Property Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2025	Mar. 31, 2024
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,423,128	$ 3,164,817
Accumulated Depreciation	(1,630,146)	(1,488,600)
Property, Plant and Equipment, Net	1,792,982	1,676,217
Land And Quarries [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	364,547	330,874
Plants [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,567,537	2,501,627
Buildings Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	312,872	264,180
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 178,172	$ 68,136