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	3 Months Ended		6 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Components of net periodic benefit cost
Service cost	$ 236	$ 268	$ 472	$ 537
Interest cost	491	421	983	841
Expected return on plan assets	(925)	(930)	(1,850)	(1,861)
Amortization of:
Unrecognized net loss	603	640	1,205	1,280
Settlement charge	0	0	0	0
Net periodic benefit cost	$ 405	$ 399	$ 810	$ 797