Sales Contract Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	May 31, 2021	May 31, 2020
Movement In Contract With Customer, Liability [Roll Forward]
Balance at February 28/29,	$ 16,138	$ 18,418
Contract liabilities added during the period	12,375	4,796
Sales recognized during the period	(11,415)	(5,849)
Balance at May 31,	$ 17,098	$ 17,365