	$ 0.41
Net earnings - diluted	0.29	0.25	0.57	0.41
Common Stock Dividends Per Share Cash Paid	$ 0.250	$ 0.225	$ 0.475	$ 0.450