Summary of Significant Accounting Policies (Tables)

9 Months Ended

Jun. 30, 2018

Accounting Policies [Abstract]

Shares Used in Computing Basic and Diluted Earnings Per Share

Shares used in computing basic and diluted earnings per share are as follows:

	Three Months Ended June 30,		Nine Months Ended June 30,
	2018	2017	2018	2017
Denominator (thousands of shares):
Weighted-average common shares outstanding — basic	173,991	173,742	173,744	173,625
Incremental shares issuable for stock options and awards (a)	2,816	—	2,958	3,500
Weighted-average common shares outstanding — diluted	176,807	173,742	176,702	177,125

(a) For the three months ended June 30, 2018 and the nine months ended June 30, 2018 and 2017, there were no shares associated with outstanding stock option awards that were excluded in the computation of diluted earnings per share above because their effect was antidilutive. For the three months ended June 30, 2017, incremental shares of 3,556 have been excluded due to the net loss for the period.