Pension Plan - Summary of Pension Expense Composed of Components Included in Cost of Goods Sold and Selling, General and Administrative Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Feb. 28, 2021	Feb. 29, 2020	Feb. 28, 2019
Components of net periodic benefit cost
Service cost	$ 1,271	$ 1,088	$ 1,106
Interest cost	1,754	2,254	2,274
Expected return on plan assets	(4,074)	(4,198)	(4,109)
Amortization of:
Unrecognized net loss	3,358	2,036	2,047
Settlement charge	1,619
Net periodic benefit cost	3,928	1,180	1,318
Other changes in Plan Assets and Projected Benefit Obligation Recognized in Other comprehensive Income
Net actuarial loss (gain)	(1,588)	13,371	2,414
Amortization of net actuarial loss	(4,977)	(2,036)	(2,047)
Net of recognized in Other comprehensive Income	(6,565)	11,335	367
Total recognized in net periodic pension cost and other comprehensive income	$ (2,637)	$ 12,515	$ 1,685