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Business Combination - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Jun. 30, 2018	Jun. 01, 2018
Business Acquisition [Line Items]
Common stock closing price		$ 33.39
Estimated weighted average useful lives	10 years
Preliminary estimated purchase price allocation to deferred tax assets	$ 28.4
Deferred tax liabilities	18.7
Capital distribution to members	65.3
Retained Earnings (Accumulated Deficit) [Member]
Business Acquisition [Line Items]
Capital distribution to members	22.5
Members' Contributed Capital [Member]
Business Acquisition [Line Items]
Capital distribution to members	$ 42.8

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Common stock closing price.

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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.

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Amount of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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