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Condensed Consolidated Statements Of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
May 31, 2013 | May 31, 2012 | May 31, 2013 | May 31, 2012
Condensed Consolidated Statements Of Comprehensive Income [Abstract] |  |  |  |
Other comprehensive income, tax expense (benefit) | $ (10) | $ 530 | $ (128) | $ 885

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