Sales Contract Liability (Details) - USD ($) $ in Thousands	9 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
Movement In Contract With Customer, Liability [Roll Forward]
Balance at February 29,	$ 18,418	$ 56,928
Contract liabilities added during the period	5,017	22,237
Sales recognized during the period	(11,914)	(52,298)
Balance at November 30,	$ 11,521	$ 26,867