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
	May 31, 2021	May 31, 2020
Components of net periodic benefit cost
Service cost	$ 269	$ 318
Interest cost	420	438
Expected return on plan assets	(931)	(1,019)
Amortization of:
Unrecognized net loss	640	840
Net periodic benefit cost	$ 398	$ 577