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Stockholders' Equity (Changes in Nonvested Stock Options) (Details) - $ / shares shares in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2018
Stock-Based Compensation
Number of Options, beginning balance	2,022	2,072
Weighted-Average Grant Date Fair Value Per Share, beginning balance	$ 21.63	$ 18.61
Options granted, Number of options		750
Options granted, Weighted-Average Grant Date Fair Value Per Share		$ 25.66
Options vested, Number of options		(791)
Options vested, Weighted-Average Grant Date Fair Value Per Share		$ 17.57
Options forfeited, Number of options	(15)	(24)
Options forfeited, Weighted-Average Grant Date Fair Value Per Share	$ 20.85	$ 20.45
Number of Options, ending balance	2,007	2,007
Weighted-Average Grant Date Fair Value Per Share, ending balance	$ 21.64	$ 21.64

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Number of non-vested options outstanding.

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