Segment Reporting - Summary of Tangible Long-Lived Assets (Detail) - USD ($) $ in Thousands	Nov. 30, 2017	Feb. 28, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	$ 201,807	$ 189,629	[1]
United States, the Company’s country of domicile
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	134,943	133,492
Foreign
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	$ 66,864	$ 56,137

[1] Derived from audited financial statements.