Leases - Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Aug. 31, 2022	Aug. 31, 2021	Aug. 31, 2022	Aug. 31, 2021
Lease, Cost [Abstract]
Operating lease cost	$ 1,515	$ 1,595	$ 3,028	$ 3,234
Supplemental cash flow information related to leases was as follows:
Cash paid for amounts included in the measurement of lease liabilities, Operating cash flows from operating leases	1,517	1,586	3,028	3,216
Right-of-use assets obtained in exchange for lease obligations, Operating leases	$ 0	$ 838	$ 806	$ 3,441
Weighted Average Remaining Lease Terms, Operating leases	3 years	4 years	3 years	4 years
Weighted Average Discount Rate, Operating leases	3.63%	3.66%	3.63%	3.66%