Stock-Based Compensation (Activity for Stock Option Awards) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2015	Mar. 31, 2015
Stock-Based Compensation
Number of options, beginning balance	5,170	4,501
Weighted Average Exercise Price Per Share, beginning balance	$ 30.83	$ 28.08
Options granted, Number of options	0	751
Options granted, Weighted Average Exercise Price Per Share		$ 45.55
Options exercised, Number of options	(42)	(108)
Options exercised, Weighted Average Exercise Price Per Share	$ 24.74	$ 22.57
Options forfeited, Number of options	(17)	(33)
Options forfeited, Weighted Average Exercise Price Per Share	$ 38.75	$ 37.09
Number of options, ending balance	5,111	5,111
Weighted Average Exercise Price Per Share, ending balance	$ 30.86	$ 30.86

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

+ 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 (c)(1)(iv)(3)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

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- Definition

Number of options outstanding, including both vested and non-vested options.

+ References

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- Definition

Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

+ References

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

+ References

No definition available.

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- Definition

Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

+ References

No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

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- Definition

Number of share options (or share units) exercised during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

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