Significant Accounting Policies - Shares Used in Computing Basic and Diluted Earnings Per Share (Details) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Denominator (thousands of shares):
Average common shares outstanding for basic computation (in shares)	115,370	114,240	115,121	113,693
Incremental shares issuable for stock options and awards (in shares)	1,678	1,956	1,610	1,582
Average common shares outstanding for diluted computation (in shares)	117,048	116,196	116,731	115,275