Earnings Per Share - Computation for Basic and Diluted Earnings (loss) Per Share (Detail) - $ / shares	3 Months Ended
	May 31, 2019	May 31, 2018
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	26,028,337	25,333,673
Effect of dilutive options		30,099
Diluted weighted average common shares outstanding	26,028,337	25,363,772
Earnings per share
Net earnings - basic	$ 0.37	$ 0.37
Net earnings - diluted	0.37	0.36
Cash dividends	$ 0.225	$ 0.200