Summary of Tangible Long-Lived Assets (Detail) - USD ($) $ in Thousands	May 31, 2017	Feb. 28, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	$ 195,281	$ 189,629	[1]
United States, the Company's Country of Domicile
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	135,119	133,492
Foreign
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	$ 60,162	$ 56,137

[1] Derived from audited financial statements.