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Significant Accounting Policies (Details) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Denominator (thousands of shares):
Average common shares outstanding for basic computation (in shares)	113,136	112,240
Incremental shares issuable for stock options and awards (in shares)	1,354	912
Average common shares outstanding for diluted computation (in shares)	114,490	113,152

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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