Fair Value Measurements Assets and Liabilities Accounted for at Fair Value on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2014	Feb. 28, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	$ 6,750	$ 6,500
Total assets measured at fair value on a recurring basis	6,750	6,500
Share-based compensation arrangement	2,926	0
Share-based compensation arrangement		714
Interest rate swap agreement	94	107
Total liabilities measured at fair value on a recurring basis	3,020	821
Level 1 Quoted Price in Active Markets for Identical Assets or Liabilities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities
Total assets measured at fair value on a recurring basis
Share-based compensation arrangement	2,926
Share-based compensation arrangement		714
Interest rate swap agreement
Total liabilities measured at fair value on a recurring basis	2,926	714
Level 2 Significant Other Observable Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities
Total assets measured at fair value on a recurring basis
Share-based compensation arrangement	0
Share-based compensation arrangement		0
Interest rate swap agreement	94	107
Total liabilities measured at fair value on a recurring basis	94	107
Level 3 Significant Unobservable Inputs
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available for sale securities	6,750	6,500
Total assets measured at fair value on a recurring basis	6,750	6,500
Share-based compensation arrangement	0
Share-based compensation arrangement		0
Interest rate swap agreement
Total liabilities measured at fair value on a recurring basis

- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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