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Aggregate number of common shares reserved for future issuance.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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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.

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-Name Accounting Standards Codification

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-Section 45

-Paragraph 28

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General descriptive information regarding an arrangement under which employees and directors receive: (a) awards of equity shares, equity share options, or other equity instruments; or (b) the entity incurs liabilities to them: (1) in amounts based, at least in part, on the price of the entity's shares or other equity instruments; or (2) that require or may require settlement by issuance of the entity's shares. Such an arrangement is usually provided to employees and directors to compensate them, provide performance incentives to them, and to attract or retain their services. May also include pertinent information particular to a plan that is not elsewhere specified in the taxonomy.

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-Name Accounting Standards Codification

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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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).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Date the equity-based award expires, in CCYY-MM-DD format.

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-Section 50

-Paragraph 2

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net 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.

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Percentage of vesting of share-based compensation awards.

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Intrinsic value of equity-based compensation awards not vested. Excludes stock and unit options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-Based Compensation - Additional Information (Detail) $ / shares in Units, $ in Thousands		3 Months Ended		36 Months Ended
	Feb. 26, 2015 shares	Sep. 30, 2015 USD ($) award $ / shares shares	Sep. 30, 2014 USD ($) $ / shares shares	Sep. 30, 2014 shares	Dec. 04, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options, granted		0
Share-based compensation \| $		$ 8,392	$ 10,818
Total income tax benefit recognized \| $		$ 2,000	$ 3,000
Weighted-average grant-date fair value of options granted \| $ / shares		$ 0.00	$ 26.68
Total intrinsic value of options exercised \| $		$ 2,300	$ 7,600
Extended vesting period after employee termination, days		90 days
Cliff vesting period, in years		3 years	3 years
Cash-Settled Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		1,709
Stock options cancelled		0
Restricted stock units vested		4,161
Red Bend Ltd. [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options cancelled		76,563
Restricted stock units vested	58,137
Red Bend Ltd. [Member] \| Share-based Compensation Award, Tranche One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period		4 years
Time-vested restricted stock units, description		Ratably every three months over a four-year period
Red Bend Ltd. [Member] \| Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Time-vested restricted stock units, description		25 percent in the first year and ratably every three months thereafter, for the remaining three-year term of the award.
Vesting percentage of Time-vested restricted stock units		25.00%
Red Bend Ltd. [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exchanged		76,563
Restricted stock units vested		58,137
Restricted stock units expected to vest		18,426
2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant		3,064,833
Stock Option and Incentive Plan, maturity date		Dec. 07, 2021
Additional Shares available for grant					2,869,821
Awards vesting period		3 years	3 years
Reduction in shares available for grant for one award under the plan		1
Number of awards \| award		2
Cash-settled restricted stock units, outstanding		6,392
2012 Plan [Member] \| Option or Stock Appreciation Right Grant [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards for reduction of shares available for grant under 2012 Plan \| award		1
2012 Plan [Member] \| Full-Value Grant [Member] \| Prior to December 4, 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in shares available for grant for one award under the plan		1.71
2012 Plan [Member] \| Full-Value Grant [Member] \| On or After December 4, 2013 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reduction in shares available for grant for one award under the plan		1.5
2012 Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares of our common stock under 2012 Plan					7,269,821
2012 Plan [Member] \| Cash-Settled Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		4,923	856
Number of restricted stock units settled		869	1,150
2012 Plan [Member] \| Options to Purchase Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock options, granted		0
Option awards expiration period		10 years
2012 Plan [Member] \| Options to Purchase Common Stock [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period		3 years
2012 Plan [Member] \| Options to Purchase Common Stock [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards vesting period		5 years
2012 Plan [Member] \| Stock-Settled Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		679,876
2012 Plan [Member] \| Cash-Settled Stock Appreciation Rights [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		1,709
Restricted Stock Units with Earning Per Share Performance Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		174,676	98,586
Restricted Stock Units with Market Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		174,676	98,586
Monte Carlo Simulation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units, grant date fair value \| $		$ 12,300	$ 7,500
Time Vested Restricted Stock Units Cliff Vest [Member] \| 2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		5,243		188,255
Restricted stock units vesting period		3 years		3 years
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost \| $		$ 145,700
Aggregate intrinsic value of equity classified restricted stock \| $		$ 102,800
Weighted average recognition period, years		2 years 1 month 6 days
Time Vested Restricted Stock Units Ratably Vest [Member] \| 2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		324,987		0
Restricted stock units vesting period		3 years		3 years
Time Vested Restricted Stock Units Cliff Vest One [Member] \| 2012 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards granted		294		0
Restricted stock units vesting period		1 year		1 year