Earnings Per Share - Computation for Basic and Diluted Earnings Per Share (Detail) - $ / shares	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	26,020,210	25,974,006	26,053,898	25,978,461
Effect of dilutive RSUs	0		97,582
Diluted weighted average common shares outstanding	26,020,210	25,974,006	26,151,480	25,978,461
Earnings per share
Net earnings - basic	$ 0.29	$ 0.32	$ 0.86	$ 0.73
Net earnings - diluted	0.29	0.32	0.85	0.73
Common Stock Dividends Per Share Cash Paid	$ 0.250	$ 0.225	$ 0.725	$ 0.675