Schedule of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Mar. 31, 2021
Inventory [Line Items]
Inventories	$ 211,978	$ 235,749
Raw Materials and Material-in-Progress [Member]
Inventory [Line Items]
Inventories	63,068	92,696
Finished Cement [Member]
Inventory [Line Items]
Inventories	32,010	34,362
Aggregates [Member]
Inventory [Line Items]
Inventories	3,669	2,933
Gypsum Wallboard [Member]
Inventory [Line Items]
Inventories	6,183	4,177
Paperboard [Member]
Inventory [Line Items]
Inventories	7,271	5,031
Repair Parts and Supplies [Member]
Inventory [Line Items]
Inventories	90,549	86,750
Fuel and Coal [Member]
Inventory [Line Items]
Inventories	$ 9,228	$ 9,800