Exercise Price as Percentage of Fair Value of Common Stock

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- Definition

Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Performance Target Probable to be Achieved

+ References

No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

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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.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

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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.

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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).

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued 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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- Definition

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

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

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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- 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.

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

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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- Definition

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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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Description of pertinent provisions of equity-based compensation awards that have actual or potential impact upon the company's financial statements.

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Stock Award Plans and Stock-Based Compensation - Additional Information (Detail) (USD $)	12 Months Ended			1 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013	May 31, 2014	May 31, 2013	May 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award plans, outstanding stock options expiration period	10 years
Description of share counts for awards other than 2008 Stock Incentive Plan	Each share of stock issued pursuant to any other type of award counts as 1.58 shares against the maximum number of shares issuable under the Plan for grants made on or after August 11, 2010 (and as 1.5 shares for grants made prior to that date).
Shares available for future issuance under the Plan	1,841,000
Aggregate intrinsic value of options exercised in period	$ 20,000,000	$ 16,300,000	$ 4,600,000
Proceeds from the exercise of stock options	10,927,000	9,360,000	2,936,000
Fair value of options vested in period	2,600,000	2,500,000	2,600,000
Weighted average grant-date fair value for options granted	$ 9.29	$ 9.85	$ 9.66
Expected dividend yield	0.00%
Stock-based compensation	16,520,000us-gaap_ShareBasedCompensation	11,218,000us-gaap_ShareBasedCompensation	9,501,000us-gaap_ShareBasedCompensation
ESPP, exercise price as a percentage of its market price	85.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	4,600,000
Unrecognized stock-based compensation expense, weighted-average recognition period	2 years 1 month 6 days
Stock-based compensation	2,708,000	2,679,000	2,680,000
Performance Based Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	4,300,000
Unrecognized stock-based compensation expense, weighted-average recognition period	1 year 6 months
Shares of award granted, it is probable that the prescribed performance targets will be met	50,000
Stock-based compensation	8,000,000
Performance Based Restricted Stock and Restricted Stock Units \| Share Based Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of award granted				379,752	268,988	195,188
Performance Based Restricted Stock and Restricted Stock Units \| May 2014 Outstanding awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of award vested	373,938
Performance Based Restricted Stock and Restricted Stock Units \| May 2013 Outstanding awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of award vested	149,265
Restricted Stock and Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	10,900,000
Unrecognized stock-based compensation expense, weighted-average recognition period	1 year 8 months 12 days
Weighted average grant-date fair value for restricted stock and restricted stock units granted	$ 22.07	$ 23.34	$ 21.82
Fair value of restricted stock and restricted stock units vested in period	11,200,000	6,000,000	3,000,000
Shares of award granted	674,000
Shares of award vested	543,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation	$ 273,000	$ 217,000	$ 198,000