Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2012

Significant Accounting Policies [Abstract]

Shares used in computing basic and diluted earnings per share

	Three Months Ended				Six Months Ended
	March 31,				March 31,
	2012		2011		2012		2011
Denominator (thousands of shares):
Average common shares outstanding for basic computation		112,510		111,637		112,380		111,267
Incremental shares issuable for stock options and awards		729		1,523		705		1,515
Average common shares outstanding for diluted computation		113,239		113,160		113,085		112,782