Segment Breakdown of Goodwill (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Mar. 31, 2022
Segment Reporting Information [Line Items]
Goodwill	$ 380,711	$ 329,137
Cement [Member]
Segment Reporting Information [Line Items]
Goodwill	215,781	203,342
Concrete and Aggregates [Member]
Segment Reporting Information [Line Items]
Goodwill	40,774	1,639
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

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.