Long-Term Incentives (Detail) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2012	Feb. 29, 2012
Schedule Of Other Liabilities Noncurrent [Line Items]
Long-Term incentives	$ 3,163	$ 3,420
Long-Term Incentives
Schedule Of Other Liabilities Noncurrent [Line Items]
Long-Term incentives	508	822
Phantom Stock Liability
Schedule Of Other Liabilities Noncurrent [Line Items]
Long-Term incentives	$ 2,655	$ 2,598

Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable beyond one year (or the operating cycle, if longer).

No definition available.

Name:	us-gaap_DeferredCompensationLiabilityClassifiedNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant