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Schedule of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,200,652	$ 2,691,649
Accumulated Depreciation	(1,438,543)	(1,264,710)
Property, Plant and Equipment, Net	1,762,109	1,426,939
Land And Quarries [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	431,242	379,337
Plants [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	2,483,246	2,006,870
Buildings Machinery And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	255,758	219,556
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 30,406	$ 85,886

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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