Employee Stock Purchase Plan Option, Offering Period

No definition available.

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- Definition

Estimated Forfeiture Rate For Grants Awarded To All Other Employees

+ References

No definition available.

+ Details

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- Definition

Estimated Forfeiture Rate For Grants Awarded To Executive Officers And Board Of Directors

+ References

No definition available.

+ Details

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- Definition

Percentage of the aggregate number of RSUs granted that vest in equal quarterly increments.

+ References

No definition available.

+ Details

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- Definition

Percentage of annual equity awards RSU grant subject to performance based vesting.

+ References

No definition available.

+ Details

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- Definition

Percentage of annual equity awards RSU grant subject to performance based vesting in each period.

+ References

No definition available.

+ Details

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- Definition

Percentage of over-achievement threshold to which the goals are entitled.

+ References

No definition available.

+ Details

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- Definition

Percentage Of Quarterly EBITDA Goal To Be Achieved For Performance Stock Grant

+ References

No definition available.

+ Details

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- Definition

Percentage of quarterly performance stock grant based on achieving EBITDA goal.

+ References

No definition available.

+ Details

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- Definition

Percentage of quarterly performance stock grant based on achieving quarterly revenue goal.

+ References

No definition available.

+ Details

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- Definition

Percentage of quarterly revenue goal to be achieved for performance stock grant.

+ References

No definition available.

+ Details

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- Definition

Portion of RSU grant subject to Company achieving specified quarterly revenue and EBITDA goals

+ References

No definition available.

+ Details

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- Definition

Threshold percentage of targeted goals above which quarterly performance stock grant is paid linearly

+ References

No definition available.

+ Details

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- Definition

As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

+ 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 (i)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph h

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

+ Details

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- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target 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)(2)(iii)(1)

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph b(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ 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 (f)(2)(iii)

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(c)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

-URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (f)(2)(i)

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ 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 (f)(2)(ii)

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(b)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ 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 (f)(2)(iv)

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

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph e(2)(d)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Summary Of Significant Accounting Policies (Stock-Based Compensation) (Details) (USD $)	0 Months Ended	12 Months Ended			1 Months Ended
	Oct. 29, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Nov. 30, 2011 Annual Equity Program [Member]	Aug. 31, 2011 Annual Equity Program [Member]	Aug. 31, 2010 Annual Equity Program [Member]	Aug. 31, 2010 Retention Awards Program [Member]	Nov. 30, 2012 Annual Equity Program [Member]	Nov. 30, 2011 Annual Equity Program [Member]	Aug. 31, 2011 Annual Equity Program [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation		$ 104,212,000	$ 95,348,000	$ 89,747,000
Unrecognized stock-based compensation cost		$ 82,500,000
Unrecognized stock-based compensation cost, period for recognition, years		2 years
Approved RSUs to employees and executive officers pursuant to the Company's annual equity awards program	1,467,871					170,390	181,334	83,000	290,415	82,968
ESSP option, offering period		6 months
Estimated forfeiture rate for grants awarded to executive officers and board of directors		7.00%
Estimated forfeiture rate for grants awarded to all other employees		8.00%
Percentage of the aggregate number of RSUs granted that vest in equal quarterly increments					50.00%	50.00%	50.00%		50.00%
Annual equity awards program vesting period					3 years	3 years	3 years		4 years
Portion of RSU grant subject to Company achieving specified quarterly revenue and EBITDA goals									0.125	0.167	0.167
Percentage of quarterly performance stock grant based on achieving quarterly revenue goal									50.00%
Percentage of quarterly performance stock grant based on achieving EBITDA goal									50.00%
Percentage of over-achievement threshold to which the goals are entitled									100.00%
Percentage of annual equity awards RSU grant subject to performance based vesting					33.33%	33.33%			37.50%
Percentage of annual equity awards RSU grant subject to performance based vesting in each period					16.66%	16.66%			12.50%
Percentage of quarterly revenue goal to be achieved for performance stock grant									80.00%
Percentage Of Quarterly EBITDA Goal To Be Achieved For Performance Stock Grant									80.00%
Threshold percentage of targeted goals above which quarterly performance stock grant is paid linearly									80.00%
Fair Value Assumptions
Risk-free interest rate		0.06%	0.14%	0.10%
Expected dividend		0.00%	0.00%	0.00%
Expected term		6 months	6 months	6 months
Expected volatility		42.92%	45.20%	53.87%