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, 2020	May 31, 2019
Components of net periodic benefit cost
Service cost	$ 318	$ 272
Interest cost	438	564
Expected return on plan assets	(1,019)	(1,050)
Amortization of:
Unrecognized net loss	840	509
Net periodic benefit cost	$ 577	$ 295