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.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

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

+ References

No definition available.

+ Details

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

+ References

No definition available.

+ Details

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

Amount of stock repurchase plan authorized.

+ References

No definition available.

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- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

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Subsequent Events (Details) - USD ($)				12 Months Ended
Subsequent Events (Details) - USD ($)	May 06, 2019	May 07, 2018	Aug. 01, 2017	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017	May 08, 2019
Subsequent Event [Line Items]
Options, grant date fair value (in USD per share)				$ 29.46	$ 56.11	$ 55.86
Options granted (in shares)				294,500	182,800	264,300
Performance Units
Subsequent Event [Line Items]
Common stock units granted in period (in shares)		103,406
Restricted Stock Units (RSUs)
Subsequent Event [Line Items]
Common stock units granted in period (in shares)		100,399	3,779	226,400	105,800	68,400
Options granted (in shares)			1
Award vesting period				3 years
Stock Options
Subsequent Event [Line Items]
Options granted (in shares)		294,484	1
Subsequent Event
Subsequent Event [Line Items]
Stock repurchase program, authorized amount							$ 50,000,000.0
Options, grant date fair value (in USD per share)	$ 30.56
Subsequent Event \| Performance Units
Subsequent Event [Line Items]
Common stock units granted in period (in shares)	98,645
Award vesting period	3 years
Subsequent Event \| Restricted Stock Units (RSUs)
Subsequent Event [Line Items]
Vesting rights (as percent)	33.30%
Common stock units granted in period (in shares)	89,284
Award vesting period	3 years
Subsequent Event \| Stock Options
Subsequent Event [Line Items]
Expiration period	10 years
Vesting rights (as percent)	33.30%
Options granted (in shares)	281,486
Award vesting period	3 years