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SUBSEQUENT EVENT (Details) (USD $)
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3 Months Ended | 12 Months Ended | 0 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Oct. 31, 2012
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Jul. 31, 2012
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Apr. 30, 2012
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Jan. 31, 2012
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Oct. 31, 2011
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Jul. 31, 2011
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Apr. 30, 2011
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Jan. 31, 2011
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Oct. 31, 2012
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Oct. 31, 2011
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Oct. 31, 2010
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Dec. 05, 2012
Dividend Declared
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| Subsequent Event | ||||||||||||
| Quarterly dividend declared | $ 0.46 | $ 0.46 | $ 0.46 | $ 0.41 | $ 0.41 | $ 0.41 | $ 0.35 | $ 0.35 | $ 1.79 | $ 1.52 | $ 1.16 | $ 0.46 |