Stock Compensation - Annual RSUs and Annual PSUs (Details) - Stock Incentive Plan 2015 - $ / shares	3 Months Ended	9 Months Ended
Dec. 31, 2018	Dec. 31, 2018
Annual RSUs
Number of Shares
Granted (in shares)	765	60,000
Weighted- Average Grant-Date Fair Value
Granted (in dollars per share)	$ 127.27	$ 115.80
Annual PSUs
Number of Shares
Granted (in shares)	0	31,320
Weighted- Average Grant-Date Fair Value
Granted (in dollars per share)	$ 0.00	$ 116.34
Annual RSUs and Annual PSUs
Number of Shares
Granted (in shares)	765	91,320
Weighted- Average Grant-Date Fair Value
Granted (in dollars per share)	$ 127.27	$ 115.98

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).

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)(2)(iii)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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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).

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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