Leases - Components of Lease Expense (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Nov. 30, 2021	Nov. 30, 2020	Nov. 30, 2021	Nov. 30, 2020
Lease Cost [Abstract]
Operating lease cost	$ 1,454	$ 1,572	$ 4,688	$ 4,773
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	1,459	1,568	4,675	4,743
Right-of-use assets obtained in exchange for lease obligations, Operating leases		$ 138	$ 3,441	$ 194
Weighted Average Remaining Lease Terms, Operating leases	3 years		3 years
Weighted Average Discount Rate, Operating leases	3.64%		3.64%