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Segment Breakdown of Goodwill (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Segment Reporting Information [Line Items]
Goodwill	$ 394,787	$ 380,711
Cement [Member]
Segment Reporting Information [Line Items]
Goodwill	229,857	215,781
Concrete and Aggregates [Member]
Segment Reporting Information [Line Items]
Goodwill	40,774	40,774
Gypsum Wallboard [Member]
Segment Reporting Information [Line Items]
Goodwill	116,618	116,618
Paperboard [Member]
Segment Reporting Information [Line Items]
Goodwill	$ 7,538	$ 7,538

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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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.

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