Revenues Contract Liability (Details) - USD ($) $ in Thousands	6 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Movement In Contract With Customer, Liability [Roll Forward]
Balance at beginning of period	$ 18,418	$ 56,928
Contract liabilities added during the period	2,738	18,234
Sales recognized during the period	(7,400)	(51,504)
Balance at end of period	$ 13,756	$ 23,658