Summary of Tangible Long-Lived Assets (Detail) - USD ($) $ in Thousands	May. 31, 2015	Feb. 28, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	$ 168,391	$ 172,151	[1]
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	129,495	131,792
Foreign
Segment Reporting, Asset Reconciling Item [Line Items]
Total tangible long-lived assets	$ 38,896	$ 40,359

[1] Derived from audited financial statements.