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Significant Accounting Policies (Details)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Denominator (thousands of shares):        
Average common shares outstanding for basic computation (in shares) 112,726 112,020 112,484 111,515
Incremental shares issuable for stock options and awards (in shares) 0 0 811 1,531
Average common shares outstanding for diluted computation (in shares) 112,726 112,020 113,295 113,046