Share based compensation arrangement by share based payment award award performance period.

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- Definition

Share based compensation arrangement by share based payment award award vesting term.

+ 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
-Paragraph 2
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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

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- Definition

Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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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.

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- Definition

Description of award terms as to how many shares or portion of an award are no longer contingent on satisfaction of either a service condition, market condition or a performance condition, thereby giving the employee the legal right to convert the award to shares, to sell the shares, and be entitled to the cash proceeds of such sale. For example, vesting may be expressed as being 25 percent of the shares under option on each anniversary of the grant date.

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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 non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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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

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

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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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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-Publisher FASB
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- Definition

The policy, if any, for issuing shares (or other type of equity) upon exercise or conversion of equity-based awards into shares of stock or units, including the source of those shares or units (that is, new share, new unit, treasury shares or treasury units).

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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

Purchase price of common stock expressed as a percentage of its fair value.

+ References

No definition available.

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Stock Award Plans and Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended					12 Months Ended
	May 31, 2018	May 31, 2017	Nov. 30, 2016	May 31, 2016	Jun. 30, 2015	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value of options exercised in period						$ 174,000	$ 66,400	$ 74,800
Proceeds from the exercise of stock options						$ 12,949	$ 9,303	$ 10,660
Expected dividend yield						0.00%
2015 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option conversion description						Each share of stock issued pursuant to a stock option or stock appreciation right counts as one share against the maximum number of shares issuable under the 2015 Plan, while each share of stock issued pursuant to any other type of award counts as 1.8 shares against the maximum number of shares issuable under the 2015 Plan.
Shares available for future issuance under the Plan						3,895,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock award plans, outstanding stock options expiration period						10 years
Vesting period						3 years
Unrecognized stock-based compensation expense						$ 12,200
Unrecognized stock-based compensation expense, weighted-average recognition period						1 year 10 months 24 days
Expected dividend yield						0.00%
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period						3 years
Unrecognized stock-based compensation expense						$ 44,000
Unrecognized stock-based compensation expense, weighted-average recognition period						1 year 10 months 24 days
Expected dividend yield			0.00%		0.00%
Weighted average grant-date fair value						$ 376.95	$ 137.40	$ 97.43
Fair value of units vested						$ 171,300	$ 51,000	$ 51,300
Restricted share unit issued						195,000
Non-vested shares, outstanding						620,000	880,000
Share based payment award vesting term						2018-06
Share based compensation arrangement performance period						3 years
Equity award, vesting options						One-half of the restricted stock units vested in June 2018 based on performance criteria described above and the remaining half of the restricted stock units will vest in June 2019.
Restricted Stock Units \| Executive Office
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share unit issued			41,526
Performance and Market-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense						$ 17,800
Unrecognized stock-based compensation expense, weighted-average recognition period						1 year 10 months 24 days
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share unit issued	114,000	159,000		190,890
Performance Based Restricted Stock Units Issued in May 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares, outstanding						77,000
Performance Based Restricted Stock Units Issued in May 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares, outstanding						97,000
Performance Based Restricted Stock Units Issued in May 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Non-vested shares, outstanding						38,000
Market Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based payment award vesting term						2018-06
Share based compensation arrangement performance period						3 years
Equity award, vesting options						One-half of the market-based restricted stock units earned vested in June 2018 and the remaining restricted stock units will vest in June 2019 provided the executive officers are still employed with the Company.
Market Based Restricted Stock Units \| Chief Financial Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted share unit issued					322,980
Non-vested shares, outstanding					140,765
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
ESPP, exercise price as a percentage of its market price						85.00%