Unaudited Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019	Nov. 30, 2020	Nov. 30, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 8,363	$ 10,553	$ 18,969	$ 29,718
Adjustment to pension, net of taxes	433	221	1,299	677
Comprehensive income	$ 8,796	$ 10,774	$ 20,268	$ 30,395