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Consolidated Statement Of Stockholders' Equity And Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified |
6 Months Ended |
|---|---|
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Nov. 30, 2011
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| Consolidated Statement Of Stockholders' Equity And Comprehensive Income [Abstract] | |
| Unrealized loss on marketable securities, tax | $ 9 |
| Unrealized loss on interest rate swap, tax | $ 1 |