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Amounts Changed to Expense Related to Continue Plans (Detail) - USD ($) $ in Thousands	4 Months Ended	5 Months Ended	12 Months Ended
	Jul. 31, 2017	Dec. 31, 2017	Mar. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Multinational plan expense		$ 81
Predecessor
Defined Benefit Plan Disclosure [Line Items]
Multinational plan expense	$ 67		$ 260

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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

Amount of cost (reversal of cost) for pension benefits. Excludes other postretirement benefits.

+ References

No definition available.

+ Details

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- Details

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