Summary of Significant Accounting Policies (Details 1) (USD $) In Thousands, unless otherwise specified	Feb. 28, 2013
Schedule of contractual maturities of the Company's available-for-sale non-equity investments
Maturing within one year, cost basis	$ 4,164
Maturing in one to three years, cost basis	996
Available-for-sale securities, cost basis, Total	5,160
Maturing within one year, fair value basis	4,172
Maturing in one to three years, fair value basis	1,001
Available-for-sale securities, fair value basis, Total	$ 5,173

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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- Definition

Amount of available-for-sale debt securities at cost, net of adjustments, maturing in the next fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.

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