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Benefit Plans and Stock-Based Compensation - Additional Information (Parenthetical) (Detail) $ in Thousands	12 Months Ended
	Mar. 31, 2018 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity cash-out payment, option	(60,000)
Former Senior Executive [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity cash-out payment | $	$ 42,000
Omnibus LTIP [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity cash-out payment, option	25,000,000
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Equity cash-out payment, option	35,000,000

X

- Definition

Share Based Compensation Arrangement By Share Based Payment Award Options, Equity Cash-Out Payment

+ References

No definition available.

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X

- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Equity Cash-Out Payment

+ References

No definition available.

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X

- 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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- Details

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