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Stockholders' Equity (Changes in Nonvested Stock Options) (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Number of Options, beginning balance	1,670
Weighted-Average Exercise Price Per Share, beginning balance	$ 27.07
Options granted, Number of options	693
Options granted, Weighted-Average Exercise Price Per Share	$ 33.72
Options vested, Number of options	(596)
Options vested, Weighted-Average Exercise Price Per Share	$ 26.26
Options forfeited, Number of options	(30)
Options forfeited, Weighted-Average Exercise Price Per Share	$ 29.11
Number of Options, ending balance	1,737
Weighted-Average Exercise Price Per Share, ending balance	$ 29.97
Stock Options [Member]
Options granted, Weighted-Average Exercise Price Per Share	$ 15.84	$ 12.14	$ 15.00

X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

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=6415400&loc=d3e5070-113901

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X

- Definition

Number of non-vested options outstanding.

+ References

No definition available.

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X

- Definition

Number of non-vested options forfeited.

+ References

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- Definition

Weighted average grant-date fair value of non-vested options forfeited.

+ References

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- Definition

Weighted average grant-date fair value of non-vested options outstanding.

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- Definition

Number of options vested.

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- Definition

Weighted average grant-date fair value of options vested.

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