Leases - Components of Lease Expense (Detail) $ in Thousands	3 Months Ended	9 Months Ended
	Nov. 30, 2019 USD ($)	Nov. 30, 2019 USD ($)
Lease Cost [Abstract]
Operating lease cost	$ 1,675	$ 4,874
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	1,663	4,849
Right-of-use assets obtained in exchange for lease obligations, Operating leases	$ 1,494	$ 4,359
Weighted Average Remaining Lease Terms, Operating leases	5 years	5 years
Weighted Average Discount Rate, Operating leases	4.38%	4.38%