Share Based Awards - Summary of Stock Options By Grant Date (Details)	6 Months Ended
Sep. 30, 2018 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Exercise Price Granted (in USD per share) \| $ / shares	$ 17.57
2015 Plan \| Employee Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted \| shares	301,130
2015 Plan \| Employee Stock Options \| May 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted \| shares	241,130
Exercise Price Granted (in USD per share) \| $ / shares	$ 16.83
Vesting period	4 years
Expiration	Jun. 01, 2026
2015 Plan \| Employee Stock Options \| August 3, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of shares granted \| shares	60,000
Exercise Price Granted (in USD per share) \| $ / shares	$ 21.27
Vesting period	4 years
Expiration	Aug. 03, 2026

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

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

+ 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

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

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

+ 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
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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- Definition

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

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