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Employee Benefit Plans (Unamortized Share-Based Compensation Expense) (Details) $ in Thousands	12 Months Ended
	Mar. 31, 2021 USD ($)
Employee Benefit Plan
Unamortized Expense	$ 123,699
ESPP
Employee Benefit Plan
Unamortized Expense	$ 2,636
Remaining Months	4 months
Stock Options
Employee Benefit Plan
Unamortized Expense	$ 2,104
Remaining Months	12 months
Time-based RSUs
Employee Benefit Plan
Unamortized Expense	$ 84,143
Remaining Months	24 months
Market-based and performance-based RSUs
Employee Benefit Plan
Unamortized Expense	$ 34,816
Remaining Months	22 months

X

- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

+ 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 (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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X

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

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+ References

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