Schedule of Inventories (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Mar. 31, 2022
Inventory [Line Items]
Inventories	$ 225,835	$ 236,661
Raw Materials and Material-in-Progress [Member]
Inventory [Line Items]
Inventories	72,610	81,308
Finished Cement [Member]
Inventory [Line Items]
Inventories	26,671	38,769
Aggregates [Member]
Inventory [Line Items]
Inventories	6,753	3,558
Gypsum Wallboard [Member]
Inventory [Line Items]
Inventories	3,357	3,452
Paperboard [Member]
Inventory [Line Items]
Inventories	5,371	7,462
Repair Parts and Supplies [Member]
Inventory [Line Items]
Inventories	98,547	91,593
Fuel and Coal [Member]
Inventory [Line Items]
Inventories	$ 12,526	$ 10,519