Schedule of Inventories (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Inventory [Line Items]
Inventories	$ 233,543	$ 236,661
Raw Materials and Material-in-Progress [Member]
Inventory [Line Items]
Inventories	77,652	81,308
Finished Cement [Member]
Inventory [Line Items]
Inventories	34,653	38,769
Aggregates [Member]
Inventory [Line Items]
Inventories	7,436	3,558
Gypsum Wallboard [Member]
Inventory [Line Items]
Inventories	3,665	3,452
Paperboard [Member]
Inventory [Line Items]
Inventories	5,051	7,462
Repair Parts and Supplies [Member]
Inventory [Line Items]
Inventories	92,123	91,593
Fuel and Coal [Member]
Inventory [Line Items]
Inventories	$ 12,963	$ 10,519